JP2658408B2 - Camera system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera system having a plurality of exposure programs for determining an aperture value and a shutter speed based on a photometric value.

2. Description of the Related Art In general, a camera is provided with an electronic flash device integrally or detachably with a main body, so that flash photography can be performed as necessary. On the other hand, as an exposure program, a program mode (P mode) for automatically determining an aperture value and a shutter speed from a program diagram based on a photometric value includes an aperture priority mode (A mode), a shutter speed priority mode (S mode), and a manual mode. It is prepared together with the setting mode (M mode). Then, even in the P mode, flash photography can be performed.

On the other hand, regarding the P mode, US Pat. No. 4,673,277 proposes providing a plurality of exposure programs and changing to another standard exposure program when the effect of the set exposure program cannot be obtained.

Problems to be Solved by the Invention By the way, even if a special exposure program provided for photographing a moving subject such as sports is executed under flash emission, the effect of the exposure program often disappears. This is because, even if programmed to increase the shutter speed in order to capture a fast-moving subject such as sports, a sufficient shutter speed cannot be obtained as a result due to flash photography. No countermeasure is taken in the above-mentioned U.S. Pat. No. 4,673,277 regarding the relationship with such flash photography.

The present invention has been made in view of such a point,
It is an object of the present invention to provide a camera system that avoids execution of an exposure program that is useless in flash photography.

Means for Solving the Problems In order to achieve the above object, a camera system according to the present invention comprises: a plurality of exposure programs; setting means for setting an exposure program to be used from among the plurality of exposure programs; and setting of flash photography. Flash setting means to
In the set exposure program, determining means for determining whether or not flash photography is set, and when a specific exposure program of the exposure program is set, when the determination means determines that it is flash photography, the identification is performed. Means for shifting from one exposure program to another exposure program, and means for executing the shifted other exposure program.

In this case, the specific exposure program may be an exposure program prepared for photographing a moving subject.

Further, the specific exposure program may be set from outside the camera body by an external setting unit configured with an accessory such as an IC card.

When a specific exposure program (for example, the above-mentioned sports exposure program) among a plurality of exposure programs is set to be used, and the flash photographing is set by the flash setting means, the exposure program to be used is specified. The exposure program is changed to another exposure program, and the aperture value and the shutter speed are calculated according to the other exposure program. However, when the flash photography is not set in the state where the specific exposure program is set, the specific exposure program is executed without shifting to another exposure program, and the aperture value and the shutter speed are set according to the exposure program. Is calculated.

When the specific exposure program is set by mounting an accessory such as an IC card on the camera body, the specific exposure program can be built in the accessory.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, an entire camera control system using an IC card will be described, and in that, a change in an exposure program accompanying flash photography setting will also be described.

FIG. 1 is a circuit block diagram of the camera of the present embodiment.
In the figure, (μC) is a microcomputer (hereinafter referred to as “microcomputer”) for controlling the entire camera and performing various calculations, and has an E ² PROM so that writing and reading can be freely performed inside. (AFct) is a focus detection circuit for performing focus detection, which is composed of a CCD, an integration control circuit, and an A / D conversion circuit. Convert and output to microcomputer (μC).

(LM) is a photometry circuit which performs photometry for four areas described later, A / D converts the photometry value, and a microcomputer (μ).
C) as luminance information. (DISPC) is a display control circuit that inputs display data and a display control signal from a microcomputer (μC) and causes a display unit (DISP) to perform a predetermined display.

In this embodiment, there are two types of IC cards, a mode setting card for setting the mode of the camera and a program card for determining the exposure. Only one of them can be mounted on the camera, and the camera is mounted on the mounted IC card. Based on this, control of a specific mode and exposure program is performed. This will be described later in detail. (ST) is an electronic flash device, (IF)
Is an interface provided between the microcomputer (μC) of the camera and the electronic flash unit (ST), and (STC) receives the reflected light of the subject when the flash is emitted through the not-shown photographing lens and sets the appropriate exposure. This is a dimming circuit that stops flash light emission when. (LE) is a lens circuit provided in the lens, which stores information specific to the interchangeable lens in the microcomputer (μC) of the camera.
Output to (LECN) is a lens drive control circuit that drives the taking lens based on focus detection information, (TV _CT ) is a shutter control circuit that controls the shutter based on a control signal from the microcomputer (μC), and (AV _CT ) is a microcomputer (Μ
An aperture control circuit that controls the aperture based on a control signal from C), and a motor control circuit that controls winding and rewinding of the film based on a control signal from a microcomputer (μC). (BZ) is a buzzer that warns when the shutter speed reaches the speed at which camera shake occurs. (E)
Is a battery that serves as a power supply, (D ₁ ) is a diode for preventing backflow,
(C _BU ) is a backup capacitor for the microcomputer (μC), which has a large capacity. (R _R ) and (C _R ) are a reset resistor and a capacitor for resetting the microcomputer (μC) when the battery is installed. (Tr ₁ ) is a power supply transistor for supplying power to a part of the circuit described above.

Next, to explain the switches, (S _RE ) is a power supply switch that is turned off when a battery is mounted.
When the battery is installed and the switch (S _RE ) is turned off, a signal that changes from the “L” level to the “H” level is applied to the terminal (RE) of the microcomputer (μC), and the microcomputer (μC) performs a reset routine described later. Will be executed. (S _EM ) is a normally open exposure mode change switch, and the exposure mode is changed by the operation of this switch (S _EM ) and the operation of an up switch (Sup) and a down switch (Sdn) described later. (S _FM ) is a normally open function change switch, and the function change (for example, switching between continuous shooting and single shooting) is performed by operating this switch and operating the up switch (Sup) and the down switch (Sdn). (S _CD ) is a normally open card function enable / disable switch for switching between invalid and valid card functions when the card is mounted.

(S _CDS ) is a normally open card data setting switch that is operated to change the mode setting or set the data required for the function when a mode setting card or function card (program card) is installed. is there.

(So) is a photometry switch operated to perform camera operations (for example, photometry and display of various data) excluding an autofocus (hereinafter, referred to as "AF") operation. Just touch a release button (not shown). It is composed of a touch switch that is turned ON with. The above switches ( _SEM ) ( _SFM )
When one of the switches (S _CD ), (S _CDS ), and (So) is turned on, the microcomputer (μC) returns to (IN) of FIG.
Execute the interrupt flow of T ₁ ). (S ₁ ) is an AF switch for starting the AF operation, which is turned ON when the first stroke of the release button is pressed. (S ₂ ) is a release switch that is operated when performing a shooting operation, and is turned on by pressing a second stroke (deeper than the first stroke) of the release button.
(S _WD ) is a one-frame switch that is turned on when one frame of the film is wound. (S _AEL ) is a switch for performing AE lock (exposure lock), and is composed of a normally open push switch. (S _{AF / M} ) is a focus adjustment mode switch for switching between AF and manual focus adjustment.

(S _SE ) is a normally open change data selection switch for selecting data to be changed. (S _FUN ) is a normally open change data enable / disable that switches the enable / disable of the data selected by the change data selection switch (S _SE ) when the mode setting card is installed and the data setting mode is set. This is a changeover switch. (S _EXP ) is a normally open exposure mode combination selection switch for selecting a combination of exposure modes when a mode setting card is mounted and a data setting mode is set. (S _FLM ) is a film detection switch for detecting whether or not a film is loaded, which is disposed on a film rule surface near the spool chamber and which is turned off when a film is present. (S _RC ) is a back cover close detection switch that turns ON when the back cover is closed and turns OFF when opened.
With N, the microcomputer (μC) executes an interrupt routine described later. (S _RW ) is a switch for starting film rewinding, which is turned on when operated, executes an interrupt routine described later, and is turned off when the back cover is opened.
( _SCR ) turns off when an IC card (CD) is inserted
This is an IC card mounting switch that resets the microcomputer (μC ₂ ) of the IC card (CD) when turned off.
(X) is a so-called X contact, which is turned on when one shutter travel is completed, and turned off when the release member (not shown) is charged.

(Sup ₁ ) and (Sup ₂ ) are up switches for switching or adding data to be changed, and (Sdn ₁ ) and (Sd ₁ )
n ₂ ) is a down switch that also performs subtraction. Except for changing the aperture value or shutter speed when the exposure mode is manual mode (M mode), the above switches (Su
p ₁ ), (Sup ₂ ), (Sdn ₁ ), and (Sdn ₂ ) are parallel switches and perform an up function when _{one of the} up switches (Sup ₁ ) and (Sup ₂ ) is pressed, and a down switch. If one of the switches (Sdn ₁ ) and (Sdn ₂ ) is pressed, a down function is performed. When the aperture value or the shutter speed in the M mode is changed, (Sup ₁ ) and (Sdn ₁ ) respectively increase and decrease the aperture value, and (Sup ₂ ) and (Sdn ₂ ) respectively increase and decrease the shutter speed. Perform the function of In the following, an up switch (Sup) indicates one of the switches (Sup ₁ ) and (Sup ₂ ), and a down switch (Sdn) similarly indicates a switch (Sd).
n ₁ ) or (Sdn ₂ ). The operation of the up switch (Sup) and the down switch (Sdn) is detected by the fact that the terminals (Isup) and (Isdn) have each become "L" level. In FIG. 1, a line (WI) common to the above switches is connected to a ground potential point (GND).

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

Next, before describing the operation of the camera of this embodiment, two types of IC cards used here, that is, a mode setting card and a program card will be described.

(I) Mode setting card; This IC card is used to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are deemed unnecessary) or to choose between the two functions. By doing so, it is intended to provide a camera according to the intention of the photographer and the photographing technique. In addition, since unnecessary functions can be omitted, the camera can be simplified and operated well when changing modes. Next, description of the card and display contents performed on the card will be described.

First, the selection of the function of this IC card is (i) 4
Selection of two functions, (ii) selection of exposure mode, (iii) AE
There is a selection of the function of the lock button, and the like. The four functions (i) are: (a-1) a highlight reference / shadow reference exposure function (a-2) an exposure correction function (a-3) a film winding mode switching function (continuous shooting / single shooting) (A-4) A spot AF / multipoint AF switching function, from which a function necessary for a photographer can be selected. Then, as the display related to the selection, of all the display contents shown in FIG.
The one shown in FIG. 2 (b) is prepared. In FIG. 2 (b), (a-1) to (a) are sequentially described from the left side.
-4). If the photographer does not need only the highlight reference / shadow reference exposure function (a-1), the image is displayed as shown in FIG. 2 (c).

With respect to each selected function, the display regarding the use or switching of the function is described in terms of highlight reference... FIG. 2 (d) Shadow reference... FIG. 2 (e) Exposure compensation + side FIG. f) Exposure compensation-side ... Fig. 2 (g) Continuous shooting mode ... Fig. 2 (h) Single shooting mode ... Fig. 2 (i) Spot AF Fig. 2 (j) 2) Multipoint AF: FIG. 2 (k). Regarding continuous shooting / single shooting, spot AF / multipoint AF, even if one of the functions (for example, continuous shooting) cannot be switched, it is always selected. However, since switching is impossible, no display is made.

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

Next, the exposure modes related to the selection of the exposure mode in the above (ii) include (b-1) a program mode (P mode), (b-2) an aperture priority mode (A mode), and (b-3) a manual mode (M mode). (B-4) There is a shutter priority mode (S mode), and the P mode is always set as a basis, and a combination of the remaining three modes (A, M, S mode) can be selected. Accordingly, there are eight combinations of PAMS PMS PASP PAMP P APS P M P, and the display is one of the four modes shown in FIG. 2 (m) (where PROGRAM is represented by P). When the mode is set, the selected combination is displayed, for example, as shown in FIG. 2 (n), and when photographing, one selected exposure mode is displayed [FIG. 2 (o) (A mode selection)].
Is performed. In the P mode, PROGRAM is displayed (FIG. 2 (p)).

Next, the selection of the function of the AE lock button in the above (iii) is as follows. (C-1) While the AE lock button is pressed, the power of the camera is held in the AE lock state. Again in the AE locked state
Pressing the AE lock button or canceling the AE lock state by turning off the power supply will not be displayed during normal shooting. In the case of setting based on the card, the display is as shown in FIG. 2 (q) in (C-1) and as shown in FIG. 2 (r) in (C-2).

In this portion, the shutter speed and the aperture value are normally displayed as shown in FIG. 2 (s). In FIG. 2 (s), 1000 is the shutter speed, and 5.6 is the aperture value.

Next, as an alternative of the function, (d-1) film counter order or subtraction (d-2) with or without auto return at the end of the film (d-3) at the end of rewind Involve the leader part in the patrone or leave it outside the patrone. (D-4) With or without a camera shake warning buzzer (BZ), there are 16 possible combinations. Numbers are given, and are displayed as shown in FIG. 2 (t) at the time of setting and other times. During normal shooting, this part is a film counter.

(II) Program card; The program card includes an exposure program control and various camera controls designed to shoot a moving subject in a relatively bright place with a high-speed shutter that does not shake. (Details will be described later).

Next, the operation of the camera is shown in FIG.
A description will be given based on the flowchart of C), and a detailed description of each unit will be given as necessary.

