JP2805876B2 - Camera system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera body and an electronic flash device detachable from the camera body.

2. Description of the Related Art In an electronic flash device, it is necessary to raise the voltage in advance to the power required for light emission in order to emit flash light, but conventionally, when the main switch of the electronic flash device is turned on to secure such power, it is automatically turned on. In this state, when the pressure rise is started and the light emission is ready, and when the light emission start signal is given from the camera body in this state, the light emission is started.

However, in this case, if the main switch of the electronic flash device is OFF, the booster circuit cannot be operated, so that the light emission preparation state cannot be maintained. On the other hand, if the main switch is ON, the booster circuit always operates to be in the light emission preparation state, but there is a case where flash light emission is not necessarily required, and in such a case, power consumption is wasted.

The present invention has been made in view of such a point,
It is an object of the present invention to provide a new camera system in which a light emission preparation state of an electronic flash device is controlled by a camera body.

Means for Solving the Problems In order to achieve the above object, the present invention provides a camera system comprising a camera body and an electronic flash device detachable from the camera body, wherein the camera body is turned on or off. A power switch for turning off, and forcibly turning on or forcing the electronic flash device mounted on the camera body in a state where the power is turned on by the power switch.
Output means for outputting a signal for turning off, and camera-side information transmission means for exchanging information with the electronic flash device, wherein the power switch on the camera body side of the electronic flash device is turned on. An electronic flash device-side information transmitting device for transmitting information to and from the information transmitting device; an input device for inputting an output signal from the output device; and forcibly turning on and forcing the electronic flash device based on the input signal. Means for determining OFF, a booster circuit for boosting the output from a battery mounted in the electronic flash device, and booster control means for performing booster control of the booster circuit based on an output signal of the determiner. Features.

According to the camera system of the present invention, the electronic flash device does not operate the booster circuit by itself when the main switch is turned ON. Forcibly turn off the power of the electronic flash device in the camera body
A signal to turn ON or OFF is output from the output means. Then, the signal is transmitted to the electronic flash device and input to the electronic flash device through the input means. The electronic flash device determines the input signal by the determination unit.If the signal indicates forced ON, the light emission control unit activates the booster circuit.If the signal indicates forced OFF, the electronic flash device does not operate the booster circuit. Make However, this control is not performed when the main switch of the electronic flash device is OFF.

Embodiment FIG. 1 is a circuit block diagram of a camera according to this 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). (LD ₁ ) is an auxiliary light emitting element that emits light toward the subject when the luminance is low and the focus cannot be detected, and the focus can be detected.

(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 performs predetermined display on the display unit (DISP _I ) on the top of the camera body and the display unit (DISP _II ) in the viewfinder. is there.

In this embodiment, the IC card (CD) has a custom card that can be changed and selected according to a person who uses the camera mode, and controls various functions of the camera according to shooting conditions (AE program, AE mode, AF mode, etc.). Is automatically determined 4
There are four types of ten cards: four program cards, four function cards for adding special functions, and memory cards for storing shooting data. These cards will be described in detail later. (ST) is an electronic flash device,
(IF) is a camera microcomputer (μC) and an electronic flash device (S
An interface provided between the camera and T). The (STC) receives the reflected light from the subject when the flash light has passed through the shooting lens (not shown) and stops the flash light emission when the proper exposure is reached. Circuit. (LE) is a lens circuit provided in the lens and outputs information specific to the interchangeable lens to the microcomputer (μC) of the camera. (LECN) is a lens drive control circuit that drives the taking lens based on focus detection information, (EN
C) is a converter that detects the rotation of the motor that drives the lens, and outputs a pulse to a microcomputer (μC) at each predetermined rotation angle. The microcomputer (μC) counts this pulse, detects the amount of extension of the current position from position ∞,
The distance is detected from the amount of feeding (number of feeding pulses (CT)). (TV _CT ) is a shutter control circuit that controls the shutter based on a control signal from the microcomputer (μC).
V _CT ) is an aperture control circuit that controls the aperture based on a control signal from a microcomputer (μC), and (MD) is a motor control that controls film winding and rewinding based on a control signal from the microcomputer (μC). Circuit. (BZ) is a buzzer that warns when the shutter speed reaches the speed at which camera shake occurs. (E) is a battery serving as a power supply, DC / DC is a DC / DC converter for stabilizing the voltage (V _DD ) supplied to the microcomputer, and (D ₁ ) to (D ₄ ) are DC / DC converters turned off. Sometimes, a voltage lower than the voltage (V _DD ) is given to the microcomputer to reduce the power consumption. The camera microcomputer (μC) hardware can operate at this low voltage, so an interrupt is required. Card (CD) microcomputer (μ
C ₂ ) Driving is not possible at this low voltage. (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 battery mounting 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 “L” level to “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 push-type 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 _FUN ) is a normally open push-type function change switch. 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 ) means that when a normal card is installed,
It is a normally open push-type card switch used for switching invalidity or changing data settings on a card other than the program card (details will be described later). (S
_CDS ) is a card data setting switch that is operated when shifting to data setting when a card is installed.
(S ₁ ) is a switch for performing a preparatory operation necessary for photographing such as photometry and AF operation, which is turned on by a first stroke of a release button (not shown). The above switches (S _EM ), (S _FUN ), (S _CD ),
Any _{one of} (S _CDS ) and (S ₁ ) is operated, and when turned on, an interrupt of [INT ₁ ] described later is executed. (S _M ) is a main switch for enabling the operation of the camera. When this switch is turned on or off, an interrupt of [INT ₂ ] described later is executed.

(S _MUP ) is a switch that turns on when the mirror up is completed, charges the shutter mechanism, and turns off when the mirror down.

(S ₂ ) is a release switch that is operated when performing a shooting operation, and is turned on when a second stroke (deeper than the first stroke) of the release button is pressed. (S _WD ) is one of the films
This is a one-frame switch that is turned ON when the frame is wound. (S _AEL )
It is a switch for performing AE lock (exposure lock) and is composed of a normally open push switch. (S _{AF / M} ) is A
This is a state switch for switching the focus adjustment mode for switching the state between F and manual focus adjustment.

(S _SE ) is a normally open change data selection switch for selecting data to be changed. (S _SELF ) is a normally open push switch that sets the self mode when performing self-shooting.When this mode is set and the release switch (S ₂ ) is turned on, self-shooting starts (S _AV ) is an aperture change switch for changing the aperture value by operating this switch and operating an up switch or a down switch when the exposure mode is the M mode (manual mode). When the switch (S _AV ) is not operated in the M mode, the shutter speed is changed by operating the up switch or the down switch. (S _FLM ) is a film detection switch that detects whether or not a film is loaded, is disposed on a film rail surface near the spool chamber, and is turned off when a film is present. (S _RC ) is a back cover closing detection switch that turns on when the back cover is closed and turns off when the back cover is opened. When this switch is turned on, 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. (S _CR ) is the IC card (C
This is an IC card mounting switch that turns off when D) is mounted, and resets the microcomputer (μC ₂ ) of the IC card (CD) when it turns 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) is a normally open up switch for switching or adding data to be changed, and (Sdn) is a normally open down switch for performing subtraction. When changing the aperture value in the M mode, turn on the aperture change switch (S _AV ) and (S
up), (Sdn) to increase / decrease aperture value,
The shutter speed is increased and decreased by operating the aperture change switch OFF and (Sup) and (Sdn), respectively. The operation of the up switch (Sup) and the down switch (Sdn) is detected by the fact that the terminals (IP ₂₀ ) and (IP ₂₁ ) 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, four types of IC cards used here will be described.

(I) Custom card: This IC card selects a function (a function that can be controlled) required by the photographer from among the functions (controllable functions) of the camera (deletes an unnecessary one), or alternatively selects a function. This aims to provide a camera according to the photographer's intention and photographing technique. In addition, since unnecessary functions can be omitted, a camera which is simplified and has good operability when changing modes is provided. Next, description of the card and display contents performed on the card will be described.

First, the selection of the function of the IC card includes (i) selection of the exposure mode, (ii) selection of the function, and (iii) the relationship by operating the lens-side switch.

First, the exposure modes related to the selection of the exposure mode in (i) are as follows: (b-1) Program mode (P mode) (b-2) Aperture priority mode (A mode) (b-3) 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. Therefore, as a combination, In the four modes shown in FIG. 2A (PROGRAM is represented by P), the selected combination is displayed when the mode is set, for example, as shown in FIG. 2B. During exposure, the display of one selected exposure mode (FIG. 2 (c) (A mode selection)) is performed. The dots around the characters (or numerical values) indicate blinking. Details will be described later. The entire display is shown in FIG. 2 (a) for reference.

Next, (ii) the alternative of the function is the presence / absence of a camera shake buzzer. When this is set, the numerical value 3 in the display shown in FIG. The value "1" of the film counter indicates that there is a buzzer, and "2" indicates that there is no buzzer.

The relationship by the operation of the lens-side switch of (iii) is what AF (autofocus) mode is selected when a switch (described later) provided on the lens side is operated. The modes are as follows: first, when the switch is not operated, (E-1) one-shot in the whole area by multi-point / spot (follow-up determination after focusing) When the switch is operated, (E-2) focus Lock (E-3) Spot AF (E-4) There is continuous AF, and when setting, "CuSt-" is displayed as shown in Fig. 2 (d).
The numerical value “3” of “3” becomes “2”, and the blinking display “1” becomes “1” to “3”.
“3” corresponds to the above “E-2” to “E-4” (illustration is omitted and will be described in detail at the time of setting).

 Table 2 shows the selection numbers and functions.

In the above (i) to (III), the mode of (i) to (III) is sequentially selected by turning on the card key once at the time of setting the mode, and the mode is selected by pressing the up switch or the down switch. Function (set value) is selected. The modes (i) to (III) and the functions can be set cyclically.

(II) Program card; The program card sets the shooting scene and determines the shutter speed and aperture of the AF mode (continuous / one-shot / ranging area) AE according to the situation of the scene or the subject. Thus, it is created for the purpose of taking a picture according to a scene (details will be described later).

(III) Function card; (3-1) H / S card {(highlight / shadow) card} For this card, the white one is whiter and the black one is blacker. The value is over (+2.0) (highlight) and under (-2.0) (shadow) by a certain value. The insertion of this card (one of H / S selection) and the operation of the AE lock switch cause it to change. Is performed.

(3-2) AE bracket card This card allows the exposure obtained by the camera to be shifted by 0.3, 0.5 and 1 step to the over side and under side, respectively (details will be described later). .

(3-3) Auto shift card This is to change a shooting effect (depth or speed) by changing a combination of an aperture value and a shutter speed with respect to an exposure value.

(3-4) Defocusing card By driving the focusing lens during exposure, a soft focus effect and a zoom effect during exposure can be obtained.

(IV) Data memory card; This is for storing the data of shooting. ・ Film counter ・ Control aperture value ・ Control shutter speed ・ Exposure compensation value ・ AE mode ・ Lens information (focal length and open F _NO ) ・ Film Sensitivity data can be stored in memory, and these data can be viewed using the LCD display on the camera body (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 installed, the battery installation switch (S _RE )
Is turned off, a signal that changes from “L” level to “H” level is input to the terminal (RE), and the DC / DC converter is turned on (P
WO = “H”), the built-in clock starts oscillating, and the clock is also sent from the microcomputer (μC) to the IC card (CD) via the terminal (φ). When an interrupt occurs, DC / DC
The ON of the converter and the start of the clock are hardware circuits.
It is done automatically. Next, the microcomputer (μC) executes a [RESET] routine shown in FIG.

First, the microcomputer (μC) prohibits all interrupts to this flow (# 100), and also controls the DC / DC converter control (PW
All output terminals other than O) are set to “L” level (# 10
Five). Also, a flag in the RAM (Table 8 (described later)) and the RAM
(Register) are all reset (# 110). Thus, the exposure mode is set to the P mode, the spot / multipoint AF is set to the multipoint AF mode, the single shooting (S) / continuous shooting (C) is set to the single shooting (S), and a mode in which no exposure correction is performed, and the like are set. .

Next, in step (# 115), the number of films (N ₁ ) and the film sensitivity (Sv) stored in the E ² PROM are read and transferred to a predetermined RAM. After a while, the main switch
It is determined whether (S _M ) is ON (# 120). If the main switch is off, (IP ₆ =
(H)), proceeding to step (# 125), turning off the power supply transistor (Tr ₁ ) (PW = “L”), and performing data communication (VI) of serial data with the card.

Here, serial data communication will be briefly described. Sends a transfer start signal to the other party to perform data transfer according to the serial communication command (C _SCD =
“H”) Then, a serial clock for transfer (S _CK ) is output from the camera. The output side (camera or partner) outputs one bit of data in synchronization with the rise of the clock, and the input side (partner or camera) inputs one bit of data in synchronization with the fall of the clock. Repeat this eight times (8
Bit) to complete one data transfer,
By performing this as needed, necessary data can be obtained. The same applies to data communication with the lens (LE), data communication with the display control circuit (DISPC), and data communication with the electronic flash device (ST).

