JPH01284815A - Camera system and lens - Google Patents

Abstract

PURPOSE:To enlarge the utilization range of a lens by applying a signal which can discriminate two camera being different functionally to those cameras from the lens side and installing one lens to two kinds of cameras, respectively so that the function of the lens can be utilized by any camera. CONSTITUTION:A switch So for applying a signal of lens information to a microcomputer muC of a camera side and lens circuit LE are provided as operat ing means on a first lens which can be installed in both of two kinds of cameras being different functionally. In this state, in a state that the switch So is OFF, an auto focus permitting signal is outputted, and also, in a state of ON, an auto focus inhibiting signal is outputted. As for that which is different function ally of the camera side, the auto focus permitting signal and inhibiting signal are outputted by reversing ON and OFF of the switch So. In such a way, when one lens has been installed in two kinds of cameras, respectively, the function of the lens can be utilized by any camera, and the utilization range of the lens function is enlarged.

Description

[Detailed description of the invention] On the peel (2) ■Sato branch The present invention has a first difference in function.

The present invention relates to a camera system including a second camera and a lens that can be attached to these cameras, and the lens thereof.

Speed Control 4I Ishisha In recent years, some camera systems are equipped with a switch on the lens side, and functions can be set by operating this switch. In such a case, the camera side is naturally configured to perform functions based on signals from the lens.

However, cameras manufactured before the construction of such systems (hereinafter referred to as "old cameras") are not configured to handle signals from such lenses. ,
Normally, the functions provided by the lens-side switch cannot be utilized. However, this would limit the range of use of new lens functions, so it would be desirable to be able to apply this to older cameras if possible.

The present invention has been made in view of the above, and an object of the present invention is to provide a new camera system and lens that are devised so that functions based on new signals from the lens can be utilized as much as possible in old cameras.

In order to achieve the above object for solving the problem, the present invention provides a camera system comprising a first camera, a second camera, and a first lens that can be attached to any of the cameras. The first lens includes an operating means, a signal output means for providing a lens information signal to the camera, and a first signal representing a first function from a first state to a first state by operating the operating means. 2, and a signal changing means for changing a second signal representing a second function from the first state to the second state; The first signal that discriminates only one signal
and a first control means for controlling the execution of a function according to the state of the first signal. The apparatus is configured to include a signal discrimination means, and a second control means for controlling execution of a function according to the state of the second signal.

At this time, the first signal indicates autofocus permission in its first state and indicates autofocus prohibition in its second state, and the second signal indicates OFF of the operating means in its first state. It can be configured to display ON in the second state.

Further, the camera system further includes the first camera system. The second lens includes a second lens attachable to the second camera, and the second lens includes an operating means, a signal output means for providing a lens information signal to the camera, and a first and signal changing means for changing a first signal indicating a function from a first state to a second state, and when the second lens is attached, the second camera changes the second signal from the first state to the second state. The first signal from the lens may be determined and the execution of a function may be controlled in accordance with the state of the first signal.

Furthermore, in the present invention, the first and second lenses configured as described above are used as the first and second lenses. It can be understood as a single lens that is intended to be used in a second camera.

In this way, the first camera that can distinguish the first signal,
A second camera that can distinguish at least the second signal receives these two signals (i.e., the first
signal and a second signal), it is possible to utilize the functions of the first lens for each of two types of cameras that have functional differences.

Furthermore, even if a second lens that outputs only the first signal is attached as a lens, it goes without saying that the first camera can utilize this first signal, but on the other hand, the second camera If the camera is able to distinguish not only the second signal but also the first signal when the camera is attached, the first signal can be utilized, and in the end, the function of the second lens can also be determined by the first signal. This means that the second camera can be used.

1 spot Embodiments of the present invention will be described below with reference to the drawings.

In the following description, not only the camera system of the present invention but also the entire system including parts and other functions not directly related to the present invention will be described.

FIG. 1 is a circuit block diagram of the camera of this embodiment. In the figure, (μC) is the control of the entire camera.

HtPRO? is a microcomputer (hereinafter referred to as "microcomputer") that performs various calculations. + so that writing and reading can be freely performed internally.

(AFct) is a focus detection circuit that performs focus detection,
Consists of CCD, integral control circuit, and A/D conversion circuit.
Information on the subject is obtained for three distance measurement areas, which will be described later, and this information is A/D converted and output to a microcomputer (μC). (LD+) is an auxiliary light emitting element that emits light toward a subject to enable focus detection when the brightness is low and focus cannot be detected.

(LM) is a photometry circuit that performs photometry for four areas (described later), converts the photometry values into A/D, and converts the photometry values into microcontroller (μ
C) as luminance information. (RSPc) is a display control circuit that inputs display data and display control signals from a microcomputer (μC) and causes the display section on the top of the camera body (DISP I) and the display section in the viewfinder (DISPI) to display a predetermined display. be.

In this embodiment, there are two types of IC cards: a mode setting card that sets the camera mode and a program card that determines exposure. Only 01 of these cards can be installed in the camera, and the camera is to control specific modes, exposure programs, and funk silanes. This will be explained in detail later. (ST
) is the electronic flash unit L (IF) is the camera's microcomputer (μC).
) and an electronic flash device (ST).

(STC) is a light control circuit that receives reflected light from a subject during flash emission that has passed through a photographic lens (not shown), and stops the flash emission when the appropriate exposure amount is reached.

(LE) is a lens circuit provided in the lens and outputs information specific to the interchangeable lens to the microcomputer (μC) of the camera.
(LECN) is a lens drive control circuit that drives the photographing lens based on focus detection information, (TVcr) is a shutter control circuit that controls the shutter based on a control signal from a microcomputer (μC), and (AVcy) is a microcomputer (μC). ) is a diaphragm control circuit that controls the diaphragm based on a control signal from a microcomputer (μC), and (MD) is a motor control circuit that controls film winding and rewinding based on a control signal from a microcomputer (μC). (BZ) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is the battery that serves as the power source, (DI) is the diode for backflow prevention, (cmu) is the microcontroller (μC)
This is a backup capacitor with a large capacity. (T.

) (C*) is a reset resistor and capacitor to reset the microcomputer (μC) when the battery is installed. (Tr+) is a power supply transistor that supplies power to a part of the circuit described above.

Next, to explain the switches, (sit) is a battery installation switch that turns OFF when a battery is installed, and when a battery is installed and the switch (S++t) turns OFF, the microcomputer (μC) A signal changing from the HI level to the RH level is applied to the terminal (RE), and the microcomputer (μC) executes the reset routine described below. (stn) is a normally open exposure mode change switch.
The exposure mode is changed by operating this switch (Six) and the up switch (Sup) and down switch (Sdn), which will be described later. (StuH) is a normally open function change switch. A function change (for example, switching between continuous shooting and single shooting) is performed by operating a switch (Sup) and a down switch (Sdn). (SCD) normally switches the card function between disabled and enabled when the card is installed, and if the mode setting card is installed and the data setting mode is selected, the changed data item is selected. This is a normally open card function enable/disable switch. In addition, the up switch (Sup
), the setting value in the item can be set by operating the down switch (Sdn). (Details will be explained later).

C3cDs) is a normally open card data setting switch that is operated when changing the mode setting or setting data necessary for the function when a mode setting card or function card (program card) is installed. .

(So) is a photometry switch that is operated to perform autofocus (hereinafter referred to as rAFJ) operation (camera operation (for example, photometry and display of various data). Consists of a touch switch that turns ON.The above switch (Stx)
(SF(IN) (See) (Sees) (So
) is turned on, the microcontroller (μ
C) executes the interrupt flow (INT,) in FIG. 3, which will be described later. (S,) is an AF switch that starts the AF operation, and is turned on when the first stroke of the release button is pressed. (S is a release switch that is operated when performing a shooting operation, and is turned on when the second stroke (deeper than the first stroke) of the release button is pressed. (
Sl) is a one-frame switch that is turned ON when one frame of film is wound.

(SA!L) is a switch for performing AE lock (exposure lock) and is composed of a normally open bushing switch. (S□7□) is a focus adjustment mode changeover switch for switching between AF and manual focus adjustment.

(SSC) is a normally open change data selection switch for selecting data to be changed. (S!tLF) is a self-mode switch operated during self-imaging. (Say) is an aperture change switch that changes the aperture value by operating this switch and operating the up switch or down switch when the exposure mode is M mode (manual mode). Shutter speed can be changed by operating the switch or down switch. (SFLH) is a film detection switch that detects whether or not film is loaded, and is placed on the film rail surface near the spool chamber, and is turned off when film is present. (SaC) is a back cover close detection switch that turns OFF when ONL is opened when the back cover is closed. When this switch is turned ON, the microcomputer (μC) executes an interrupt routine to be described later. (Sl1w) is a switch for starting film rewinding. When operated, ONL and an interrupt routine to be described later are executed, and when the IBM is opened, it is turned OFF. (scm) is an IC card mounting switch that turns OFF when an IC card (CD) is mounted, and when turned OFF, resets the microcomputer (μCz) of the IC card (CD). (x) is the so-called X contact, and it turns ON when the shutter completes the first curtain fastening! ,, it turns off when the release member (not shown) is charged.

(Sup) is an up switch that changes or adds data to be changed, and (Sdn) is a down switch that also performs subtraction. When changing the aperture value in M mode, turn on the aperture change switch (SAV) and (
Adjust the aperture value by operating Sup) and (Sdn), respectively.

Down, aperture change switch OFF and (Sup),
(Sdn) to adjust the shutter speed knob,
Performs the function of down. However, the OF of the aperture change switch (SAV) may be changed due to the function change using the IC card described later.
You can change the aperture by pressing F, and change the shutter speed by turning on the aperture change switch (Sav). When the input switch (Sup) and down switch (Sdn) are operated, the terminals (IPzo) and (IPt+) are respectively "L".
” level is detected. In Figure 1, the line (old) common to each of the above switches is the ground potential point (GN
D).

Table 1 summarizes the above-mentioned switches and their functions.

Next, before explaining the operation of the camera of this embodiment, two types of IC cards used here, namely a mode setting card and a program card, will be explained.

<1) Mode setting card: This IC card allows the photographer to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are deemed unnecessary), or to select an alternative function. The intention of the photographer by doing.

The aim is to provide cameras that are compatible with photographic techniques. Further, since unnecessary functions can be omitted, the camera is simplified and has good operability when changing modes.Next, we will explain about this card and the contents displayed on it.

First, to select the functions of this IC card, (1) 4
(ii) selection of exposure mode, (ij)
Selection of AE amount-related functions (iv) Choice between I functions, (V)
This is related to the operation of the lens-side switch. and,
The four functions in (i) above are (a-1) Highlight reference/shadow reference exposure function (a-2) AI output correction function (a-3) Film advance mode switching function (quick shooting/single shooting) ( a-4) Spot AF/Multi-point AFt7] conversion function, and the photographer can select the necessary function from among these functions. The display section (DISP+) on the camera body regarding this selection is shown in Figure 2 (
Of all the display contents shown in a), those shown in FIG. 2(g)) are prepared. In FIG. 2, etc., the functions correspond to the functions (a-1) to (a-4) described above in order from the left side. If the photographer does not need only the highlight reference/shadow reference exposure function in (a-1), use the method shown in Figure 2 (C).
It will be displayed like this.

For each selected function, the display regarding the use or switching of the function is as follows: Highlight 1 - Standard - - - Figure 2 (d) Shadow reference - Figure 2 (e) Exposure Correction + side - Figure 2 (f) Exposure compensation - side - Figure 2 (6) Continuous shooting mode - Figure 2 (5)
Single shooting mode...--Figure 2 (i) Spot AF--Figure 2 U) Multi-point A
F-・-・・-1111 Figure 2 (b). As an exception, in the case of multi-point/spot selection by the program or spot selection by the switch (So) described later, the mode set by the above two is displayed only when it is selected, even though it is not selectable. be done. Note that regarding continuous shooting/single shooting and spot AP/multi-point AF, even if one of the functions (for example, continuous shooting) cannot be switched, it is always selected. However, since switching is not possible, it is not displayed.

The display in FIG. 2 (Il) shows that the exposure compensation function and the film winding mode switching function are selected, and that the exposure compensation + side and single shooting mode are controlled.

When setting, use the numbers "0" to "15" shown in Table 2 (a).
In order to show that the function is provided only for the function given to
, +], Fig. 2 (C) (I (equivalent to 1 number "8" without /S function only)] is displayed, and the number advances one by one by operating the up switch and down switch. There is.

Next, the exposure modes related to the exposure mode selection in (ii) above are: (b-1) Program mode (P mode) (b-2) Aperture priority mode (A mode) (b-3) Manual mode (M mode) ) (b-4) Shutter priority mode (S
As a basic rule, P mode is always set, and combinations of the remaining three modes (A, ?I, and S modes) can be selected. Therefore, there are eight possible combinations, and among the four mode displays (however, PROGRAM is represented by P) shown in FIG. The process is performed as shown in FIG. 2(n), and one exposure mode selected at the time of photographing is displayed [FIG. 2(0) (A mode selection)]. In addition, when in P mode, PROG
RA? It is displayed as I [Figure 2 (ρ)].

Next, the selection of the AE amount related functions mentioned above (city) includes the following.

(C-1) AE flock correlation (1) While pressing the AE flock button, keep the power of the camera in the AE flock state (2) If you press the AE flock chain once, press the AE flock button again in the AE flock state, or Power hold OFF''?1
'A Release the E lock state (C-2) Set the shutter speed to IAEv.

This allows the set shutter speed, which normally changes only in IEv increments, to be set in 'AEv increments.

(C-3) When the exposure mode is M mode ■ Leave the aperture change switch (Sav) OFF and change the aperture value by simply operating the up switch or down switch.
ay) operation (i.e., ON) to change the shutter speed (hereinafter referred to as "M! mode"), or ■Change the shutter speed with the aperture change switch (SAv) left OFF, or operate the aperture change switch (SAv) ( In other words, the mode in which the aperture value is changed when used in combination with (ON) (hereinafter referred to as "M1 mode")
Switching is performed.

When setting these functions, the display will be as shown in Figure 2 (v), rF-5J will indicate this mode change, and the number "2" will select the function shown in Table 2 (e). Show what you are doing.

Next, (iv) the choice between the two functions is (d-1) film counter forward or subtraction (d-2) presence or absence of auto return at the end of the film (af3: + ya return end When a part of the film leader is rolled into the cartridge or left outside the cartridge (d-4) With or without a camera shake warning buzzer (BZ), there are 16 possible combinations, as shown in Table 2 (b). Numbers are assigned to such combinations.Then, when setting the shutter speed, it is displayed as shown in Figure 2 (q), the last three digits of the shutter speed indicate the item to be changed, and the film counter indicates the items below that. ing.

The relationship depending on the operation of the lens side switch is what AP (autofocus) mode is selected when the switch provided on the lens side (described later) is operated. , ■First, when the switch is not operated (however, AP mode is selected), (E-1) One-shot AF (following judgment after focusing) in a multi-point/spot area (however, continuous in program mode) ■When the switch is operated (H-2) Focus lock (E-3) Spot AF (E-4) Continuous AF r).

In the same figure, rF-24 is the lens side switch (S,) (
36), and "3" indicates the mode (continuous AP). The selection numbers and functions are shown in Table 2 (c).

The mode setting card also has the following functions (vi) and (vi).