When the battery (E) is mounted, the battery mounting switch (S _RE ) is turned off, a signal that changes from “L” level to “H” level is input to the terminal (RE), and the built-in clock starts oscillating. A clock is also sent from the microcomputer (μC) to the IC card (CD) via the terminal (φ). Then, the microcomputer (μC) executes the [RESET] routine shown in FIG. In that routine, the microcomputer (μC)
First, an initial setting is performed based on the fact that the battery is mounted (# 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 “L” level. Also, reset all the flags in the RAM and set the flag (BATF) indicating when the battery is installed (# 100 to # 100).
# 110). Thus, the exposure mode is set to the P mode, the spot / multi-point AF is set to the multi-point AF mode, the single shooting (S) / continuous shooting (C) is set to the single shooting (S), and the exposure compensation, highlight (H) / shadow (S) are set. ) Mode is set. Table 3 shows the contents of the function data.

Next, it is detected whether the mode setting card of the above two types of IC cards has been inserted once and the mode setting has already been performed by checking the contents of the E ² PROM (the contents of MSb ₄ described later). . If the setting has not been completed, interrupts other than the IC card insertion interrupt (CDINT) are prohibited, and the process returns (# 135, # 140). If the mode has been set, it checks which mode is set from the contents of the E ² PROM (the contents of MSb ₀ to MSb ₃ described later), and determines a portion for displaying the change data. Highlight / Shadow mode (H /
S mode), the exposure correction mode ₍₊ / _- mode), single shooting / continuous shooting switching mode (S / C mode), the spot / multipoint AF switching mode (S / A mode) and sequentially detects whether the mode setting If it is set, the change data of the first set mode is set (# 145 to # 18).
2). Tables 4 and 5 show the RAM change data and the E ² PROM setting mode data. The above steps (# 145 to # 145)
# 182) is equivalent to determining the position of the cursor described below in terms of display.

Next, control for sending data to the display control circuit (DISPC) is performed to display these setting modes. First, the terminal (CSDISP) is set to “H” level, data communication is notified to the display control circuit (DISPC), data is created, serial communication is performed, and when data transfer is completed, the terminal (CSDISP) is set.
Is set to the "L" level, and the end of serial communication is output to the display control circuit (DISPC) (# 185 to # 200).

Here, the operation in the case of serial communication will be briefly described. First, a clock is output from a serial clock terminal (SCK) according to a serial communication instruction. The output side outputs one bit of data in synchronization with the rising edge of the clock, and the input side inputs one bit of data in synchronization with the falling edge. By performing this as necessary, necessary data can be obtained. FIG. 2 (u) shows a display example of a normal shooting state.

As the display contents, in the example of FIG. 2 (u), the shutter speed [1000], the aperture value [5.6], the AE mode [PROGRA
M], the number of films (including film presence) [17], and the function mode (the graphic shown at the bottom line) are displayed. In the above normal case, and at the time of various settings using an IC card (CD) (details will be described later) It is sufficient to prepare one byte (256 ways of 8 bits) for each display content. The display control circuit (DISPC) inputs and decodes these signals to perform a predetermined display. Now, the data bits of E ² in the PROM on the display portion of the shutter speed and aperture as necessary data (MSb _5), bits of E ² PROM to display the AE mode (MSb ₆ ~MSb _8), the film E ² PROM bits (MSb _{9 to} MSb ₁₂ ) for displaying the number of sheets, E ² PROM bits (MSb _{0 to} MSb ₄ ) for the function mode,
The bits (CDb _{0 to} CDb ₂ ) of the change data are processed by the microcomputer (μC) and given to the display control circuit (DISPC) as display control data.

FIG. 34 (a) shows a display example displayed on the display unit (DISP) in this manner. In the figure, (1) is a cursor. The microcomputer (μC) waits 0.5 seconds at (# 205),
This display is executed for 0.5 seconds. Then, the number of films N ₁ (MSb _{13 to} MSb ₁₈ ) stored in the E ² PROM and the film sensitivity Sv
(MSB ₁₉ ~MSb ₂₄₎ Film number N ₁ of the RAM reads the contents of, transferred to the film sensitivity Sv. Thereafter, the card data communication I for knowing whether or not the IC card is mounted and the type of the IC card is performed (# 210).

The subroutine of the card data communication I is shown in FIG. In the figure, first, the terminal (CSCD) is set to “H” level to notify the IC card (CD) of communication with the IC card (CD), and the data output mode is set to the data indicating the data communication I (the sixth). (See table) is sent to the IC card by serial transfer (# 300 and # 305).

The predetermined time required for inputting this on the IC card (CD) side to create and output necessary data and microcomputer (μC)
Waits (# 310). And this time, the data is an IC card (C
D), it operates in the input mode, performs serial transfer with the IC card (CD) (# 315), and when this is completed, sets the terminal (CSCD) to the "L" level (# 32)
0).

Next, the type of the IC card is determined in (# 321).
In the case of the mode setting card, the data only indicates the type of IC card, so it returns immediately. On the other hand, in the case of the program card, not only the type of IC card but also the continuous / Indicates one of one shot (details will be described later), spot / multipoint in the AF zone, spot / multipoint in the metering zone, continuous shooting / single shooting, or no special designation (photographer setting) Since the function data is included, it is next determined whether or not the card function is selected (# 322). When the card function is selected (CDFNF = 1), the function data Fb ₂ , Fb
b ₃ , Fb ₈ , Fb ₁₂ bits are rewritten and data is set (# 32
3), return. On the other hand, when the card function is not selected, the process returns without performing data rewriting.

Returning to FIG. 4, the microcomputer (μC) determines whether or not an IC card is mounted on the basis of the input data (see Table 7). Return without displaying the type. When IC card is mounted (CKBO = 1), determines the type of the IC card, the mode setting card _{(Ckb 1 ~Ckb 6 = 00 H} , where _H 1
In the case of a hexadecimal number, the display data for this IC card (C
kb _{0 to} Ckb ₆ ) (# 230) and create a program card (Ck
b ₁ ~Ckb ₆ = 01 _H) if the program for the display data (Ckb ₀
~ Ckb ₆ ) is created (# 245). In these cases,
The above data Ck is used as display data on the shutter speed display section.
b _{1 to} Ckb ₆ and IC card mounting data Ckb ₀ are set, and the other display data is set to “0” (not set). These display data are sent to the display control circuit (DISPC) (# 250 to # 260) and displayed for a fixed time (0.5 seconds). FIGS. 34 (b) and (c) show display examples in this case. FIG. 34 (b) shows a display when a program card is mounted, and FIG. 34 (c) shows a display when a mode setting card is mounted. . Here, the characters PRO and F-SE correspond to the bits Ckb _{1 to} Ckb.
₆ depends on CARD and Ckbo depends on Ckbo.

The microcomputer (μC) waits for a predetermined time for this display (# 270), and then permits all interrupts (# 27).
1), proceed to step (# 10) in FIG.

In FIG. 3, when the initial setting (# 5) is completed, an exposure mode change switch (S _EM ) and a function change switch (S _EM )
_FM ), card function enable / disable switch (S _CD ), card data setting switch (S _CDS ), and photometering switch (So) are turned on in step (# 10) at terminal (IP ₅ ). determined by the level, if not ON any of the switch (IP ₅ = "H"), it is determined whether the battery attachment flag (BATF) has been set at step (# 15), it is set If it is, after the battery is installed, it is assumed that nothing has been performed and that this step has been reached, and the process jumps to step (# 45), and controls the turning off of the display and stopping the IC card (CD) according to the flow of step (# 45) and subsequent steps. I do. First, all data is set to "0" (not set), and this data is output to the display control circuit (DISPC) (# 45 to # 60). Therefore, the display is completely turned off. It should be noted that a command for turning off all lights is provided, and this is output to the display control circuit (DISPC).
PC) may be turned off entirely.

The microcomputer (μC) sends the sleep sign (instruction to stop the IC card) signal to the IC card (CD) after sending the turn-off data to the display control circuit (DISPC) as described above (# 65).
~ # 75). This sleep sign is formed by setting both the bits Csb ₀ and Csb ₁ to 1 as shown in Table 6.

Thereafter, the transistor (Tr ₁ ) is turned off by setting the terminal (PW) to “L”, and the flag (AE) indicating AF lock is set.
LF) and the flag (BATF) indicating when the battery is installed are reset, and all interrupts are permitted and stopped (# 77 to # 9).
Five). The stop (HALT) also stops the oscillation of the internal clock.

In the above step (# 10), five switches (S
_{EM), (S FM),} (S CD), and resets the (S _CDS), (one of So) proceeds to step (# 90) if the turned ON, flag indicating when the battery attachment (BATF) At the same time, in the next step (# 100), a flag (OPF) indicating that one of the five switches has been operated is set, the routine [SO] is executed, and the process returns to the step (# 10). The routine [SO] is a routine for performing photometry, AF, display, exposure control, and the like, which will be described later in detail.

In step (# 10), if none of the above five switches is ON and the battery is not installed (BA
In TF = 0), it is determined whether or not a flag (OPF) that is set when the routine has passed the routine [SO] is set (# 15, # 25). When this flag is set, the timer (T ₁ ) for holding the power is reset and started, and the flag (OPF) is reset (# 30, # 35).
Here, the timer (T ₁ ) is reset and started (#
30) Once from step (# 10) to (# 90) (# 10
After passing through the routine (# 100) after 0), the power supply holding is extended for a certain period of time considering that there is a possibility that the above five switches are not turned on at present but may be turned on again. The reason why the flag (OPF) is reset (# 35) is to indicate that the step (# 30) has been passed.

If the flag (OPF) is not set in step (# 25), steps (# 30) and (# 35) are skipped, and the reset-start timer is set to 10
It is detected whether or not seconds have elapsed (# 40), and if 10 seconds have elapsed (# 45), the process proceeds to the steps after step # 5 to turn off the display and stop the IC card (CD). If 10 seconds have not elapsed, the process proceeds to step (# 110), and the [SO] routine is repeated.

Next, the control of the camera when the IC card (CD) is mounted will be described. When the IC card is mounted, a signal that changes from "L" level to "H" level is input to the terminal (CDINT), and FIG. The [CDINT] interrupt routine shown in (1) is executed. Then, when entering this routine, the microcomputer (μC) sets the flag (OPE) to stop driving the lens and hold the power (# 290, # 292). Then, a flag (CDFNF) is set to forcibly add the card function (# 29).
3) Also, a flag (CDIF) is set so that the display indicating the card type is not performed in the display control described later (# 29).
Four). By setting this flag, the type of the mounted card is always displayed for the first time in the routine [SO] after the card is mounted. Next, in order to give top priority to the display of the type of the mounted card, all other interrupts to this flow are prohibited in step (# 295), and the process proceeds to step (# 210) and subsequent steps. After the type is displayed for a fixed time as shown in FIG. 34 (b) or (c), all interrupts are permitted and the original flow [step (# 30) in FIG. 3]
Return to Switches (S _EM ), (S _FM ), (S _CD ), (S _CDS ), (So) with the interrupt enabled
Any one of them is turned ON and the interrupt pin (INT ₁ )
When input signal transits from the "H" level to the "L" level, the device goes to an interrupt [INT _1] shown in FIG. 3, performing the step (# 90) after the flow.

Note that the clock starts oscillating regardless of which interrupt [INT ₁ ] [INT ₂ ] or [CDINT] is applied in the stopped (HALT) state. A clock (φ) is sent.

Next, the routine [SO] will be described with reference to FIG.

First, the interrupt of [INT ₁ ] for this flow is prohibited (# 400). This is because if an interrupt [INT ₁ ] shown in FIG. 3 occurs during this control, the control operation does not proceed. Next, in (# 405), the terminal (P
W) to “H” level, and PN via inverter (IN ₁ )
And ON the transistor (Tr ₁₎ by applying base a low level of P-type transistor (Tr _1), photometric circuit (LM), supplying power to the AF circuit (AF _CT) and the like. Next, input information specific to the interchangeable lens from the lens circuit (LE) (#
410). This is shown in FIG. 7 and explained. First, the terminal (C
SLE) is set to the “H” level (# 600), and serial communication is performed to input information from the lens (# 605). This information includes the presence or absence of a lens and the F-number (Av
o), maximum aperture value (Avmax), distance information, focal length information,
Coefficient for converting the defocus amount to the lens drive amount (hereinafter, referred to as
This is referred to as “K value”). When the input of the lens information is completed, the terminal (CSLE) is set to the “L” level and the process returns (# 610).

Returning to FIG. 6, the microcomputer (μC) continuously inputs information of the electronic flash device from the electronic flash device (ST). As the information, there are three pieces of information such as a guide number (GN) indicating a light emission amount, whether or not charging is completed, forced light emission, and automatic light emission (this will be described later). Here, the operation of the information communication method will be described. First, FIG. 9 (a) shows a circuit diagram of the electronic flash device (ST), FIG. 9 (b) shows a circuit diagram of the interface (IF), and FIG. 8 shows a flow chart of data input from the electronic flash device of the camera. Will be described.

In FIG. 8, the microcomputer (μC) is connected to the terminal (CSST).
Is set to the “H” level for a fixed time (t ₁ ), and this signal is output to the electronic flash device (ST) (# 650). The electronic flash device (ST) detects the time (t ₁ ) of this signal, recognizes it as the data output mode, and outputs data according to the clock from the microcomputer (μC) (# 655).