Here, the data communication (VI) with the IC card will be described with reference to FIG. 5 (f). In this communication, first the terminal (CSC
D) is set to "H" to request communication (# 270). Next, data indicating data communication (VI) is set, and the camera is set on the output side to perform data communication of data indicating communication (VI) (# 272, # 277). When this is completed, the camera is set on the input side, and waits for data to be set on the IC card side (# 280, # 282).
After performing data communication (# 285) and inputting data,
Set the terminal (CSCD) to “L” to indicate the end of communication (# 28
6). It is determined whether the microcomputer (μC) of the camera is in a state in which the camera microcomputer (μC) may sleep (stop) from the data input in this manner.
Since the clock and voltage (V _DD ) necessary for the operation of the IC card are sent to the camera (CD), these clocks and voltages are not sent during the operation of the IC card (the clock stops when the camera sleeps). This is to prevent the microcomputer (μC ₂ ) of the IC card from executing predetermined signal processing (writing control to the E ² PROM), which can be prevented beforehand.

Returning to FIG. 3, the determination described above in step (# 135)
That is, the microcomputer (μC) of the camera determines whether or not to sleep based on the input data. If the sleep may be performed here, all interrupts are permitted and sleep is performed in step (# 140). . With this sleep, the clock is stopped and the DC / DC converter is turned off in a hardware manner. If sleep is not possible, 30mse in step (# 145)
After waiting for c, return to step (# 130) and repeat the same processing.

Next, the ON or interruption by OFF of the main switch (S _M) [INT _2].

First, it is determined in step (# 147) whether or not the switch (S _M ) is interrupted by the ON operation.
(P ₆ = “H”) disables the interrupt of [INT ₁ ] (# 24
0), display data (display of all lights off at this time) is set (# 245), and the display control circuit (DISP) is set in step (# 250).
Data communication is performed with the display microcomputer C), and the flow advances to step (# 125) to perform the same processing as described above. By data communication, the display microcomputer turns off all data by inputting data for turning off all lights (see FIG. 2 (e)). The control of the display microcomputer will be described later.

On the other hand, the main switch (S _M ) is turned on in step (# 147)
If you are, step enable interrupts at (# 150) [INT _1], set the display data in the next step (# 155) (standby display), the display microcomputer and step (# 160) Performs data communication. By this data communication, the display microcomputer performs the display shown in FIG. 2 (f). In FIG. 2 (f), the P mode is selected as the AE mode, no exposure compensation, single shooting mode, multi-point distance measurement, card function
ON and the number of films are 5, respectively.

Next, the microcomputer (μC) of the camera checks whether the terminal (IP ₅ ) is at the “L” level (switches S _EM , S _FUN , S _CD ,
It is determined whether _one of S _CDS and S ₁ is ON) or not (# 17).
0), and if not “L” level, the step (# 12)
Proceed to 5) to perform the above-described sleep control. If it is at the "L" level, the process proceeds to step (# 180) to set a flag (OPF) for holding the power for 5 seconds, and then to set [S ₁ O] described later.
N] (# 190). Next, it is determined whether or not the terminal (IP ₅ ) is at the “L” level (# 20).
0). If it is "L" level, the card request signal (DSPREQ) is set to 0 in step (# 203), and then step (# 180)
And the steps (# 180) and (# 190) are repeated.
If it is not "L" level (that is, if none of the above five switches are operated), the process proceeds to the switch (# 205) to determine whether or not the power holding flag (OPF) is set. If set, step (# 21
In 5), the power holding timer is reset and started, and in the next step (# 220), the flag (OPF) is reset, and the process proceeds to step (# 235). Even when the power holding flag (OPF) is not set, the process proceeds to step (# 235),
It is determined whether or not there is a signal for requesting repetition of the S ₁ ON loop from the C card (CD).
Return to 0). This is because when the display by the display microcomputer is controlled based on the data from the IC card when data is being set or the like, even if the user wants to see the display, the power supply for 5 seconds on the camera side When the hold is expired, the display is changed to the standby display without any permission, and is performed to prohibit the display from being inconvenient to use. If there is no request for repetition, the process proceeds to step (# 237), and it is determined whether the timer has elapsed for 5 seconds.

If elapsed proceeds to step (# 150), from the standby display to the sleep control, whereas, repeated flow from [S ₁ ON] of when not reached step (# 190).

When an IC card (CD) is mounted on the camera, in step (# 172), a display request signal (DSPRE
Q) is set in step (# 172), and then step (#
Go to the flow after 180).

Next, the routine of [S ₁ ] for controlling photometry, AF and display 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 PNP via inverter (IN ₁ )
And ON the transistor (Tr ₁₎ by applying a base to a low level type transistor (Tr _1), photometric circuit (L
M), supply power to the AF circuit (AF _CT ), etc. Next, information specific to the interchangeable lens is input from the lens circuit (LE) (# 41)
0). This is shown in FIG. 10 and explained. First, the terminal (CSL
E) is set to the “H” level (# 600), serial communication is performed as many times as necessary, and information is input from the lens (# 60).
Five). FIG. 4 (a) shows the circuit in the lens. The clock input from the camera is counted by the decoder (2) to generate an address signal. At this time, when the address reaches a predetermined address, the lens data is changed by zooming. Therefore, the focal length is detected by the encoder (3) that detects the focal length, and the address circuit (5) is detected.
The address is changed according to the focal length, and predetermined data is output to the camera body. The switch (S _Q ) is a lens-side switch (see FIG. 4 (b)) provided on the lens (10), which also changes the address because data must be changed. The address set in this way is output to the ROM (6). R
The OM (6) outputs data based on the specified address. This output is converted into a serial signal by a parallel / serial conversion circuit (7) and supplied to the camera body.

Next, the lens information will be described. As shown in Table 11, the lens information sent to the camera body is the lens mounting signal, the lens aperture value (Avo), the lens maximum aperture value (Avmax), the aperture amount from ∞ to near, and the focal length. Information, (lens drive amount / defocus amount) conversion coefficient, ON / OFF of the lens side switch (S _Q ), information indicating whether the lens can be driven (LOK), etc. Input to the RAM at the address in the body. This signal (LOK)
When the state becomes such that AF cannot be performed, "1" is changed to "0" accordingly. The camera body is
The motor is stopped by inputting this signal.

On the other hand, the lens (10) side has a ROM and address configuration as shown in Table 9. (A) and (B) are the same
Two similar data differ only S _Q relationship and LOK relationship in the ROM is a memory. Conventionally, there is relatively little lens information, and one type of ROM can store a plurality of types of lens information having the same function, and switch lens information according to the lens used. In this case, the amount of information per lens is fixed, and the required RO
M has been decided. In such a case, creating (increasing) new data indicating that the data depends on the ON / OFF state of the switch requires two additional steps when changing the address of the ROM by changing the address according to the ON / OFF state of the switch. Byte (ON, OFF)
Is required. If there is room in the ROM, the first
To increase the 2 bytes that 06 _H, 08 _H, as shown in Table 0,
The address may be changed according to the OFF / ON of the lens side switch (S _Q ) to select 06 _H or 08 _H. However, when there is no such margin, as shown in Table 9, the ROMs provided for a plurality of types (in this embodiment, (B)) have the same data except for the data to be changed by turning on and off the switches. It is possible to select (A) or (B) according to the OFF / ON state of the switch. However, in this case, this ROM
The types of lenses that can be used are reduced. In the lenses in Table 9, when the lens-side switch (S _Q ) is OFF, one of 06 _H and 07 _H or 08 _H is used.
6 _H and 17 _H (bo = 0, AF motor stopped) will be sent. Note that (xxx) in the address indicates address data that is changed according to the amount of extension of the zoom or focusing lens, and is input from the encoders (3) and (4).

The signal (LOK) in the lens indicates that the lens is not for focus detection. Upon receiving this signal, the camera body prohibits the AF operation (lens drive) and performs only the focus detection operation. This address 07 _H as an AF operation prohibited when it is macro mode in the macro with the zoom lens example (Table 10), 08 _H (Table 9), the address 09 _H (10 as an AF operation permission when not in macro mode
Table), 07 data _H (Table 9) is sent.

Even if a lens with the above switch (S _Q ) function is attached to an old camera that does not read this bit (because of new data), the function of this lens side switch (S _Q ) will be retained. (When changing the function by IC card --- Focus lock, Continuous, Spot AF selection --- The latter two cannot be done because the IC card is not the old camera, If only the focus lock is possible), and if the LOK signal is set to prohibit AF in response to the ON of the switch (S _Q ), the old camera is regarded as a lens that can not perform AF, prohibiting AF operation and only detecting focus. Do. To execute this, when the switch (S _Q ) is turned ON, B in Table 9 is used, 07 _H and 08 _H are used in Table 10, and the switch (S _Q ) is used.
In the OFF state, A in Table 9 and 06 _{H in} Table 10 and any one of 07 _H and 09 _H may be changed.

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

After inputting the lens information described above, the terminal (CS
LE) is set to the “L” level and the process returns (# 610).

Returning to FIG. 6, the microcomputer (μC) performs data communication (I) with the card in step (# 413). In this data communication (I), the camera switch status, AE mode, and control data are sent from the camera to the IC card.

The contents are shown in the CACD table (see the column of I-communication). The data communication (I) is shown in FIG. The communication method is almost the same as the data communication (VI) in FIG. 5 (f) described above. The data communication (SIO) is three times, and the camera side is the output side in this communication as well. The use of these data will be described later.

Next, the microcomputer (μC) inputs information on the electronic flash device from the electronic flash device (ST) (# 415). The information includes a guide number (GN) indicating the amount of light emission, and a switch ON.
There are two pieces of information indicating / OFF. Here, the electronic flash device used in this embodiment will be described.

FIG. 8A shows a circuit block diagram of the electronic flash device. (D ₁ ) is a capacitor for preventing reverse charging, (C ₁ ) is a large-capacity backup capacitor, (μC ₃ ) is a microcomputer that performs sequence control, and (TM) is a pulse that indicates the type of serial communication from the camera body. Is a detection circuit that detects the width of the signal and outputs a signal indicating the type of communication to the microcomputer (μC ₃ ). (D / D) is a booster circuit for converting a low voltage to a high voltage, and starts and stops boosting by a signal from a microcomputer (μC ₃ ). (D ₂ ) is a rectifier diode, (CM) is a main capacitor that stores energy from the booster circuit, (LE
C) is a light emission control circuit for controlling light emission, and (DISP) is a display circuit. As shown in FIG. 8 (b), whether or not the power is ON (a state in which boosting and data communication with the camera can be performed by a signal). When ON, the display shows ON, and when OFF, nothing is displayed. (I / O CC) is an input / output switching circuit for switching input / output of communication with the camera.
(S _M ) is a normally open push switch for switching the power ON and OFF, and is switched OFF when the power is ON and ON when the power is OFF. (MONT) is a circuit for monitoring the light emission amount itself, and outputs an "H" signal when the light emission amount becomes 1/4 of the total light emission. (L ₀ ) is a normally open switch that switches the amount of light emission between 1/4 and full light emission.
Switch to 1/4 full emission.

A flowchart of a microcomputer (μC) for performing sequence control of the electronic flash device will be described with reference to FIG. 8C and thereafter.

When the power switch (S _M ) is operated, the microcomputer (μ
C ₃ "H" (terminal) is input a signal changes from being pulled up) internally to "L", takes an interrupt to the microcomputer ([mu] C _3), the microcomputer ([mu] C ₃₎ is 8 ( The flowchart shown in c) is executed. In this flowchart, first, it is determined whether or not a flag (ONF) indicating the power-on state is set (# ST10). When the flag is set (ONF = 1), this flag is reset to set the terminal (OP ₂ ) to the “L” level in order to stop boosting, to turn off the display of ON and to sleep (# ST20 to # ST40). When the flag (ONF) is not set, the flag (ONF) is set as an operation from power OFF to ON, and the terminal (OP ₂ ) is set to the “H” level to start boosting (# ST50, # ST6).
0). Then, ON is displayed (# ST70). Next, the timer is reset and started (# ST80), and waits for 5 minutes to elapse (# ST90).
Sleeps with the same control as OFF.

Next, FIG. 8 (d) shows and explains an interrupt process [INT ₁ ] performed when a request for data communication for transmitting data from the electronic flash device to the camera is made from the camera.
First, when an H signal having a pulse width (T ₁ ) is sent from the camera, the detection circuit (TM) detects this time (T ₁ ) and sends the signal to the (INT ₁ ) terminal of the microcomputer (μC ₃ ). A signal that changes from “L” to “H” level is output. The microcomputer (μC ₃ ) receives this change signal and performs an [INT ₁ ] interrupt process.

The terminal (φ ₁ ) always operates when a battery is mounted, and the microcomputer (μC ₃ ) is connected via this terminal (φ ₁ ).
Sends a clock to the timer detection circuit (TM).

The microcomputer (μC ₃ ) first resets the timer by setting the terminal (OP ₁ ) to “H” level, sets all outputs of the timer to “L” level, and does not respond to the input of a signal to the timer. (# ST110). And power O
Whether the flag indicating the N (ONF) is set determined in step (# ST120), it sets the bit for data communication to (STS ₁₎ to "1" when it is set (# ST13
0), terminal (O) in step (# ST140) to start boosting
P ₂ ) is set to “H”, and the routine proceeds to step (# ST180). On the other hand, when it is not set, the bit (STS ₁ ) is reset and the process proceeds to step (# ST180) (# ST150). If a signal for releasing guide number restriction has been input from the camera, the process proceeds to step (# ST183) to control release of guide number restriction. When the signal is not input, it is determined whether or not the guide number limit switch (L ₀ ) is turned on. When the switch is turned on (IP = “L”), a flag (L ₀ LMTF) indicating this limit is set. It is determined whether or not is set (# ST181, # ST182). When it is set, it is reset and the terminal (OP ₄ ) is set to “L” level to inhibit the light emission stop signal from the monitor circuit (MONT) from being input to the light emission control circuit (# ST183, # ST184). .