(vi) Setting the self-timer time The waiting time in Morph mode can be changed, for example, to 2 seconds, 5 seconds, or 10 seconds. The display in this case is shown in Figure 2 (S
), rF-3J indicates the self-time setting, and rlr indicates the setting seconds (5 seconds). The selection numbers and functions are shown in Table 2 (d).

(vi) AE level change This is to always correct the camera's exposure level by a certain amount.The setting level is +0.5. +0
．． 25. O, -0, 25, -0, 5 (Ev), and the selection numbers are numbered 0 to 4 (no table) in order from the left side. The display is shown in FIG. 2(1) and rF-
4J is AE level change mode.

It shows that "3" has been changed by '+0.25EvJ. In addition, in (i) to (vi) above, by turning on the card key once when setting the mode, (i) to (vi)
The modes vi) are selected in sequence, and by pressing the up or down switch, the function (set value) in that mode is selected.

The modes (i) to (vi) and functions can be set cyclically, respectively.

(II) Program card: The program card is used to control exposure programs and various camera controls, which are designed to take pictures of moving subjects in relatively bright places with a high-speed shutter that prevents camera shake. (Details will be explained later).

Next, we will explain the operation of the camera using a microcomputer (μC) shown in Figures 3 onwards.
) will be explained based on the flowchart, and each part will be explained in detail as necessary.

When the battery (E) is installed, the battery installation switch (S■)
turns OFF, and the terminal (RE) changes from “L” level to “H” level.
'' level is input, the built-in clock starts oscillating, and the clock is also sent from the microcomputer (μC) to the IC card (CD) via the terminal (φ). Then, the microcomputer (μC) executes the routine (RESET) shown in FIG. In this routine, a microcomputer (μC
) first performs an initial setting based on the fact that the battery has been installed (#5). This subroutine is shown in FIG.

In FIG. 4, the microcomputer (μC) prohibits all interrupts to this flow and sets all output terminals to the "L" level. Also, reset all the flags in the RAM [Table 8 (described later)] and RAM (registers), and set the flag (BATF) indicating when the battery is installed (1100~+
1110). This allows you to set the exposure mode to P mode, spot/multi-point AF to multi-point AF mode, single shooting (S)/continuous shooting (C).
) as single shot (S), exposure compensation, highlight (H)/
A mode in which shadow (S) is not performed, a mode in which F to one shot, a mode in which Full 1 light is not emitted, a forced non-emission mode, and a multi-point photometry mode are set. The contents of this functional data are shown in Table 3.

Next, check whether the mode setting card of the two types of IC cards mentioned above has been installed at least once and the mode setting has already been performed using the contents of E''FROM (MSb to be described later).

It is detected by examining the contents of If this is not the setting method, then an interrupt due to IC card installation (COIN
Disable interrupts other than T) and return (1135.
1140). If using the mode setting method, the contents of E"FROM (MSb described later) determines which mode is set.

~Contents of MSb3) to determine the part where the changed data is to be displayed. Highlight/Shadow mode (II/
S mode), n output correction mode (+/- mode).

Single shooting/continuous shooting switching mode (S/C mode), spot/
It is detected whether the mode is set in the order of multi-point AF switching mode (S/A mode), and if it is set, change data for the first set mode is set (11145 to 11182). The change data of the RAM and the setting mode data of the E"FROM are shown in Tables 4 and 5. In terms of display, the steps (11145 to 1182) correspond to determining the position of the cursor, which will be described later.

Next, in order to display these setting modes, control is performed to send data to a display control circuit (DISPC).

First, set the terminal (C3DISP) to r) (J level, notify the display control circuit (DISPC) of data communication, create data (see Table 9), perform serial communication, and when the data transfer is completed, the terminal (CSDISP) to rL" level, and the display control circuit (DISP) indicates the end of serial communication.
C) (1185-1200).

To briefly explain the operation in the case of serial communication, first, a clock is output from the serial clock terminal (SCK) in response to a serial communication command. The output side outputs one bit of data in synchronization with the rising edge of this clock, and the input end inputs one bit of data in synchronization with the falling edge of the clock. By doing this as many times as necessary, the necessary data can be obtained.

A display example of a normal close-up state is shown in FIG. 2(u).

In the example of Fig. 2 (u), the displayed contents include shutter speed (1000), aperture value (5, 6), and AE.
-! --)' (PROGRAM), number of films (with or without film) (17), focus mode (ON
E 5HOT AF).

There is a display of the function mode (the figure shown in the bottom line). These display data are shown in Table 9 (explanation will be made according to sequence-based display control). The display data here is bits bt to B4 of address (03H).
AE mode selected by the C card (CD), bits b0 to b of the address (04s) of the IC card (
Whether or not the mode is set by CD), the address (08M
) bits b4 to b1, (09H> bit b o
～b Using 7 IC cards (CDs) (iv)～(vi
i) Select the selection number set in the change mode
Read from ROM and set at each address. Also, the data in the data change display (b0 to b at address 0.58
2), When the battery is installed (OA, ba = 1) (OA, I).

~bs, bs+bi=o) are set at the respective addresses.

The display control circuit CDl5PC) receives the battery installation signal and displays the data in Figs. 34(a) to 34(e) at 0.5 second intervals according to the function data set in E"FROM.
) is driven to display the display section (DIsPl).

Data other than the above is also sent to the display control circuit, but the display control circuit receives the battery installation signal and
It operates to display the displays shown in FIGS. 34(a) to 34(e). The microcomputer (μC) performs 2. at step (1205).
Wait 5 seconds and let this display continue for 2.5 seconds. and,
Number of films stored in E'FROM N, (MSbi3
~MSb + s), film sensitivity Sv (MSbzo~
-3b, , ) is read and the number of films in the RAM is N1. Transfer to film sensitivity Sv (+1207),
After reading the L, card data communication I is performed to check whether an IC card is installed and the type of IC card (121).
0).

The subroutine of this card data communication I is shown in FIG. 5(a).
In the same figure, first, a terminal (C3CD) is connected to inform the IC card (CD) of communication with the IC card (CD).
) to rH level, set to data output mode, and send data indicating data communication I (see Table 6) to the IC card by serial transfer (1300 and 1305)
.

A microcomputer (μC) takes a certain amount of time to input this information on the IC card (CD) side, create the necessary data, and output it.
) waits (13!O). And this time, data is sent from the IC card (CD), so it operates in input mode,
Perform serial transfer with IC card (CD) (11315
), and when this is completed, the terminal (C3CD) is set to the "L" level (1320).

In this operation, the IC card (CD) side outputs 2 bytes of data, but this data is a byte signal indicating the presence/absence of the card, a byte signal indicating the type of card, and a 1 byte signal indicating the camera function. address (20,,21)
l).

Next, the type of IC card is determined in (11321), but in the case of a mode setting card, the data only indicates the type of IC card, and the second byte is all "0".
”, so it returns immediately, while in the case of a program card, the data includes not only the type of IC card but also the A.
One of F mode continuous/one shot (details will be described later), AF zone spot/multiple points, metering zone spot/multiple points, continuous shooting/single shooting, or nothing specified ( Next, it is determined whether the card function is selected (11322). When the card function is selected (CDFNF = 1), the function data is Fb of
! , Fbs, Fbs, Fb+2 to set the data (+1323), and return. On the other hand, if the card function is not selected, the process returns without rewriting the data.

Returning to Figure 4, the microcomputer (μC) inputs the input data (
(See Table 7) to determine whether or not an IC card is installed, and if it is not installed (20□ bo = 0
) returns without displaying the type of IC card. When an IC card is installed (20M bo = 1), the type of IC card is determined and the mode setting card (2
If 0H's bl=1), create the display data for this IC card (08M's bo=0) (11230), and if the program card (20M's b+=0), create the display data for the program (08H's bO=t). ) create (124
5).

In addition, the card function is ON (04M bo = 1), and the control signal 'OAH-0, 0, 0, 1, 0, 0, 0, 04 (
bo to b), the display control circuit (DISPC)
Output all display data to .

The display control circuit (DISPC) inputs a signal indicating when the IC card is inserted and waits for a certain period of time (0.5 seconds).
, displays data according to the card type.

An example of this display is shown in FIG. 35(a), -). Figure 35 (
(a) shows when the program card is installed, and (b) shows when the mode setting card is installed. At this time, the card function is forcibly turned on, so this data is also created and sent.

The microcomputer (μC) waits for this display time (0.5 seconds) in step (1270), sets a flag indicating that the card function is valid (1273), and in the next step enables all interrupts (11275), and then Step 3 (+110)
to move to.

In FIG. 3, after completing the initial setting (115), the exposure mode change switch (S!14), function change switch (SFIIN), card function enable/disable switch (Sc++), and card data setting switch (Scos) are activated.
, terminal (IPS) at step (+110) to determine whether any of the photometry switches (So) are turned on or not.
If none of the above switches are turned on (IPs-"HJ"), it is determined in step (+115) whether or not the battery installation flag (BATF) is set, and if it is set. In case,
After installing the battery, jump to step (+145) assuming that you have come to this step without doing anything, and then jump to step (114).
5) Follow the flow below to turn off the display and insert the IC card (
CD). First, as display data, O
A, -0,0,1,0,0,0,0,0, and output this data to the display control circuit (DISPC) (#45
~+160), therefore, the display is completely turned off.

The microcomputer (μC) sends the light-off data to the display control circuit (DISPC) as described above, and then sends a sleeve sign (command to stop the IC card) signal to the IC card (CD) (#65 to +175). This sleeve sign is constructed by bits csb and csb both becoming 1 as shown in Table 6.

After that, the transistor (Tr+) is turned off by setting the terminal (PM) to "L", and the flag (AELF) indicating the AE block and the flag (BAT) indicating when the battery is installed are turned off.
F), and all interrupts are enabled and stopped (177 to 195). Note that this halt (HALT) also halts the oscillation of the built-in clock.

In the above step (110), five switches (S
cI) + (SFIIN) + (ScI,) +
One of (ScIllg) and (So) is ON
If so, proceed to step (1190), reset the flag (BATF) indicating when the battery is installed, and at the same time, in the next step (110'0), turn one of the five switches on.
A flag (OFF) indicating that the button has been operated is set, routine [SO3] is executed, and the process returns to step (110). Routine (SO) is photometry and AF.

This routine performs display, exposure control, etc., and will be described in detail later.

In step (110), when none of the five switches are turned on and the battery is not installed (
BATF -0), it is determined whether a flag (OPF) that is set when passing through the -degree routine [SO3] is set (1115.125). When this flag is set, the power hold timer (
T,) is reset-started and the flag (OFF) is reset (130.135). Here, the timer (T,
) to reset and start (1130), the routine (#100) has been passed from - degree step (+110) to (1190) (#100), but currently none of the five switches are pressed. This is to extend the power retention for a certain period of time in consideration of the possibility that it may be turned on again, and the reason for resetting the flag (OFF) (1135) is to indicate that step (1130) has been passed. It is.

In step (125), if the flag (OFF) is not set, step (#30) (13
Skip step 5) and detect whether 10 seconds have passed for the reset-started timer described above.+140)
If 10 seconds have elapsed, the process proceeds to steps after (+145) to turn off the display and stop the IC card (CD).

If 10 seconds have not passed, step (+1110)
Enter [SO3] and repeat the routine.

Next, I will explain the control of the camera when an IC card (CD) is installed.
A signal that changes from the "L" level to the rH level is input to NT), and the interrupt routine (COINT) shown in FIG. 4 is executed. When entering this routine, the microcomputer (μC) sets a flag (OFF) to stop lens drive and maintain power supply (11290.11292).
). Next, in order to give top priority to the display of the type of the installed card, in step (11295) all other interruptions to this flow are prohibited, and the process proceeds to steps after step (#210). is displayed for a certain period of time as shown in FIG. Return to step (+110) in the figure. Switch (Sin) r (SFLI
N) + (Sep) + (Sc++s) +
When any one of (So) is turned ON and a signal that transitions from "H" level to "L" level is input to the interrupt terminal (INTO), the interrupt (INT,
) and executes the flow from step (190) onwards.

In addition, in the stopped state (HALT), any interrupt (INTO) (INTz) or (CDINT)
The clock starts oscillating even if the clock is applied, and the clock (φ) is also sent to the IC card (CD).

Next, the above routine of [SO3] will be explained with reference to FIG.

First, interrupts of (INT,) to this flow are prohibited (1400). This is because if the interrupt (INT) shown in FIG. 3 occurs during the main control, the control will not proceed further. Next, at (1405) the microcomputer (μ
C) terminal (4) is set to “H” level, and the inverter (I
By applying a low level to the base of the PNP transistor (Try) via N + ), the transistor (Try) supplies power to the ONL, photometric circuit (LM), AF circuit (AF, A), etc. Next, the lens circuit (L
Enter the information specific to the interchangeable lens from E) (11410
).

This is shown in FIG. 7 and explained. First, the terminal (C3LE
) as r)i, level #600), perform serial communication and input information from the lens (1605). Figure 36 shows the circuit inside the lens. The clock input from the camera is input to the decoder (2 ) to create an address signal. At this time, when the predetermined address is reached, the lens data that changes depending on the zoom,
Or, because the lens data changes depending on the distance,
The encoders (3) and (4) detect the focal length and distance, and the address circuit (5) changes the address depending on the focal length or distance, and outputs predetermined data to the camera body. I'll do what I do. The switch (SQ) is a lens-side switch (see FIG. 37) provided on the lens (10), and since the data must be changed by this as well, the address is changed. The address thus set is output to the ROM. ROM (6) outputs data based on the designated address. This output is converted into a serial signal by a parallel-to-serial converter circuit (7) and is applied to the camera body.

Next, lens information will be explained. As shown in Table 12, the lens information sent to the camera body includes the lens attachment signal, the lens's maximum aperture value (Avo), the lens's maximum aperture value (AvMAX), distance information, focal length information, (lens Drive amount/defocus amount) conversion coefficient.

These include ON/OFF of the lens side switch (SQ) and information indicating whether or not to drive the lens (LOK), etc., and are input to the RAM at the address in the body shown in the table. The signal (LOK) is not particularly relevant on the camera body side in this embodiment, but the address is switched when the state becomes such that AF cannot be performed, and the signal changes from "1" to "0" accordingly. . If AF is always possible, select “1”.
” and does not require 2 bytes. The camera body receives this signal and stops the motor.

On the other hand, on the lens (10) side, the RO as shown in Table 10
M and address configuration. (A), (B)
stores two similar pieces of data in the same ROM that differ only in the 39 relationship and the LOK relationship.

Conventionally, lens information has been relatively small, and a plurality of types of lens information with the same function can be stored in one ROM, and the lens information can be switched depending on the lens used. In this case, the amount of information per lens is fixed, and the required ROM is determined accordingly. In such a case, creating (increasing) new data indicating that the switch is ON or OFF means changing the address and changing the data in the ROM according to the ON or OFF of the switch. 2 bytes (ON, 0
FF) is required. RO per type
If there is a margin in M, 06. as shown in Table 11. ,0
Add 2 bytes of 8H and set the lens side switch (S
Change the address according to OFF or ON of o) 06M,
However, if there is no such margin, as shown in Table 10, the ROM C provided for multiple types (in this embodiment, (B)) can be turned ON and OFF. Assuming that the data other than the data changed by
) or (B). However, in this case, there are only a few types of lenses that can be used with this ROM.
In the case of 06N and 07. Conversely, if it is ON, t6M and 17n (F motor stop to bo-0) will be sent. Note that (xxx) in the address indicates address data that changes depending on zoom or distance, and is input from encoders (3) and (4).