The interface circuit (IF) shown in FIG. 9 (b) outputs the signal of the terminal (CSST) of the microcomputer (μC) to the terminal (ST ₁ ) of the electronic flash device via the OR circuit (OR ₂₁ ). At this time, the signals input to the OR circuit (OR ₂₁ ) are both at the “L” level. In the electronic flash device (ST), the signal from the terminal (ST ₁ ) is input to the AND circuit (AND ₁₁ ), so that the AND circuit (AND ₁₁ ) is activated, and the signal from the oscillation circuit (OSC) is counted by the counter (CNT). ₁₂ )
Output to The counter counts this and measures the time (t ₁ ). When the time (t ₁ ) is measured, the terminal (T ₁ )
Is set to the “H” level, and the RS flip-flop (SR ₁₁ ) is set. At this time, the RS flip-flop (SR ₁₂ ) remains reset, and its output is at “H” level. Therefore, the AND circuit (AND ₁₂ ) is activated.

Next, the microcomputer (μC) outputs a serial communication clock (SCK). This clock (SCK) is output to the terminal (ST ₁ ) of the electronic flash device (ST) via the OR circuit (OR ₂₁ ) of the interface circuit (IF). In the electronic flash device (ST), the input clock serial clock (SCK) is through the AND circuit (AND _12), input to the terminal of the clock for parallel / serial conversion circuit (P / S). The parallel / serial conversion circuit (P / S) outputs a guide number (GN), a signal indicating a charging completion state, and a signal indicating whether forced light emission or automatic light emission is synchronized with a clock. The counter (CNT ₁₁ ) of the electronic flash device (ST) counts the input clock (SCK) and outputs an “H” level to the OR circuit (OR ₁₁ ) when a predetermined required number is counted. This signal is connected to the OR circuit (OR
_11), it is input to the reset terminal of the counter (CNT ₁₂₎ via a one-shot circuit (OS _11), the counter resets. The counter (CNT ₁₁ ) is a counter that resets when a predetermined number of clocks are counted.

The electronic flash device includes a battery ( _EST ) as a power source in addition to the above-described circuit elements, a booster circuit (UV) for boosting the voltage of the battery to a voltage required for flash light emission, and a booster circuit (UV). Rectifier diode (D ₁₁ ) for rectifying the output voltage of the main capacitor (MC) for storing the energy required for flash light emission, a charge voltage detection circuit (CVD) for detecting the charge voltage of the main capacitor (MC), A light emission control circuit (FCC) for controlling start and stop is provided.

Returning to FIG. 6, after inputting the flash data, the microcomputer (μC) performs card data communication I with the IC card (CD) to determine the type of the IC card (CD) (# 420). Since the card data communication I has already been described with reference to FIG. 5, the description is omitted here. After the card data communication, a flag (SE) indicating that the IC card is mounted and the data setting mode is set.
TF) is set (# 425) to determine whether
If not set, AF start switch (S ₁ ) is ON
It is determined based on the level of the terminal (IP ₆ ) whether or not it has been performed (# 427). When the switch (S ₁ ) is ON (IP ₆ = “L” level), AF control is performed (# 429).
On the other hand, when the flag (SETF) indicating the data setting mode is set, or when the switch (S ₁ ) is turned off (IP ₆ =
When the signal is at the “H” level, a signal for stopping the AF drive motor is output to the lens control circuit (LECN) to stop the lens drive (# 431) and AF is performed in order to inhibit the AF operation. Set the flag (AFNF) indicating that there is no
Five). When this manner data setting mode is set, by prohibiting the AF control priority data setting, AF start switch (S ₁₎ by mistake during the data setting is the AF operation is performed even if pressed I try not to.

Here, FIG. 10 (a) and FIG.
The flowchart shown in FIG. 11B will be described with reference to FIG. 11 showing a focus detection range in a shooting screen. At this time, the photometric range will also be described.

First, in FIG. 11, an outer rectangle (2) indicates a shooting screen. Among them, (LM ₁ ) to (LM ₄ ) indicate the photometry range, and (AF ₁ ) to (AF ₃ ) indicate the focus detection range. With respect to the focus detection range, the camera has a switchable spot / multipoint AF, when selecting the spot AF is, AF is performed based on the subject information of the focus detection range (AF _2), the multipoint AF There when it is selected, AF to the object is brought into focus closest to the camera from the above three ranges _{(AF 1) ~ (AF 3} ) is performed. Hereinafter, (AF ₁ ) is the first
Island, (AF ₂ ) second island, (AF ₃ ) third
I will call it an island.

To explain the AF control shown in the flowchart of FIG. 10A, first, it is determined whether or not a lens is mounted based on an input signal from the lens (# 705). Then either the terminal when the lens is mounted is the focus adjustment mode AF mode determines the level of _{(IP 10) (# 710)} . Then, the lens is not mounted in step (# 705), or if not AF mode (# 710) (the manual mode, IP ₁₀ = "H" level), A
A flag (AFNF) indicating that F is not performed is set and the routine returns (# 800).

On the other hand, when the AF mode is selected (IP ₁₀ = “L”
Level) is a flag (AFN) indicating that AF is not performed.
F) is reset (# 715). The microcomputer (μC) controls the accumulation (integration) of charges generated in accordance with the amount of incident light in the CCD for distance measurement, and after completion of the integration, inputs data obtained by digitally converting the integrated value (# 720). , # 725).
Then, whether or not spot AF is detected (detected by Fb ₂ of the function data) is detected. If spot AF (Fb ₂ = 1), a flag indicating that AF is being performed based on the second island ( AF2F) sets, defocus amount of the second island of (DF ₂₎ calculated from the input data, which is referred to as a lens drive amount of defocus (# 735～ # 745).

On the other hand, when the multi-point AF mode is selected,
The defocus amounts (DF) of the second and third islands are calculated, and the defocus amount for the subject closest to the camera is calculated (# 750 to # 765). The subroutine for determining the defocus amount is shown in FIG. 10 (b). The defocus amount is negative when the front focus (the subject is far from the focus position of the lens), and the rear focus (when the subject is In the case of (the camera side from the focus position of the lens), a positive defocus amount is indicated, and its absolute value indicates the magnitude of the defocus, and three islands are required to detect a subject closest to the camera. It is sufficient to detect the maximum (including positive and negative) defocus amounts among the defocus amounts described above, and it is assumed that the main subject exists in the focus detection area.

In FIG. 10 (b), the microcomputer (μC) first resets the flags (AF1F to AF3F) indicating the island, detects the largest defocus island, and uses the detected island defocus amount as the lens driving defocus amount. The above flags (AF1F to AF1) according to the island
3F) and return (# 810 to # 865).

Returning to FIG. 10 (a), the microcomputer (μC) determines whether or not the lens is in focus based on the lens driving defocus amount (# 770). AFE
Set F) (# 780). Then, the in-focus buzzer sounds for a certain period of time, and this is notified (# 782), and the routine returns. If focus is not achieved at step (# 770), one-shot AF (stops lens driving once focus is achieved and focus detection can also be stopped at this time) or continuous AF (after focusing) The object C also follows the subject, and determines whether to drive the lens according to the obtained defocus amount) based on the data Ckb ₈ (this will be described later) (# 782). In the case of one-shot AF (Fb ₈ = 0), it is determined whether or not a flag (AFEF) indicating in-focus is set (# 78).
Judge in 3), and if set, return. If not set or continuous
In the case of AF (Fb ₈ = 1), the process proceeds to step (# 785) to control the lens drive. In step (# 785), the lens driving amount (N) is calculated by multiplying the defocus amount (DF) by the K value. Next, in step (# 790), the lens is driven, and the step (# 795) is performed. ) To reset the flag indicating the focus (AFEF) and return.
The lens drive in this step (# 790) is performed by the lens drive circuit (LECN) driving the lens by a value corresponding to the drive amount (N).

Returning to FIG. 6, the microcomputer (μC) controls change of various data by operating various key switches (# 440).

This is shown in FIG. 12 and described. First, the state of each key switch is confirmed and stored in memory (# 900). Next, it is determined (# 905) whether or not a flag (SETF) indicating the card setting mode is set, and the flag (SHT) is set.
When F) is set, the process proceeds to step (# 930) so as not to change the exposure mode and the function. Flag when (SETF) is not set, step exposure mode changing switch proceeds to (# 910) (S _EM) is ON
It is determined whether or not it has been performed. If the switch ( _SEM ) is ON, the process proceeds to the subroutine (# 915) for this change and returns (details will be described later). If the switch ( _SEM ) is not turned on, the process proceeds to step (# 920) to determine whether the function change switch ( _SFM ) is turned on. And this switch (S _FM )
Is turned on, the subroutine for that change (# 92
Go to 5) and return.

Here, the two subroutines of FIG. 13, the FIG. 14 respectively indicate explained, is a exposure mode change First, sequentially P → A each time the up switch (Sup ₁ or Sup ₂₎ is ON 1 times → S → M, then return to P, cyclically, and down switch (Sdn ₁ or Sdn ₂ ) turns ON once
Each time it is performed, it sequentially proceeds in the order of P ← A ← S ← M, and after P, it proceeds cyclically in the opposite direction to the above-mentioned upward direction so as to proceed to M. The mode is changed according to the set exposure mode, and the mode not selected is skipped.

This will be described with reference to FIG.
C) is the up switch (Su) in step (# 1000).
It is determined whether or not p ₁ or Sup ₂ ) is turned on. If it is not turned on, the process proceeds to step (# 1055). Proceeds to step (# 1005) when being turned ON, examine RAM of the feature data (Fbn) to (Fb ₀₎ (Fb _1), P mode is to determine whether the currently selected as the exposure control mode is selected If so, the process proceeds to step (# 1010) to determine whether the A mode is selected by the IC card based on (Msb ₆ ) to (Msb ₈ ) (see Table 4) of the internal E ² PROM and is selected. If so, the exposure mode is changed from P to A, the function data (Fb ₀ , Fb ₁ ) is changed from (0,0) to (0,1), and the process returns (# 1015). In the above step (# 1010)
If it is determined that the A mode has not been selected by the IC card, the process proceeds to step (# 1025) to determine whether the S mode has been selected. If the S mode has not been selected, the process proceeds to step (# 1040). Then, the process goes to ()) to search for the mode selected by the card. Then, if there is a selected mode, it is set. And A, S, M
When the mode is not selected, that is, when only the P mode is selected, the P mode is set (# 1050).

Similarly, when the A mode is selected as the control exposure mode (Fb ₀ , Fb ₁ = 0, 1), the S mode is selected by the IC card, or the M mode is set when it is not selected. Judge whether the selected mode is selected, change the exposure mode to the selected mode, and set bits (Fb ₀ ) and (Fb ₁ )
And return (# 1020 to # 1030).

Now, when the S mode is selected as the control exposure mode (Fb ₀ , Fb ₁ = 1, 1), it is determined whether the M mode has been selected by the IC card.
If the mode has not been selected, the mode is set to the P mode and the process returns (# 1035 to # 1045). If the control exposure mode is not the S mode, that is, if the control exposure mode is the M mode, then the P mode is set. This is because the P mode is always selected in this embodiment.

When the down switch (Sdn ₁ or Sdn ₂ ) is ON in step (# 1055), the above-described up switch (Sup ₁ or Su
p ₂₎ omitted since by performing the same control as.

When both switches (Sup) and (Sdn) are OFF, the process returns without doing anything.

Next, the function change switch (S _FM ) shown in FIG.
The control when N is performed will be described. The microcomputer (μC) has four functions, namely, highlight / shadow (H /
S), exposure compensation ₍₊ / _-), single shooting / continuous shooting (S / C), Spot A
E ² P whether any one of F / Multi-point AF (S / A) is selected
Detected by the bits of the ROM (Msb _{0 to} Msb ₃ ), and if none of these bits are set, the process returns as there is no mode selection (# 1200). If at least one is set, it is determined that at least one mode is selected, and a step for changing data (# 120)
5) Execute the following flow. The microcomputer (μC) determines whether or not a switch (S _SE ) indicating a function to be changed is turned on.
H / S → ₊ / _- → proceed with the S / C → S / A, if the next S / A is proceed to as cyclic called Back to the H / S, which function by the IC card is not selected , Is to jump over it. In step (# 1210), when the function to be changed indicates the H / S mode (CDb ₀ , CDb ₁ , CDb _{2 of} RAM data shown in Table 5 = 0, 0, 0), ₊ / _- E or the mode is selected by the IC card in step (# 1215) ² PROM
Judged by the bit (MSb _{1), +} / _- when the mode is selected, ₊ / _- and mode data change mode, the process returns as data _{CDb 0 ~CDb 2 = 0,0,1 (#} 122
0). ₊ / _- When the mode is not selected step (#
1227) and check if S / C mode is selected (MSb
₂ ) and when this is not selected (MSb ₂
= 0), the process proceeds to step (# 1240) to determine whether the A / S mode is selected by (MSb ₃ ). If this is not selected (MSb ₃ = 0), the process further proceeds to step (# 1240). # 12
Proceed to 50) to determine whether the H / S mode is selected (MSb ₀ ). Now, at least the H / S mode is selected, so that CDb _{0 to} CDb ₂ = 0,
Set to 0,0. S / C mode, when the A / S mode is selected, sets the CDb ₀ ~CDb ₂ in order to a mode to change this. Similarly, the following modes of the mode of function should be changed now (H / S mode if ₊ / below _- mode, ₊ / _- mode if S / C mode, if S / C Mode S / A mode, S / A mode Nara H / S mode), it is determined whether it is selected by the card, the change mode if is selected as the next mode, if it is not selected _{H / S → + / - →} S / C → S IC in the order of / A → H / S ……
Searching the function that is selected by the card, and sets the data CDb ₀ ~CDb ₂ as a function to change the function that has been selected, the process returns.