Set this when the flag (L ₀ LMTF) is not set, to allow the light emission amount limit pin (OP ₄₎ as "H" level, sets the data (STS ₃₎ for communication (# ST186 ,
# ST187). If the switch (L ₀ ) has not been turned on, the process proceeds to step (# ST190).

Incidentally, this step (# ST190) is replaced by a step (# ST18).
Also comes from 4) and (# ST187).

In step (# ST190), the terminal (I / OC) is set to the "H" level so that the electronic flash device (ST) serves as the output side and indicates an output to the input / output switching circuit (I / OCC). The signal of the bit (STS ₁ ) and the 5-bit signal indicating the guide number corresponding to the electronic flash device (ST) are set (# ST20).
0), waits for the data communication clock (SCK) from the camera body, and when the clock (SCK) is sent, the terminal (S _OUT ) and input / output switching circuit The communication for outputting data through (I / OCC) is controlled (# ST210). Upon completion of this pin (OP ₁₎ in the "L" level (# ST220), and resets the timer, and the pulse width from the camera can be detected at any time.

When a pulse width (T ₂ ) signal is input from the camera, the timer (TM) sets the (FC) terminal to the “H” level. The microcomputer (μC ₃ ) inputs this to the terminal (IP ₁ ), and the step (#S
Proceed from (T230) to (# ST240).

In step (# ST240), the terminal (OP
₁ ) is set to “H” level, and the terminal (I / O
C) is set to the “L” level (# ST250), and the electronic flash device is controlled to be on the input side. Then, the camera data transmitted in synchronization with the communication clock (SCK) from the camera is input to the terminal (S _IN ) through the input / output circuit (I / OCC),
This is read into a predetermined register (RAM) (# ST260, #S
T270). Then, the terminal (OP ₁ ) is set to the “L” level so that pulses from the camera can be received (# ST28).
0). Input / output of light emission / no power, forced power supply O
The signal of the presence / absence of the FF and the presence / absence of the signal emission of the power ON / OFF of the forced power ON are input.

In step (# ST290), it is determined whether the power is forcibly turned on based on the input data. If not forcibly ON (# ST330). On the other hand, when indicating the forced ON, the flag (ONF) indicating the power ON is set, the terminal (OP ₂ ) is set to the “H” level to start the boosting, the ON is displayed, and the process proceeds to the step (# ST330) ( # ST300 to # ST320).

In step (# ST330), it is determined whether the power is forcibly turned off based on data from the camera. At the time of forced OFF, the microcomputer (μC ₃ ) turns off the display of ON, resets the flag (ONF) indicating power OFF, sets the terminal (OP ₂ ) to the “L” level, stops boosting, and sleeps (# ST420 ~ # S
T440). On the other hand, when not forced OFF, sleep (# ST34
Proceeding to 0), the timer is reset and started, and it is determined whether or not 5 minutes have elapsed (# ST350). If five minutes have elapsed, the process proceeds to step (# ST420), and the same control as forcible OFF is performed. If 5 minutes have not elapsed, it is determined whether or not exposure control has been entered (# ST360). If exposure control has not been entered, control returns to step (# ST350), and steps (# ST350) and (# ST360). repeat. The signal from the camera indicating that the exposure control has been started is a pulse width (T ₃ ) signal input through the terminal (ST ₁ ). The detection circuit (TM) detects this and sets the terminal (EC) to "H" level. When this signal is input, the microcomputer (μC ₃ ) resets and starts the timer (# ST370), and based on the signal indicating the presence / absence of light emission sent from the camera, the terminal (OPC) ₃₎ "H" level (# ST400), when not exhibit luminescence by terminals (OP ₃₎ to "L" level, the process proceeds to each step (# ST 412). In this step (# ST412)
When the switch (S ₂ ) is turned ON, the front curtain of the shutter has completed running + α
Time (150msec) to (Emission time of electronic flash device)
, The terminal (OP ₁ ) is set to “L” (# ST415), and even if an interrupt pulse from the camera is received, processing can be performed, and the process proceeds to the switch (# ST80) in FIG. 8C.

In the circuit of FIG. 8A, the AND circuit (AND ₁ ) operates only during the exposure control operation, and receives a dimming completion signal. The AND circuit (AND ₂ ) determines whether or not to permit the light emission signal sent from the camera. Microcomputer (μC ₃ ) based on signal from camera
Sets the terminal (OP ₃ ) to “H” / “L”.

 Next, the interface circuit will be described with reference to FIG.

The signal (CSST) indicating the type of data communication (the pulse width changes according to the type) to the electronic flash device (ST), the clock (SCK) at the time of communication, and the signal indicating dimming completion are OR circuits
The signal is supplied to the electronic flash device (ST) through (OR ₂₁ ). When one curtain of the shutter is completed, the X contact (X) is turned on (this is turned off by the charging operation during winding), and a high-level “H” signal is output from the terminal (XT).

(I / OCG) is an input / output switching circuit.
The direction (input or output) of data communication to the electronic flash device (ST) is switched according to the signal from C).

In FIG. 11 (a), the microcomputer (μC) of the camera outputs a pulse having a width of a fixed time (t ₁ ) to the terminal (CSFL) in order to perform data communication with the electronic flash device (input on the camera side). The / OC terminal is set to the "L" level, the input / output circuit is set as the input side, and the electronic flash unit waits for data setting, and performs data input by serial communication once ((# 650 to # 65)
Five).

Referring back to FIG. 6, the AF mode is determined in step (# 417). FIG. 7A shows a subroutine for determining the AF mode. First, it is determined from the lens information whether or not the above-mentioned lens-side switch (S _Q ) is ON (# 400).
0). When this switch is ON, the flag (OPF) is set by the switch (# 4005) to reset and start the power holding time (starting from 10 seconds), and the data communication (II) (described later) is performed. ON / OFF of input card function
It is determined whether the card function is ON or OFF based on the signal (# 4007).

If the card function is OFF, the based on the E ² information PROM in the camera, and controls the AF mode of AF previously stored.

On the other hand, if the card function is ON, it is determined whether the custom cards, if not a custom card, and controls the AF mode again based on E ² information PROM in the camera.

If the card is a custom card, the AF set in the card entered from the card during data communication (IV) (described later)
Perform AF control based on information.

Note that the control is the same when the AF mode is determined by the E ² PROM in the camera and when the AF mode is determined by the E ² PROM in the custom card. ² Perform this only when determining the AF mode with the PROM.

The microcomputer (μC) reads information from the E ² PROM in the camera, and determines in step (# 4010) whether or not the AF mode is the focus lock mode. Here, in the case of the focus lock mode, the bit (Fb ₁₄ ) of the focus lock by the switch (S _Q ) is set, the bit (Fb ₁₃ ) indicating the auxiliary light mode is reset, and the display of the follow-up mode is attached. At times, the flag (following F) is reset to turn off the light (# 4020 to # 4030).

This is because the AF operation is prohibited in the focus lock mode, so no subsequent AF operation is required.
It is for prohibiting the emission of the auxiliary light required for this and to achieve power dissipation.

The follow-up display is also useless after the focus lock because the lens is not driven and the follow-up operation is not possible, so that the follow-up flag is reset and turned off.

Next, it is determined whether the AF mode is spot AF (#
4035). This step (# 4035) also comes when the focus lock mode is not set in the above step (# 4010). If it is spot AF, switch (S
It is determined in step (# 4036) whether or not a flag (SQONF) indicating that the flow has passed this flow for the first time since _Q ) is turned on. If not, the flow proceeds to step (# 4037). in the switch (S _Q) is so as to store a multi-point / spot mode before turning on, transferred the contents of bit (Fb ₂₎ bit (Fb _15), resets the flag (SQONF) (# 4038) In step (# 4040), the spot mode is set (Fb ₂ = 1), and the process proceeds to step (# 4045). If the flag (SQONF) is set, the process skips step (# 4037) and proceeds to step (# 4045). In step (# 4045), it is determined whether or not continuous AF, and if continuous AF, a bit (Fb ₈ = 1) indicating this is set (# 4050), and a bit ( Fb ₁₃ ) is reset in step (# 4055) and the routine returns. Now, it is assumed that the auxiliary light mode for the continuous AF is prohibited in consideration of power saving.
In continuous AF where the focus adjustment never ends, the auxiliary light is emitted every time focus detection (integration) is performed.
This is because the battery, which is a power supply, is quickly consumed, and the number of films that can be taken decreases. Step (# 4045)
If it is not continuous AF, return immediately. In the flow when the switch (S _Q ) is on,
Since only one of focus lock, spot AF, and continuous AF is set in the IC card, for example, if the focus is locked in step (# 4010), steps (# 4035) and (# 4035) are performed. In # 4045), both are NO.

In the above step (# 4000), the switch (S _Q ) on the lens side is
If it is OFF, go to step (# 4060). In this step (# 4060), the bit (F
b ₁₄ ) is reset.

The switch (S _Q) spot AF is selected, whether it is OFF immediately after the control of the switch (S _Q) flag (SQO
NF) is set (# 4065).
If set, the contents of bit (b ₁₅ )
By moving to (b ₂ ), the spot AF using the switch (S _Q )
The multipoint / spot before selection is obtained (# 4070).
Then, the flag (SQONF) is reset and the step (# 4
087). In step (# 4065), the flag (SQO
If NF) is not set, it is determined whether or not IC card (close-up card) is used for forced spot AF. If it is forced spot AF, a bit (Fb ₂ ) is set to indicate spot AF, and step (#) 4087). Forced spot AF
If not, skip step (# 4085) and proceed to step (# 4087). Next, in step (# 4087), it is determined whether or not the camera is in forced continuous AF based on a signal input from a card (sport card). If the camera is in forced continuous AF, a bit (F
b ₈ ) to set the bit (F
b ₁₃ ) is reset and the routine returns (# 4088, # 4089).
If it is not forced continuous, the bit (Fb ₈ ) indicating one-shot AF is reset (# 4090) and the routine returns.

After determining the AF mode, the microcomputer (μC) performs card data communication (II) with the IC card (CD) to determine the type of the IC card (CD) (# 420). The card data communication (II) will be described with reference to FIG.

In this data communication, first, data indicating data communication (II) is sent from the camera to the card (one serial communication) (# 320 to # 327), and the camera becomes the input side (# 33).
0) and wait (# 332), perform serial communication 10 times
Obtain 10 bytes of data (# 335). To briefly explain the contents of this data, the first four bytes are data for controlling individual functions of the camera according to the card (details will be described later).

The next 5th and 6th bytes are the missing bytes, and the 7th and 8th bytes are to specify the number of data to be output and the start address during the following data communication (IV) (camera input). Is referred to as a “directly designated address type”. Next
The 9th and 10th bytes are for inputting necessary data by specifying the data group to be output to communication (III) and communication (IV). In particular, the 9th byte is for communication (III) and communication (III).
The tenth byte indicates communication (IV), which is called a “group designation type”. Then, these two designation methods are switched by the card using the third byte (b ₆ ) of the above four bytes, and data communication for sending only necessary data is performed, thereby efficiently reducing time. ing. Returning to FIG. 6, it is determined whether or not the AF prohibition data input in communication (II) is set (# 425).
When it is not set or when self-timer is not being performed (SLP = 0), it is determined whether or not the AF start switch (S ₁ ) is ON based on the level of the terminal (IP ₅ ) (# 42).
7). When the above switch (S ₁ ) is ON (IP ₅ =
"L" level), controls AF (# 429), and switches (S
It sets a flag (S ₁ ONF) indicating the ON ₁₎ (# 430).

AF based on data input from card in communication (II)
When prohibited data is set, self-timer is in progress, or switch (S ₁ ) is OFF (IP ₅ = “H”)
Level), a signal to stop the AF drive motor is output to the lens control circuit (LECN) to prohibit AF operation, stop lens drive (# 431), and confirm that AF is not being performed. sets a flag (AFNF) showing (# 435), further resets the flag (S ₁ ONF) indicating the ON switch (S ₁₎ (# 437). When the data setting mode is set in this way, the AF operation is prohibited in the card example and the data setting is prioritized, so that the AF operation can be performed even if the AF start switch (S ₁ ) is accidentally pressed during data setting. Not to be done. When the flag (AFNF) is set, a signal (AEFLAG) indicating that the image magnification data cannot be used.
B ₁ ) to “0” to exchange data with the card (III)
Output when.

Here, the above-mentioned AF control will be described with reference to FIG. 14 showing the focus detection range in the shooting screen with reference to the flowcharts shown in FIGS. 12 (a) to 12 (h). At this time, the photometric range will also be described.

First, in FIG. 14, the outer rectangle (12) indicates a shooting screen. (LM ₁ ) to (LM ₄ ) indicate the metering range,
(AF ₁ ) to (AF ₃ ) indicate focus detection ranges. 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), multipoint A
When F is selected, the above three ranges (AF ₁ ) to (AF ₃ )
Focus on the subject closest to the camera.
AF is performed. Hereinafter, (AF ₁ ) is referred to as a first island, (AF ₂ ) is referred to as a second island, and (AF ₃ ) is referred to as a third island.