The signal (LOK) in the lens indicates that the lens is not for AF. Upon receiving this signal, the camera body side prohibits AF operation (lens drive) and performs only focus detection operation.

Table 1O shows lenses that can always perform AF operation. For example, some zoom lenses with macro features do not allow AF operation when in macro mode, and AF operation is prohibited for such lenses. K's bo = 0 (This will become worse when the address is changed or the ROM is switched.)
and enables AF operation when not in macro mode.

8 bo=1.

Now, even when a lens that has the function of the above switch (So) is attached to an old camera that does not read this bit (because it is new data), it will still have the function of this lens side switch (S,). When attempting to
(Since the card is not an old camera, this cannot be done, and only focus lock is possible.) If the LOK signal is disabled from AF in response to the above switch (S9) being turned on, the old camera is considered to be a lens that cannot be AFed. In Table 10, when the switch (So) is turned on to prohibit the AF operation and perform only focus detection, the value is A in Table 10.

In Table 11, 08N, 09. , and switch (S,
) is OFF, B in Table 10 and 0 in Table 11
6□, 07. All you have to do is change them.

Regarding the control on the old camera side, it is only necessary to determine whether or not to inhibit AF when reading the lens data, and to control whether or not to inhibit AF, so a description with reference to the drawings will be omitted.

After entering the lens information described above, the terminal (C5
LE) is set to "L" level and returns (#610).

Returning to FIG. 6, the microcomputer (μC) continues to input electronic flash device information from the electronic flash device (ST) (14
15) The information includes a guide number (GN) indicating the amount of light emitted and whether or not the battery is fully charged.

There are three types of information: forced light emission or automatic light emission (this will be described later). Here, the operation of the information communication method will be explained. Incidentally, FIG. 9(a) shows a circuit diagram of the electronic flash bag W (ST), and FIG. 9(b) shows a circuit diagram of the interface (IF).

First, the microcomputer (μC) has a terminal (CSS
T) is set to rH level for a certain period of time (t,), and this signal is output to an electronic flash device (ST). Electronic flash device (
ST) detects the time (1+) of this signal, recognizes the data output mode, and outputs data in accordance with the clock from the microcomputer (μC).

In the interface circuit (IF) shown in FIG. 9(b), the signal of the terminal (C5ST) of the microcomputer (μC) is passed through the OR circuit (oRr+) to the terminal (ST, ST,
). At this time, the signals input to the OR circuit (OR1,) are both at the "L" level. In the electronic flash device (ST), a signal from the terminal (ST + ) is input to the AND circuit (AND++), so the AND circuit (AND■) becomes active and the oscillation circuit (O20
) is output to the counter (CNT, □).

The counter counts this and measures the time (t,).

When the time (tl) is counted, the terminal (Tl) is set to r) (J level, and the RS flip-flops (SR, , ) are set.

At this time, the RS flip-flop (SR, □) remains reset, and its output page is at rH, level. Therefore, the AND circuit (AND□) becomes active.

Next, the microcontroller (μC) uses a serial communication clock (
SCK). This clock (SCK) is output to the terminal (ST, ) of the electronic flash device (ST) via the OR circuit (OR21) of the interface circuit (IF). In an electronic flash device (ST), an input clock (SCK) is input to a clock terminal of a parallel/serial conversion circuit (P/S) via an AND circuit (AND, □). This parallel/serial conversion circuit (P/S) outputs a guide number (GN), a signal 1 indicating a charging completion state, and a signal indicating forced light emission or automatic light emission in synchronization with the clock. Electronic flash device (ST) counter (CNT)
I+) counts the input clock (SCK), and when a predetermined required number is counted, it outputs the "■1" level to the OR circuit (OR11). This signal is an OR circuit (O
R++) is input to the reset terminal of the counter (CNTI2) via the one-shot circuit (OSll), and the counter is reset. The counter (CNTth) is a counter that is reset after counting a predetermined number of clocks.

In addition to the above-mentioned circuit elements, the electronic flash device includes a battery (E3T) as a power source, a booster circuit (UV) for boosting the voltage of the 38-cell battery to the voltage required for flashlight emission, and a voltage booster from the booster circuit (UV). A rectifier diode (D) that rectifies the output voltage, a main capacitor (MC) that stores the energy necessary for flash light emission, and a main capacitor (M
C) Charging voltage detection circuit (CVD) that detects the charging voltage
, a light emission control circuit (FC) that controls the start and stop of light emission.
C).

Returning to FIG. 6, the AF mode is determined in step (1417). This subroutine for determining the AF mode is shown in FIG. 6(a). First, from the lens information, it is determined whether the above-mentioned lens side switch (S,) is turned on (
14000), if this switch is ON, the TAm holding time must be reset/started (starts from 10 seconds), and the flag (OFF) is set in step (14005).
), then read the information from E"FROM and check whether the AF mode set by the IC card is the focus lock mode (14010).
Judge by. Here, if the focus lock mode is selected (MSbza, 1t=1, 1), the bit indicating this (Fb14) is set, the bit indicating the auxiliary light mode (Fb, 3) is reset, and the tracking mode is displayed. When it is on, turn it off (14020~
114030).

This is because in the focus lock mode, since the AF operation is prohibited, no further AF operation is required, and therefore the emission of the auxiliary light required for this is prohibited and the power is dissipated.

The tracking display is also wasteful since the lens is not driven and the tracking operation cannot be performed after the focus is locked, so the tracking flag is reset and turned off.

Next, determine whether the AF mode set by the IC card (CD) is spot AF (#4035)
, to this step (#4035), follow the above step (#4035).
4010), it also occurs when the focus lock mode is not in effect. Here, if spot AF is used (MSbz
b, zt=0.1), switch (I9) is turned on,
A flag indicating that this flow has passed for the first time (SQON
Step (14036) determines whether or not F) is set.
), and if it is not set, step (14
Step 037), in order to memorize the multi-point/spot mode before the switch (So) is turned on, move the contents of bit (FbA) to via )(Fb+s), and proceed to step (+14).
Proceed to 040). If the flag (SQONF) is set, step (+14037) is skipped and the process proceeds to step (114040). Step (14
040), set the bit (Fb2) indicating spot AF and display this mode (, Regardless of the IC card selection, set the multi-point/spot display flag at step (+14042) and proceed to step ( 114045
). Spot A in step (14035)
If it is not F, skip steps (14036 to 14042) and proceed to step (114045). In step (114045), it is determined whether continuous AF is selected, and if continuous AF is present (MSbza , zt=L O), the bit indicating this (F
bs"1) (114050), reset the bit (Fb13) indicating the auxiliary light in step (+14055), and set the flag (SQ) indicating that this flow has passed.
ONF) is set in step (14057) and the process returns. It is now assumed that the auxiliary light mode for continuous AF is prohibited in consideration of power saving. With continuous AF, where focus detection never ends, if the auxiliary light is emitted every time focus detection (integration) is performed, the battery, which is the power source, will wear out quickly and the number of films that can be shot will decrease. It is.

If it is not continuous AF in step (14045), proceed to step (+14057) and flag (SQ
ONF) and return. In addition, the switch (S
, ) is on, focus lock, spot AF, continuous AF can be used with an IC card.
For example, if step (14010) is the focus lock, steps (14035) and (114045) are set.
), the answer is NO.

In step (14000) above, switch on the lens side (S
o) is OFF, the process advances to step (14060).

In this step (t4060), the bit (Fb+a) indicating the focus lock function is reset.

Next, in step (14061), it is determined whether there is any setting for spot AF/multi-point AF using the IC card (CD), and if there is no setting, multi-point/multi-point AF/multi-point AF is set to erase the multi-point/spot display.
The spot display flag is reset (I4062), and it is determined in step (114063) whether the switch (So) has changed from ON to OFF, and if it has turned OFF (SQONF-1), the switch (SQ) is ON
In step (114064), the contents of bits (Fb, .) are transferred to bit (Fb2) in order to shift to the previous multi-point/spot AF mode. Switch (So) goes from ON to OFF
If it is not F (SQONF=O), it is assumed that this flow has passed while the switch (SO) is OFF, and step (+14064) is skipped. In either case, the process proceeds to step (14080).

If it is determined in the above step (+14061) that the setting is set, step (1406
Step to 5) and set the multi-point/spot display flag.Next, in step (+14067) it is determined whether it is spot AF, and if it is spot AF, the bit indicating this (Fbri) is set in step (+14070). Set, A
If it is not the F spot, this bit (pb,) is reset in step (It4075) (that is, multi-point AF is set), and the process proceeds to step (114080). In step (I4080), it is determined whether there is no one-shot AF/continuous AF setting,
If not, proceed to step (114090) and set pbs=0
(One-shot AF) and step (It4097
), if there is a setting, it is determined whether it is one-shot AF in step (14085), and if it is one-shot AF, the bit (Fb+) is reset to indicate this in step (14090), otherwise For example, in step (114095), the bit is sent (i.e. as continuous AF), and then the bit is sent to the next step (114095).
4097), the flag (SQONF) is reset and the process returns.

Returning to FIG. 6, after the microcomputer (μC) determines the AF mode described above, it performs card data communication I with the IC card (CD) in order to determine the type of the IC card (CD).
1420). Since this card data communication (2) has already been explained with reference to FIG. 5, the explanation will be omitted here. After the card data communication, a flag (S
(ETF) is set or not (#425), and if it is not set, press the AF start switch (
SL) is turned on or not based on the level of the terminal (IP6) (#427). The above switch (Sl
) is turned on (IP.

= "L" level), performs AF control (Shadow 429),
- On the other hand, when the flag (SETF) indicating the data setting mode is set or the switch (S+) is set to 0F.
When F (IP, = 'HJ level), in order to prohibit AF operation, a signal to stop the AF drive motor is output to the lens control circuit (LECN) to stop the lens drive. The data setting mode is set in this way by setting the flag (AFNF) indicating that the switch (S, ) is not set to the center (1435), and resetting the flag (S, 0NF) indicating that the switch (S, ) is ON (1437). By prohibiting AF control and giving priority to data setting when the camera is in use, the AF operation is prevented from being performed even if the AF start switch (Sl) is accidentally pressed during data setting.

Here, regarding the above-mentioned AF control, FIGS. 10(a) to 1
The flowchart shown in FIG. 0(f) will be explained with reference to FIG. 11 showing the focus detection range in the drawing screen. At that time, the photometry range will also be explained.

First, in FIG. 11, the outer rectangle 02) indicates the photographing screen. Among them, (LMI) to (LM4) indicate the photometry range, and (API) to (AF3) indicate the focus detection range.

Regarding the focus detection range, the camera has a spot/focus detection range.
Multi-point AF can be switched, and when spot AF is selected, AF is performed based on subject information in the focus detection range (Ah), and when multi-point AF is selected,
AF is performed to focus on the subject closest to the camera from among the three ranges (API) to (AF3). Below, (API) is the first island, (^Ft)
will be called the second island, and (AF3) will be called the third island.

To explain the AF control shown in the flowchart of FIG. 10(a), first, in order to detect whether the AF start switch (S+) is pressed for the first time, the flag (S, 0NF) is determined and set. If it is not pressed, it is assumed that it is pressed for the first time, and a flag (A
FEF) and proceeds to step (+1705). If it is set, the process directly proceeds to step (+1705) without passing through step (11702), and it is determined whether the lens is attached based on the input signal from the lens (11705). If the lens is not attached in step (a705), a flag (AFNF) indicating that AF is not being performed is set and the process returns (11800).

If a lens is attached, focus adjustment mode is A.
Connect the terminal (IP+o) to determine whether it is F mode or M mode.
(11710), and when the AF mode is selected, it is determined by the bit (Fb, ) whether the focus lock mode is selected in step (1711). When in M mode, step (s79
After disabling the auxiliary light mode (Fb+350) in step 8) and executing the manual focus subroutine (MFOCUS) in the next step (+1799), set the flag (AFNF) indicating that AF is not being performed ( 1
800), the process proceeds to step (11780) and it is determined whether or not focus is achieved. If the image is in focus, a flag (8FEF) is set; if the image is not in focus, the flag (AFEF) is reset and the process returns.

This manual focus subroutine is shown in Figure 10 (
As shown and explained in d), first, a flag (MFF) indicating manual focus is set, and integration control is performed to control integration and execute data dump.

In manual focus, a flag indicating the second island of the three islands in the AF area (AF
2F), calculates the day focus amount (OF) of this island, uses this as the day focus amount, and returns (114100 to 114110).

The integral control subroutine in the above step (114101) is shown in FIGS. Performs integration without emitting auxiliary light, dumps data after completion of integration, and returns (114150.114155.114
165.114170), when the focus is not undetectable,
In addition, when in the auxiliary light mode, the terminal (OLD) is set to the r 11 J level for a certain period of time in order to emit light before the start of integration and emit light for a certain period of time, and then performs integration (1415
0-14170).

Returning to FIG. 10(a), if the result of the determination in steps (11710) and (11711) is that focus lock is selected in the AF mode, step (1171) is selected.
Stop the lens drive in step 2) and judge whether the focus is achieved by checking whether the flag (AFEF) is set.1171
3), when set, step (+171
Proceed to step 4), control the M focus, and step (@
'780).

If not set, proceed to step (11799). The reason for determining focus here is that if the focus is locked after focusing, you want to use the distance data of the subject at the time of focus (used for image magnification) to determine the photometric value. It is.

After determining AF in step (11710) in FIG. 10(a) and locking the focus in the next step (1711), the flag (AFNF) indicating that AF is not being performed is reset in step (+1715). At the same time, a flag (MFF) indicating manual focus is reset in step (+1717). Microcomputer (μC
) controls the accumulation (integration) of charges generated according to the amount of incident light in the COD for distance measurement, and after the integration is completed, inputs the data obtained by digitally converting the integral value (172
0). Then, in step (#730), it is detected whether it is spot AF or not (detected by Fb! of the function data), and if it is spot AF (Fbz = 1), step (+1
735) and switch to sub-1-AF shown in Figure 10(d).
Execute the subroutine. In this subroutine, the second
Based on the island, a flag (AP2F) indicating that AF is being performed is set, and the day focus amount (DF) of the second island is calculated from the input data, and this is used as the day focus amount for lens driving. (11410
2~+14110).

On the other hand, when multi-point AF-1-1 is selected in step (11730) of FIG. 10(a), step (11730) is selected.
1740) and normal AF@ shown in Figure 10 (C).
Execute subroutine II. At that time, 1. Second.
Calculate the day focus I (DF) of the third island, and calculate the day focus amount for the subject closest to the camera among the above (114200 to 114215)
.

The subroutine for determining the day focus amount is shown in FIG. If the object is closer to the camera than the focus position of the lens), it indicates a positive day focus amount, and its absolute value indicates the size of the day focus.To detect the subject closest to the camera, three islands are It is sufficient to detect the maximum (including positive and negative) day focus amount among the day focus amounts (the main subject is considered to exist in the focus detection area).

In Figure 10), the microcomputer (μC) first resets the flags (AFIF-AF3F) indicating the island,
The largest day focus island is detected, the detected island day focus amount is set as the day focus amount for lens driving, and the flag (A) is set according to the island.
FIF-AF3F) and return (181
0-1865).

After calculating the day focus amount, it is checked in step (11745) of FIG. (For example, focus detection is disabled) If focus detection is not possible, the process proceeds to step (11747) to determine whether or not the mode is auxiliary light mode. If it is in auxiliary light mode, no further focus detection is performed. Since it is wasteful, a flag (LCONF) indicating this is set (#752), a flag indicating the follow mode (described later) is reset (11755), and the process returns. At step (+1747), if the auxiliary light mode is not selected, the process advances to step (11757) to detect whether or not the brightness is low. ) and perform the same process as above.