As can be seen, modes not previously selected by the card will be skipped over in the change mode. For example, changeable mode Selected is ₊ / _- and 2 S / C
If the function change switch (S _FM ) is pressed, the flow goes to step (# 1225), where the flow goes to step (# 1227), and the S / C mode becomes the mode to be changed. Speaking on the display this cursor ₊ / _- means moving from the S / C. Next, the function change switch (S
_{When FM} ) is pressed again, the flow goes to step (# 1235), from which step (# 1240) → (# 1250) → (#
1215), and stepping, ₊ / _- is the cursor on the display becomes the mode should be changed ₊ / _- to move to. In these cases, since the H / S mode and the A / S mode are not selected, the setting of the change mode is substantially skipped.

In step (# 1205), the switch (S _SE ) is turned on
If not, go to step (# 1265). In step (# 1265), the up switch (Sup ₁ or Sup ₂ )
It is determined whether or not the function is ON. If the function is ON, the function to be changed is determined based on data (CDb _{0 to} CDb ₂ ). mode is determined by the data _{(Fb 6) (Fb 7)} , in order to transition to the next mode (→ H → S → advance None H / S to cyclic), data _{(Fb 6), (Fb 7} ) (# 1270, # 127
5), return.

Features ₊ / _- exposure compensation amount if mode (# 1285) (△ Ev) 0.5 was added, the process proceeds to the subroutine (# 1287) and determines its size. This subroutine is shown in Figure No. 14 (b), the correction amount (△ Ev) is a data Fb _4, Fb ₅ = 0,1 as if any positive side correction positive, - data Fb ₄ if side correction , Fb ₅ = 1, 0, and if the correction is zero, the data Fb ₄ , Fb ₅ = 0, 0 is determined as no correction, and the process returns (# 1350 to # 1370).

Returning to FIG. 14 (a), if the mode is the S / C mode, it is determined whether the current mode is single shooting (S) or continuous shooting based on the data (Fb ₃ ), and the mode is opposite to the current mode. (# 1295) and return. The above three modes (H /
S mode, ₊ / _- mode, when not one S / C mode), namely S / A mode spot is now the mode AF when the
It is determined whether (S) is a multi-point AF (A) by the data (Fb ₂ ) and the data (Fb) is set to be opposite to the current mode.
b ₂ ) is changed (# 1300) and the routine returns.

When the up switch (Sup ₁ or Sup ₂ ) is not turned on in step (# 1265), the process proceeds to step (# 1305), and it is determined whether the down switch (Sdn ₁ or Sdn ₂ ) is turned on. If not, return. When it is ON, when changing the mode in H / S mode,
That the order of the change is reversed (no ← H ← S ← H / S ←), also ₊ / _- from exposure correction amount as long as the mode (△ Ev) 0.5
Up switch (Sup ₁ or Su)
Since p ₂₎ is the same as the flow when ON, the description will be omitted (# 1310～ # 1340).

Referring back to FIG. 12, when both the exposure mode change switch (S _EM ) and the function change switch (S _FM ) are OFF, the up switch (Sup ₁ , Sup ₂ ) and the down switch (Sdn ₁ , Sdn ₂ )
The process proceeds to a step (# 927) showing a subroutine for changing the aperture value (Av) and the shutter speed (Tv).

This subroutine is shown in FIGS. 21 (a) and 21 (b) and will be described. First, the microcomputer (μC) operates the up switch (Sup ₁
Or, check if Sup ₂ ) is ON or not (# 1800)
In the judgment, it determines whether the step If not ON down switch proceeds to (# 1805) (Sdn ₁ or Sdn ₂₎ is ON, when not ON, the process returns. When the up switch (Sup ₁ or Sup ₂₎ is turned ON, the flow advances from step (# 1800) to step (# 1810), determines whether the M-mode. Here, when the mode is the M mode (Fb ₀ , Fb ₁ = 1, 0), the second up switch (Sup ₂ ) is turned on.
It is determined whether or not it has been performed (# 1825). When it is ON, it adds 0.5Ev to the current shutter speed (Tv) to change the shutter speed (Tv) and sets a new shutter speed (Tv) value, which is the maximum shutter speed value that can be controlled by the camera ( Tmax) is determined (# 1850, # 1855). If this value is exceeded,
The maximum shutter speed (Tvmax) as the shutter speed (Tv) value. If the shutter speed is not exceeded, the process returns without doing anything (# 1860).

In step (# 1825), the second up switch (Sup ₂ )
When it is not turned on, that is, the first up switch (Sup ₁ )
Is turned on, it is determined that the aperture value change mode is set, and in step (# 1830) 0.5Ev is added to the aperture value (Av), and whether or not this exceeds the maximum controllable aperture value (Avmax) is determined. Judge (# 1835). If it has exceeded, the maximum aperture value (Avmax) is set as the aperture value (Av) (# 1840). Judge whether or not
If the mode is the P mode, the process proceeds to step (# 1905) in the flowchart of FIG.
v) Down 0.5Ev. When the mode is not the P mode, the process returns.

If the mode is not the M mode in step (# 1810), the process proceeds to step (# 1815) to determine whether the mode is the P mode or the A mode, and either the P mode or the A mode (Fb
_0, proceed to if Fb ₁ = 0,0 or 0,1) a step (# 1830), the up control aperture value (Av), neither, that is, when it is the S mode (Fb _0, Fb ₍₁ = 1,1) proceeds to step (# 1850) to control the shutter speed (Tv) to increase.

In step (# 1805), use the down switch (Sdn ₁ or Sd
If n ₂ ) is ON, the process proceeds to step (# 1865) in FIG. 21B, and it is determined whether or not the mode is the M mode.
In the mode (Fb ₀ , Fb ₁ = 1, 0), it is determined whether the second down switch (Sdn ₂ ) is ON (# 188)
0). If the second down switch (Sdn ₂ ) is ON, 0.5 Ev is subtracted as the shutter speed (Tv) down, and the process returns (# 1905). Second down switch (Sd
When n ₂ ) is OFF, the aperture value (Av) in step (# 1885)
As down, 0.5Ev is subtracted, then step (# 189
At 0), it is determined whether or not the value is smaller than the open aperture value (Av ₀ ). If it is smaller, the aperture value is set to the open aperture value (Av ₀ ) (# 1895).

Next, it is determined in step (# 1900) whether or not the mode is the P mode. In step (# 1890), if the aperture value (Av) is not smaller than the open aperture value (Av ₀ ), the process skips step (# 1895) and enters step (# 1900). If it is determined in step (# 1900) that the mode is the P mode, the process proceeds to the control flow (# 1850 to # 1860) for increasing the aperture value in FIG. 21A, and returns if the mode is not the P mode.

In step (# 1865), if the mode is not the M mode,
In steps (# 1870) and (1875), P mode or A
It is determined whether the mode is the mode. If the mode is the P mode or the mode is the A mode, the process proceeds to the flow for controlling the aperture value down from step (# 1885). Proceeding to # 1905), the shutter speed is reduced.

Returning to FIG. 12, a step (# 92) showing a subroutine for changing the aperture value (Av) and the shutter speed (Tv) described above.
After 7), or after it is determined in step (# 905) that the flag indicating the card setting mode is set, the process proceeds to step (# 930). In the step (# 930), if the enable function set by the card, normally open switch to disable (S _CD), it is determined whether it is ON, and is turned ON, the step (#
935) Card function enable / disable switch on (S _CD ON)
To the subroutine.

This is shown and described in FIG. First, the steps (# 14
In (00), it is determined whether or not an IC card (CD) is loaded in the camera based on the data (Ckb ₀ ). If the IC card is not loaded (Ckb ₀ = 0), the routine immediately returns. If the mode setting card is loaded, determines been operated card function valid / invalid switch (S _CD) is, whether the flag indicating that through the flow time (CDF) is set (# 1405). If it is set, the operation returns assuming that the valid / invalid switching has already been performed during the operation. If not set, proceed to the next step (# 1410) and set this flag (CD
F) is set, and in step (# 1415), a flag (CDFNF) indicating whether the card function is valid / invalid is determined. If not set, the card function is set to valid (# 1420), and the card function is set. If so, reset and disable the card function (# 1425) and return.

The flow when the card function enable / disable switch (S _CD ) is ON in the determination in step (# 930) in FIG. 12 has been described with reference to FIG. 15 as described above. function valid / invalid switch (S _CD) is the time of OFF operation proceeds to step (# 940).

The flow of this step (# 940) will be described with reference to FIG. 16. First, in step (# 1450), it is determined whether or not an IC card is mounted, and if the IC card is not mounted (data Ckbo = 0) returns, and when an IC card is loaded (Ckbo = 1), the flow proceeds to step (# 1455), and the flow after step (# 1405) in FIG.
It is determined whether or not the flag (CDF) indicating that the pass has been passed is set. If the flag (CDF) is set, in the next step (# 1460), the flag is reset and the routine returns. If the flag (CDF) is not set, the routine returns.

Returning to FIG. 12, the microcomputer (μC) next proceeds to step (#
945) Normally open switch (S _CDS ) to set or reset the mode change by IC card or data setting mode
Is determined as ON or OFF, and if this is ON or OFF, the steps (# 955),
Return through (# 950). This is shown in Figs.
This will be described with reference to FIG.

First, FIG. 17 shows a subroutine when the switch (S _CDS ) is turned on. In step (# 1500), the microcomputer (μC) determines whether a mode setting card is mounted, and the card is mounted. If not (Ck
_{b 1 ~Ckb 6 ≠ 00 H)} , soon to return. The case where the mode setting card is inserted _{(Ckb 1 ~Ckb 6 = 00 H} ),
It is determined whether a flag (CDSF) indicating that this flow has been passed once is set (# 1510). If it is not set, it is set (# 1515). Skip (# 1515) and return.

Next, explaining the subroutine of OFF of the switch shown in FIG. 18 (S _CDS), whether first mode setting card is mounted is determined in step (# 1550), not mounted (Ckb ₁ CCkb ₆ ≠ 00 _H ), return. Even if fitted _{(Ckb 1 ~Ckb 6 = 00 H} ), a flag indicating that the operation switch (S _CDS) has performed a flow of the [S _CDS ON] (CDF) is set If the flag (CDF) is not set in the step (# 1555) for determining whether or not the
555). When the flag (CDF) is set,
The switch (S _CDS ) has been turned ON and OFF to enter or cancel the data setting mode, and a flag (SET
It is determined whether or not F) is set (# 1560).
As a result, when it is determined that the flag is set, the flag (SETF) is reset in step (# 1570),
Subsequently, in step (# 1572), a flag (WRTF) indicating data writing to the E ² PROM is set, and it is determined that the release of the data setting mode by operating the switch (S _CDS ) is completed.
In step (# 1575), the flag (CDF) is reset to release the data setting mode. If the flag is not set, the flag (SETF) is set (# 1565) and the flag (CDS
F) is reset (# 1575) and the routine returns.

When the control of the key setting shown in FIG. 12 is completed as described above, the microcomputer (μC) returns to the step (#) in FIG.
440) to step (# 442), where a flag (SET) indicating that the IC card is mounted and that the mode is the data setting mode is set.
It is determined whether or not F) is set, and if it is set, the process proceeds to step (# 455) to execute a card data communication II routine described later. If not set, the process proceeds to step (# 445) and the photometric data is transferred to the photometric circuit (L
M) to create a spot metering value to be used for exposure. Here, the creation of the photometric value will be described with reference to the photometric range shown in FIG. 11 and the flowchart of inputting and creating photometric data of the microcomputer (μC) shown in FIG. In FIG. 19, first, the microcomputer (μC) determines in step (# 1600) whether or not a flag (AELF) indicating AE lock is set. When the flag (AELF) is set, The process returns because the photometric value is not updated. When the flag (AELF) is not set, the terminal (CSLM) is set to “H” level and the photometric circuit (LM)
, And issues a photometric data output command to perform serial communication (# 1605, # 1610).

With this communication, the luminance values (Bv _{1 to} Bv ₄ ) of the _four photometric ranges shown in FIG. 11 are input. When the communication is completed, the terminal (CSLM) is set to the “L” level (# 1615). Then, it is determined whether the spot metering in the next step (# 1620) is selected, when the selected (Fb ₁₂ = 1), the spot photometric range luminance value (LM ₂₎ (Bv ₂₎ Value (Bvsp) (# 1660). If the mode is the multi-point mode (Fb ₁₂ = 0), the process proceeds from step (# 1620) to (# 1622), and it is determined whether or not the flag (AFNF) indicating that focus detection is impossible is set. Sometimes, the step (#
1660), and returns the small photometric range (LM ₂ ) at the center as a spot value (Bvsp). Flag (AFNF)
Is set, the image magnification β is calculated based on the distance information and the focal length information input from the lens as β = focal length /
In addition to calculating from the distance (# 1625), the next step (# 16)
In 1630), it is determined whether or not the image magnification β is equal to or more than a predetermined value (K), and the size of the subject occupying the shooting screen is determined. If the value is equal to or larger than the predetermined value, the subject is determined to be large, and the photometry ranges (LM ₁ ), (LM ₂ ) and (LM ₃ ) are determined in step (# 1640).
The average of the luminance values (Bv ₁ ), (Bv ₂ ), and (Bv ₃ ) is set as the spot metering value (Bvsp), and the process returns.