To explain the AF control shown in the flowchart of FIG. 12A, first, a flag (S ₁ ONF) is determined to detect whether the AF start switch (S ₁ ) is pressed for the first time, When not set, it is assumed that the button is pressed for the first time, a flag indicating AF (AFEF), a flag indicating low-con scan prohibition (LSIHF), and a flag indicating the beginning of low-con scan (L
SFI) and reset them (# 702, # 703, # 704)
Proceed to step (# 705). The low contrast scan and these flags will be described later. If it is set, the process directly proceeds to steps (# 705) to (# 704) without passing through step (# 702). Then, based on an input signal from the lens, it is determined whether or not the lens is mounted (# 705). If the lens is not mounted in step (# 705), a flag (AFNF) indicating that AF is not performed is set and the routine returns (# 80).
0).

If a lens is attached, whether the forced AF mode (forced to be the AF mode even if manual focus adjustment is selected by operation and the lens can be driven by the motor) is selected by the card Is determined (# 70
7). If the mode is the forced AF mode, the process proceeds to step (# 711).
On the other hand, when not in the forced AF mode, the focus adjustment mode
The mode / M mode is determined by the level of the terminal (IP ₁₀ ) (# 710). If the mode is the AF mode, a bit (Fb ₁₄ ) is used to determine whether the focus lock mode is selected in step (# 711). Determined by In the M mode, the auxiliary light mode is prohibited in step (# 798) (F
b ₁₃ = 0). After executing the manual focus subroutine [MFOCUS] in the next step (# 799), a flag (AFNF) indicating that AF is not performed is set (# 80).
0), it is determined whether or not the camera is in focus (# 780). If the camera is in focus, a flag (AFEF) is set (# 781). If the camera is not in focus, the flag is reset (# 782) and the process returns.

This manual focus subroutine is described with reference to FIG. 12 (d). First, a flag (MFF) indicating manual focus is set, and integral control is performed to control integration and execute data dump. And in manual focus, of the three islands in the AF area,
Sets a flag (AF2F) showing the second island, it calculates the defocus amount of the island (DF _2), which as a defocus amount, the process returns (# 4100～ # 41
Ten).

To illustrate shows a subroutine of the integral control in the above-described step (# 4101) in Fig. 12 (b), first, when a focus undetectable (LCONF = 1), or when not in the auxiliary light mode (Fb ₁₃ = 0) Then, the process proceeds to step (# 4163) without performing the auxiliary light emission (# 4150, # 4155). When focus detection is not possible and the mode is the auxiliary light mode, the terminal (OLD) is set to the "H" level for a fixed time to emit light before the start of integration and to emit light for a fixed time, and the step (# 4) is performed.
163) (# 4150 to # 4160).

In step (# 4163), the count (CT) of the delivery amount (number of delivery pulses) is read and set to (CT ₁ ). Next, integration is performed, and after the integration is completed, the count (CT) is read again, and this is set as (CT ₂ ) (# 4165, # 4167). (CT ₁ )
Then, the average of (CT ₂ ) and (CT ₂ ) is obtained, data is input (dumped) as (CT ₁₂ ), and the process returns. (# 4168, # 4170).

Returning to FIG. 12 (a), if manual focus adjustment is not performed in step (# 710), or forced AF is performed in step (# 707)
If the mode is the mode, it is determined in step (# 711) whether or not the focus lock mode is selected. As a result of the determinations in steps (# 710) and (# 711), in the AF mode,
If the focus lock is selected by the switch (S _Q ), driving of the lens is stopped in step (# 712), and it is determined whether the lens is in focus by setting the flag (AFEF) (# 713). If it is set, the process proceeds to step (# 714), the M focus is controlled, and the process proceeds to step (# 780). If not set, the process proceeds to step (# 799). Here, the focus is determined because if the focus is locked after focusing, the photometric value is determined using the distance data of the subject at the time of focusing (used for image magnification) when determining the photometric value. It is.

AF is determined in step (# 710) of FIG.
When the focus is not locked in the next step (# 711) (Fb ₁₄ = 0), the flag (AFNF) indicating that AF is not performed is reset in step (# 715), and the step (# 717) is performed. Resets the flag (MFF) indicating manual focus. 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). ). Then, in step (# 730), whether or not spot AF is detected (detected by Fb ₂ in the function data), spot AF (Fb ₂ = 1)
If so, the flow advances to step (# 735) to execute the spot AF subroutine shown in FIG. 12 (d). In this subroutine, a flag (AF2F) indicating that AF is being performed is set based on the second island, the defocus amount (DF ₂ ) of the second island is calculated from the input data, and this is used to drive the lens. (# 41
02 to # 4110).

On the other hand, if the multi-point AF mode is selected in step (# 730) of FIG. 10 (a), the process proceeds to step (# 740) to execute the normal AF control subroutine shown in FIG. 10 (c). I do. At this time, the defocus amounts (DF) of the first, second, and third islands are calculated, and the defocus amount for the subject closest to the camera is calculated (# 42).
00 to # 4215).

The subroutine for determining the defocus amount is shown in FIG. 12 (f). The defocus amount is negative when the front focus is set (the subject is far from the focus position of the lens), and when the rear focus is set 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. 12 (f), the microcomputer (μC) first resets the flags (AF1F to AF3F) indicating the island, detects the maximum 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).

After calculating the defocus amount, it is checked in step (# 745) in FIG. 12 (a) whether focus detection is impossible (data is not reliable) (for example, it is determined whether the contrast is low, If the focus detection is not possible, the process proceeds to step (# 747) to determine whether the mode is the auxiliary light mode, and if the mode is the auxiliary light mode, further focus detection is performed. Since it is useless, a flag (LCONF) indicating this is set (# 752),
The flag indicating the tracking mode (described later) is reset (# 755), and the process returns. In step (# 747), if the mode is not the auxiliary light mode, the process proceeds to step (# 757) to detect whether the luminance is low. If the luminance is not low, it is useless to emit the auxiliary light. Controls scanning. The low contrast scan refers to performing focus detection while driving a lens to search for a focus detectable area when focus detection is not possible. This is shown in FIG. 12 (h) and explained. First, a low contrast scan was performed, but a flag (LSIH) indicating that no focus detectable area was obtained.
It is determined whether or not F) is set (# 4400).
When it is set, it returns because it is useless to perform the low contrast scan any more. If it is not set, it is determined whether or not a signal indicating low-con scan prohibition is input from the card (# 4405). If it has been input, the process returns without performing the low contrast scan. If not input, it is determined whether or not a flag (LSFI) indicating that this flow has been executed is set (# 4410). If not, this is set (# 4415) and the feeding direction is set. Is set (# 4420), and the lens drive amount n is set as a positive value (large K) larger than the maximum lens extension amount (# 4425).
The lens is driven for extension. When the flag (LSFI) is set, it is determined whether or not the lens has reached the extreme end of the extension or the extreme end of the extension (# 443).
0) If not, return. When the lens comes, the lens is stopped (# 4430), and it is determined whether or not the extension was made before the stop (# 4440). A hard timer (not shown) operates for the detection of the extreme end, and the hard timer is reset and started every time a pulse from the encoder comes. When the timer measures a predetermined time, the lens is in a state where the lens cannot be driven and the leading end or the leading end is detected. Then, in the case of the extension (FWF = 1), this is reset (# 4445), and the lens drive amount is set to-(K
Large) (# 4450) and return. When the flag is not set, it is assumed that both the feed-out and the feed-in are performed, and it is useless to perform the low contrast scan any more. Therefore, the flag (LSIHF) is set to indicate this (# 4).
455), return. Then, the process proceeds to (# 752), proceeds to step (# 752), and performs the same processing as described above.

On the other hand, if the luminance is low in step (# 757) of FIG. 12 (a), it is determined in step (# 758) whether or not the mode is the auxiliary light prohibition mode from the card. ) To prohibit the AF by the auxiliary light emission. If the mode is not the prohibition mode, the auxiliary light mode (Fb ₁₃ = 1) is set in step (# 760) and the step (# 755)
Proceed to.

Next, when the microcomputer (μC) cannot detect the focus, the microcomputer resets the flag (LCONF) (# 762) and determines whether or not the lens is in focus from the lens driving defocus amount (# 76).
If it is determined in 5) that the object is in focus, the flag (AFEF) indicating the in-focus state is set (# 767), and the flag (AFEIF) is set, and the process proceeds to step (# 755).

If focus is not achieved in step (# 765), the flow advances to step (# 775) to execute a lens drive control subroutine, and then returns. This subroutine is shown in FIG. 12 (e) and explained. It is determined whether or not a flag (following F) indicating the following mode is set (# 424).
8). If the mode is the following mode, the process proceeds to the switch (# 4330).
When the flag (follow-up F) is not set, one-shot AF (stops driving the lens once focus is achieved, focus detection can be stopped at this time) or continuous AF (after focusing) Data that follows the subject and drives the lens according to the obtained defocus amount)
(Fb ₈ ) (# 4250). In the case of one-shot AF (Fb ₈ = 0), it is determined in (# 4255) whether or not a flag (AFEF) indicating in-focus is set. In the case of not being set, or in the case of continuous AF (Fb 8) ₈ =
In step (1), the process proceeds to step (# 4340) through steps (# 4330) and (# 4335) to control the lens drive. In step (# 4330), the flag (AFEF) indicating the focus is reset, in step (# 4335), the lens drive amount is reset, in step (# 4335), the lens drive amount is determined, and in step (# 4340) Drive the lens and return.
The lens drive in this step (# 4340) is performed by the lens drive circuit (LECN) driving the lens by a value corresponding to the drive amount (N).

FIG. 12 (g) shows the subroutine for determining the lens driving amount described above. The microcomputer (μC) determines whether or not a flag (following F) indicating the following mode is set (# 4341). If not, the process proceeds to step (# 4345). When the flag (following F) is set, the defocus amount (DF) obtained this time is set to (DF ₁ ) (# 4342). And the defocus amount DF = DF +
_{(DF-DF 2) (DF} 2 the previous defocus amount, i.e., in addition has to this the difference between the previous and the current defocus amount) seeking, step as the _{(DF 2) (DF 1)} (# 4345 Proceed to).
In step (# 4345), K
The lens drive amount (N) is obtained by multiplying the value. The number of lens extension pulses at that time is read to be (CT ₃ ), and ΔCT ₃ −
In CT ₁₂ , ΔCT is obtained as the amount of movement of the lens from the center of integration, and ΔCT is subtracted from N to obtain the lens drive amount at the end of the calculation, and the process returns (# 4346) to (# 4348).

In step (# 4255), if the in-focus flag (AFEF) is set,
Go to 57). Then, it is determined whether or not the camera is in forced one-shot AF.
This prohibits the following mode during forced one-shot AF. When the tracking mode is the normal one-shot AF mode which is not prohibited, it is determined whether or not a flag (AFEIF) indicating from the non-focusing state to the in-focus state is set (# 4260). If it is set, preparation processing for following determination (determining whether the subject is moving) to be described later is performed. First, in step (# 4265), the register (DF ₂₎ to the memory defocus amount, (DF ₃₎ resets the, the same register (DF _1), the defocus amount (DF) is a memory which is determined (# 4270), the variable (N) is set to 0 (# 4275), (AFE1F) is reset (# 4280), and the routine returns. In step (# 4260), after focusing (AFEF = 1), when performing the second or subsequent focus detection (AFE1F = 0), the process proceeds to step (# 4285), and sequentially defocuses in a register for storing the defocus amount. amount to continue to memory [register (DF ₂₎ register contents (DF _3), the content of the register (DF ₁₎ in the register (DF _2),
The obtained defocus amount (DF) is stored in the register (DF ₁ ).] 1 is added to the variable (N), and if this (N) is 2 or more,
That is, it is determined whether or not focus detection has been performed three times after focusing, and if the focus has not been detected twice or more, the process returns without driving the lens (# 4285-
# 4305).

In step (# 4305), if the operation has been performed three times or more (N ≧ 2), the process proceeds to step (# 4310) and the past three
The defocus amount is determined by the average of the defocus amounts of each time (the average of the contents stored in the register), and in the next step (# 4315), it is determined whether or not this value is a predetermined value K or more. This means that it has been determined whether or not the subject is moving at a predetermined speed (on the image plane) in the past three focus detections. If it is less than the predetermined value, it is determined that the subject has not moved, the tracking flag is reset (# 4320), and the process returns.

This flag is used for display (in finder). On the other hand, when the defocus amount is equal to or larger than the predetermined value, when the subject is moving, a flag (following F) is set as the following mode (# 4325), the lens driving amount is obtained, and the lens is driven. Return (# 4330, # 434
0).

Here, the display in the finder related to focus detection will be described based on the display in the finder shown in FIG. 13. (101) indicates focus or focus detection disabled, When set based on F), the LED is turned on by a green LED, otherwise, it is turned off when (focus F = 0). When the focus cannot be detected (LCONF = 1), the LED is turned on and off by a red LED, and when not (LCONF = 0), the LED is turned off. (102)
A focus detection area is shown. When the inner area (102) is displayed, spot AF is shown, and when only the outer area (102b) is displayed, multipoint ranging is shown. (103) is displayed when the continuous mode or the following mode is indicated (following F = 1), and is turned off when neither the continuous AF mode nor the following mode is set. (104) “AF / M” is A
In the F mode (AFNF = 0), AF display is performed. In other cases (AFNF = 1), M display is performed. Note that the AF switch (S ₁ ) is
When F (S ₁ OFF = 0), the display in the viewfinder is turned off.