On the other hand, when the brightness is low, step (11760) sets the auxiliary light mode (Fb+ffi・1) to step (11760).
11755).

Next, if the microcomputer (μC) is not unable to detect the focus,
The flag (LCONF) should be reset (+1762), and in step (#765) it is determined whether the lens is in focus based on the day focus amount for lens driving, and if it is in focus, the flag (AFEF) indicating the in-focus state should be set. 1767) and set the flag (AFEtF) to step (1755).
Proceed to.

If the focus is not in step (#765), step (#765)
+1775) to execute a subroutine for lens drive control, and then return. This subroutine is the 10th subroutine.
The explanation shown in Figure (e) is one-shot AF (once focus is achieved, subsequent lens driving is stopped, and focus detection may also be stopped at this time), continuous AF (
The data (Fbs) indicates whether the lens follows the subject even after focusing and drives the lens according to the determined day focus amount.
(I4250), in the case of one-shot AF (pbs=o), it is determined whether the flag (AFEF) indicating focus is set or not (I4255), and if it is not set, or In the case of AS AF (Fbs = 1), step (14327),
The process proceeds to step (14340) via step (14330), and lens drive is controlled. Step (114327)
In step (+14330), the flag (AFEF) indicating focus is reset, and the lens drive amount (N) is set as follows.
The day focus I (OF) is calculated by multiplying by the value, the lens is driven in step (14340), and the process returns. The lens driving in this step (+14340) is performed by the lens driving circuit (LECN) driving the lens by a value corresponding to the driving amount (N).

In step (14255), when the flag (AFEF) indicating that the focus is set is set, the process proceeds to step (14260), and whether the flag (AFEIF) indicating that the focus has been achieved from the out-of-focus state is set is determined. Determine. When set, preparation processing for tracking determination (determining whether the subject is moving), which will be described later, is performed. First, in step (14265), a register (Dh) for storing the day focus amount, (DF
3), and store the obtained day focus amount (DF) in the same register (DFl) (14270
), set the variable (N) to 0 (14275), reset the above (AFEIF) (+14280), and return.

In step (14260), after focusing (AFEF=
1) When performing focus detection from the second time onwards (AFEIF=
O), proceed to step (14285), and sequentially memorize the day focus amount in the register that stores the day focus amount (the contents of the register (Dh) are stored in the register (D
F3), the contents of the register (DP I) are transferred to the register (
DF2), store the obtained day focus fi (OF) in the register (DP I>)] Set 1 to the variable (N)
is added, and it is determined whether this (N) is 2 or more, that is, whether focus detection has been performed three times after focusing, and if it is within two times, the lens is not driven and returns (14285 to 14305).

In step (+14305), if it has been performed three times or more (N≧2), the process advances to step (14310) and the day focus amount is calculated using the average of the past three day focus amounts (the average of the contents stored in the register). Find the focus amount,
In the next step (+14315), it is determined whether this value is greater than or equal to a predetermined value. This means that it has been determined in the past three focus detections whether the subject is moving at a predetermined speed (on the image plane). When the value is less than the predetermined value, it is assumed that the subject is not moving, and the tracking flag is set (+1
4320), returns.

This flag is used for display (infinder). On the other hand, when the day focus amount is more than a predetermined value,
When the subject is moving, the flag (
Follow F) should be set (14325), and step (1
4327) to reset the focus display flag (focus F) (this is done because the subject is already moving) and set the lens drive amount to the day focus amount (lens Multiply the driving amount/day focus), drive the lens, and return (14330.1143
40).

Here, the display in the finder regarding focus detection will be explained based on the display in the finder shown in FIG. When set based on F), the green LED lights up, and otherwise (focus F=0) turns off. Further, when the focus cannot be detected (LCONF=1), the red LED is blinked, and when it is not (LCONF=0), it is turned off. (102) indicates a focus detection area, and when the inner area (102) is displayed, it indicates spot AF, and when only the outer area (102b) is displayed, it indicates multi-point distance measurement. (103) is continuous mode,
Alternatively, it is displayed when the tracking mode is indicated (tracking F=1), and is turned off when the continuous AF and tracking mode are not selected. rAF/Ml of (104) is AF display when in AF mode (AFNF=0), and in other cases (A
FNF=1) performs M display. In addition, AF switch (So
When is OFF (S + OFF・0), the display in the viewfinder is turned off.

Returning to FIG. 6 again, the microcomputer (μC) controls changes to various data by operating various key switches (1440).

This is shown and explained in FIG. 12. First, the state of each key switch is n! and stores it in memory (1900).

Next, set the flag (SET) indicating that the card is in card setting mode.
It is determined in step (1905) whether F) is set, and if the flag (SETF) is set, the process advances to step (+1945). If the flag (SRTF) is not set, the process advances to step (11910) to determine whether the exposure mode change switch (So) is turned on. Here, the switch (So) is turned on.
When the change subroutine (119
Proceed to step 15) and return (details will be described later). If the above switch (St*) is not turned on, proceed to step (1920) and turn on the function change switch (SFLIN).
is turned on. When this switch (SFLIN) is turned on, the process proceeds to a subroutine for changing the change (1925) and returns.

Here, the above two subroutines are shown and explained in FIGS. 13 and 14, respectively. First, the exposure mode is changed.
Each time the up switch (Sup) is turned on, the process progresses cyclically from P-4A→S→M and then back to P, and each time the down switch (Sdn) is turned on, the process progresses sequentially to P4. -A4-54-M, and after P, it moves cyclically in the opposite direction to the up direction, but the exposure mode is set by the IC card (CD). The mode will be changed accordingly, and unselected modes will be skipped.

To explain this with reference to FIG.
) is the up switch (
It is determined whether Sup) is turned on, and if it is not turned on, the process advances to step (11055). If it is ON, proceed to step (11005) and RA
Functional data of M (Fbn) (Fbo) (Fb+)
to determine whether P mode is currently selected as the control exposure mode, and if so, step (
111010) and check whether A mode is selected by the rc card or not (MSb,) of the internal E”FROM.
(MSb8) (see Table 4) and if selected, changes the exposure mode from P to A, and changes the function data (
Change Fbo, Fb+) from (0, 0) to (0, 1) and return (+11015). The above step (110
10), when it is determined that A mode is not selected by the IC card, step (+1102
Proceed to step 5) to determine whether S mode is selected, and if S mode is not selected, proceed to step (11040) to check if M mode is selected, and if it is selected by the card sequentially. Search for mode.

Then, if there is a selected mode, it is set. Then, when the A, S, and M modes are not selected, that is, when only the P mode is selected, the P mode is selected (11050).

Similarly, when A mode is selected as the full control exposure mode (Fbo, Fb+ = 0, 1), I
Determines whether S mode is selected by the C card, or if M mode is not selected, changes the exposure mode to the selected mode, and selects the bit (
pbo), (pb+) and return (110
20-1030).

Now, when S mode is selected as the control exposure mode (Fbo, Fb+ = 1.1), it is determined whether M mode is selected by the IC card, and if it is selected, it is set to M mode and selected. If not, switch to P mode and return (111035-110)
45), when the control exposure mode is not S mode, that is, M
mode, the mode then becomes P mode. This is because the P mode is always selected in this embodiment.

In step (111055), the down switch (S
dn) is turned on, the same control as the up switch (Sup) described above is performed, except that the direction of changing the exposure mode is different, so a description thereof will be omitted.

In addition, both switches (Sup) (Sdn) are OFF.
If F, do nothing and return.

Next, the function change switch (SFLI) shown in FIG.
The control when N) is turned on will be explained. Microcomputer (μ
C) has the four functions mentioned above, namely, highlight/shadow (H/S), exposure compensation (+/-), single shooting/continuous shooting (S).
/C), Spot AF/Multi-point AF (S/A) Check whether at least one of them is selected using the E"FROM bit.
(MSb, ~MSbz), and if none of these bits are set, it is determined that there is no mode selection and returns (111200). If at least one is set, it is assumed that at least one mode is selected, and the step to change data (11
1205) The subsequent flow is executed. Microcomputer (μC)
determines whether the switch (S,) indicating the function to be changed is turned on, and if it is turned on, the function to be changed is H/S→÷/−→S/C−+S/ Proceed to A,
The process progresses cyclically, returning to H/S after S/A, but if no function is selected by the IC card, it is skipped over.

In step (11210), if the function to be changed now indicates H/S mode (RAi
Data CDb6. CDbl, CDbZ=O, 0, 0)
, 10/- mode is selected by the IC card at step (11215) f! ”PROM bit (M
Sb + ), and when +/- mode is selected, the data change mode is set to +/- mode, and data CDb, ~CDb! =0°0.1 and returns (I1220). If +/- mode is not selected, proceed to step (+11227) and determine whether S/C mode is selected by (MSbz), and if this is also not selected (MSb2=0). Proceeding to step (111240), it is determined by (MSbi) whether the A/S mode is selected, and if it is not selected (MSbs-0), further step (111
250) to determine whether H/S mode is selected (MSbo) - At least H/S mode is selected now, so in order to change the H/S mode function
, CDb, ~cobz=o, o, o. S/C mode.

When the A/S mode is selected, CDb6 to CDbt are set to change this mode.

Similarly, the next mode (
+7- mode for H/S mode, S/ for 10/- mode
C mode, S/C mode, S/^ mode, S/A
If mode, H/S mode) is selected by the card, if selected, change mode is set to next mode, if not selected, II/S→+/-
→ IC in order of S/C-S/A-+H/S-...
Search for the function selected by the card, and use data CDba to CDb as the function to change the selected function.
Set t and return.

As can be seen, modes not previously selected by a card will be skipped over with respect to the change mode. For example, if the selected changeable mode is +/- and S/C
function change switch (SFtI, l)
When is pressed, the flow goes to step (s1225), which then goes to step (111227) where the S/C mode becomes the mode to be changed. In terms of display,
0 which means the cursor moves from +/- to S/C Next, when the function change switch (SFIJN) is pressed again, the flow goes to step (#1235) and from here step (111240) → ( 11250) → (11
215), 10/- becomes the mode to be changed, and the cursor on the display moves to +/-. In these cases, H
Since the /S mode and the A/S mode are not selected, they are essentially skipped in terms of setting the change mode.

In step (111205), switch (Sst
) is not ON, step (11265)
Proceed to.

In step (11265), the up switch (Sup)
Determine whether the function is turned on, and if it is turned on, write data (CDb, ~
CDbg), and if it is H/S mode, all set modes are determined by data (Fb &) (pbt), and cyclically proceeds to the next mode (→H-+ S + No H/S). ), data (Fb &)
, (Fb,) should be set 11270.111275
), return.

If the function is in the 10/- mode (H285), 0.5 is added to the exposure compensation amount (AEv), and the process proceeds to a subroutine (11287) for determining the amount. This subroutine is shown in FIG. 14(b). However, it is corrected! If (AEv) is positive, data Fbi, Fbs is set to ``0,1'' as + side correction, and data Fb4.Fbs-1,0 is set as - side correction.
Further, if the correction is zero, no correction is assumed and data Fb4. Return with Fbs = 0.0 (11
350~#1370).

Returning to Fig. 14 (a), if it is S/C mode, it is determined whether the current mode is single shooting (S) or continuous shooting based on the data (Fbs), and the mode is set to be the opposite of the current mode. Change the data (11295) and return. When the mode is not one of the above three modes (l/S mode, 10/- mode, S/C mode), that is, S/A mode, the current mode is set to AF (S) or multi-point AP ( A
) is determined by the data (Fbg), and the data (Fbz) is changed so that it is opposite to the current mode.
1300), return.

In step (11265), the up switch (Su
p) is not turned on, the process advances to step (11305), and it is determined whether the down switch (Sdn) is turned on, and if it is not turned on, the process returns. ON
If the mode in H/S mode is changed, the order of change must be reversed (←H4-34-No H/S←), and if it is +7- mode, the exposure compensation amount must be changed. Except for subtracting 0.5Ev from (AEv), the flow is the same as when the up switch (Sup) is ON, so the explanation will be omitted (111310 to #1340)
.

Returning to Figure 12, exposure mode change switch (S!, 4)
.

If both function change switches (SFLIN) are OFF, the up switch (Sup) and down switch (S
dn), aperture value (Av), shutter speed (Tv
) The process advances to step (1927) which shows a subroutine for changing.

This subroutine is shown in FIGS. 21(a) and 21(b). To explain it, first, the microcomputer (μC)
Step (111800) determines whether p) is ON or not.
), and if it is not turned on, step (-18
The process proceeds to step 05) and determines whether or not the down switch (Sdn) is turned on. If it is not turned on, the process returns. When the up switch (Sup) is turned on,
Step (+11800) to Step (+11810
) to determine whether the mode is M mode. Here M
mode (Fbo, Ftz = 1.O), proceed to step (11811) and check whether the mode is M (shutter speed can be changed only by operating the up and down switches) using the bit in E"FROM. (MSbis), and if it is M mode, (MSbzs・0),
In the next step (111821), the aperture change switch (S
ay) is turned on, and if it is turned on (IP+3"""L"), go to step (11830) to change the aperture; if not turned on (IP13=
rH”), step (1) to change the shutter speed.
11823), first explain how to change the shutter speed, and then explain whether this speed change is done in AEv increments or IEv increments.
11823) if the km rotation is judged, and if it is 'A E v setting mode (MSJqJ), step (11850)
), 0.5 is added to the current shutter speed (Tv), and the process further moves to step (111855). On the other hand, when performing in IEv increments (?ISb!9.0), the current shutter speed is set to E V in step (11824).
/2, and set the set value of Ev/2 [for example, T
0.5 of V-6,5 (SS=1/90)], in step (11825) add 0.5Ev to it [Tv
=6゜5 →Tv-7(SS =1/90 →SS!1/
120)), IEv unit, and further add IF5 to this value in step (111826) to obtain step (1185).
In step (11855) proceeding to 5), it is determined whether or not the set shutter speed exceeds the maximum speed (7vmax), and only if it exceeds, the shutter speed is limited to the maximum speed (11860), and the process returns. If it does not exceed
Skip step (11860) and return.

In step (11821), the aperture change switch (
SAv) is ON, the aperture value change mode is assumed, and the aperture value (Av
) and 0.5Ev, which is the maximum controllable aperture (
It is determined whether the value exceeds llI(Ava+ax) (+11835). If it exceeds the aperture value (Av
) to set the maximum aperture (i (Avmax))11
1840), if it has not exceeded, do nothing and proceed to step m845) to determine whether or not it is in P mode,
If the mode is P, the process advances to step ($1879) of the flowchart shown in FIG. 21. If the mode is not the P mode, the process returns. In step (11811),
M, when not in mode (MSbzs・1), step (
11822), it is determined whether or not the aperture change switch (Sav) is turned on. If it is turned on, the shutter speed is changed and the process goes to step (11823). If it is not turned on, the aperture is changed and the process goes to step (11823). (183 years ago
Proceed to 0).

If it is not the M mode in step (111810), it is sequentially determined whether the mode is P mode or A mode in steps (+11815) and (11820), and the mode is set to P mode.

Either mode A (Fbo, Fbl = 0.0
or 0°1), proceed to step (111830) and perform up control of the aperture value (Av), and if neither, that is, S mode (Fb@, Fbl -LL
) proceeds to step (#1823) and the shutter speed (T
v)).