If the image magnification β is less than the predetermined value, the photometry range including the focus detection range used for focus detection is set as the photometry value (Bvsp) of the main subject. In the present embodiment, the focus detection range is determined based on which flag (AF1F to AF3F) indicating the focus detection range is set. If the flag (AF1F) is set, the photometric range (LM ₁ ) Brightness range (Bv ₁ ), photometry range (LM ₂ ) when flag (AF2F) is set
Luminance values (Bv _2), that is, when neither flag is set, the luminance values of the photometric range when defocus amount of the third island (AF ₃₎ is selected (LM ₃₎ (B
v ₃ ) as the spot metering value (Bvsp) (# 1645 to # 16)
1665).

When the spot photometric value is determined in this way, the microcomputer (μC) proceeds to step (# 450) in FIG.
The control relating to the E lock is performed, and this will be described with reference to the flowchart shown in FIG. It should be noted that, here, to the cancellation of the AE lock, takes much AE lock while the AE lock switch (S _AEL) has been pressed the and pressed one time, or the power supply is pressed again AE lock switch (S _AEL) There is a mode in which AE lock is released when self-hold is released (10-second hold mode), and a mode in which AE lock is set only while the AE lock switch is pressed. These modes are selected by the IC card. You. In FIG. 20, the microcomputer (μC) firstly proceeds to step (# 1700)
Which of the above two modes is selected is determined based on the data (MSb ₅ ) of the E ² PROM. When the mode is the 10-second hold mode, the process proceeds to step (# 1705) and the AE lock switch (S _AEL ) It is determined whether or not is turned ON. If not, the AE lock switch is operated and step (# 17) is performed.
05) Flag indicating that the flow after step (AE ON)
F) is reset (# 1710) and the routine returns.

In step (# 1705), the AE lock switch (S
_{If (AEL} ) is ON, it is determined in step (# 1715) whether or not the flag (AE ONF) is set. If it is set, the process returns immediately. If it is not set, the process proceeds to step (# 1720) to determine whether a flag (AELF) indicating that the AE lock operation is working is set, and if the flag (AELF) is not set, Assuming that operation was performed to perform AE lock, set this (# 1730), and if the flag (AELF) was set, reset the flag (AELF) as being operated to release the AE lock during operation Then, the process proceeds to step (# 1735), and the flag (AE ONF) indicating that the AE lock switch (S _AEL ) has been operated and this flow has been executed.
Set and return.

In step (# 1700), if it is not the 10-second hold mode, it is determined in step (# 1740) whether or not the AE lock switch (S _AEL ) is turned on. If not, the flag (AELF) is turned on. Reset (# 175
Five). If it is ON, the flag (AELF ₁ ) is set (# 1745), the timer (T ₁ ) for holding power is reset and started (# 1750), and the routine returns. Thus, when the AE lock switch (S _AEL ) is ON, the power is kept.

In FIG. 6, when the control of the AE lock is completed, the microcomputer (μC) performs data communication with the card for the second time in step (# 455). This data communication will be described with reference to FIG. 5 (b). In step (# 325), the microcomputer (μC) determines whether or not a card is mounted, and if the card is not mounted (CKbo = 0) ) Return without performing data communication. When a card is mounted, the terminal (CSCD) is set to the “H” level (# 330), and data is output to the IC card (CD) (# 335), indicating that the IC card is on the input side. Then, step (# 340)
IC card mounted on the camera it is determined whether a mode setting card in the case is an IC card of the data setting mode _{(CKb 1 ~CKb 6 = 00 H} ), of the Fig. 12 step (# 900 ) Set the switch data that has been sensed and stored in (# 344) and perform serial communication (# 34).
8) Output switch information to IC card (CD). Thereafter, the terminal (CSCD) is not set to the “L” level (# 35
0), return.

If it is not a mode setting card in the determination in step (# 340), that is, if it is a program card (CKb ₁
~CKb ₆ = 01 _H), exposure calculation data is data necessary for the exposure operation, set the flash data, and lens data, performs serial communication, IC these data
The data is output to the card, the terminal (CSCD) is set to the "L" level, and the data communication ends, and the process returns (# 346 to # 350).

The exposure calculation data includes photometric values (Bvs), (B
_VAV ) There are data indicating film sensitivity (Sv) and whether the film is positive film or negative film. Lens data includes focal length data, open F value (Avo), maximum aperture value (Avmax)
However, as the flash data, data indicating whether the flash is forcibly fired or auto, the flash not attached (power off
GN (guide number) indicating whether or not charging has been completed, and data indicating whether charging has been completed.

After completing the above card data communication (II) in FIG.
The microcomputer (μC) proceeds to step (# 460) and performs an exposure calculation here.

The flow of this control will be described with reference to FIGS. 22 to 26. First, the microcomputer (.mu.C) executes the step (# 200) in FIG.
At 0), it is determined from the input lens data whether the lens is attached or not. If it is not attached, the metering value (B _VAM ) (B _VAM ) of the metering range (LM ₄ ) (instead of this, The film speed (Sv) and the exposure correction value (△ Ev) are added to the averaged photometric value), the shutter speed is calculated, and the process returns (# 2005). If a lens is mounted, an exposure calculation corresponding to each exposure mode is performed (# 2010 to # 2040).

Therefore, the exposure calculation in the P mode is performed by using FIGS. 23 (a) to 23 (c).
First, in step (# 2100) of FIG. 23 (a), the microcomputer (μC) determines the backlight state by _comparing the photometric value (B _VAM ) in the photometric range (LM ₄ ) with the photometric value (B _VAM ).
A determination is made based on whether or not the difference from the spot photometric value (Bvsp) obtained in step 2 is equal to or greater than 2 Ev (# 2100). If it is 2 Ev or more, it is determined in step (# 2105) whether or not the electronic flash device is ready to emit light (the main capacitor is completely charged). If the electronic flash device is ready to emit light, the terminal (FLOK) is set to “H”. Level (# 2110) to enable flash photography, and set the control exposure value (Ev) from the photometric value (B _VAM ) in the photometric range (LM ₄ ) to Ev = B
_{It is obtained by VAM} + Avo + Sv-1 + △ Ev (# 2115). here,
The reason why 1 is subtracted is to make the background over 1 EV to make it look backlit. It is to be noted that the main subject is about to be properly exposed by the flash from the electronic flash device. Then, the process proceeds to a subroutine (# 2120) of the program I for determining the aperture value (Av) and the shutter speed (Tv), and returns. This is shown in FIG. 23 (b), and the shutter speed control value (Tvc) is set to Tv = 7 (SS = 1/125) for tuning, and the aperture value (Av) is changed from the exposure value (Ev) to 7 ( Shutter speed) is subtracted, and it is determined whether or not the aperture value (Av) is greater than 7 (F = 11).
And return (# 2215). Aperture value (Av) is 7
If the aperture value is less than or equal to the open aperture value (Av)
o) It is determined whether or not it is smaller. If it is smaller, the open aperture value (Avo) is set as the control aperture value (Avo).
The calculation value (Av) is returned as the control aperture value (Avc) (# 2220 to # 2230).

Returning to FIG. 23 (a), in step (# 2105)
If the electronic flash device (FL) is not ready to emit light,
The terminal (FLOK) is set to the “L” level (# 2125), and the control exposure value (Ev) is obtained from the spot value (Bvsp) of the photometry range as Ev = Bvsp + Avo + Sv + △ Ev so that the main subject is properly exposed (# 2130), aperture value (Av), shutter speed (Tv)
Goes to the subroutine (# 2135) of the program II for determining

FIG. 23 (c) illustrates this. First, in step (# 2250), the aperture value (Av) is obtained from Av = 5 / 8Ev−25 / 8, and this aperture value (Av) is the maximum aperture value of the lens. (Avmax)
It is determined whether or not it is greater than (# 2255). If it is greater, the control aperture value (Avc) is set as the maximum aperture value (Avmax) (# 22).
60), and proceed to step (# 2280). Step (# 2255)
In, when the aperture value (Av) is equal to or less than the maximum aperture value (Avmax), it is determined whether the aperture value (Av) is smaller than the open aperture value (Avo), and if it is smaller, the control aperture value (Avc) is opened. The aperture value (Avo), if not smaller, the calculated aperture value (Av) is set as the control aperture value (Avc), and the process proceeds to step (# 2280) (# 2265 to # 2275).

In step (# 2280), the shutter speed (Tv) is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). The control shutter speed (Tvc) is limited to (Tvmax) (# 2290) if it is higher, and the calculated shutter speed (T
Set v) as the control shutter speed (# 2295) and return.

Returning to FIG. 23 (a), in step (# 2100),
When the difference of B _VAM −Bvsp is less than 2, it is determined that the light is not in a backlight state, and the process proceeds to step (# 2145), and the light metering range (LM ₁ ) to (LM ₄ )
From the average photometric value (Bv ₁ + Bv ₂ + Bv ₃ + Bv ₄ ) / 4 to the exposure value (E
v) is determined, and it is detected whether or not the flash device is ready to emit light (# 2150).

If the flash preparation has been completed, the process proceeds to step (# 2155) to determine whether or not the flash photography auto mode automatically determines whether or not the flash photography has been performed. To determine the aperture value (Av) and shutter speed (Tv) (# 2160),
It is determined whether or not v) is less than the speed of the camera shake warning (Tv = 6, 1/60) (# 2165). When the speed is lower than the camera shake warning speed, the process proceeds to step (# 2170) to perform flash photography as a low speed, and also proceeds to step (# 2170) in step (# 2155) assuming that forced emission is performed even when the mode is not the auto mode. . Then, the aperture value (Av) and the shutter speed (Tv) at the time of flash photography are determined by the program I, and the terminal (FL0k) is set to the "H" level (# 2175) to enable flash photography.

However, in step (# 2150), when the light emission preparation is not completed, the process proceeds to step (# 2180) as shooting with the steady light and the aperture value (A
v), the shutter speed (Tv) is determined, the terminal (FL0k) is set to the "L" level (# 2185), and the routine returns. Also in step (# 2165), when the shutter speed (Tv) is 6 or more, the process similarly proceeds to step (# 2185) and returns.

Next, a flowchart for determining the aperture value (Av) and shutter speed (Tv) in the A mode will be described with reference to FIG. 24. First, it is determined whether or not the electronic flash device is ready for light emission. If the light emission preparation is completed, the control shutter speed (Tvc) is set to 7 (1/125), the terminal (FL0k) is set to the "H" level, and the control aperture value (Avc) is set as the set aperture value (Av). (# 2300 to # 2310 and # 2345). If the flash preparation is not completed, the exposure value (Ev) is calculated from the average photometric value.
The shutter speed (Tv) is obtained by subtracting the set aperture value from the exposure value (Ev) (# 2315, # 2320).
Then, in the next step (# 2325), it is determined whether or not the shutter speed (Tv) is higher than the controllable maximum shutter speed (Tvmax). If it is higher, the maximum shutter speed (Tvmax) is controlled. (Tvc), if not, the calculated shutter speed (Tv) is set as the control shutter speed (Tvc), and the respective steps (# 234)
Go to 0) (# 2325 to # 2335). In step (# 2340), the terminal (FL0K) is set to the "L" level, and the next step (# 2340)
In 2345), the set aperture value (Av) is set to the control aperture value (Avc).

Next, the control in the S mode will be described with reference to FIG. 25. First, in step (# 2400), the exposure value (Ev) is obtained from the average photometric value and the like, and it is determined whether the light emission preparation is completed in step (# 2400). If it is determined in 2405) that the light emission preparation is completed, the terminal (FL0k) is set to the “H” level (# 2410).

Next, in step (# 2415), it is determined whether or not the shutter speed (Tv) is 7 or less, and if it is 7 or less, the set shutter speed (Tv) is set as the control shutter speed (Tvc) (# 2420). If it exceeds 7, the tuning speed 7 is set as the control shutter speed (Tvc), and each step (# 2430)
Proceed to.

In step (# 2430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the obtained exposure value (Ev). Whether this aperture value (Av) is smaller than the open aperture value (Avo) is determined. Is determined (# 2435), and if smaller, the control aperture value (Avc) is set as the open aperture value (Avo) (# 2440) and the process returns. On the other hand, if the aperture value (Av) is not smaller than the open aperture value (Avo), it is determined whether or not the aperture value is larger than the maximum aperture value (Avmax) (# 2445). Is set as the control aperture value (Avc) (# 2450). If not, the calculated aperture value (Av) is set as the control aperture value (Avc) (# 2455), and the process returns.

In step (# 2405), when the light emission preparation is not completed, the set shutter speed (Tv) is set to the control shutter speed (Tvc) (# 2460), and the terminal (FL0k) is set to the "L" level (# 2465). ), And proceeds to step (# 2430) to execute the subsequent flow.

Next, when the mode is the M mode (see FIG. 26), it is determined in step (# 2500) whether or not the light emission preparation is completed. The terminal (FL0k) to “H” level,
The process proceeds to step (# 2515), and returns the preset aperture value (Av) to the control aperture value (Avc), and returns the shutter speed (Tv) to the control shutter speed (Tvc) in the next step (# 2520). I do.