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

This is shown in FIG. 15 and explained. Based on the data input from the card, it is determined whether or not the display control mode (data is being set) from the data input in communication (II) (# 90).
5) If the mode is the display control mode from the card (during data setting), return. When not in the display control mode, it is determined whether or not a flag (SLP) indicating that the self mode time is being measured is set (# 907). Returns when set. When it is not set, it is determined whether or not the exposure mode change switch (S _EM ) is turned on (# 910). When it is turned on, a subroutine for this change (# 915)
And return (details are described later). The above switch
If (S _EM ) is not ON, the process proceeds to step (# 920) to determine whether the function change switch (S _FUN ) is ON. When the switch (S _FUN ) is ON, the process proceeds to a subroutine (# 925) for the change.

Here, the two subroutines will be described with reference to FIGS. 16 and 18, respectively. First, the exposure mode is changed. Each time the up switch (Sup) is turned ON once, P → A
It proceeds in a cyclic manner so that it proceeds in the order of → S → M and further returns to P. Each time the down switch (Sdn) is turned ON once, it proceeds in the order of P ← A ← S ← M, and the next to P is M It advances cyclically in the opposite direction to the above-mentioned upward direction, but according to the exposure mode set by the IC card (CD) according to the E ² PROM data in the camera or the data in the custom card. Mode that has been changed and not selected is skipped.

This will be described with reference to FIG.
C) ON / OFF of the card function input in data communication (II)
Based on the signal, it is determined whether the function of the card is ON (# 1000). If it is not ON, enter the camera control. If it is ON, it is determined whether or not it is a custom card (# 1001). If it is not a custom card, it is determined in step (# 1002) whether or not a signal of the forced P mode is input from the camera. Return to the P mode (# 1003). If the forced mode, enter the camera control for determining the AE mode E ² PROM set is memory to the possible AE mode within the camera. On the other hand, if the card is a custom card, the data (EECSTM
= 0, 1), the AE mode is determined from the settable AE modes stored in the card.

Only the difference in the data to be selected for the selection of the P, A, S, and M modes (camera E ² PROM, card data) and the control of the selection are exactly the same, so the explanation uses the E ² PROM data in the camera. Control only. The microcomputer (μC) determines whether or not the up switch (Sup) is turned on in step (# 1004), and proceeds to step (# 1055) if not turned on. If it is ON, the process proceeds to step (# 1005), where (Fb ₀ ) (Fbn) of the function data (Fbn) of the RAM
₁₎ examined, P mode as the exposure control mode is determined whether the currently selected, the process proceeds to step (# 1010) if it is selected, or A mode is selectable internal E ² Judgment is made based on the bits of the PROM. If it is selected, the exposure mode is changed from P to A (# 1015), and the function data (Fb ₀ , Fb ₁ ) is changed from (0,0) to (0,1). Return (# 1015). In the above step (# 1010)
If it is determined that the A mode cannot be selected, 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). The process proceeds to step S1 to search whether the M mode is selected or not, and to search for a mode that is sequentially selectable. Then, if there is a mode that can be selected, it is set. When the A, S, and M modes are not selectable, that is, when only the P mode is selectable, the P mode is set (# 1050).

Similarly, when the A mode is currently selected as the control exposure mode (Fb ₀ , Fb ₁ = 0, 1), it is determined whether or not the S mode is selectable. Determine whether the M mode is selectable,
Change the exposure mode to the mode that can be selected, change the bits (Fb ₀ ) and (Fb ₁ ), and return (# 102-103)
0).

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 is selected. If not, the process returns to the P mode (# 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.

Down switch (Sdn) in step (# 1055)
Is ON, the same control as that of the above-described up switch (Sup) is performed, except that the direction of changing the exposure mode is different.

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

Next, control when the function change switch (S _FUN ) shown in FIG. 17 is turned on will be described. The microcomputer (μC) executes the flow after the step (# 1205) to change the data. The microcomputer (μC) is a switch that indicates the function to be changed
It is determined whether or not (S _SE ) is turned on (# 1205). If it is turned on, the function to be changed is set in bits (Fb ₉ , Fb ₉₎
b ₁₀ ) (# 1225), and proceed in the order of +/− → S / C → S / A, proceeding cyclically as returning to +/− after S / A, and performing the bit (Fb ₉ , Fb ₁₀ ) Change the data.

In step (# 1205), if the switch (S _SE ) is not turned on, the process proceeds to step (# 1265). In step (# 1265), it is determined whether or not the up switch (Sup) is turned on. If the switch is turned on, it is determined from the data (Fb ₉ , Fb ₁₀ ) what function should be changed now ( (# 1280) If the function is in the +/- mode (# 1285), 0.5 is added to the exposure correction amount (ΔEv), and the flow proceeds to a subroutine (# 1287) for determining the magnitude. This subroutine is shown in FIG. 18. If the correction amount (ΔEv) is positive, the data Fb ₄ , Fb ₅ = 0, 1 as the + side correction, and the data Fb ₄ , Fb ₅ = It is set to 1,0, and if the correction is zero, it is determined that there is no correction and the data Fb ₄ , Fb ₅ = 0,0, and returns (# 1350 to # 1370).

Returning to FIG. 17, 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 data is set so as to be opposite to the current mode. Change (#
1295), return. If neither of the above two modes (+/- mode, S / C mode), ie, S / A mode, the current mode is spot AF (S) or multipoint AF (A)
Determines whether it is the data (Fb _2), to change the data (Fb ₂₎ so that opposite current mode (# 1300), the process returns.

Up switch (Sup) in step (# 1265)
When the switch is not turned on, the process proceeds to step (# 1305), and it is determined whether the down switch (Sdn) is turned on. If not, the process returns. If turned on, +
In the case of the − / mode, the flow is the same as that when the up switch (Sup) is ON, except that 0.5 Ev is subtracted from the exposure correction amount (ΔEv), and the description is omitted (# 1310 to # 1310).
# 1340).

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

This subroutine is shown in FIGS. 22 (a) and 22 (b) and will be described. First, the microcomputer (μC) first operates the up switch (Su).
It is determined in step (# 1800) whether or not p) is turned on. If not, the process proceeds to step (# 1805) to determine whether or not the down switch (Sdn) is turned on.
If not, return. Up switch (S
When (up) is ON, the process proceeds from step (# 1800) to step (# 1810) to determine whether or not the mode is the M mode. If the mode is the M mode (Fb ₀ , Fb ₁ = 1, 0), the process proceeds to step (# 1811) to determine whether or not the aperture change switch is ON. 1830), and if not turned on, the process proceeds to step (# 1850) to change the shutter speed. First, the shutter speed change will be described. Step (# 1850)
Add 0.5Ev and go to step (# 1855). In step (# 1855), it is determined whether or not the set shutter speed exceeds the maximum speed (Tvmax). If the shutter speed has exceeded the maximum speed (Tvmax), the shutter speed is limited to the maximum speed (# 1860) and the process returns. If not, step (# 1860) is skipped and the routine returns.

If the mode is not the M mode in step (# 1810), whether the mode is the P mode in steps (# 1815) and (# 1820)
It is determined whether or not the mode is set. When a P mode (Fb _{0, 1} = 0,0) P shift determines whether or not it is prohibited (# 1817), the flow returns to where prohibited. If not, the process proceeds to step (# 1830). In step (# 1830), 0.5Ev is added to the aperture value (Av), and it is determined whether or not this exceeds the controllable maximum aperture value (Avmax) (# 1835). If it exceeds, set the maximum aperture value (Avmax) as the aperture value (Av) (# 1840). If it does not exceed it, go to step (# 1845) and check if the mode is P mode. Judge whether or not P
If it is the mode, the process proceeds to the step (# 1879) in the flowchart of FIG. 22 (b). When the mode is not the P mode, the process returns. In step (# 1815) when not in P mode _{(Fb 0, 1 ≠ 0,0)} , it is determined whether the A mode (# 1820), A mode _{(Fb 0, Fb 1 = 0,0} ) proceeds to the step (# 1830) if there is, make-up control of the aperture value (Av), neither, that is, when is the S mode (Fb _0, F
(b ₁ = 1, 1) proceeds to step (# 1823) to control the shutter speed (Tv) to increase.

If the down switch (Sdn) is ON in step (# 1805), the process proceeds to step (# 1865) of FIG. 22 (b) to determine whether the mode is the M mode. (Fb ₀ , Fb ₁ = 1, 0), it is determined whether or not the aperture change switch (S _AV ) is turned on (# 1877). If not, the process proceeds to step (# 1905) as a shutter speed change. In step (# 1905), from the set shutter speed
0.5Ev is subtracted and this is the camera's minimum shutter speed (T
vmin) (# 1907). If it is slower, the shutter speed is limited to the minimum shutter speed (# 1908). If not, the process returns without doing anything. When it is determined in step (# 1877) that the aperture change mode is set (S _AV ON), in step (# 1885), the aperture value (Av) is decreased, 0.5Ev is subtracted, and then in step (# 1890), the value is reduced. It is determined whether or not the aperture value is smaller than the open aperture value (Avo). If the aperture value is smaller, the aperture value is set to the open aperture value (Avo) (# 1895).

In step (# 1890), if the aperture value (Av) is not smaller than the open aperture value (Avo),
895) and skip to step (# 1900). If it is determined in step (# 1900) that the mode is the P mode, the control flow of increasing the aperture value in FIG.
Go to # 1860) and return if not in P mode.

In step (# 1865), if the mode is not the M mode,
In step (# 1870), it is determined whether the mode is the P mode. Here when a P-mode (Fb _{0, 1} = 0,0), to determine whether P shift is inhibited (# 1872), the flow returns to where prohibited. If not, the process proceeds to step (# 1885). Step (# 1870)
When not in the P mode in (Fb _{0, 1} ≠ 0,0), step determines whether the A mode proceeds to (# 1875), if A mode, step (# 1885) and subsequent control of the diaphragm value down If not, it is determined that the mode is the S mode, and the flow advances to step (# 1879) to control the shutter speed to decrease.

In Fig. 15, when the control of the settings of (Av) and (Tv) is completed,
It is determined whether the _normally open self-switch (S _SELF ) is turned on. When it is OFF (IP ₁₂ = "H"), it returns immediately.

The self subroutine when ON (IP ₁₂ = "L")
Referring to FIG. 19, a self-in-progress flag (SELF
If F) is set, reset it (# 9
45) Exit the self mode, and if not set, set the flag (SELF) to execute the self mode (# 950) and return respectively.

After completing the data setting control shown in FIG. 15 as described above, the microcomputer (μC) proceeds from step (# 440) to step (# 445) in FIG. Enter and create spot metering values to be used for exposure. Here, the creation of the photometric value will be described with reference to the photometric range shown in FIG. 14 and the flowchart of inputting and creating photometric data of the microcomputer (μC) shown in FIG.

In FIG. 20, first, the microcomputer (μC) determines in step (# 1600) whether or not a flag (AELF) indicating AE lock is set, and 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 the “H” level, a photometric data output command is issued to the photometric circuit (LM), and serial communication is performed (# 1605, # 1610).

This communication, and inputs the luminance values of the four metering range shown in FIG. 14 a (Bv ₁ ~Bv _4). When the communication is completed, the terminal (CSLM) is set to the “L” level (# 1615). Subsequently, in step (# 1617), the value of Bv ₂ is set in Bvc, and
1618) B _VAUE Ask for. Proceeding to (# 1622), it is determined whether or not the flag (AFNF) indicating that the camera is not in the AF mode is set. In step (# 1624), the flag (LCONF) indicating that focus detection is impossible is set. Judge whether or not
When either of them is set, the process proceeds to the step (# 1660), and the light measuring range (LM ₂ ) at the center is small.
_{Is the} spot value (B _VSP ). Flag (AFNF) and (LCON
If F) is not set, the distance is calculated from the delivery pulse, and the image magnification β is calculated from β = focal length / distance based on the calculated distance information and focal length information (# 1625), and the next step is performed. (# 1630)
It is determined whether or not the image magnification β is equal to or larger than a predetermined value (K), and the size of the subject occupying the photographing screen is determined. If the value is equal to or more than the predetermined value, the subject is determined to be large (step # 1640)
, The luminance values (Bv ₁ ), (Bv ₁ ), (Bv ₁ ), (LM ₁ ), (LM ₂ ), (LM ₃ )
The average of v ₂ ) and (Bv ₃ ) is defined as the spot metering value (Bvsp).

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, of the flags indicating the focus detection ranges, the range is determined by which flag (AF1F to AF3F) is set, and the flag (AF1F)
Is set, the brightness value of the metering range (LM ₁ )
(Bv ₁ ), the brightness value (Bv ₂ ) of the photometry range (LM ₂ ) when the flag (AF2F) is set, and when no flag is set, that is, the third island (AF ₃ ) When the defocus amount is selected, the brightness value (Bv ₃ ) of the photometry range (LM ₃ ) is set to the spot photometry value (Bvsp) (# 1645)
~ # 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.