When the down switch (Sdn) is turned on in step (11805), step (+
11865), determines whether the mode is M mode,
When in M mode (Fb Yu, Fbl = 1.0),
Proceeding to step (+11876), it is determined whether or not it is M1 mode, and if it is M mode (MSb・0),
Determine whether the aperture change switch (SAv) is ON ($1877). If it is ON, go to step (111885) to change the aperture; if not, go to step (11879) to change the shutter speed.
In step (s1879), it is determined whether or not the setting mode is in %Bv increments, and if it is in y2Ev increments (MSbtq・1), step (+11905)
Proceed to , subtract 0.5Ev from the set shutter speed, and determine whether this is slower than the camera's minimum shutter speed (Tvmin) (+11907), and if it is slower, limit it to the minimum shutter speed (111908), then If not, return without doing anything. If it is in 1Ev increments (MSb*qJ), determine whether the current setting value is in %Ev units, and if it is in %Ev units, 0.5Ev
Add 1. from the added value. Subtract OEv and return (11880 to 11882), step (11880
), if y2E is not in v units, then step (1
11882) and from this value, 1. Subtract OEv and proceed to step (1907), step (111877)
When the aperture change mode is determined by (SAIION)
, in step (11885), the aperture value (Av) is decreased by 0.5Ev, and then in step (11890
), it is determined whether the value is smaller than the open aperture value (Avo), and if it is, the aperture value is set as the open aperture value (AvJ) (11895).

Next, step (111900) determines whether it is in P mode or not.
) to judge. In step (++t890), if the aperture value (Av) is not smaller than the open aperture value (Avo), step (t1895) is skipped and step (111900) is entered. This step (1190
If it is P mode in the judgment of 0), the above-mentioned Fig. 21(a)
Control flow for increasing the aperture value (11823 to cloud 186
0), and if not in P mode, return.

In step (111876), if it is not M1 mode, (MSbxs・1) step (111878)
The process proceeds to step (111879) to determine whether the aperture change switch (SAV) is turned on, and if it is turned on, the process proceeds to step (111879) to change the shutter speed.
If it is not set to N, step (
11885).

In step (*1865), if it is not M mode, step (11870) and (1875) are sequentially set to P.
It is determined whether the mode is P mode or A mode, and if it is P mode or A mode, step (+11885
), proceed to the flow for controlling the aperture value reduction, and if not, proceed to step (#18) assuming that the S mode is in effect.
79), the shutter speed is controlled to be lowered.

Returning to FIG. 12, after passing through step (1927) showing the subroutine for changing the aperture value (Av) and shutter speed (Tv) described above, the process proceeds to step (1930). This step (1930) includes a normally open switch (S) that enables or disables the functions configured by the card.
CD) is turned on, and if it is turned on, the process proceeds to step (1935), a subroutine for card function activation and invalidation switch ON (Scn ON).

This is shown in FIG. 15 and will be explained. First, step (11
400), it is determined whether or not the IC card (CD) is loaded in the camera based on the data (Ckbo), and the IC
If no card is loaded (Ckbo = 0), return immediately. When the mode setting card is loaded, the card function enable/disable switch (SCD) is operated and a flag (C
DF) is set (1114
05). If it is set, it is assumed that the valid/invalid switching has already been completed during the operation and the process returns. If it is not set, proceed to the next step (11).
Step 1410) sets this flag (CDF), and then in step (11415) it determines the flag (CDFNF) indicating whether the card function is valid/invalid, and if it is not set, sets it to enable the card function. +11420), if set, reset and disable the card function (+11425), then return.

The flow when the card function enable/disable switch (SCO) is ON in the determination at step (11930) in FIG. 12 was explained above in accordance with FIG. /When the invalid switch (Sco) is OFF, step (119)
Proceed to step 40).

To explain the flow of this step (+1940) with reference to FIG. 16, first, in step (+11450), the IC
Determine whether the card is installed or not, and if the IC card is not installed, 20H (bo = 0) returns,
20H (bo=1) when the IC card is loaded
The process proceeds to step (11455) and determines whether or not a flag (CDF) indicating that the flow after step (111405) in FIG. 15 described above has been set is set. If the flag (CDF) is not set, the process resets it and returns in the next step (111460). If the flag (CDF) is not set, the process returns directly.

Returning to Fig. 12, the microcomputer (μC) next steps (1
1945), a normally open switch (
SCDS) is determined to be ON or OFF, and if it is ON or OFF, the process returns through steps (+1955) and (+1950) related to the control of the respective subroutines. This will be illustrated and explained in FIGS. 17 and 18.

First, Figure 17 shows the subroutine when the switch (Sc++s) is turned on, and the microcomputer (μC
) determines whether the mode setting card is installed in step (11500), and if the card is not installed (b*=o in 20H), returns immediately. If the mode setting card is installed (b in 20□)
x-1), it is necessary to determine whether a flag (CDSF) indicating that this flow has passed once is set.
10) If it is not set, set it (111515); if it is set, skip step (11515) and return.

Next, the O of the switch (SCD3) shown in FIG.
To explain the FF subroutine, first step (111550) checks whether the mode setting card is installed.
If it is not attached (bz of 2ON = 0), return. If installed (20M bz
-t), the flag (CDSF ) is not set, returns (11555), and when the flag (CDSF) is set, the switch (Scos
) is turned ON or OFF, and in order to determine which of these, a flag (S) indicating the data setting mode is set.
ETF) is set (115
60). As a result, if it is determined that the flag (Sll!TF) is set, the flag (Sll!TF) is set in step (115).
70), and then in step (11572) the flag (WRT
F) and the data setting mode has been canceled by operating the switch (ScDs), step (
11575) to reset the flag (CDSF) and cancel the data setting mode. If it is not set, this flag (
SETF) is set (u565), and the flag (
CDSF) (111575) and return.

After completing the key setting control shown in FIG. 12 as described above, the microcomputer (IC) moves to step (1) in FIG.
Step 440) proceeds to step (1445), where photometric data is input from the photometric circuit (LM) and a spot photometric value used for exposure is created. Here, creation of photometric values will be explained with reference to the photometric range shown in FIG. 11 and the flowchart for inputting and creating photometric data of the microcomputer (μC) shown in FIG. 19. In FIG. 19, the microcomputer (μC) first determines in step (11600) whether or not a flag (AELF) indicating AE flock is set, and if the flag (AELF) is set,
Returns because the photometric value is not updated. Flag (A
ELF) is not set, the terminal (CSL
M) is set to "H" level, the photometric circuit (LM) is commanded to output photometric data, and serial communication is performed (11
605, 111610).

Through this communication, the brightness values (Bv+-Bv4) of the four photometric ranges shown in FIG. 11 are input. When communication is completed, the terminal (CSLM) is set to "L" level (+11615
).

Then, in the next step (11620), it is determined whether spot metering is selected, and if it is selected (
Fl)l! = 1), the brightness value (Bv
z) is the spot value (Bvsp) (+11660)
, when the mode is multi-point mode (Fb+□=0), the process goes from step (+11620) to step (111622), and it is determined whether or not a flag (AFNF) indicating that it is not in AF mode is set, and then in step (11624). Determine whether or not the flag (LCONF) indicating focus detection is not possible is set, and if either one is set, return the small photometry range (LM*) in the center as the spot value (Bvsp). . Flag (AFN
When F) and (LCONF) are not set, image magnification β is calculated from β = focal length/distance based on the distance information and focal length information input from the lens (#162
5), in the next step (11630), it is determined whether this image magnification β is greater than or equal to a predetermined value (K),
Determine the size of the subject that will occupy the shooting screen. If it is greater than or equal to the predetermined value, the object is considered large and the step is taken (11640).
Let the average of the brightness values (Bv+) + (Bvz) + (Bvs) of each photometry range (LMI), (LM2) (LM3) be the spot photometry value (Bvsp).

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, which flag (AFIF to AF3) among the flags indicating the focus detection range is selected.
The range is determined by whether F) is set, and if the flag (AFIF) is set, the photometry range (
If the brightness value (By+) of LM, ) and the flag (AP2F) are set, the photometry range (luminance value (B
vz), when neither flag is set,
That is, when the day focus amount of the third island (8F) is selected, the brightness value (BV3) of the photometry range (LM) is selected.
) are respectively the spot photometric values (Bvsp) (1116
45 to 11665), then determines whether or not focus is achieved, and if in focus (AFEF=1), sets the AE flock flag (AELF) to perform AF-AE flock, and if not in focus (AFEF=O ) is the AE floc flag (AELF
) and return respectively.

After determining the spot photometry value in this way, the microcontroller (
μC) proceeds to step (1450) in FIG. 6 and performs control regarding the AE flock, which will be explained with reference to the flowchart shown in FIG. 20. Furthermore, here,
To cancel AE flock, press AE flock switch (S□L)
When is pressed once, AE lock is applied for as long as it is pressed, and when the AE lock switch (SAEL) is pressed again or power self-hold is released, AE lock is canceled (10 seconds hold mode) and a mode in which the AE flock state is maintained only while the AE flock switch is pressed, and these modes are selected by the IC card. In FIG. 20, in step (111700), the microcomputer (μC) first determines which of the two modes the mode is in using the data in E"FROM (
MSbs), and when in the 10 second hold mode, proceed to step (11705) to determine whether or not the AE flock switch (SAEL) is turned on. If not, the AE flock switch is turned on. The flag (11EONF) indicating that the flow after the operated step (u705) has been executed is reset (m171).
0), return.

In step (111705), if the AE flock switch (SAI:L) is ON, the above flag (
Check whether step (AE 0NF) is set or not.
111715) and returns immediately if it is set. If not set, step (
11720), it is determined whether or not the flag (AELP) indicating that the AE flock operation is working is set, and if the flag (AELF) is not set, it is assumed that the operation was performed to perform the AE flock operation. , this should be set +11730), If the flag (AELF) is set, the flag (AELF) should be reset as it is assumed that an operation was made to release it while the AE block was in operation.
1725), proceed to step (11735), and perform the AE
The flow switch (SAtt) is operated, a flag (AE 0NF) indicating that this flow has been executed is set, and the process returns.

At step (+11700), if it is not the 10 second hold mode, at step (11740)
Determine whether the E floc switch (sAtL) is turned on or not, and if it is not turned on, set the flag (AELF).
(11755). When it is ON, set the flag (AELFI) (111745)
, resets and starts the power supply holding timer (T) (11750), and returns. In this way, when the AE flock switch (sAtL) is turned on, the power is maintained.

In FIG. 6, after controlling this AE block, the microcomputer (μC) performs second data communication with the card in step (11455). This data communication is
To explain with reference to FIG.
=0) Return without data communication. If the card is installed, set the terminal (C5CD) to rH level (1330), output the IC card (CD) nitator (11335), indicate that the IC card is the input side, and then step (11340). ), it is determined whether the IC card installed in the camera is a mode setting card or not, and if it is an IC card in data setting mode (bz-1 of 20H), step (#90 of FIG. 12) is performed.
Set the switch data that was sensed and memorized in step 0) #344), perform serial communication (#348),
Output switch information to an IC card (CD). After that, set the terminal (C5CD) to "L" level and +13
50), return.

In the determination at step (1340), if it is not a mode setting card, that is, if it is a program card (20
, bz=O), set the exposure calculation data, flash data, and lens data that are necessary for exposure calculation, perform serial communication, and transfer these data to I.
Output to the C card, set the terminal (CSCD) to "L" level, mark the end of data communication, and return (1134
6~#350).

Note that the data for exposure calculation is the photometric value (Bvs).

(BvAv), film sensitivity (Sv), and data indicating whether it is a positive or negative film. Lens data includes focal length data, aperture F (II (Avo)
, maximum aperture value (Av+wax), flash data indicating whether the flash is forced to fire or automatic, and data indicating whether the flash is not installed (including when the power is off).

There is a GN (guide number), data on whether charging is completed, etc.

When the above-mentioned card data communication (II) is completed in FIG. 6,
The microcomputer (μC) proceeds to step (#460) and performs exposure calculation here.

The flow of this control is shown and explained in FIGS. 22 to 26. First, the microcomputer (μC) performs step (m2
How much is the exposure amount (AE v +) that is always corrected with o00)?
A new exposure correction amount is calculated by adding the manually set exposure correction amount (8 EV) to it (12001).

Then, in step (m2002), it is determined from the input lens data whether a lens is attached, and if it is not attached, the photometry range (LM4
), the film sensitivity (SV) and the exposure correction value (ΔEv) are added to the photometric value (BVAM) (instead of this, the overall average photometric value may be used) to calculate the shutter speed and return (12005). If a lens is attached, perform exposure calculations according to each exposure mode (12
010-12040).

Therefore, the exposure calculation for P mode is shown in Figures 23(a) to (C).
To explain it as shown in the figure, the microcomputer (μC) first
In step (112100) of FIG.
sp) is 2Ev or more (1
12100), if it is 2 Ev or more, it is determined in step (112105) whether or not the electronic flash device is ready to emit light (the main capacitor is fully charged), and if it is ready to emit light, the terminal (FL (IK ) to rH, level (12110) to enable flash photography, and set the control exposure value (Ev) to the light metering value (By) of the metering range (LMl).
From AI4) etc., Ev = BVAN +Avo+Svl
Find it by +ΔEv (t2115), where 1 is subtracted (
This is because the background is set to IEv over to make it look like it is backlit. In addition, I am trying to properly expose the main subject using a flash from an electronic flash device. and aperture value (Av)
, Proceed to the subroutine (12120) of program (1) for determining the shutter speed (Tv), and return. To explain this as shown in FIG. 23(b), the shutter speed control value (Tvc) is tuned to Tv=7 (SS=1/12
5), the aperture value (Av) is found by subtracting 7 (shutter speed) from the exposure value (, E v ), and this aperture value (A
It is determined whether or not v) is larger than 7 (F-11), and if larger, the control aperture value (Avc) is limited to 7 and the process returns (112215). If the aperture value (Av) is 7 or less, it is determined whether the calculated aperture value (Av) is smaller than the open aperture value (Avo), and if it is smaller, the open aperture value (Av
o) is set as the control aperture value (Avc), and if it is not smaller, the calculated value (^V) is returned as the control aperture value (Avc) (112220 to 112230).

Returning to FIG. 23(a), in step (112105), if the electronic flash device (FL) is not ready to emit light, the terminal (FLOK) is set to the "L" level.
(t
2130), the subroutine of the program ■ that calculates the aperture value (Av) and shutter speed (Tv) (+12
135) and return.

This is shown and explained in Fig. 23 (C). First, in step (12250), the aperture value (Av) is set as ^v=5/8Ev.
-25/8 and determine whether this aperture value (Av) is larger than the maximum aperture value (Avmax) of the lens.
2255), if it is large, the maximum aperture value (Avmax
) as the control aperture value (Avc) (+12260),
Proceed to step (112280). Step (+122
55), the aperture value (Av) is the maximum aperture value (Avma
x) or less, the aperture value (Av) is the open aperture value (AvO
), and if it is smaller, the open aperture value (Avo) is set as the control aperture value (Avc), and if it is not smaller, the calculated aperture value (^V) is set as the control aperture value (Avc) in step (12280). ) (12265-1122
75).

In step (12280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). In the next step (+12285), it is determined whether this is greater than the maximum shutter speed (Tvmax), and if it is, the control shutter speed is The speed (Tvc) is limited to (TvmaX) +12290), and if it is not larger, it is determined in step (+12292) whether it is slower than the slowest shutter speed (Tv+win), and if it is slower, (Tvmjn) Set the control shutter speed as #2293), and if it is not slow, set the calculated shutter speed (Tv) as the control shutter speed (Tvc) (
12295), return.