Referring back to FIG. 6, when the exposure calculation (# 460) is completed, the microcomputer (μC) of the camera performs the third data communication with the IC card (CD) (# 465). FIG. 5 (c) shows a flowchart of this control.
Is set to the "H" level to perform serial communication with the IC card (CD) (# 360), and inform the IC card that the IC card is on the output side (# 360). Here, wait for time (# 36
5) Perform serial communication and input data from the IC card (CD) (# 370). When this data communication is completed, the terminal (C
SCD) to the “L” level and returns.

In this flow, the data sent from the IC card (CD) differs between when the IC card is a mode setting card and when it is a program card. and setting data (CKb ₈ ~CKb ₂₂ of table 7), there is display control data for determining whether or not to display (CKb _7), whereas in the case of program cards, control shutter speed (C · Tv
c), aperture value for control (C / Avc), with flash /
There are data of none, flash dimming light emission to full emission (Full emission) / not, and control / non-control by card.

After completing this card data communication (III) in FIG.
The microcomputer (μC) executes the flow of the card control in step (# 468). This flow shows the determination of whether or not to control the camera with an IC card (in this case, a program card) based on the input data, and the operation of the camera when performing the control. 27, the microcomputer (μC) first determines in step (# 2602) whether or not the card function is selected, and when the card function is selected (when CDFNF = 1, step (# 2605) On the other hand, when the card function is not selected (CDFNF = 0), step (# 267)
At (7), the function bits (Fb ₉ ) and (Fb ₁₀ ) are set to 0, and at (# 2680), the dimming level change amount (F △ Ev) is reset, and the routine returns. When the card function is selected, it is next determined whether or not a program card is mounted. If the program card is mounted (CKb ₁
~CKb ₆ = 01 _H) is determined by data inputted whether the camera control of the IC card in step (# 2610) from the IC card (CD). And the step (# 2605)
In If not a program card is not a camera control of the IC card _{(Ckb 1 ~Ckb 6 ≠ 01 H} ) or when the step (# 2610) (Ckb ₂₃ = 0) after step (# 2677) to step (# 2680) move on.

If it is determined that the camera is controlled by the IC card (Ckb ₂₃ = 1), the control aperture value (Avc), the control shutter speed (Tvc), the presence / absence of full emission, and the presence / absence of flash emission
Unequal or the like is determined based on data input from the IC card (# 2615 to # 2645). Next, it is determined whether or not the mode is the flash light emission mode based on the input data (# 2650).
2685), and proceed to step (# 2680). When the flash mode is set, the terminal (FL0k) is set to “H” level (# 265
5), It is detected whether or not the mode is the full light emission mode (# 2660).
When the mode is the full light emission mode, step (# 266
5) Set the terminal (Full) to "H" level and return.
When not in the ulL light emission mode, the terminal (Full) is set to the “L” level (# 2670), and the dimming level value change amount (C · F ΔEv)
Set (# 2675) and return.

In FIG. 6, when the above-described routine for determining and controlling camera control by the IC card (# 468) is completed,
The process proceeds to display control (# 470), which will be described with reference to FIG.

First, the microcomputer (μC) determines in step (# 2700) whether or not the flag (CDFNF) indicating whether or not the card function is working is set. If the flag (CDFNF) is set, the next step ( In step (# 2710), it is determined whether or not the flag (CD1F) indicating that the vehicle has passed once through (# 2710) to (# 2720) is set. Where the flag (CD1
If F) is not set, set it in step (# 2715) to display the function added by the card for a certain period of time when the card function changes from not working to working. Flag (DISPIF)
Is set in step (# 2720), and step (# 272
Proceed to 5). When the card function is not working (CDFNF =
In step (0), a flag indicating that the step (# 2710) to (# 2720) has been passed once is reset in step (# 2705), and the flag (CD1F) is set to step (# 2725). If no, the process proceeds from step (# 2710) to step (# 2725) without doing anything.

In step (# 2725), it is determined whether or not the flag (DISPIF) is set. If the flag is set, it is determined in step (# 2727) whether or not the card type is a program card. If the card is a card, the PR display data
In step (# 2728), data indicating "O" and "CARD" indicating that the card is working is created. The display in this case is as shown in FIG. 34 (b).

If it is not a program card, that is, if a mode setting card or a card is not loaded, step (# 272)
The function of the card is set to the camera 9) E ² PRO
The display data is read from M, and display data as shown in FIG. Note that the display data and the display contents change according to the set contents.

If the flag (DISPIF) is not set in step (# 2725), it is determined in the next step (# 2730) whether or not display control using a card is to be performed, and display control using an IC card (CD) is to be performed ( For Ckb ₇ = 1), display data corresponding to the mode setting data input from the IC card is created (# 2735).

If there is no card display control signal from the IC card (Ckb ₇ = 0) in step (# 2730), the process proceeds to step (# 2736) to determine whether or not the write flag (WRTF) to the E ² PROM is set. judge. When the write flag (WRTF) is set, that is, when the data setting mode using the card is completed, a mode setting subroutine (# 2737)
And display data (II) is created and the step (#
2745). The mode setting subroutine is described with reference to FIG. 30.Here, it is determined whether the mode currently set in the camera is the newly set mode. I try to move to another mode. For example, if the exposure A mode is currently selected, but the IC card removes the A mode from the exposure mode selection, the A mode display and control as before may not be performed. Has been prevented.

Now, in the flow of FIG. 30, the microcomputer (μC)
First sets the flag (CHGF) which is reset when there is a change possible mode (# 3200), E ² PROM data or settable exposure mode has been changed (MSb ₆ ~MSb ₈₎
The data (CKb _{12 to} CKb ₁₈ ) input from the IC card (CD) is compared and judged (# 3203). If the data is different (that is, if there is a change), the exposure mode is forcibly set to P mode. Data (Fb ₀ , Fb ₁ ) is changed to (0,0) (# 320
5), and proceed to step (# 3210).

Next, in step (# 3210), it is determined whether or not there is an H / S mode. If there is an H / S mode (CKb ₈ = 1), the flag (CHG
F) is reset, and the change data (CDb _{0 to} CDb ₂ ) is changed to H / S change (0,0,0) and the process proceeds to step (# 3230) (# 3220, # 32
3225).

If there is no H / S mode (CKb ₈ = 0), the data (Fb ₆ , Fb
b ₇ ) is determined as (0,0) without H / S (# 3215), and the flow advances to step (# 3230).

In step (# 3230), ₊ / _- determines whether the mode is present if there (CKb ₉ = 1), whether or not the flag (CHGF) is set determined in step (# 3245), If it is set, the flag is reset (# 325
0) and the change data (CDb _{0 to} CDb) in the step (# 3255)
₁₎ The ₊ / _- as a change (001) proceeds to step (# 3260).

If the flag (CHGF) is not set in step (# 3245), the process directly skips steps (# 3250) and (# 3255) and directly proceeds to step (# 3260).

In step (# 3230), ₊ / _- If the mode is not (CKb ₉ = 0), as no correction, feature data (Fb _4, F
b ₅₎ was used as a (0,0), as the correction exposure amount △ Ev = 0 the process proceeds to step (# 3260) (# 3235, # 3240).

In step (# 3260), it is determined whether or not the S / C mode exists. If there is (CKb ₁₀ = 1), it is determined in step (# 3270) whether the flag (CHGF) is set. , When set, reset this (#
3275), and as the S / C change, the change data (CDb _{0 to} CDb ₂ ) is set to (0,1,0) in step (# 3280), and the process proceeds to the next step (# 3285).

When the flag (CHGF) is not set, the process skips steps (# 3275) and (# 3280) and directly proceeds to step (# 3285). In step (# 3260), if there is no S / C mode (CKb ₁₀ = 0), the function data (Fb ₃ ) is set to (0) in step (# 3265) in order to set the single shooting mode.
And proceed to step (# 3285). Step (# 328
In 5), it is determined whether or not the S / A mode exists. If there is (CKb ₁₁ = 1), the flag (CHG) is set in step (# 3295).
F) is set or not, and if so, the flag (CHGF) is reset (# 3300),
Further, in the next step (# 3305), the change data (CDb _{0 to} CDb ₂ ) is set as (0,1,1) as S / A change, and the process returns. If the flag (CHGF) is not set in the previous step (# 3295), there is no changeable mode (# 3310),
To return change data (CDb ₀ ~CDb ₂₎ as (1, 0, 0).

If there is no S / A mode in step (# 3285) (C
(Kb ₁₁ = 0), and in step (# 3290), the function data (Fb ₂ ) is set to (0) to return to the multipoint ranging mode (A mode), and the process returns.

In FIG. 28, the above-described mode setting (# 2737) is performed, and subsequently, data creation II (# 2742) is performed. The data creation II is for creating display data for performing a normal display (for example, FIG. 2 (u)) not depending on the card. When the card function is not working, the CARD as shown in FIG. 29 is used.
Character is deleted. Each step (# 2728),
In all cases of (# 2779), (# 2735) and (# 2742), after the data has been created, the process proceeds to step (# 2745), and the terminal (CS) is used to perform data communication with the display control circuit.
DISP) to “H” level, and then step (# 2750)
To perform serial communication (camera output side), and after completion of communication, set the terminal (CSDISP) to "L" level (# 2755).

Next, when the card function is activated, it is determined in step (# 2760) whether or not a flag (DISPIF) indicating display for a certain period of time is set.
Wait for a second (# 2765). This time, the above step (# 272
8), the data created in (# 2729) is displayed.

Next, in step (# 2770), the flag (DISPIF) is reset, and the flow advances to step (# 2775). The step (#
If the flag (DISPIF) is not set in (2760), the process skips steps (# 2765) and (# 2770) and proceeds to step (# 2775). In step (# 2775) IC
Data to release the display control by the card once (CKb ₇ )
To 0.

Next, the control shutter speed (Tvc) is less than 6 (1/60)
Is determined in step (# 2780), and if it is less than 6, it is determined whether or not the buzzer warning mode is selected (# 2785). When selected (MSb _{9 to} MSb
_{12 = 0 H, 2 H,} 4 H, 6 H, 8 H, A H, C H, E H,) outputs a pulse of a predetermined time a predetermined frequency from the terminal (OBZ) to perform a warning by buzzer (# 2790), and proceed to step (# 2792).

When the control shutter speed (Tvc) is 6 or more, or when the buzzer warning is not performed (MSb _{9 to} MSb ₁₂ = _1H ,
3 _H, proceed to _{5 H, 7 H, 9 H} , B H, D H, F H,) step without buzzer alerts the (# 2792).

In step (# 2792), determines a flag (WRTF) indicating whether writing function of the camera shown data of the input mode is set to the E ² PROM MSb ₀ ~MSb ₁₂ of, if it is set, it Is written to the E ² PROM (# 2794). And
In the next step (# 2796), this flag (WRTF) is reset and the routine returns. If the flag (WRTF) is not set in step (# 2792), the routine immediately returns.

After completing the display control (# 470) described above with reference to FIG. 6, the microcomputer (μC) in step (# 471) sets a flag (SETF) indicating that the IC card is inserted and the data setting mode is set. It is determined whether or not is set, and if it is set, step (# 520) is performed.
Skip to and return to all interrupts enabled state.
If the flag is not set, step (# 47)
Skip to 5) to determine whether the release switch (S ₂ ) is ON or not. If it is not ON (IP ₇ =
(H)). When ON (IP ₇ =
"L"), it is determined whether or not the one-shot AF is set (# 48).
0). Here, in the case of the one-shot AF, it is determined in step (# 485) whether or not the flag (AFEF) indicating the focus is set. And return.

When the flag (AFEF) is set, or when continuous AF is used instead of one-shot AF, interruption to this flow is prohibited in step (# 490), and exposure control is performed in the next step (# 495) determined after performing (described later), the step (# 500) in for 1 frame hoisting film (which will be described later), a release switch (S ₂₎ is a step whether ON (# 505), When ON (IP ₇ = "L"),
It is determined in step (# 510) whether or not the camera is in the continuous shooting mode. If the camera is in the continuous shooting mode (Fb ₃ = 1), the process proceeds to step (# 5).
In step 15), all interrupts are enabled, and the routine proceeds to [SO]. When the mode is not the continuous shooting mode (Fb ₃ = 0), the process returns to the step (# 505), and waits until the release switch (S ₂ ) is turned off.
When FF is set, all interrupts are enabled in step (# 520) and the routine returns.

Next, the exposure control subroutine of the above step (# 495) will be described with reference to FIG. First, in step (# 2800), based on the data input from the flash device (ST),
It is determined whether or not the charging is completed. If the charging is completed, the terminal (CSST) is set to the “H” level for (t ₂ ) in step (# 2805) to indicate that the exposure mode is set. Then, as the light control amount, the film sensitivity (Sv), the exposure correction amount (△ Ev), the flash light emission amount correction amount from the IC card (FFEv)
Is calculated, D / A converted as analog data to a dimming circuit (STC), and output (# 2810).

In the next step (# 2815), aperture control is performed based on the control aperture value (Avc), mirror up control is performed (# 2820), and then control of the shutter speed is performed based on the control shutter speed (Tvc). Then, the Full light emission signal terminal is set to “L” level (# 2830), and the process returns.