First, in step (# 1740), the AE lock switch
It is determined whether (S _AEL ) is ON or not, and if it is not ON, the flag (AELF) is reset (# 1755). If it is ON, set the flag (AELF) (# 174
5) Reset and start the timer (T ₁ ) for holding power (# 1750), and change the spot metering value Bv ₂ to the spot value (Bvsp)
(# 1752) and return. 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 third time in step (# 455). This data communication will be described with reference to FIG. 5 (c). The microcomputer (μC) determines whether communication (III) is present or not based on a signal input from the card, and determines whether communication (III) is present. When you return. If the card is not installed, it will be blank. If there is communication (III), the terminal (CSCD) is set to “H” level (# 350),
Data is set (# 352), and the data is output to an IC card (CD) (# 355).

Next, the communication is performed once (# 357), and waits (# 360).
After the data output subroutine (# 362) is executed and the data output is completed, the terminal (CSCD) is set to the "L" level (# 365) and the routine returns.

This data output subroutine will be described with reference to FIG. 5 (g). First, it is determined whether or not a group has been designated based on the data exchanged during communication (II) (# 362-1). If a group designated (sports cards, snap cards, etc.), performs control to output a group of data of the group designated _{G 0, G 1, G 2} , G 3 on the card. First, set the address of the group G ₀ (# 362-2), carried out 15 times serial communication (# 362-3).

The data of G ₀ , G ₁ , G ₂ , G ₃ are data for lens driving and AE calculation, And then communicates whether the data of the group G ₁ is required (I
The determination is made based on the data obtained in I) (# 362-4). Returns if not needed. If it is necessary to set the address G ₁ of the data in G ₁ (# 362-5), three times the serial communication (# 362-6). Next, it is determined whether the data is needed G _2, if necessary to set the address G _2, performs serial communication twice. Then it is determined whether the required data G _3, if necessary to set the address G _3, and then returns performed once serial communication. If the group is not designated, the address is set based on the address containing the necessary data input from the card (# 362-7), and the serial communication is performed for the number of times of the serial communication input from the card (# 362-8). Note that there is no address designation type in communication (III).

When the above-mentioned card data communication (III) is completed in FIG. 6, the microcomputer (.mu.C) proceeds to step (# 460) and performs exposure calculation.

FIG. 23 to FIG. 27 show the flow of this control. In FIG. 23, the microcomputer (μC) first sets the light emission signal, which is output data to the electronic flash device, to 1, forced ON = 0, forced OF
Initialize F = 0, GN control release = 0 (# 2000- # 200
3). Next, in step (# 2004), it is determined from the input lens data whether or not a lens is attached. If not attached, the photometric value (Bv _AM ) (Bv _AM ) of the photometric range (LM ₄ ) is determined similarly to the actual aperture metering. Instead of this, the entire photometric value may be used), film sensitivity (Sv) and exposure compensation value (ΔEv)
To calculate the shutter speed and return (# 20
05). If a lens is attached, it is determined whether or not the camera is in the forced P mode based on data input from the card (# 200).
6) In the case of the forced P mode, the routine returns without performing the exposure calculation. If the mode is not the forced mode, 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. 24 (a) to 24 (c).
First, in step (# 2100) of FIG. 24 (a), the microcomputer (μC) determines the backlight state with the photometric value (Bv _AM ) of the photometric range (LM ₄ ) and the step (# 445). 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 2Ev or more, the electronic flash device is mounted (the switch S _{M of the} electronic flash device is set to O
Whether N) determined in step (# 2105), mounted it is, in the photometric value of the exposure values of the control (Ev) of the metering range (LM ₄₎ (Bv _AM) Ev from such = Bv _AM + Avo + Sv- 1 + ΔEv (# 2115). Here, the reason why 1 is subtracted is that the background is over 1 Ev to make the background look like backlight. 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 the subroutine (# 2120) of the program I for determining the aperture value (Av) and the shutter speed (Tv), and sets the forced ON in step (# 2170) and returns. The program I is shown in FIG. 24 (b) and explained. When the control value (Tvc) of the shutter speed is tuned to Tv = 7 (S
S = 1/125) and the aperture value (Av) is 7 from the exposure value (Ev).
(Shutter speed) is obtained by subtracting this aperture value (Av)
Is larger than 7 (F = 11), and if it is larger, the control aperture value (Avc) is limited to 7 and the process returns (# 2215). If the aperture value (Av) is 7 or less, it is determined whether the calculated aperture value (Av) is smaller than the open aperture value (Avo). If the aperture value is smaller, the open aperture value (Avo) is set to the control aperture value (A).
vc) (# 2225), and if not smaller, the calculated value (Av) is set as the control aperture value (Avc) (# 2230). Then, it is set to 1 to release the GN restriction of the electronic flash device (# 2235), and at the same time, a light emission signal is set (# 2240), and the process returns. This is because the aperture of the subject is reduced by the aperture and the GN is limited, so that the main subject may not be appropriate with strobe light, so if the camera is in P mode, the photographer may not have much intention. Take into account.

Returning to FIG. 24 (a), in step (# 2105)
When the electronic flash device (FL) is not mounted, the control exposure value (Ev) is obtained from the spot value (Bvsp) or the like of the photometry range by Ev = Bvsp + Avo + Sv + ΔEv (# 2130) to obtain the proper exposure of the main subject. Value (Av), shutter speed (Tv)
The program proceeds to the subroutine (# 2135) of the program II for obtaining the following, and returns through the step (# 2170).

FIG. 24 (c) shows and explains this subroutine.
First, in step (# 2250), the aperture value (Av) is set to Av = 5 / 8Ev-2.
Determined from 5/8, it is determined whether or not this aperture value (Av) is larger than the maximum aperture value (Avmax) of the lens (# 2255). If it is larger, the maximum aperture value (Avmax) is set to the control aperture value (Avc ) (# 2260), and proceeds to step (# 2280). In step (# 2255), the aperture value (Av) is set to the maximum aperture value (Avma
x) When it is less than or equal, it is determined whether or not the aperture value (Av) is smaller than the open aperture value (Avo).
o) is set as the control aperture value (Avc), and if not small, the calculated aperture value (Av) is set as the control aperture value (Avc), step (# 2280)
Proceed to (# 2265 to # 2275).

In the step (# 2280), the shutter speed (Tv) is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). In the next step (# 2285), whether the speed is higher than the maximum shutter speed (Tvmax) is determined. It is determined whether or not the control shutter speed (Tvc) is limited to (Tvmax) if it is higher (# 2290), and if not, step (# 2292).
To determine whether it is slower than the lowest shutter speed (Tvmin). If it is slower, use (Tvmin) as the control shutter speed (# 2293). If not, use the calculated shutter speed (Tv) as the control shutter speed. (Tvc) and (# 229
5) The light emission signal is reset (= 0) to inhibit light emission (# 2298), and the process returns.

Returning to FIG. 24 (a), in step (# 2100)
When the difference between B _VAM -Bvsp is less than 2, the process proceeds to step (# 2145) as a non-backlight state, the average photometry value of the photometric range _{(LM 1) ~ (LM 4} ) (Bv 1 + Bv 2 + Bv 3 + Bv 4) / The exposure value (Ev) is obtained from 4 and the aperture value (Av) and the shutter speed (Tv) are determined by the above-mentioned program II (# 2150), and the shutter speed (Tv) is set to the speed of camera shake warning (Tv = 6.1). / 60) is determined (# 2155). When the speed is lower than the camera shake warning speed, it is determined whether or not the electronic flash device is mounted (# 2160). If the electronic flash device is mounted, the program I for strobe light emission is executed (# 2165) and the process returns. .

If it is not mounted (including turning off the power of the flash device), the forcible ON is set in step (# 2170) and the routine returns. If less than the camera shake warning, return without doing anything.

Next, a flowchart for determining the aperture value (Av) and the shutter speed (Tv) in the A mode will be described with reference to FIG. 25. First, it is determined whether or not the electronic flash device is mounted. Control shutter speed (Tv
c) is set to 7 (1/125), and the set aperture value (Av) is returned as the control aperture value (Avc) (# 2300, # 2305 and # 234)
Five). If it is not attached, the exposure value (Ev) is obtained from the average photometric value, and the value obtained by subtracting the set aperture value from the exposure value (Ev) is used as the shutter speed (Tv) (# 2315, # 232)
0). Then, in the next step (# 2325), the maximum shutter speed (Tvma) at which the shutter speed (Tv) can be controlled.
x) It is determined whether it is greater than or not. If it is, the maximum shutter speed (Tvmax) is set to the control shutter speed (Tvc) in step (# 2330), and the process proceeds to step (# 2345). If not, the lowest controllable speed (Tvmi
It is determined in step (# 2331) whether or not the speed is lower than n). If the speed is lower than (Tvmi) in step (# 2333)
n) is the control shutter speed (Tvc), and if not lower than (Tvmin), the calculated value (Tv) is determined in step (# 2335).
Is the control shutter speed (Tvc), and the process proceeds to step (# 2345). In step (# 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. 26. First, in step (# 2400), the exposure value (Ev) is obtained from the average photometric value and the like, and it is determined whether or not the electronic flash device is mounted. If it is determined in (# 2405) that the camera is mounted, it is determined in step (# 2415) whether or not the shutter speed (Tv) is 7 or less, and if it is 7 or less, the set shutter speed (Tv) is controlled. Set the shutter speed (Tvc) (# 242
0), when exceeding 7, the tuning speed 7 is set as the control shutter speed (Tvc), and the process proceeds to step (# 2430).

In step (# 2430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the obtained exposure value (Ev), and whether or not 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 routine 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 it is not mounted, the set shutter speed (Tv) is set as the control shutter speed (Tvc) (# 2460), and the process proceeds to step (# 2430) to execute the subsequent flow.

Next, in the M mode (see FIG. 27), the preset aperture value (Av) is set to the control aperture value (Avc) in step (# 2515), and the shutter speed (A25) is set in the next step (# 2520). Tv) is returned as the control shutter speed (Tvc).

Returning to FIG. 6, when the exposure calculation (# 460) is completed, the microcomputer (μC) of the camera determines whether there is a signal requesting extension of the time required from the card to communication (IV) (# 461). ), Wait for 10msec in some cases (# 463), do nothing if there is no request signal, each IC card (CD)
The fourth data communication is performed (# 465). This request signal is sent because the calculation time becomes longer in the case of a defocusing card. FIG. 5 (d) shows a flowchart of this control. To begin with, it is determined whether or not communication (IV) is necessary based on the signal obtained in communication (II). If needed,
The terminal (CSCD) is set to “H” level (# 367), and serial communication with the IC card (CD) is performed (# 375).
Notify that the C card is the output side. Here, after waiting for time (# 377), serial communication is performed with the camera as the input side, and data is input from an IC card (CD) (# 38).
2) When this data communication is completed, the terminal (CSCD) changes to “L”.
Return to level.

The data input subroutine in the above step (# 382) is described with reference to FIG. 5 (h). First, in step (# 382-1), it is determined whether or not a group is designated.
If the group is not specified, the register address for data input in communication (IV) is set to the address input from the card (# 382-11), and serial communication is performed the number of times input from the card (# 382-12). And return.

If a group is specified, according to the number of each communication (G ₀ , G ₁ , G ₂ ). The address of the input register in the camera is set, and a predetermined number of serial communications are performed. The contents of the data are as follows for the address designation type: (i) for a custom card.

(Ii) Bracket card, H / S card Returning to FIG. 6, when the data communication (IV) with the card is completed, the microcomputer (μC) outputs data to the electronic flash device (ST) (# 467). This is shown in FIG. 11 (b). The microcomputer (μC) first determines whether or not the card function is ON based on the data input from the card (# 467).
-1) If not ON, proceed to step (# 467-10). O
If N, the forced ON, forced OFF, GN restriction release, and light emission are performed in steps (# 467-2), (# 467-4), and (# 467-4) based on the control signal of the electronic flash device input from the card.
6) If it is determined in (# 467-8) and the control signals indicate forced ON, forced OFF, GN restriction release, and no light emission, respectively, those are determined in steps (# 467-3) and (# 467-5). ), (# 467-
7) and (# 467-9), and when the above four are not shown respectively, (# 467-3 ') and (# 467-
5 '), (# 467-7') and (# 467-9 ') reset the signals respectively and proceed to step (# 467-10). Step (# 467-10), the terminal (CSFL) a predetermined time (T ₂₎
It is set to the “H” level to indicate that the electronic flash device is in the data output mode from the camera. The camera uses the input / output switching circuit (I / OCG) as the output side ("H") and waits for a predetermined process in the electronic flash device to perform serial communication once (# 467-11 to # 467-11). 467-13).

When the data communication with the electronic flash device is completed in FIG. 6, the microcomputer (μC) executes the flow of the card control in step (# 470). This flow shows the determination as to whether or not to control the camera using an IC card (in this case, a program card) based on the input data, and the operation of the camera when performing the control.
Referring to FIG. 28, the microcomputer (μC) first determines in step (# 2610) whether or not the camera is controlled by the card based on the data input from the IC card. If the camera is not controlled by the card (CDFNF = 0) returns.

If it is determined that the camera is controlled by an IC card, it is determined whether the data input in communication (IV) is the aperture (Av) shutter speed (Tv), and the (Av) (Tv) data , The control aperture value (Avc), the control shutter speed (Tvc), and the film sensitivity (Sv) are determined based on the data input from the IC card (# 2615 to # 263).
0).