Returning to FIG. 23(a), in step (112100), when the By□-BvspO difference is less than 2, it is determined that there is no backlight condition and the process proceeds to step (12145), where the average photometric value of the photometric range (LMl) to (LMl) is determined. (Bv+ +B
The exposure value (Ev) is determined from vz +BV3 +Bva)/4, and it is detected whether the flash device is ready to emit light (12150).

When ready to emit light, press step (+12155
) to determine whether or not the flash photography auto mode automatically determines the presence or absence of flash photography, and if it is in the auto mode, set the aperture value (Ay) and shutter speed (Tv) using the program ■ above. (+12160), the shutter speed (Tv) is the camera shake warning speed (Tv-6,1
/60) (a2t65);
If the speed is less than the camera shake warning speed, the process proceeds to step (12170) to perform flash photography at a low speed, and also proceeds to step (#2170) in which it is determined that forced light emission is to be performed even when the auto mode is not in step (+12155). Then, set the aperture value (
Av) and shutter speed (Tv) are determined and the terminal (FLO
k) to rH' level +12175) to enable flash photography.

However, in step (12150), if the preparation for emitting light is not completed, the process proceeds to step (112180) for shooting with constant light, determines the aperture value (AV) and shutter speed (Tv) using program H, and determines the aperture value (AV) and shutter speed (Tv) using the terminal (
FLOk) is set to "L" level (12185) and returns. Also in step (12165), when the shutter speed (Tv) is 7 or more (synchronized speed or more), the process similarly proceeds to step (112185) and returns.

Next, Fig. 24 shows a flowchart for determining the aperture value (Av) and shutter speed (Tv) in A mode. First, it is determined whether the electronic flash device is ready to emit light. , if the light emission preparation is complete, set the control shutter speed (Tvc) to 7 (1/125), set the terminal (FLOk) to r)IJ level, and set the aperture value (Av
) is returned as the control aperture value (Avc) (112
300 to +12310 and +12345). If the flash preparation is not completed, calculate the exposure value (Ev) from the average metering value, and subtract the set aperture value from this exposure value (Ev) to determine the shutter speed (Tv) (112315.1
2320), and in the next step (12325), it is determined whether the shutter speed (TV) is larger than the maximum controllable shutter speed (Tvmax), and if it is larger, the maximum shutter speed is set in step (I2330). (Tvmax) is set as the control shutter speed (Tvc) and the process proceeds to step (12340).

If it is not large, the minimum controllable speed (Tv+m1
Step (12331) to determine whether the speed is slower than n)
If the speed is low, step (112333)
Let (Tvmin) be the control shutter speed (Tvc), and if the speed is not lower than (Tvmin), step (1
12335) to control the calculated value (Tv) and the shutter speed (Tvc), respectively in steps (112340).
Proceed to. At the step (I2340), the terminal (FLOK)
is set to the "L" level, and in the next step (112345) the set aperture value (Av) is made to become the control aperture value (Avc).

Next, to explain the control in S mode as shown in FIG. 25, first, in step (12400), the exposure value (Ev
) is determined from the average photometric value, etc., and it is determined in step (12405) whether or not light emission preparation is complete. If light emission preparation is complete, the terminal (FLOk) is set to rl (J level (112410)).

Next, in step (112415) the shutter speed (T
V) is 7 or less, and if it is 7 or less, the set shutter speed (TV) is changed to the control shutter speed (Tv).
c) If it exceeds +12420) or 7, the synchronization speed 7 is set as the control shutter speed (Tvc) and the process proceeds to step (I2430).

In step (+12430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the determined exposure value (Ev), and this aperture value (AV) is calculated as the maximum aperture value (Av
o) If it is smaller than I2435), the control aperture value (Avc) is changed to the open aperture value (Avo
) (I2440) and return. On the other hand, if the aperture value (Av) is not smaller than the open aperture value (AV0), it is determined whether it is larger than the maximum aperture value (AVIllax) (112445), and if it is larger, the maximum aperture value (Aviax) is controlled. Aperture value (AvC) is 1245
0), if it is not larger, the calculated aperture value (Av) is set as the control aperture value (Avc) (112455) and the process returns.

In step (112405), if the light emission preparation is not completed, the set shutter speed (TV) is set as the control shutter speed (Tvc) (12460), and the terminal (FLOk) is set as rL and level (12465).
The process advances to step (112430) and the subsequent flow is executed.

Next, when the mode is M mode (see Fig. 26), it is determined in step (112500) whether or not the preparation for emitting light is completed, and if the preparation is not completed, the terminal (FLOk) is set to "L" level, and the preparation is completed. Sometimes the terminal (FLOk) is set to rH,
level, proceed to step (+12515), and change the preset aperture value (Av) to the control aperture value (AvC).
), and in the next step (12520), the shutter speed (end) is returned as the control shutter speed (Tvc).

Returning to Figure 6, after completing the exposure calculation (+1460), the camera's microcomputer (μC) connects the IC card (CD) with the
Perform the second data communication (+1465), Figure 5 (C)
To explain this by showing a flowchart of this control, first, the terminal (CSCD) is set to "H" level, and the IC card (C
Performs serial communication with D) (+1360) and informs the IC card that the IC card is on the output side (1136)
0).

At this point, wait for a while (+1365), perform serial communication and input data from the IC card (CD) (1137).
0), and when this data communication is completed, the terminal (C3CD) is
Return to "L" level.

In this flow, the data sent from the IC card (CD) is different depending on whether the IC card is a mode setting card or a program card. First, if it is a mode setting card, the mode There is setting data and display control data that determines whether or not to display. That is, ■ Control shutter speed (C-Tvc)
, ■ Control aperture value (C-Avc) + ■ Flash emission/non-existence, ■ Flash dimming emission to full emission (Ful1 emission)/
There is data for ``No'', ``Card control is performed/not performed''. (See Table 7) After completing this card data communication (I[l) in Figure 6,
The microcomputer (μC) executes the card control flow of step (11470). Based on the data you entered, this flow will
Figure 27 shows how to determine whether or not to control the camera using the microcomputer (μC), and how the camera operates when the card function is selected. Step (1126)
02) and the card function is selected (CDF
Proceed to step (112605) when NF = 1), while no card function is selected (CDFNF
= 0), set the function bits (FbJ and (Fb, .) to O in step (It2677), respectively.
Furthermore, (+12680) changes the dimming level ff1(FΔE
v) and return. When the card function is selected, it is next determined whether or not a program card is installed, and if a program card is installed (bz""o of 20H), the camera using the IC card is activated in step (12610). It is determined whether the control is performed or not based on the data input from the IC card (CD). Then, if it is not a program card (bz of 20M = 1) at step (+12605) or if step (11261
0), if the camera is not controlled by an IC card, the process advances to step (112680) via step (12677).

If it is determined that the camera is controlled by an IC card, the control aperture value (Avc) + control shutter speed (T
vc), the presence/absence of Ful1 light emission, the presence/absence of flash light emission, etc. are determined based on the data input from the IC card (112615 to 12645). Next, it is determined whether or not the flash light emission mode is selected based on the input data (1126).
50), when not in flash light emission mode, set the terminal (FLOK) to "L" (1I2685), step (+12
680) Proceed.

When in flash mode, connect the terminal (to FLO) to rH.

Detect the level (Jt2655), detect whether it is in the Ful1 emission mode (12660), and
When in the light emitting mode, the terminal (Full) is set to "H" level in step (12665) and returns, and the Full
When not in 1 flash mode, set the terminal (Full) to "L" level +12670> and change the dimming level value! (C-
FΔEv) (#2675) and return.

In FIG. 6, after completing the routine for determining and controlling the camera using the IC card (11470), the process moves to display control (1472).

Table 9 shows the contents of data sent from the microcomputer (μC) to the display control circuit, so to explain this first, the shutter speed and aperture value are set to set or calculated values. The display of various modes is set according to the mode set at that time. AE momo display is b
e, bt is the currently selected mode, b2 to ba
(Display data corresponding to change mode ■) is E”PRO
? Data is read from I and the data is set. Data for the card display and data change display is set according to the currently set mode.

bt (spot/multi-point forced display) is "1" when the flag (multi-point/spot display) is set, and the multi-point/multi-point display on the display (DISP+) on the camera body is set. When each mode is forcibly selected (spot AF by program card, or spot AF by multi-point switch (S,)) using the display indicating that spot mode change is possible, you can change the multi-point/spot mode. Regardless of whether it is possible or not, multiple points or spots are displayed.

In the display control circuit (DISPC), when b7=1, multi-point or spot display is performed according to the signal b.

The number of films is set to the number of films at that time, and the display data of the state at that time is also set for the patrol and tongue display.

In the IC card related mode display, "bo" in (1) is set according to the installed card, and other (1)
, n, I[[) is E”PROM (except when setting data)
When data is set, the change mode data sent from the IC card is set.

The controls are set according to the camera sequence.

The display control circuit (DISPC) determines what to display based on this control data. The LED is
Data is set when needed for display. Display control is shown in FIG. 28 and will be explained.

First, the microcomputer (μC) determines in step (I2700) whether or not a flag (CDFNF) indicating whether or not the card function is working is set, and if it is set, the next step (112710) is performed. ) ~ (I27
20), it is determined in step (112710) whether a flag (CDIF) indicating that the process has passed once is set. Here, if the flag (CDIF) is not set, set it in step (+12715) to display the functions added by the card when the card function changes from not working to working. Step (
112720) and step (112725).
). When the card function is not working (CDFNF
= O) includes steps (12710) to (1127
20) is passed once.
2705) and go to step (112725), or if this flag (CDIF) is set, go from step (I2710) to step (12) without doing anything.
725).

In step (I2725), the above flag (DISPI
F) is set, and if it is set, it is determined in step (I2727> whether the card type is a program card or not, and if it is a program card, rPRO, the card is set. In step (1272B), mode data indicating the rCARD display indicating that the rCARD is working is created.

Note that the display in this case is as shown in FIG. 35(a). Specifically, bs and bb of the display register (RAM) address (OA, l) are set to "3", and b1 to b4
is set to "0". This allows the display control circuit (DISP
C) reads this data and displays it on the display unit.

If it is not a program card, that is, if it is a mode setting card or if the card is not loaded, step (1272
In order to display the display data as shown in FIGS. 34(a) to (e) using the card functions set in the camera in 9), OA M's t) 5+ bi= 2, b+-ba
= O9 Note that the display data and display contents change depending on the set contents.

If the flag (DISPTF) is not set in step (112725), the next step (112730)
) to determine whether or not to perform display control using the card, and
When controlling the display using a card (CD), display data should be set according to the mode setting data input from the IC card (OA, bs+ bh-0, b+-b4")
Set to 0 (12735).

If there is no card display control signal from the IC card in step (I2730), the process advances to step (112736) and it is determined whether the write flag (WRTF) to E"FROM is set.Write flag (WR
TF) is set, that is, when the card-based data setting mode is completed, the process advances to a mode setting subroutine (12737) to set the mode. Further, the process proceeds to step (12740), and in order to perform a normal display as shown in FIG. 2(V), the bs,
Set bh=1, b+ to b4-0. In addition, if the card function is not working (CDFNF-0), "Card"
To delete the display, create data with address OA +1 minus -0.

Each step (12728), (112779),
(+12735) and (I2740) In the finder display, presence/absence of focus display is a flag indicating focus (AFEF), and presence/absence of focus detection failure display is a flag indicating focus cannot be detected (LCONF). , presence/absence of display indicating continuous or tracking is a flag indicating tracking mode (following F) or indicating continuous AF (pb
s), Multi-point distance measurement Mespot distance measurement uses a bit indicating the function (
Fbz), 5ION, OFF is S, ON, OFF
Address OCH according to the flag (S, 0NF) indicating
b0 to b are set respectively.

In addition, in the display control circuit (DISPC), the switch (S
When a signal (SIOFF) indicating that the signal (+) is OFF is received, the infinder display is turned off regardless of the signal (b, to b4).

Step (112728) (112729) (+1
2735) In all cases of (12740), proceed to step (112745) and display control circuit (DISP
To perform data communication with C), set the terminal (CSDISP) to "H" level, then perform serial communication (camera output side) in step (112750), and after the communication is completed,
Set the terminal (CSD l5P) to “L” level (127
55).

Next, when the card function is activated, it is determined in step (112760) whether or not a flag (DISPIF) indicating a fixed time display is set, and if it is set, the CPU waits for 2.5 seconds (112765). Display is performed during this time.

Next, in step (2770), flag (DISPIF) is set.
If the flag (DISPIF) is not set in step (s2760), proceed to step (112765).
and (112770) and skip step (112
780), and in step (#2780) the control system is
It is determined in step (112780) whether or not the r-tutter speed (Tvc) is less than 6 (1760), and if it is less than 6, it is determined whether a mode for issuing a buzzer warning is selected (12785). . If selected (MSbq
~MSb+z=ON, 211.411.6M, 8
M.A.H.

Co, E N, ) outputs a pulse of a predetermined frequency from the terminal (OBZ) for a certain period of time to issue a warning using a buzzer (112790), and proceeds to step (*2792).

When the control shutter speed (Tvc) is 6 or more or the mode does not provide a buzzer warning (MSb* to MSb1
□-LM, 3n, 58.7M, 9n, Bn, D□, FM
, ) does not give a buzzer warning and steps (+12792)
Proceed to.

In step (12792), the camera function indicated by the input mode setting data is set to MSbo to M of the E'PROM.
Flag () IRTF indicating whether to write to Sb 12
), and if it is set, step (1279
4) The above mode setting data, ie, b1 to b4 at address 22.4 b0 to b at address 23H! , b, ~b.

Address 24N,~b.

Address 26N b0~b of E'FROM (MSb, ~MSbs, MSbs
~MSb+t, MSbta~MSbsa), write to the bit according to the data content, and step (+1279
In step 6), reset the flag (WRTF) and return. Flag (WRTF) at step (12792)
If is not set, simply return.

The above mode setting subroutine (12737) is
To explain it as shown in the figure, here, it is determined whether or not all the modes currently set on the camera are in the newly set mode, and if they are not, the mode is moved to another set mode. There is. For example, if A mode is currently selected for exposure, but if A mode is removed from the exposure mode selection by an IC card, the A mode remains as before.
It would be strange to display and control the mode, so this is prevented.

Now, in the flow of Figure 30, the microcomputer (μC)
First, set the flag (CHGF) that is reset when there is a changeable mode (1!3200), and check whether the settable exposure mode has been changed using the EtPROM data (MSb, ~MSbs) and the rc card (CD). Compare the input data (b0 to bz of address 23.13203) with the input data (b0 to bz of address 23.13203), and if they are different (
In other words, if there is a change), in order to force the exposure mode to P mode, change the data (Fbo, Fb+) to (0,0
) and proceed to step (113210).

Next, in step (+13210), it is determined whether or not there is an H/S mode, and if there is, (address 22.nosu, = 1
), the flag (CHGF) is reset, the change data (CDbo to CDbg) indicating the change position is changed to H/S (0° 0.0), and the process proceeds to step (113230) (lt3220.113225).

When there is no H/S mode (address 22H = 0)
The data (Fb8.Fbt) is (0,0) H/S
As None (m3215), Step (m3230)
Proceed to.