Here, the operation of the interface circuit at the time of flash emission will be described with reference to FIG. 9 (b). At the time of flash photography, the terminal (FL0K) is at the "H" level, and when the front curtain of the shutter has completed traveling, the X contact Turns ON and the AND circuit (AND
₂₁ ) A light emission start signal is output to the electronic flash device (ST), which inputs this signal and starts light emission. When not in FULL flash mode, the inverter (IN
₂₁ ) is output to the AND circuit via the AND circuit. When a pulse signal indicating the completion of dimming is input from the dimming circuit (STC), the AND circuit (AND ₂₂ ) outputs this signal to the OR circuit (OR). ₂₁ ) to the flash device. In the electronic flash device (ST), this is input to stop the flash light emission. Full
When the light emission mode, "L" level is input to the AND circuit (the AND _22), the AND circuit (the AND ₂₂₎ becomes inoperable, since the dimming signal for prohibiting the passage,
No signal indicating stop of flash emission is output to the electronic flash device (ST).

FIGS. 32 (a) and (b) show the steps (#) in FIG.
A flowchart for controlling the winding of one frame of the film shown in FIG. 500) is shown. To explain this, 32nd
FIG microcomputer in (a) (μC) outputs a motor winding signal to the motor control circuit (MD), thereby resetting the timer started _{(T 3) (# 2850,} # 2855). This timer is used to detect that the film has been wound up to the last frame and that the film has become stuck. The microcomputer (μC) determines in step (# 2860) whether the switch (S _WD ) indicating that one frame has been wound has been turned on, and if not turned on, determines whether 2 seconds have elapsed in this state. (# 2865), if 2 seconds have passed,
The motor is controlled to stop (# 2870), and assuming that the film is tight, the control of the film is performed (# 2875), and the routine returns. Referring to FIG. 32 (b), the tension subroutine will be described. In step (# 2920), it is determined whether or not auto return (automatically rewinds the film after tension) is selected. (MSb _{9 to} MSb ₁₂ = 0 _{H to} 3 _H , 8 _{H to} B _H , where _H
(Hexadecimal number), a signal for motor reversal is given to the motor control circuit (MD), and waits _{until the} film detection switch (S _FLM ) is turned on (# 2930, # 2935). Next is determined whether involving film when the switch (S _FLM) is turned ON to all cartridge chamber, where (E ² PROM involving MS
If b _{9 to} MSb ₁₂ = 2 _H , 3 _H , 6 _H , 7 _H , A _H , B _H , E _H , F _H ), wait for one second (# 2945) and execute motor stop control (# 2955). After going, return.

MSb ₉ ~MSb ₁₂ = 0 _H of a unless (E ² PROM case involving,
_{1 H, 4 H, 5 H} , 8 H, 9 H, C H, D H), returns performs motor stop wait 0.2 seconds (# 2950).

When not auto-return in the step _{(# 2920) (MSb 9 ~MSb} 12 = 4 H ~7 H, C H, F H) is the step (# 2925)
And wait _{until the} rewind switch (S _RW ) is turned on.
If N, the process proceeds to the step (# 2930).

Returning to FIG. 32 (a), in step (# 2860)
When the one-frame winding completion switch (S _WD ) is turned on, the motor is controlled to stop in step (# 2880), and in the next step (# 2885), whether or not the counter of the number of films is a forward calculation type And if it is a forward calculation (MSb _{9 to} MSb
₁₂ = 0 _{H ~7 H),} the step (if at # 2890) Film count of shooting already number represents a counter (N ₁₎ is incremented by 1, and a back calculation formula (MSb ₉ ~MSb ₁₂₎ Then, the count number (N ₁ ) indicating the remaining number of films is decremented by 1, and the process proceeds to step (# 2900). In step (# 2900), the number of films (N ₁ )
Is written to MSb ₁₃ to MSb ₁₈ of the E ² PROM.

Next, when the back cover close detection switch (S _RC ) or the rewind switch (S _RW ) is operated, a pulse signal is input to the terminal (INT ₂ ), and the microcomputer (μC) is shown in FIG. Execute the [INT ₂ ] interrupt. In the flow of FIG.
The microcomputer (μC) first prohibits interruption to this flow (# 3000), and then detects in step (# 3005) whether or not the rewind switch (Srw) is ON. If it is turned on, FIG. 32 (b)
The [rewind] routine shown in (1) is executed, the interrupt is permitted, and the routine returns (# 3010). Rewind switch (S _RW )
Is not ON, the back cover close switch (S _RC )
It is determined that N has been performed, and the process proceeds to step (# 3015) to determine whether a film exists. If there is no film, that is, if the film detection switch (S _FLM ) is OFF, the process proceeds to step (# 3100) without performing initial loading.
On the other hand, if a film exists (that is, S _FLM is ON
), The terminal (CSDX) is set to the “H” level, serial communication is performed with the film sensitivity reading circuit (DX), and the film sensitivity data (Sv) and the number of film shots (N) are input, and the communication is completed. to terminals (CSDX) to the "L" level (# 3020～ (# 3030). then, the number (N ₁₎ was set to -2 (# 3035), followed by terminals (CSDISP) "H" level And performs serial communication with the display control circuit (# 304).
5), other than the data indicating the number of film frames (N ₁₎ outputs data which is not displayed, completing the serial communication terminal (CSDI
SP) to the “L” level (# 3050). For the numerical value of the number of films (N ₁ ), the display is made using two 7 segments. Next, the microcomputer (μC) outputs a signal indicating winding of the motor to the winding control circuit (# 3055), waits for one frame to be wound (# 3060), and turns on the one-frame winding switch (S _WD ). One is added to the number (N ₁ ) to determine whether or not the number has become 1, and if not, the process returns to step (# 3040). If it is 1,
Proceeds to step (# 3075) to stop the motor, and further checks whether the film counter is of the forward formula.
3080), and if it is a forward calculation formula, the step (# 308
In (5), if (N ₁ ) is 1, and if it is not a forward formula, step (# 309)
The number of film shots (N) read in step (0) is set to (N ₁ ), and the flow advances to step (# 3095). And the step (#
In (3095), the above (N ₁ ) and the film sensitivity are written in a predetermined address of the E ² PROM, and after the writing is completed, all interrupts are permitted (# 3100) and the routine returns.

In the above, the microcomputer (μ
The operation C) has been described with reference to various flowcharts and the like. Next, control of an IC card mounted on the camera will be described with reference to flowcharts. The mode setting card and the program card will be described separately. The IC card (CD) incorporates a microcomputer (μC ₂ ) with a built-in E ² PROM.

First, from the mode setting card, the IC card (C
When D) is mounted on the camera, power is supplied and, as described above, the microcomputer (μC) of the camera is interrupted and a clock (φ) is sent to the microcomputer (μC ₂₎ on the IC card side. ) Is in a drivable state.

On the IC card side, a signal that changes from “L” to “H” level is input to the terminal (RE) by being attached to the camera, and the microcomputer (μC ₂ ) executes the flow shown in FIG. 35 (a). In the figure, the microcomputer (μC ₂ ) first resets the flag output port (#CD ₅ ) and resets the RAM bits (CCKb _{0 to} CCKb).
b ₂ ) is reset to (0,0,0), and the E ² PROM shown in Table 8 is reset.
The data of (CMSb _{0 to} CMSb ₁₁ ) is transferred to the bit corresponding to the data content of the RAM bits (CCKb _{3 to} CCKb ₁₄ ) shown in Table 9 (# CD10), and an interrupt is waited for (# CD15). ).

The contents of this E ² PROM data include the camera E ² PROM
Same data as the data _{(MSb 0 ~MSb 3, MSb 5} ~MSb 12) is made writable.

When a signal (CSBCK) indicating a data communication request is sent from the camera, the microcomputer (μC ₂ ) of the IC card interrupts [IN
T], and this is shown in FIG. 35 (b) and explained. The microcomputer (μC ₂ ) controls in step (# CD50) to perform serial communication with the camera, and the data transmitted from the camera is exchanged. Based on the credit clock (SCK), data from the camera is input, and the number of data communication (I, II, II)
I) is determined (# CD55). In case of data communication I, first, what kind of IC card (mode setting,
(Or a program) to set data indicating to the camera (mode setting card in this case), output data based on the clock (SCK) sent from the camera (# CD60), and wait for an interrupt ( # CD63). Data communication
If it is II, go from step (CD70) to step (# CD7
Proceed to 5) to input data (key data in this case) sent from the camera in synchronization with the clock (SCK). Based on the input data, a data set routine (# CD75) is performed, and an interrupt is waited for (# CD75).
CD63).

The data set routine is shown in FIG. 35 (c) and explained. In step (# CD100), it is determined whether or not the card data setting switch (S _CDS is turned on). Step (# CD110, # CD10
In step 5), the flow proceeds to step (# CD115) through the flow of each control [S _CDS ON] [S _CDS OFF]. The flow of this control is shown in FIGS. 35 (d) and (e).
Compared to the flow of [S _CDS ON] and [S _CDS OFF] shown in FIG. 18 and FIG. 18, there is no step for determining the mode setting card in step (# 1500) and step (# 1550). (It is unnecessary), and the others are the same.

The reason why a C is added at the head of the flag is to distinguish it from the flag on the camera side, and its function is the same as the function of the flag on the camera side without C.

Returning to FIG. 35 (c), in step (# CD115), it is determined whether or not the set flag (CSETF) is set. If not, the flow of [S _CDS ON] is once passed, It is determined in step (# CD120) whether or not the flag (CCDSF) set when the flow is not passing through the [S _CDS OFF] flow is set.

In this embodiment, the card data setting switch (S _CDS ) is
If the flag (CSETF) is not set in step (# CD115), the setting has not been changed yet, but it indicates such a change.

If the flag (CCDSF) is set, the display control flag (DISPCF) is set (# CD125). If the flag (CCDSF) is not set, the display control flag (DISCDF) is reset (# CD130) and the routine returns.

By setting and resetting the display control flag (DISPCF), it is determined whether or not the display on the camera side is to be the display in the data setting mode (step (# 2730) in FIG. 28). In step (# CD115), when the flag (CSETF) is set, the switches (S _SE ), (S _FUN ),
Flow (S _SE ON), (S _FUN ON), (S _EXP O) corresponding to one of the operations (S _EXP ), (S _AEL ), (Sup), and (Sdn)
N), (S _AEL ON), (Sup ON), and (Sdn ON) are executed, and the process proceeds to step (# CD125) (# CD135 to # CD190).

Hereinafter, a flow according to the operation of these switches will be described.

First, the change mode is selected by the change data selection switch (S _SE ) as shown in FIG. 35 (f).
Proceed to the next position of the position corresponding to the RAM bit (CCkb ₀ ~CCkb _2). At this time, the bits (CCkb _{0 to} CCkb ₂ ) are also changed at the same time and the program returns (# CD300).

As shown in FIG. 35 (g), the mode selectable by the change data valid / invalid changeover switch (S _FUN ) is set (changeable, bit = 1) If reset, mode reset (no change, bit = 0); otherwise, set and return. In terms of signal, set _{(CCkb 3 ~CCkb 6) (=} 1), reset (=
0). In step (# CD410), it goes without saying that the S / A mode is set.

Next, as shown in FIG. 35 (h), the selection of the exposure mode that can be selected by the exposure mode combination selection switch (S _EXP ) is advanced by one each time this switch (S _EXP ) is operated. changes the state of the bit (CCkb ₇ ~CCkb _9).

Operation selection of the AE lock mode by the AE lock switch (S _AEL), every time that is operated as shown in FIG. 35 (i), or the period AE lock ON the switch (S _AEL), the camera power or AE lock during the retention period (10 seconds hold) changes the bit (CCKB ₁₄₎ as alternating.

Selection of the mode shown in Table 2 by each operation of the up switch (S _UP ) and down switch (Sdn)
35 Bits (CCkb _{10 to} CCkb) as shown in FIGS.
When the up switch (Sup) is operated from the current position of kb ₁₃ ), the count is increased, and when the down switch (Sdn) is operated, the count is reduced, and the bits (CCkb _{10 to} CCkb ₁₃ ) are set accordingly. change.

In FIG. 35 (c), in step (# CD100), the card data setting switch (S _CDS ) is turned on, and the step is performed sequentially and the steps (# CD110) → (# CD115) → (# CD120) →
(# CD125) At this time, based on the card display control signal from the mode setting card (this signal is output when DISPCF is 1 on the card side), the camera performs the steps in FIG. 28 (# 2730). To (# 2735), a display that can be set by the card and that is currently displaying the function of the camera (for example, the display shown in FIG. 38 (b)) [FIG. 38 (A)].

Once the change data selection switch ( _SSE ) is pressed,
The cursor (△) comes to the position of H / S (however, there is no display of H / S because it is not currently set) (FIG. 38 (c)). In this state, if the change data valid / invalid changeover switch (S _FUN ) is pressed once, H / S is displayed as shown in FIG. 38 (d) to add the H / S function.

Next, the same operation, that is, the change data selection switch (S
_SE), when the operation changes the data valid / invalid changeover switch (S _FUN) is sequentially pressed once performed, this time ₊ / _- is displayed as shown in Figure 38 in that the removal of the feature (e).

Next, when the exposure mode combination selection switch (S _FXP ) is pressed once, the display of PAMS changes to PAM as shown in FIG. 38 (f). When the AE lock switch (S _AEL ) is pressed once, the display of PUSH SP changes to the display of Hold as shown in FIG. 38 (g).

Here, once the up switch (Sup) is pressed,
2 changes to 1 as shown in FIG. 35 (h).