If the above data is not (Av) or (Tv) data, (Δ
Av) and (ΔTv) are determined (# 26).
35). If the data is not (ΔAv) or (ΔTv), the process returns. (ΔAv), (ΔTv) data,
(ΔAv) is added to the control aperture value (Avc), (ΔTv) is added to the control shutter speed (Tvc), and the film sensitivity (S
v) plus (ΔSv) and return (# 2640 to # 265)
0).

In FIG. 6, when the above-described routine for controlling and controlling the camera by the IC card (# 470) is completed,
Move on to display control (# 471).

Table 5 shows the contents of data sent from the microcomputer (μC) to the display control circuit, which will be described.

Shutter speed: Here, shutter speed data or card name data is stored using one byte.

Aperture ............ aperture or numerical data (setting data at the time of the card) is memory, b ₀ is blinking its data.

AE mode ............ b _0, b ₁ is currently set P, A, S, M
One of the modes, but, b ₄ ~b ₆ is 8 kinds of data of the setting of the mode by the IC card is inputted.
b _2, b ₃ flashing data b ₄ ~b _6, lighting, control is performed in the dark.

Number or numbers (setting when the card data) of the film sheets ............ film data is memory, b ₀ is turned of this data, a control data off.

Is data for displaying indicia and Vero indicia Patokan Bello display ...... Patokan, b ₀ is turned on, a control data indicating off.

Card display ......... b _1, b ₂ (address DP _6H) are lit for each display of exposure correction +/-, off the data, b _5,
b ₆ (address DP _6H ) is for selecting single / continuous shooting and controlling turning off the display. b ₀ , b ₁ (address DP _7H ) is control data for blinking, turning on / off the display of the card, b ₄ , b ₅ (address DP _7H )
Indicates control for switching display and extinguishing of multipoint AF / spot AF, respectively.

Data change display: i indicating the data change and lighting
This shows the control of turning off the light.

Control data …… Data that indicates the sequence of the camera. B ₀ … All off (main switch OFF) b ₁ … Standby (main switch ON, S ₁ OFF) b ₂ … Card display b ₃ … Initial load b ₄ … S ₁ ON b ₅ ... rewind in LED in viewfinder ... b ₀ ... Yes of presence / absence b ₃ ... multipoint AF of focus display Yes / No b ₂ ... tracking mode / Not b ₁ ... focus undetectable / None b ₄ ... Indicates AF / M respectively.

A flowchart of the display microcomputer for controlling the display is shown in FIG. 29 (b) and will be described. Display control circuit (DISP
When a signal that changes from “L” to “H” from the camera microcomputer (μC) terminal (CSDISP) is input to C), an interrupt shown in FIG. 29 (b) is executed, and the display data from the camera (No. (See Table 5) and input by performing serial communication for 11 bytes (# D-5). It is determined from the input control data whether or not the mode is the all-off mode (# D-10). If the mode is the all-off mode (DP _9H , b ₀ = 1), it is set to the all-off mode in which nothing is displayed (#D). -15). When not in all-off mode (DP _9H , b ₀ =
0), and determines whether or not the mode is the standby mode (# D-
20) In standby mode (DP _9H , b ₁ = 1)
Display based on display of the AE mode currently set to b _0, b ₁ of _{DP 3H (# D-25)} . The position of the cursor (Δ) is displayed based on the data of the card display based on the information of DP _6H and DP _7H , and the data change display of DP _8H , and is turned off otherwise. One example is shown in FIG. 29 (c). FIG. 29 (c) shows the display of the P mode, the presence of the card function, the Δ mark (cursor) at the position of the exposure compensation, the absence of the exposure compensation function, the single shooting mode, and the multipoint AF.

When the standby mode is not set in the step (# D-20), it is determined whether or not an initial load is performed (# D-20).
-45). When initial load (DP _9H , b ₃ =
1), the display of the number of film frames (DP _5H), displays only Patokan-Perot display, otherwise turned off (# D-50~ # D
-60). FIG. 29 (d) shows that the film is loaded and the initial load is performed. During rewinding (DP _9H ,
b ₅ = 1), the “−−” indication in FIG. 29 (d) indicates the number of films being rewound at that time.

When rewinding is not in progress, it is determined whether or not a card is displayed (# D-70). When the card is displayed (DP _9H , b ₂ = 1), DP
_The card name is displayed by decoding the data of _1H , the numerical value is displayed based on the data of DP _2H , and the selected (selected) by the IC card is displayed using b _{2 to} b ₆ of DP _3H , the numerical values displayed on the basis of the data of the DP _4H, and DP _7H of b _0,
b controls the display of the card based on ₁ (# _D-75~ #
D-95). The display of this card will be described later in detail.
If it is determined in step (# D-70) that the mode is not the card display mode, the process proceeds to step (# D-105) and the switch (S ₁ ) is set
It is determined whether or not N is set. When the switch is ON, the display in the infinder is performed based on the infinder information (# D-110). When the switch is not ON, the display in the infinder is not performed. Step (# D-11
Proceed to 5).

Thereafter, the shutter speed (SS) displayed based on the information of the DP _IH, aperture value based on the information of the DP _2H, b ₀ of the DP _2H,
b Display of AE mode based on ₁ , Display of number of films based on DP _3H , Potokan display based on DP _4H , Card related display based on DP _6H and _7H information, Data based on DP _8H information Display of change (Δ) Display AF mode and self based on b ₆ and b ₇ of DP _9H and b ₀ of DP _10H (# D-115
~ # D-155). FIG. 29 (a) shows a flowchart of display control (display data creation) on the camera side as an example. First, in step (# 2700), it is determined whether or not card display control is to be performed. Judgment based on the data obtained in communication (II), and in the case of card display control, set the mode to output the information input from the card as it is,
Perform serial communication 12 times (# 2705-2730). On the other hand, when the card display control is not performed, data generated by the camera [shutter speed aperture value, number of films, etc .-- FIG. 29 (e)
(See # 2710), serial communication is performed 12 times (# 2720). Next, in step (# 2735), it is determined whether or not the card has the authority to control the buzzer based on the data input from the card. If the card has the control right, a camera shake warning signal from the card is issued. It is determined whether or not there is (# 2740). In the case of a camera shake warning, regardless of whether or not a buzzer warning is issued with a custom card,
A buzzer warning is issued (# 2745), and the process proceeds to step (# 2765). If it is not a camera shake warning, the process proceeds to step (# 2765) without issuing a buzzer warning. If the card does not have the buzzer control right, it is determined whether or not the shutter speed determined by the camera is less than 6 (# 2750). If not, the process proceeds to step (# 2765). If less than 6, the card function is ON
Is determined on the basis of the data entered in by communicating whether (II), if not turned ON, determines whether the buzzer alerts the data of E ² PROM in the camera (# 2754), a buzzer when there A warning is issued. If there is no warning, no buzzer warning is issued, and the process proceeds to step (# 2765).

If the card function is ON, it is determined whether or not the card is a custom card (# 2758). If the card function is not a custom card, the process proceeds to camera control to perform the above-described control. If it is a custom card, communication (IV) entered from the card
It is determined whether or not there is a buzzer based on the data (# 27).
60) If there is, give a buzzer warning (# 2756) and proceed to step (# 2765), otherwise go to step (# 2765) without issuing a buzzer warning. In step (# 2765), determines whether there is a signal of the write control to the E ² PROM from custom card, write data from a custom card for communication (IV) when there is it (# 2770) , Proceed to step (# 2775). When there is no write control signal, step (# 2770) is skipped and the process proceeds to step (# 2775).

Step (# 2775) is a subroutine for setting a mode.

Here, the mode setting subroutine will be described with reference to FIG. 29 (f). In this case, it is determined whether or not the mode currently set in the camera is the newly set mode. In this case, the mode is shifted to another set 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. 29 (f), the microcomputer (μ
C) are to determine first settable exposure mode is changed E ²
The data in the PROM is compared with the data input from the IC card (CD) to determine (# 3203).
If there is a change), the data (Fb ₀ , Fb ₁ ) is set to (0,0) to force the exposure mode to the P mode (# 320
5), return.

When the display control (# 471) described above with reference to FIG. 6 is completed, the microcomputer (μC) proceeds to step (# 472) to determine whether or not self-timekeeping is being performed. 1) It is determined whether 10 seconds have elapsed (# 47)
Four). If it has elapsed, the process proceeds to step (# 490) to perform exposure control. If 10 seconds have not elapsed, the process returns to step (# 180). When not self-timed (SLP =
0) proceeds to step (# 473) to determine whether or not the release switch (S ₂ ) is ON; if not (IP ₇ = “H”), step (# 520) Proceed to to enable all interrupts and return. When ON (IP
₇ = “L”), it is determined whether or not the release prohibition data obtained in the communication (II) is set (# 475), and if it is set, the process proceeds to step (# 520). On the other hand, if it is not set, it is determined whether or not the self mode is selected (# 476). If it is not selected (SELFF = 0), the flow proceeds to step (# 481).

When selected (SELFF = 1), the self-timer flag (SLP) is set (# 477), and the timekeeping timer (apart from holding the power supply) is reset-started (# 47).
8). Then, in order to hold the power, the flag (OPF) is set (# 479), the AE lock flag (AELF) is set (# 480), the measured value is fixed, and the process proceeds to step (# 180).

Step of FIG. 6 when not self mode (# 475), the (IP ₁₂ = "H") step proceeds to (# 481), (manual focus adjustment of the focus lock or focus detection only) manual focus mode [MFF = 1 Is determined, and if the mode is the manual focus mode, the flow proceeds to step (# 490). If the mode is not the manual focus mode, the process proceeds to step (# 485). Step (# 4
In step 85), it is determined whether or not a flag indicating the focus (AFEF) is set.
Return through 520). If it is set, step (# 49)
Proceed to step (0) to disable all interrupts, and then proceed to step (# 49
Communication (V) with the card is performed in 2). This is shown in FIG. 5 (e) and described.

First, the microcomputer (μC) determines the presence / absence of communication (V), returns if there is no communication (V), and returns to the terminal (CSC
D) is set to "H" level (# 390), data indicating communication (V) is set (# 391), and the camera side is output (# 392), and serial communication is performed once (##). 39
3). Next, data is set, and serial exchange is performed once using the camera as an output. After waiting for time (# 394), the camera side is input (# 385), serial exchange is performed eight times (# 396), and the terminal (CSCD) is set to the "L" level (# 39).
7), return. This data is data for the memory of the memory card.

Here, the data contents are shown and explained in the CACD table. (I) Number of films (ii) Open F _NO (iii) Control F value (iv) Control shutter speed (v) Exposure compensation value (vi) Exposure mode (vii) Exposure Mode (viii) Film sensitivity. When the communication (V) is completed, the microcomputer (μC) proceeds to step (# 495) to perform exposure control (described later), and then, in step (# 500), winds one frame of the film (also described later). Yes), release switch (S ₂ )
Is determined to be ON in step (# 505), and if ON is determined (I
P ₇ = “L”), it is determined whether or not a signal for forced continuous shooting from the card is input. If the input has been made, the process proceeds to step (# 515). If the input has not been made, it is determined in step (# 510) whether or not the continuous shooting mode is set. If the continuous shooting mode is set (Fb ₃ = 1) ), All interrupts are permitted in step (# 515), and the routine proceeds to [SO]. When the continuous shooting mode is not set (Fb ₃ = 0), the process returns to step (# 505), waits for the release switch (S ₂ ) to be turned off, and when it is turned off, all interrupts are permitted in step (# 520) and return. I do.

Next, the exposure control subroutine of the above step (# 495) will be described with reference to FIG. First step (# 28
At 05), the terminal (CSST) is set to the “H” level for (t ₃ ) to indicate to the electronic flash device (ST) that the exposure mode is set. And
The film sensitivity (Sv) is D / A converted as analog data to a light control circuit (STC) and then output (# 2810).

In the next step (# 2815), aperture control is performed based on the control aperture value (Avc), and mirror up is started.
Next, the lens is driven during the release. This will be described with reference to FIG. 30 (b). First, it is determined whether or not the card function is ON (# 2822-0). If the card function is ON, the snap drive bit input from the IC card and indicating the lens drive during release is indicated. It is determined in step (# 2822-1) whether or not there is a signal. If there is no signal indicating that the card function is OFF or the snap drive is performed, the process proceeds to step (# 2822-4) and waits until the mirror-up is completed. When mirror up is completed (IP ₂₀ =
"L") Return. If there is the above signal, it is driven by the lens driving amount (Δn) inputted from the card (# 28).
22-3) Stop the lens (# 2822-4), and wait for the mirror up to be completed (# 2822-5). When the mirror up is completed (IP ₂₀ = “L”), the process returns.

Next, returning to FIG. 30A, the shutter speed is controlled (# 2825), [control of lens driving RELII] during release is performed (# 2830), and the process returns. This will be described with reference to FIG. 30 (c). First, it is determined whether or not the card function is ON (# 2830-0). If it is ON, it is determined whether or not there is a signal of the snap drive bit (# 2830-1), and if there is, it is driven by the opposite amount (-Δn) (# 2830-2) to stop the lens. (# 2822-
4) Return. If there is no signal of the above bit, it is determined whether or not a defocusing card is inserted (# 2830-5). If it is not a defocusing card, return. If the card is a defocusing card, the count pulse number (CNT) at the current position of the driven lens
Is set to CT "(# 2830-6), the difference ([Delta] n) from the lens position (CT ') before driving is calculated (# 2830-7), and the process proceeds to the step (# 2830-2). And returns.