In step (113230), it is determined whether or not there is a 10/- mode, and if there is (1 at address 22M) tx
1), determine whether the flag (CHGF) is set in step (m13245), and if it is set, reset the flag 113250), and change data (CDb, ~ C
Db+) as +/- change (001) and step (+1
3260).

If the flag (CHGF) is not set in step (113245), step (113250),
(113255) and directly proceed to step (13260).

In step (113230), if there is no +/- mode (bt at address 22H = o), the functional data (Fb4.Fbs) is set to (0,0) with no correction.
and step (dew 326
Proceed to 0) (+13235.cloud 3240).

In step (113260), it is determined whether or not there is an S/C mode, and if there is (b3 of address 22.l =
1) Determine whether or not the flag (CHGF) is set in step (+13270), and if it is set, reset it.
Further, as an S/C change, the change data (cDb0 to C0bz) is changed to (0, 1, 0) at step (+13280) and the process proceeds to the next step (13285).

When the flag (CIIGF) is not set,
Skip steps (+13275) and (13280) and proceed directly to step (#3285). Step (
13260) and there is no S/C mode (address 2
For the 2nd model bio-o), there is a step (
113265), set the function data (Fb3) to (0) and proceed to step (113285), step (132
85), it is determined whether or not there is an S/A mode, and if there is (b4 of address 22o = 1), step (l
t3295) Determine whether the tear lag (CHGF) is set, and if it is set, set the flag (CHGF).
CHGF) is reset (+13300), and in the next step (113305), the changed data (CD b * ~ CD b z ) is changed to (0, 1, 1) as an S/A change.
) To I, teleturn. Previous step (13295
), if the flag (CHGF) is not set, it is assumed that there is no changeable mode (13310), and the change data (CDbo to CDbt) is returned as (1°0.0).

Also, if there is no S/A mode in step (13285) (atlz22M(7)b4=O), multi-point ranging mode (A mode) is selected in Sf Tsubu (3290).
In order to do this, the function data (Fbz) is set to (0) and returned.

When the display control 411 (1472) described above in FIG. Time (IF7-'
H”), enable interrupts and return (11474
), when it is turned on (IPy=rL''), it is determined in step (#475) whether or not the self mode is selected based on whether the self mode selection switch (S*ttr) is turned on. If the switch is turned on (IP
+z −' L J ), to process self-photography,
Proceed to step (m1478).

This subroutine is shown in FIG.

First, the microcomputer (μC) stops the AF motor at step (14500). This is to prohibit AF operation when taking self-photographs, when there is no subject and the background may be in focus. ) 0th order internal E"F
Read the signal indicating the timer time for self from the ROM (14505), then step (14510)
), it is determined whether or not 23 is selected, and if 23 is selected here (MSbi.

! , = 0.0), the process waits for 2S at step (cloud 4515) and returns, and proceeds to step (11490) in FIG. 6 to perform exposure control (1495).

Similarly, when 53 is selected, 5S.

When 10S is selected, each waits for IO3, returns, and performs exposure control (step (14) in Figure 6).
90) (14520-14530).

If it is not the self mode (IP+z −'HJ) at step (11475) in FIG. 6, step 1480
). In this step (1480), it is determined whether the mode is manual focus mode (?lFF-1 (focus lock or manual focus adjustment with focus detection only)), and if it is manual focus mode, the process goes through step (1490). The process then proceeds to step (1495) to perform exposure control, and if the mode is not manual focus mode (A mode), the process proceeds to step (1485).

In step (1485), a flag indicating focus (AFEF
) is set, and if it is not set, returns without performing exposure control.

When the flag (AFEF) is set or when not in AP mode (i.e. in manual mode)
In step (+1490), interrupts to this flow are prohibited, and in the next step (1495), exposure control is performed (described later), and in step (+1500), the film is wound one frame (this is also described later). ), release switch (
It is determined in step (+1505) whether or not S2) is ON, and if it is ON (IP?=' L J ), it is determined in step (11510) whether or not it is continuous shooting mode, and it is determined that it is continuous shooting mode. Time (Fbs-1), step (151
5) Enable all interrupts [Proceed to SO3 routine,
When not in snapshot mode (pbs-0), step (11)
The process returns to step 505) and waits for the release switch (S) to be turned off. When it is turned off, all interrupts are enabled in step (#520) and the process returns.

Next, the exposure control subroutine of step (11495) is shown in FIG. 31 and will be described. First step (I28
00), it is determined whether charging is completed based on the data input from the flash device (ST), and if charging is completed, the terminal (C
SST) is set to "H" level for (t,) to indicate that it is in exposure mode, and the amount of light adjustment is film sensitivity (Sv), exposure compensation amount (ΔEv), and amount of flash light emitted from the IC card. A correction amount (FΔEv) is calculated and output after D/A conversion as analog data to a dimming circuit (STC) (112810).

In the next step (112815), the control aperture value (Av
After performing aperture control based on c) and controlling mirror up (12820), the control shutter speed (Tvc
) to control the shutter speed based on (11282
5) Further, set the Ful1 light emission signal terminal to rl, J level (112830) and return.

Here, the operation of the interface circuit when the flash is emitted is explained in the ninth section.
To explain based on Figure (b), during a flash shadow, the terminal (to FLO) is at rH level, and when the front curtain of the shutter completes travel, the X contact turns ON, and the AND circuit (
The light emission start signal is sent from ANDt, ) to the electronic flash device (ST).
The electronic flash device (ST) inputs this and starts emitting light. When not in the Ful1 emission mode, "H" is applied to the AND circuit via the inverter (ITo+).
level is output, and when a pulse signal indicating completion of dimming from the dimming circuit (STC) is input, the AND circuit (A
NDiz) outputs this to the flash device via the OR circuit (Olh+). In an electronic flash device (ST), this is input to stop flash emission. In the Ful1 flash mode, the "L" level is input to the AND circuit (ANDzz), the AND circuit (ANDzi) becomes inactive, and the passage of the dimming signal is prohibited, so the electronic flash device (ST) In this case, no signal indicating the stop of flash emission is output.

FIGS. 32(a) and (b) show step (1) in FIG.
1500) is a flowchart of the control for winding one frame of the film shown in FIG. To explain this,
In Fig. 32(a), the microcomputer (μC) outputs the motor hoisting signal to the motor control circuit (MD), and the timer (
T,) is reset-started (112850.12
855).

This timer winds the film to the last frame,
This is a timer to detect when the film is stretched. The microcomputer (μC) uses a switch (Swo) to indicate that one frame has been wound in the step (I2860).
If it is not ON, it is determined in step (12865) whether 2 seconds have passed in this state, and if 2 seconds have passed, the motor is stopped (12B70). ), assuming the film is taut,
Control this film tension (12875)
, return. The above-mentioned subroutine is the 32nd one.
As shown in Figure 3, it is determined in step (I2920) whether or not auto-return (automatically rewinding the film after the film is loaded) is selected, and when it is selected (MSb* to MSb, ! -01,311,88-
BM (here H is a hexadecimal number) gives a motor reverse signal to the motor control circuit (MD) and waits for the film detection switch (SFLM) to turn on (1293
0,12935), then switch (SFL, 4) turns O
When the film becomes FF, it is determined whether or not to roll the entire film into the cartridge chamber.
bw~MSb+z -2H,3H,611+7o,
,A.

B111 EX, FM), wait 1 second (1
12945), motor stop control'(l(12955)), and then returns.

Unless it is involved (MSb of E”PROM, ~M
Sb+z-OH,IN, 48.511.8n, 91
1. cal, I) II), wait 0.2 seconds, stop the motor, and return (I2950).

When auto-return is not performed in the above step (112920) (MSb9 to MSb+z = 4 H to 7e, C
,,F,) proceeds to step (112925) and waits for the rewind switch (swn) to be turned on, and if it is turned on, proceeds to step (I2930).

Returning to FIG. 32(a), in step (112860), the 1-frame winding completion switch (She ON) is turned on.
Then, in step (112880), the motor is stopped, and in the next step (112885), it is determined whether or not the film sensitivity counter is a forward counting type.
If it is a forward calculation formula (MSb, ~MSbIz=OH~7M
), in step (112890), the count number (N, ) of the counter indicating the number of film shots is incremented by 1, and if it is a backward calculation method (MSb, ~MSb+
z), the count number (NO) indicating the number of remaining films is decremented by 1, and each step (+29
Go to 00). In step (+12900), this number of films (N1) is set to E”FROM MSb+) ~ MS
Write to bl11.

Next, when the back cover close detection switch (Slc) or the rewind switch (S++w) is operated, the terminal (INT
A pulse signal is input to 2), and the microcomputer (μC)
Execute the interrupt (INTz) shown in the figure. In the flow shown in the same figure, the microcomputer (μC) first prohibits interrupts to this flow (13000), and then steps (13000) after L.
113005), it is detected whether the rewind switch (S,) is turned on. When it is ON, the rewind operation is performed as shown in FIG. 32(b) [Rewind]
Execute the routine, enable interrupts, and return (
+13010), rewind switch (S+no) is ON
If not, the camera back close switch (Sac) is set to O.
If the answer is N, the process proceeds to step (113015), and it is determined whether or not a film exists. If there is no film, the film detection switch (SFLM) is therefore turned off.
In case of F, step (1
13100). On the other hand, if a film is present (i.e., SFLM is ON), the terminal (C3D
X) to rH level, and turn on the film sensitivity reading circuit (D
X) and performs serial communication with the film sensitivity data (Sv
) and the number of film shots (N), and when communication is completed, set the terminal (C5DX) to the "L" level (I302
0-53030). Then, set the number (N,) to -2 (13035), and then set the terminal (CSDISP) to "
Set to "H" level and perform serial communication with the display control circuit (
13045), a signal indicating the initial load (OAN b+-1° b8 to bh-o) and data on the number of film sheets are output, so that only data indicating the number of film sheets (N, ) is displayed. When serial communication is finished, the terminal (C5DISP) is set to "L" level (11
3050).

There are two 7s displayed for this number of films (Nl).
Displayed using segments. Next, microcontroller (μC)
outputs a signal indicating motor winding to the winding control circuit (13055) and waits for one frame to be wound (11
3060), 1 frame winding switch (Swt+) is ON
Then, 1 is added to the number of films (Nl) to determine whether the number has reached l. If it has not become l, step (
113040). If it is 1, proceed to step (I3075) to stop the motor, and further check whether the film counter is a forward count type or not to step (113).
080), and if it is a forward calculation formula, step (13
085), if (N,) is not a forward count formula, set the number of film shots (N) read in step (13090) to (NO) and proceed to step (113095).Then, in step (13095), Number of sheets (N
, ) and the film sensitivity to the specified address of E"FROM, and after writing is completed, enable all interrupts (113
100), return.

It should be noted here that in this embodiment, setting and resetting the flag and setting the bit to 1.0 are the same.

In the above, the microcomputer (μC) on the camera side of this embodiment
The operation of this camera has been explained using various flowcharts, etc. Next, the control of the IC card installed in this camera will also be explained using flowcharts. Note that the mode setting card and program card will be explained separately.

The IC card (CD) has a built-in microcomputer (μCz) with a built-in E"FROM.

First, let's start with the mode setting card.
When D) is attached to the camera, power is supplied, and as mentioned above, an interrupt is applied to the camera's microcomputer (μC), and a clock (φ) is sent to the microcomputer (μCz) on the IC card side. becomes drivable.

On the IC card side, the terminal (RE) is connected by attaching it to the camera.
A signal changing from "L" to "r" (J level) is input to the microcomputer (μCz), and the microcomputer (μCz) executes the flow shown in FIG. Reset and R” data from E”FROM.
Moves to the bit according to the data content in the AM bit (lCDl0) and waits for an interrupt (lCDl5)
.

A signal from the camera indicating a data communication request (CSBCK)
When the IC card's microcontroller (μC) executes an interrupt (INT), this is shown in Figure 40 and others.
50) to perform serial communication with the camera, and a clock (SCX) for data communication sent from the camera.
Based on the input data from the camera, it is determined which data communication (1, I[, III) it is (I
CD55), if it is data communication I, first check what type of IC card (mode setting or program)
Set the data that indicates to the camera (in this case the mode setting card), and output the data based on the clock (SCK) sent from the camera (llcD60
), wait for an interrupt (llcD63), If the data communication is ■, proceed from step (llcD70) to step (ICD75), and convert the data (in this case, key data) sent from the camera to the clock (SCK). They are input synchronously.Based on this input data, a data set routine (cloud CD75) is performed and an interrupt wait is entered (ICD63).

The routine for this data set is the 40th tffl (C
), the card data setting switch (S
c Check whether I, s is ON or not (ICD
After performing the respective controls in step (ICDIIO, 薯CD105) according to whether the switch is ON or OFF, proceed to step (position CD115) - (5eas ON) (5cDsOFF) control. The flow is shown in Fig. 40(e) and (f),
This control is shown in Figures 17 and 18 (5cDs
ON:l.

(5cns OFF) flow and comparison step (11
500) and step (111550) for determining the mode setting card (this is unnecessary on the card side); the other steps are the same, so the explanation will be omitted.

Note that the flag has a C at the beginning to distinguish it from the camera-side flag, and its function is the same as that of the camera-side flag without the C.

Returning to FIG. 40(C), in step (lCDl15), it is determined whether or not the set flag (SETF) is set, and if it is not set, (SCゎ, ON
] flow once and not through the flow (5cos OFF), the flag (CC
DSF) is set or not.
I25).

In this embodiment, the card data setting switch (Scl, s
) is OFF to enter the change mode, and when the flag (C3ETF) is not set in step (lCDl15), it indicates that the settings have not been changed yet, but have been changed.

When the flag (CCDSF) is set, the display control flag (DISPCF) should be set.lCDI2
5) If the flag (CCDSF) is not set, reset it (cloud CD130) and return.

By setting and resetting this display control flag (DISPCF), it is determined whether or not the camera side display will be the display in the data setting mode [step 1273 in Figure 28].
0) ), in step (llcD115), the flag (
CSETF) is set, execute the flow of dataset I for data modification and step (It
Proceed to CD125) (Hot CD117).

Here, the flow according to the operation of Dataset I will be explained.

In Figure 40 (a), the card switch (SeD) is set to O.
It is necessary to judge whether it is set to N or not (1CD135), and if it is set to ON, the bit that stores the change mode (
Determine the current change mode from CCKb0 to CCKb, change to the next mode, and return (lCD1
40).

At this time, the above bit (CCKb+s −CCKbit
) data is also changed. When the switch (seD) is not turned on, it is determined whether the up switch or the down switch is turned on.1lcD145. IC
[+155) If these switches are turned on, execute the flows of data sets (1) and (1) and return (lCD150, 1lcD160), respectively.If both are not turned on, do nothing and return.

Next, data set ■ is shown in Figure 40. To explain, first of all, the microcomputer (μC) has change modes (1) to (
■)) and remembers the number that determines the function in that mode) (CCKb, ~
CCKbzz), determine the current number and change it to the next number. For example, in mode ■, the current number is '0'.
'IJ' when set to J (H/S, exposure compensation, drive mode S/C, spot AF/multi-point AF available)
(Of the four, spot/multi-point AF cannot be changed). Data set (2) is almost the same as data set (2) above, and the only difference is that the advance of the numbers is reversed, so it is not shown.

Next, the case of a program card will be explained.

In this embodiment, the program card is a sports program that is useful when it is desired to photograph a scene in which a sport is being played.