Next, the card data setting switch (S _CDS) is once ON, when the OFF card display control signal is not output from the card, the camera proceeds from (# 2730) (# 2736), this time, E ² Flag indicating writing to PROM (WRTF)
Is set (that is, the switch (S _CDS ) is once changed from ON to OFF (however, before turning ON, it is the data setting mode by the card)). The display of FIG. 38 (h) is changed to the display of FIG. 38 (i).

Returning to FIG. 35 (b), in step (# CD80)
When the data communication is determined to be (III), steps (# CD85), performs serial communication (in this case card-side output), IC card function data (CCkb ₀ ~CCkb ₁₄₎
And (DISPCF) signals to the camera. And E ²
In step (# CD90), it is determined whether or not the PROM write flag (CWRTF) is set. If not, the process proceeds to step (# CD63) to wait for an interrupt. Data (CCkb _{3 to} CCk
writing b ₁₄₎ the bits corresponding to the data content of the bit of the ^{_{E 2 PROM (CMSb 0 ~CMSb 11}} ) (# CD92), resets the write flag (CWRTF) to E ² PROM (# CD95 ), The process proceeds to step (# CD63), and waits for an interrupt.

In the step (# CD80), the data communication (II
If not I), it is assumed that the signal is a sleep signal and the HALT state is set.

Next, the case of a program card will be described. In the present embodiment, the program card is an effective sports program when it is desired to take a scene of playing sports.

Now, when the IC card is attached to the camera, and the input signal to transition to the RESET terminal of the card-side microcomputer ([mu] C ₂₎ from the "L" level to the "H" level, the IC card of the microcomputer ([mu] C ₂₎ is The flow of [reset] shown in FIG. 36 (a) is executed, and the flag and the port are reset in a step (Q1) to wait for an interrupt (Q2). When the CSBCK signal is input from the camera, an interrupt occurs and [IN
T]. IC card microcomputer (μC ₂ )
Performs data communication based on the clock (SCK) sent from the camera (Q50). The data at this time is for the camera to inform the card of the type of communication, and the microcomputer (μC ₂ ) of the IC card inputs this data to determine the content of the communication (Q51). . In the case of data communication I, data indicating the type of card (here, a program card), data indicating that the AF mode is continuity, and data indicating that the number of photometry zones is multipoint are serially transmitted to the camera. Output at (Q52), go to step (Q56) and wait for interrupt.

Here, this program card is intended for sports scenes, so continuous AF, which is always in focus to respond to fast-moving subjects, also has a wide range of light metering zones for the same reason Since the focusing zone focuses on a moving subject, it is desirable to have a wide range of points. However, it is possible to switch the focusing zone in consideration of a case where the photographer wants to focus only on the main subject sharply.

Next, before describing a specific example of a flowchart of the exposure calculation, an outline of control of the card will be described.

<< Cards for outdoor sports and athletic meet >> [Contents] You can shoot a moving subject with a high-speed shutter that does not shake in a relatively bright place.

〔control〕

The control contents of the outdoor stage and athletic meet card 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 by the following equation.

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 the aperture slightly to speed up the operation. Therefore, Av = (3/4) E
Calculate v−23 / 4.

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

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

 Next, a shutter speed (Tv) is obtained by the following equation.

When Av ≧ Avo, Tv = Ev−Av When Av <Avo, Tv = Ev−Avo (b) If the film is a negative film, correct the shutter speed (Tv) to increase the shutter speed (Tv) I do.

Negative film has a wide latitude, so use it to lower the exposure by about 1 Ev to maintain a high shutter speed.

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

(C) Others The above control is performed when a lens with a focal length of 70 mm or more is mounted. The reason is that sports photography seems to have a relatively long distance to the subject, and it is considered that the subject cannot be sufficiently photographed without a telephoto lens, and when the telephoto lens is not used, the image magnification of the subject becomes small. The control is not performed because the probability of causing a camera shake by moving the lens to follow the subject is small.

In this control, the flash is forcibly turned off, and the automatic flash emission is not performed. The reason is that this program card is intended for shooting in relatively bright places,
This is because, since it is considered that the distance to the subject is relatively large, activating the flash does not seem to have much effect.

In this control, if the flash switch is forcibly turned on, no control is performed. The reason is that, in this control, the flash is not emitted for the above-described reason, and therefore, if the control is performed at the time of the forced ON, it is against the photographer's will to make the flash emit.

Next, a flowchart of the exposure calculation of the program card will be described with reference to FIG. 36 (c). In the figure,
First, the microcomputer of the program card determines the presence or absence of a lens from the data input in the step. If the lens is not attached to the camera body, lens data such as the aperture value (Avo) does not come to the IC card. Accordingly, since the exposure calculation cannot be performed, the process proceeds to step and the exposure control is left to the camera body. If a lens is mounted, the process proceeds to step S1 to check the focal length of the lens from the input data. 70 focal length
Since control of the card is not performed for a lens having a diameter of less than mm for the above-described reason, in this case also, the procedure jumps to the step and the exposure control is left to the camera body. If the focal length is 70 mm or more, the state of the flash forced light switch is checked from the data input in the step. If the forced light emission switch of the flash is ON, the card jumps to the step because the card does not control for the above-mentioned reason.

On the other hand, when the switch is OFF, the exposure value (Ev) is calculated based on the sum of the spot luminance (Bvs) and the film sensitivity (Sv) of the data input in the next step. Then, the content of the control is changed according to the value of the exposure value (Ev).
For the above reason, when Ev <21, Av = (3/4) · Ev−2
(Av) is obtained in steps from the formula of 3/4. When Ev ≧ 21, (Av) is obtained in steps from the equation Av = (1/2) · Ev−1 / 2.

The comparison between (Av) calculated in the step and the minimum aperture value (Avmax) of the lens is performed in the next step. And A
When v ≧ Avmax, the lens cannot be further stopped down.
ax.

On the other hand, when Av <Avmax, Avc = Av in the step. After the body control aperture value Avc is obtained in this manner, the shutter speed (Tv) is set to Tv = Ev−Avc in steps.
Calculate based on the formula.

In the next step, this shutter speed (Tv)
And the maximum shutter speed (Tvmax) of the camera. Here, when Tv ≧ Tvmax, proceed to the step,
Let the shutter speed for body control (Tvc) be (Tvmax). When Tv <Tvmax, Tvc = Tv in step.

If Ev <21 in the above step, (Av) is calculated by the formula shown in the step, and then the process proceeds to the step. In the step, (Av) calculated in the step is compared with the open aperture Avo. Here, when Av> Avo, (Av) and (Avma
Go to the above step to compare with x). Av ≦ Avo
In the case of, the aperture value of the lens can not be further opened,
Proceed to step and set the body control aperture (Avc) to (Av
o). Then, in a further step, the shutter speed (Tv) is calculated from the equation Tv = Ev-Avc.

For the reasons described above, when the film is a negative film, the shutter speed (Tv) must be corrected, so that the type of the film is determined in the step. As a result, in the case of a reversal (positive) film, the process proceeds to the step to prevent the shutter speed (Tv) from becoming extremely slow.

On the other hand, in the case of a negative film, the process proceeds to step and it is determined whether or not the shutter speed (Tv) is smaller than 9. When Tv ≧ 9, the body control shutter speed (Tvc) is set to (Tv) in step. If Tv <9, the process proceeds to step and it is further determined whether or not the shutter speed (Tv) is 8 or more.

Here, when Tv ≧ 8, Tvc = 9 (step), and when Tv <8, the correction Tv = Tv + 1 is performed in the step, and the process proceeds to the next step. In the step, to prevent the shutter speed (Tv) from becoming extremely slow (T
A comparison is made to limit the maximum value of v) to Tv = -5 (30 seconds).

Here, when Tv <5, Tvc = −5 (step), and when Tv ≧ 5, Tvc = Tv (step).

Since the flash control is not performed for the above-described reason, a bit for turning off the flash is set in the step.
After that, the process proceeds to step, and the camera control uses the value calculated by the program card and returns.

Upon completion of the exposure calculation flow, the flow returns to the flow of FIG. 36 (b) and waits for an interruption.

Here, there is an interruption from the camera side. At this time, if the data communication is III, the calculated aperture value (CAvc), shutter speed (CTvc) data and whether or not to perform camera control with a card, full emission non-forced (Fb ₉ = 0), data for resetting the flash emission correction amount (CF △ Ev), prohibiting forced flash (Fb ₁₀ = 0), perform serial communication, and output to the camera side. For communications other than the above, the microcomputer (μC ₂ ) of the card stops.

Here, the switches, their functions, various data, and the like appearing in the description of the present embodiment are shown in Tables 1 to 10 below.

In the above, the entire control system of the camera function using the IC card has been described. In this embodiment, a specific exposure program in the claims is shown in FIG. 36 (c), and the other exposure programs are shown in FIG. Figures (a) and (b)
It is shown in (c). The flash setting means comprises a flash switch (FSW) shown in FIG. 9 (a). When the flash photography is set by the switch (FSW) in a state where the exposure program of FIG. 36 (c) is set by mounting the sports card, the process proceeds to the step as a result of the determination of the step of FIG. 36 (c).
The camera body is in charge of the control, and the camera body
23 Execute the exposure programs shown in FIGS.

According to the present invention, when flash photography is set in a state where a specific program (special exposure program such as for sports) is set to be used, a transition from this specific exposure program to another exposure program is made. With this configuration, it is possible to omit the execution of a specific exposure program that has almost no effect under flash photography, and it is possible to avoid waste in control operations.

If a specific exposure program can be set by attaching an accessory such as an IC card to the camera body, the operation is easy and the exposure program can be built into the accessory. Not only can the burden on the camera body be reduced, but also the type of a specific exposure program can be increased by increasing the number of accessories.

[Brief description of the drawings]

FIGS. 1 and 2 relate to an embodiment of the present invention. FIG. 1 is a circuit block diagram of the entire camera, FIG. 2 is a diagram showing a display form on a display unit thereof, and FIG. 9 is a flowchart illustrating a reset routine. FIG. 4 is a flowchart showing a routine of the initial setting in FIG. FIG. 5 is a flowchart of data communication performed between the camera and an IC card mounted on the camera. FIG. 6 is a flowchart showing a routine for performing photometry, AF, display, exposure control, etc. FIG. 7 is a flowchart showing a routine for inputting lens data therein, and FIG.
The figure is a flow chart of flash data input. FIG. 9A is a circuit diagram of the electronic flash device, and FIG.
FIG. 2B is a circuit diagram of the interface. Tenth
10A is a flowchart of the AF routine, FIG. 10B is a flowchart of the defocus amount determination therein, and FIG. 11 is a diagram showing a distance measurement range and a photometry range in the photographing screen. FIG. 12 is a flowchart showing a key setting routine provided in the camera.
FIG. 14 (a), FIG. 14 (b), FIG. 15, FIG. 16, FIG.
FIG. 18 is a flowchart showing a specific setting routine for the various keys. FIG. 19 is a flowchart showing a routine for creating photometric data, and FIG. 20 is a flowchart for AE lock. FIGS. 21 (a) and 21 (b) are flowcharts for setting the aperture and shutter speed.
FIG. 22 is a flowchart of the exposure calculation, and FIGS. 23 (a), 23 (b), 23 (c), 24, 25 and 26 show the respective modes. It is a flowchart. FIG. 27 is a flowchart of control by an IC card (particularly a program card). FIG. 28 is a flowchart showing a display routine, and FIG. 29 is a diagram showing an example of display in one of the steps. FIG. 30 is a flowchart for mode setting, FIG. 31 is a flowchart for exposure control, FIGS. 32 (a) and 32 (b) are flowcharts for winding one frame of film, and FIG. 33 is an interrupt for closing the back cover. 6 is a flowchart showing a routine of FIG. No.
FIG. 34 is a diagram showing a display example and the like when a card is mounted. FIG. 35 is a flowchart showing various routines for the IC card, FIG. 36 is a flowchart particularly for a program card, and FIG. 37 is a program diagram relating to the program card. FIG. 38 is a diagram showing a display example regarding the flowchart in FIG. (ΜC): microcomputer of camera body, (μC ₂ ): microcomputer of IC card, (CD): IC card, (ST): electronic flash device, (LM): photometric circuit, (FSW): ... flash switch.

Continuation of the front page (72) Inventor Naohiro Kageyama 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Prefecture Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Hiroshi Otsuka 2-chome Azuchicho, Chuo-ku, Osaka-shi, Osaka No.3-13 Osaka Kokusai Building Minolta Camera Co., Ltd. (56) References Japanese Utility Model Sho-63-38131 (JP, U)

Claims (5)

(57) [Claims] A plurality of exposure programs; setting means for setting an exposure program to be used from among the plurality of exposure programs; flash setting means for setting flash photography; Determination means for determining whether or not the setting has been made; and when a specific exposure program of the exposure program has been set, when the determination means has determined that flash photography has been performed, a transition is made from the specific exposure program to another exposure program. And a means for executing the another exposure program transferred. 2. The camera system according to claim 1, wherein said specific exposure program is an exposure program prepared for photographing a moving subject. 3. The camera system according to claim 1, further comprising external setting means for setting the specific exposure program from outside the camera body. 4. The camera system according to claim 3, wherein said external setting means is an accessory. 5. The camera system according to claim 4, wherein said accessory is an IC card.