Now, when the IC card is inserted into the camera, a signal that changes from the "L" level to the r l () level is input to the RESET terminal of the microcomputer (μCZ) on the card side, and the microcomputer (μCZ) on the IC card [Reset] shown in Figure 41
Execute the flow, reset the flag and vote in step (Ql), and wait for an interrupt (Q2). C from camera
When the 3BCK signal is input, an interrupt is generated and the flow (INT) shown in FIG. 42 is executed. The IC card's microcontroller (μC□) uses the clock sent from the camera (
Data communication is performed based on SCK (Q50), and the data at this time is data used by the camera to notify the card side of the type of communication, and the microcomputer (μCz) of the IC card transmits this data. The content of the communication is determined by inputting the information (Q51). In the case of data communication ■,
The data indicating the type of card (here it is a program card) and the AF mode are continuous,
Data indicating that the photometry zone has multiple points is output to the camera side through serial communication (Q52), and step (
Proceed to Q56) and wait for an interrupt.

This program card is designed for sports scenes, so it uses Continuous AF, which is always in focus to handle fast-moving subjects, and a multi-point metering zone, which has a wide metering range for the same reason. Since the distance measurement zone focuses on a moving subject, it is desirable to have a wide range of multiple points, but it is made switchable in case the photographer wishes to sharply focus only on the main subject.

If it is data communication (2), data necessary for exposure calculation is input from the camera (steps Q53 and Q54).

Then, perform exposure calculation and wait for an interrupt (Q55)
.

Next, before explaining an example of a specific flowchart of exposure calculation, an overview of the control of this card will be explained.

◇Cards for outdoor sports and sports days◇ [Contents] You can take pictures of moving subjects in relatively bright places with a high-speed shutter that prevents camera shake.

〔control〕

The control details for outdoor sports and athletic meet cards are shown in the program diagram of FIG. 37. This control is performed as follows.

(a) The aperture value Av of the lens is calculated using the following formula.

When Ev < 21, Av-(3/4) ・Ev-23
/4 When Ev≧21, Av-(1/2) ・Ev-1/
2, that is, when Ev < 21, the shutter speed (Tv)
Open up the aperture to speed up the process. Therefore, Av
= (3/4) - Calculate Ev-23/4.

When Eν≧21, the shutter speed (Tv) is already considered to be sufficiently high, so (Av), (Tv)
In order to change both smoothly, Av = (1
/2) · Calculate Ev-1/2.

Next, the open aperture values Avo and Av are compared. If the calculated value is smaller than Avo, the aperture value cannot be set to that value, so it is corrected to Avo.

Next, the shutter speed (Tv) is determined using the following formula.

When Av≧AvoO, Tv = Ev −AvAv<Av
At oO, Tv = Ev - Av.

(b) If the film is a negative film, the shutter speed (Tv) is corrected to increase the shutter speed (Tv).

Negative film has a wide latitude, so use this to underexpose by about IEv and maintain a high shutter speed.

Reversal film (positive) has a narrow latitude, so no correction is performed.

(c) Others The above control is performed when a lens with a focal length of 70 mm or more is attached. The reason for this is that sports photography requires a relatively long distance from the subject, so it is thought that a telephoto lens will not be able to sufficiently photograph the subject, and if a telephoto lens is not used, the image magnification of the subject will be small. ,
Control is not performed because the probability of camera shake caused by moving the lens to follow the subject is low.

In this control, the flash is forced off and the flash does not fire automatically. The reason is that this program card is intended for shooting in relatively bright places.
This is because the distance to the subject is considered to be relatively large, so even if the flash is activated, it does not seem to have much of an effect.

Further, in this control, if the flash switch is forcibly turned on, no control is performed. The reason for this is that this control does not cause the flash to emit light for the reason described above, so if the control is performed when the flash is forced ON, it will go against the photographer's will to make the flash emit light.

Next, a flowchart of the exposure calculation of the program card is shown in FIG. 43 and will be explained. In the figure, the microcomputer of the program card first determines the presence or absence of a lens based on the data input in step (3). Here, if the lens is not attached to the camera body, lens data such as the maximum aperture value (Avo) will not be sent to the IC card. Therefore, since exposure calculation cannot be performed, the process proceeds to step [phase], and exposure control is left to the camera body. If the lens is attached, proceed to step (3) and check the focal length of the lens from the input data. focal length is 7
For lenses smaller than 0II11, card control is not performed for the reason described above, so in this case too, jump to step @ and leave exposure control to the camera body. focal length is 70
If it is more than mm, check the state of the forced flash light switch from the data input in step (2). When the forced flash light switch is ON, the card does not perform control for the reason described above, so the process jumps to step @.

On the other hand, if the switch is OFF, proceed to the next step ■
The exposure value (Ev) is calculated by the sum of the spot brightness (Bvs) and the film sensitivity (Sv) of the input data. Then, the content of the control is changed depending on the value of the exposure value (Ev). For the above-mentioned reason, when EV<21, (Av) is obtained in step [phase] from the formula Ac(3/4)·Ev-23/4. When Ev≧21, Av= (1/2
) - Find (Av) in step ① from the equation Ev-1/2.

(Ay) calculated in step ■ and the minimum aperture value of the lens (
Avmax) is performed in the next step (2), and when Av≧Avmax, the lens cannot be narrowed down any further, so the body control aperture value Avc is set to Avysax in step (2).

On the other hand, when Av<Avmax, Avc is
=Av. In this way, the aperture value A for body control
After determining vc, the shutter speed (T
v) is calculated based on the formula Tv = Ev - Avc.

In the next step (■), this shutter speed (Tv) is compared with the maximum shutter speed (Tvmax) of the camera. If Tv≧Tvw+ax, proceed to step 1 @, and the shutter speed for body control (Tvmax) is compared. ) to (T
vs+ax), and when Tv<TvmaxO, Tvc = Tv in step @.

If Ev<21 in the above step ■, step [phase]
After calculating (Av) using the formula shown in (2), proceed to step (2).

In step [phase], the (Av
) and the open aperture Avo, where Av>A
When vo, go to step ■ above to compare (Av) and (Avmax) (If Av<AvoO, the lens aperture value cannot be opened any further, so go to step ■ and perform body control. The aperture value (Avc) is set to (Avo).Then, in step @, the shutter speed (Tv) is calculated from the formula Tv=EcAvc.

For the reason mentioned above, if the film is a negative film, the shutter speed (Tv) must be corrected, so the type of film is determined in step (2). As a result, in the case of a reversal (positive) film, the process proceeds to step O in order to prevent the shutter speed (Tv) from becoming extremely slow.

On the other hand, in the case of negative film, proceed to step [phase],
It is determined whether the shutter speed (TV) is smaller than 9. When Tv≧9, the body control shutter speed (Tvc) is set to (TV) in step [phase].

When Tv<9, the process proceeds to step [phase] and further determines whether the shutter speed (Tv) is 8 or more.

Here, when Tv≧8, set Tvc=9 and step @), and when Tv<8, set Tv=T at step
Perform the correction v + 1 and go to the next step @. In step @, to prevent the shutter speed (Tv) from becoming extremely slow, set the maximum value of (Tv) to Tv = -5 (30 seconds)
Make a comparison to limit the

Here, when Tv<5, Tvc=-5 (step @), and when Tv≧5, Tvc=Tv (step [phase]).

For the reason mentioned above, flash control is not performed, so in step [phase], a bit is set to turn off the flash. Thereafter, the process advances to step @, the camera control uses the value calculated by the program card, and returns.

When the flow of these exposure calculations is completed, the process returns to the flow of FIG. 42 and waits for an interrupt.

At this point, there is an interrupt from the camera side, and at this time, if there is data communication (■), the data of the calculated aperture value (CAvc) + shutter speed (CTvc) and whether or not to control the camera using the card, and whether or not to force the Full 1 emission (Fb9 =0
)1 Prohibition of forced flash (Fb, .-〇), flash adjustment amount (C
Data regarding the reset of FΔEv) is created, serial communication is performed, and data is output to the camera side. Note that the microcomputer (μCZ) of the card stops during communications other than those mentioned above.

Here, the switches mentioned in the explanation of this embodiment, their functions, various data, etc. are shown in Tables 1 to 12 below.

Table 1 (Table 1) Table 2 (aJ Table 2 (b) Table 2 (C) Table 2 (d) Table 2 fe) Table 3 Table 4 Mode setting data (MSbn) E ”PROM No. 4
Table (Continued) Table 5 Changed data (CDb,) (RAM) Table 6 Card communication output data (C5b,,) Table 7 Data from card Table 7 (Continued) Table 8 (a) Table 8 (b) Table 8 (Continued) Table 8) (Continued) Table 9 RAM for data display (Register) Table 9 (Continued) Table 10 Lens (1) Table 11 Lens (n ) According to the present invention, signals that can be distinguished between two types of cameras that are functionally different are given from the lens side, so one lens can be attached to each of the two types of cameras. In this case, the function of the lens can be used with either camera, and the range of use of the lens function can be expanded.

[Brief explanation of the drawing]

The figures are all related to embodiments of the present invention, and Fig. 1 is a circuit block diagram of the entire camera, Fig. 2 is a diagram showing the display form on the display section, and Fig. 3 is a diagram of the camera when the battery is installed. 3 is a flowchart showing a reset routine. FIG. 4 is a flowchart showing the initial set routine in FIG. FIG. 5 is a flowchart of data communication performed between the camera and the IC card attached thereto. FIG. 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., FIG. 6(a) is a detailed view of a part thereof, and FIG. 7 is a flowchart showing a routine for inputting lens data therein. FIG. 8 is also a flowchart of flash data input. FIG. 9(a) is a circuit diagram of an electronic flash device,
FIG. 9 et al.) is a circuit diagram of the interface. FIG. 10(a) is a flowchart of the AF sequence,
Figure 10 et al.), Figure 10 (C), Figure 10 (d), Figure 1
FIG. 0(e) and FIG. 10(f) are detailed views thereof. FIG. 11 is a diagram showing the distance measurement range and photometry range within the shadowmost screen. FIG. 12 is a flowchart showing a setting routine for the keys provided on the camera, and FIG.
Fig. 14 (a), Fig. 14 et al.), Fig. 15, Fig. 16,
FIGS. 17 and 18 are flowcharts showing specific setting routines for the various keys. Figure 19 is a flowchart showing the routine for creating photometric data;
Figure 0 is a flowchart of the AE flock. Figure 21 (
a) and FIG. 21(b) are flowcharts for setting the aperture and shutter speed. FIG. 22 is a flowchart of exposure calculation, and FIGS. 23(a) and 23(b). FIG. 23(C), FIG. 24, FIG. 25, and FIG. 26 are flowcharts of each mode therein. Figure 27 is I
It is a flowchart of control by a C card (particularly a program card). FIG. 28 is a flowchart showing the display routine, and FIG. 29 is a flowchart showing the self routine. Figure 30 is a flowchart for mode setting, Figure 31 is a flowchart for exposure control.
32(a) and 32(b) are flowcharts for winding one frame of film, and FIG. 33 is a flowchart showing an interrupt routine for closing the back cover. 34th
35 and 35 are diagrams showing display examples. FIG. 40 is a flowchart showing various routines for IC cards, and FIGS. 41 and 42 are flowcharts particularly for program cards. FIG. 44 is a program diagram regarding the program card. (μC) ～・・・−・・−・−・Microcontroller of the camera body (μC2) −・−・−・Microcontroller of the IC card (C
D)・・・−−−−−−m−−・−−−−−・RC card (S,) ・−・−・−・−・−・−Lens side switch (10)・・−・・・・−・−・−Lens. Figure 2 (a) Figure 2 (C) Figure 2 (d) Figure 2 (0) Figure 2 (1)) Figure 2 (CI)
Figure 2 (r) Figure 2 (S) Figure 2 (1) Figure 2 (u) Figure 2 (V) Figure 5 (a) Figure 5 (b) Figure 5 (C) Figure 7 Figure 8 Figure 10 Figure (b) Figure 10 (C) Figure 10
Figure (f) Figure 12 Figure 14 (b) Figure 15 Figure 16 Figure 17 Figure 18 Figure 22 Figure 26 Figure 29 Figure 31 Figure 32 (a) Figure 32 (b) Figure 34 (C) Figure 34 (d) Figure 34
(e) Fig. 35 (a) Fig. 35 (b) and -F setting card reconnaissance Fig. 38 Fig. 39 Fig. 40 (a) Fig. 40 (C) Fig. 40 (d) Fig. 40 (已) Figure 40 (9) Procedural author's letter (method) September 26, 1988 1. Indication of the case 1988 Patent side No. 115632 2. Title of the invention Camera system and lens 3, correction Relationship with the patent applicant case (607) Representative of Minolta Camera Co., Ltd.
1) Hideo Shima 4, Agent 〒540 6, Subject of amendment 7, Contents of amendment (i) The following sentence is inserted after the statement on page 160 of the specification, line 9. ``Figure 36 shows the circuit inside the interchangeable lens, Figure 37 shows the interchangeable lens, Figure 38 shows the display in the viewfinder related to focus detection, and Figure 39 shows the display on the top of the camera body. This is a diagram showing a display example.'' (ii) The following sentence is inserted after the statement on page 160 of the specification, line 12. ``Figure 43 is a flowchart of the exposure calculation of the program card.''That's all.

Claims (1)

[Scope of Claims] (1) A camera system comprising a first camera, a second camera, and a first lens that can be attached to any of the cameras, wherein the first lens has an operation function. means, a signal output means for giving a lens information signal to the camera, and a signal output means for changing a first signal representing a first function from a first state to a second state by operating the operation means, and a second signal outputting means for supplying a lens information signal to the camera; The first camera is provided with a signal changing means for changing a second signal representing a function from a first state to a second state, and the first camera is provided with a signal changing means for changing a second signal representing a function of
and a first control means for controlling the execution of a function according to the state of the first signal. A camera system comprising: a signal determining means; and a second control means for controlling execution of a function according to the state of the second signal. (2) The first signal indicates autofocus permission in its first state and indicates autofocus prohibition in its second state, and the second signal indicates OFF of the operating means in its first state. 1. A camera system characterized in that the camera system is configured to display an ON state and display an ON state in a second state. (3) The camera system further includes a second lens attachable to the first and second cameras, and the second lens includes an operating means and a signal output for providing a signal of lens information to the camera. and signal changing means for changing a first signal indicating a first function from a first state to a second state by operating the operating means, and the second camera When the second lens is attached, the first signal from the second lens is determined, and the execution of the function is controlled according to the state of the first signal.
Camera system according to the claims. (4) The second camera receives a second signal from the first lens.
4. The camera system according to claim 3, wherein the camera system can change the function in the state. (5) a first camera having a first signal discriminating means for discriminating only the first signal; and a first control means for controlling the execution of a function according to the state of the first signal; A lens that can be attached to any of the second cameras, the lens having a second signal discriminating means for discriminating a signal, and a second control means for controlling execution of a function according to the state of the second signal. an operating means; a signal output means for supplying a lens information signal to the camera; and an operation means for changing the first signal representing a first function from a first state to a second state by operating the operating means. and signal changing means for changing the second signal representing a second function from a first state to a second state. (6) a first camera having a first signal discrimination means for discriminating only a first signal; and a first control means for controlling execution of a function according to the first signal state; a second signal discriminating means for discriminating a second signal; and said first and second signals.
A lens that can be attached to any of the second cameras, the lens having a second control means for controlling the execution of functions according to the state of the signal, the lens having an operation means and a signal of lens information to the camera. and a signal output means for outputting the first signal representing the first function by the operation of the operation means.
a signal changing means for changing the state from the first state to the second state.