The routine of the Tv control in the step (# 2825) in FIG. 30 (a) is described with reference to FIG. 30 (d). First, the microcomputer (μC) changes Tv to the exposure time (T) (# 283).
5) The timer for measuring the exposure time is reset and started (# 2836), and the running of one act (not shown) is started (# 2836).
2837). Then, it is determined whether or not the card function is ON (# 28
38) If OFF, the flow moves to the flow (# 2846) to wait for the exposure time (T) to elapse. On the other hand, if it is ON, it is determined whether or not it is a defocusing card (# 2839). If the card is a defocusing card, the current pulse position of the lens
Stored as CT '(# 2840), exposure time (T) is T /
4 is performed (# 2841). At T / 4, the drive direction is detected to be far side or near side from the information of (ΔLp) input from the card (# 2842), the direction is set accordingly, and the lens is driven at the highest speed (##). 2845). At this time, the counter for monitoring the lens extension position is still operating. At this time or when the card is not a defocusing card, the exposure time (T) is set (# 2846),
When the time reaches T, the second act (not shown) starts running (# 2847),
Wait for the time when the running is completed (# 2848), stop the motor for driving the lens (# 2849), and return.

FIGS. 31 (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,
In FIG. 7A, the microcomputer (μC) outputs a motor hoist signal to the motor control circuit (MD) and resets and starts the timer (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 been pulled. The microcomputer (μC) determines in step (# 2860) whether or not the switch ( _SWD ) indicating that one frame has been wound has been turned on. If not, the microcomputer determines whether or not 2 seconds have elapsed in this state. If it is determined in (# 2865) that 2 seconds have elapsed, the motor is controlled to stop (# 2870), and assuming that the film is tight, this film tight control is performed (# 2870).
2875) Next, the cancel signal for canceling the bracketing or the auto shift which is the continuous shooting is set to 1 (#
2876), perform data communication I (# 2877) and return. Referring to FIG. 31 (b) to explain the tension subroutine, a signal for reversing the motor is output (# 29).
At the same time, wait for the film detection switch (S _FLM ) to be turned off (# 2935). If the switch is turned off, perform motor stop control (# 2955) to wind the film into the patrone room. And return.

Returning to FIG. 31 (a), in step (# 2860)
When the single-frame winding completion switch ( _SWD ON) is turned on, the motor is controlled to stop in step (# 2880), and then, in step (# 2890), the counter number (N ₁ ) is incremented by 1 and the process proceeds to step (# 2900). In step (# 2900), the number of films (N ₁ ) is written into the E ² PROM.

Next, when the back cover closing 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. [INT ₂ ]
Execute the interrupt of In the flow shown in the figure, the microcomputer (μC) first prohibits interruption to this flow (# 30).
00) Then, in step (# 3005), the rewind switch (S
_RW ) is detected. If it is ON, the [rewind] routine shown in FIG. 31 (b) is executed to perform the rewind operation, the interrupt is permitted, and the routine returns (# 3010). When the rewind switch (S _RW ) is not turned on, it is assumed that the back cover closing switch (S _RD ) is turned on, and a cancel signal (use data for communication I) is returned as a bracket function or an automatic shift function return. The value is set to 0 (# 3012) and the process proceeds to step (# 3015) to determine whether or not 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, when the 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. And the terminal (CSDX) to the “L” level (# 3020 to # 3030). Then, the number (N ₁ ) is set to −2 (# 3035), and then the terminal (CSDISP) is set to the “H” level to perform serial communication with the display control circuit (# 3045), and a signal indicating initial load (# 3045) DP _9H b ₃ = 1) and the data of the number of films are output.
Do not display any data other than ₁ ). When the serial communication is completed, the terminal (CSDISP) is set to the “L” level (# 3050). The display of the numerical value of the number of films (N ₁ ) is displayed using two 7 segments. Next, the microcomputer (μC) outputs a signal indicating motor winding to the winding control circuit (# 3055) and waits for one frame to be wound (# 3025).
3060) When the one-frame winding switch (S _WD ) is turned on, 1 is added to the number of films (N ₁ ) to judge whether or not the number has become 1. If it is not 1, the process proceeds to step (# 3040). Back. If it is 1, the flow proceeds to step (# 3075) to stop the motor, and proceeds to step (# 3095). And
In step (# 3095), the number of films (N ₁ ) and the film sensitivity are written into predetermined addresses of the E ² PROM, and after the writing is completed, all interrupts are permitted (# 3100) and the process returns.

Here, in this embodiment, it is added that the setting and resetting of the flag and the bits 1 and 0 are the same.

In the above, the microcomputer (μ
Various flowcharts have been described mainly with respect to the operation C). Next, control operations of the IC card mounted on the camera will be described with reference to flowcharts. The description will be given for each type of card. The IC card (CD) incorporates a microcomputer (μC ₂ ) with a built-in E ² PROM.

 First, the operation of the custom card will be described.

(1) Custom card The microcomputer (μC ₂ ) of the custom card executes the reset routine shown in Fig. 33 when the IC card is inserted into the camera, resets all flags and registers (RAM), and resets the E ² PRO.
The information in the M sleeps transferred to _{RAM (EECSTM 0, 1) (} C-5, C-10).

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the card, the card executes the interrupt shown in FIG. Here, the card performs serial communication once in synchronization with a clock sent from the camera to input data indicating the type of communication (C-15).

From the data from this communication, the type is determined (C-
20) If the communication is (I), the card is set to the data input side (C-25), and serial communication is performed (C-30) to receive data (see CACD) from the camera. Based on this data, a data setting subroutine is executed (C-35), and sleep is performed.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using a custom card table.

In communication (II): ・ Does the card control display? CS II-1-b ₄・ Card function ON / OFF CS II-1-b ₅・ No communication (V) (= 0) CS II-2-b _2-release prohibition _{CS II-2-b 3 ·} AF prohibiting _{CS II-2-b 7 ·} E 2 P write _{CS II-3-b 2 ·} Tv · Av display data (= 0) CS II-3 -b 3 • Communication (IV) available (= 1) CS II-3-b ₄ • Communication (III) not available (= 0) CS II-3-b ₅ • Communication type CS II-3-b ₆ • Photometry loop repetition CS II -3-b ₇ · custom cards (= 1) CS II-3 -b is all but ₅ of the signal is "0", from the table ※ mark is set to "1" or "0" depending on the time, When "1", the control is ON, and when "0", the control is OFF. "0" and "1" are determined for fixed items. In communication (II),
Otherwise the communication (IV) directly address type of traffic data Number of (2 times), the address (CSII-7, 8), since the communication in the group communication (III) is not CSII-9- (b _1, b
₂ ) = 0,0, Communication (IV) is display only, so CSII-10-b ₁
= 1, otherwise "0".

In the above table, any data may be entered where nothing is written.

In communication (IV), the data of the function that can be changed
Is in.

In communication (VI), a sleep enable / disable signal is sent.

Next, the data setting subroutine will be described with reference to FIG. 35 (a). First, steps (C-146) to (C-149) will be described.
To set the display control data to “0” and prohibit release prohibition (=
0), prohibition of AF prohibition (= 0), prohibition of photometry loop repetition (= 0), and then step (C-15)
At 0), it is determined whether the write signal of the E ² PROM in the communication (II) is 1, and if it is “1”, it is assumed that the write data has already been output to the camera last time, and this is set to “0” (C− Fifteen
5) Go to step (C-160). If "0", the process proceeds to step (C-160) without doing anything. Next, communication (I)
DISREQ (request to display card name) signal obtained in step 1
Is determined in step (C-160), and "1" is determined.
, The display control data is set to “1”, the card display function ON / OFF is turned ON (1), E ² P writing is not performed (0),
Set the data of the group designation to (0) (C-170 to C-1)
95). Subsequently, it is determined whether or not the flag (SIF) is set (C-200). If the flag (SIF) is not set, it is assumed that the flow passes for the first time, and the flag (SIF) is set (C-205). The timer is reset and started (C-210), and the process proceeds to step (C-215). When the flag (SIF) is set, the process jumps directly to step (C-215). In step (C-215), it is determined whether the timer has elapsed for 10 seconds. Ten
If the second has not elapsed, the photometry loop repetition signal is set to "1" (C-220), a card display name and data for performing only card display are set (C-222), and the process returns. This display is shown in FIG. On the other hand, if 10 seconds have elapsed, the flag (SIF) is reset, the display control data is set to "0" (C-226, C-227), and the process returns.

If DISREQ = 0 in step (C-160), the process proceeds to step (C-162), where IP ₅ = “L” (that is, the switches S _EM , S _FUN , S _CD , S _CDS , S ₁ ) It is determined whether or not any of them is ON, and when "L", the display flag (display F) indicating the control for displaying the card name is reset (C-16).
3) If not "L", proceed to step (C-165) without doing anything. After resetting the flag (SIF) in step (C-165), the flow advances to step (C-260) in FIG. 35 (b) to determine whether the self signal obtained in communication (II) is "1". Is determined.

If the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). When the self signal is not "1", the card setting switch (S _CDS )
Is turned on (C-265). When it is ON (signal = 1), it is determined in step (C-270) whether or not a flag (S _CDS IF) indicating that the signal has passed is set. Proceed to step (C-276), and if not set,
Set this and go from step (C-275) to step (C-276)
Proceed to. In this step (C-276), it is determined whether or not the setting is being performed. If the setting is not being performed, the process jumps to step (C-405) to perform the display control in the setting mode. If the setting is being performed (SETF = 1), the operation has been performed to exit from the set, and the display returns without performing the display control.

If the switch is OFF in step (C-265), the flow advances to step (C-280) to determine whether or not the flag (S _CDS IF) is set. Proceed to). If the flag is set, it is reset (C-285), and it is determined in step (C-285) whether a flag (SETF) indicating that data is being set is set.
290), and if it is set, it is reset (C-295), and the E ² PROM write signal (write signal to the E ² PROM in the camera and the card) is set to 1 (C-30).
0), direct address designation = 1 and step (C-310)
Proceed to. Thus it exits during setting, to write the data from the card to the E ² PROM in the camera to the camera. If the flag (SETF) indicating that the setting is in progress has not been set, the flag is set (C-305) to enter the data setting mode, and the flow proceeds to step (C-310). In step (C-310),
During setting (SETF = 1), the card switch (S _CD ) is set to O
It is determined from the data of communication (II) whether or not N is performed (C-315). If it is turned on (S _CD = 1), a flag (S _CD IF) indicating that it has passed is set. It is determined whether or not it is present (C-320), and if it is set, the process proceeds to step (C-345). If it is not set, this is set in step (C-325) (S _CD IF = 1), and the change mode is changed from 1 → 2 → 3 → 1 in the next step (C-330).
... and proceed to step (C-310).

Here, the change mode 1 is for selecting the combination of the AE modes 2 is for selecting the AF mode 3 is for the presence / absence of the camera shake warning buzzer. In the above step (C-315), the card switch
If (S _CD ) is not turned on (S _CD = 0), step (C
-335) flag (S _CD IF) it is determined whether or not has been set, to step (C-345) as If it is not set nothing is operated, the switch when it is set ( Assuming that S _CD ) has changed from ON to OFF, this flag is reset in step (C-340), and the flow advances to step (C-345). In step (C-345), it is determined whether or not the up switch (S _up ) is ON. If it is ON (Sup = 1), it is determined whether the mode is 1 (C-350). When the mode is 1, the process proceeds as 1 → 2... 7 → 8, and after the mode 8, the process returns to 1 and proceeds (C-355). Here, in mode 1, 1 is PASM 2, PSM 3, PAS 4, PAM 5, PA 6, PS 7, and PM 8 are P. When the mode is 2, the process proceeds from 1 to 2 to 3, and after the mode 3, the process returns to 1 and proceeds (C-365).

Here, 1 is focus lock, 2 is continuous AF, and 3 is spot AF. When the mode is not 2, that is, when the mode is 3, 12
(C-370).

In this case, 1 is a buzzer warning buzzer and 2 is no buzzer warning buzzer. When the change in each mode is completed, the process proceeds to step (C-405). When the up switch (S _up ) is OFF, it is determined whether or not the down switch (S _dn ) is ON (C-375), and when it is not ON, step (C-40)
Proceed to 5). When the switch is ON, the switch (S _up ) and the direction of the change are only reversed, and the description is omitted.

When the processing of (S _up ) and (S _dn ) is completed, step (C-40)
5) Then, the display control = 1, release prohibition = 1, AF prohibition = 1, group designation = 0, photometry loop repetition = 1, set display data during data setting, and return.
The display during this setting will be described later. As a result, the camera executes the function of continuing display regardless of the display control by the card, release prohibition, AF prohibition, and the power holding timer of the camera.

In the above step (C-310), the setting is not in progress (SETF =
0), the step (C-43) in FIG.
Proceeds to 0), and determines whether the card switch (S _CD) is turned ON, and resets the flag (S _CD F) in step when the card switch (S _CD) is OFF (C-460), It is determined whether or not the display flag (display F) is set (C
-462), return if not set. When it is set, the step (C-17) in FIG.
Proceeding to 0), the display of the card name is controlled. In the above step (C-430), when the card switch (S _CD ) is ON, it is determined whether or not a flag (S _CD F) indicating that the card has passed through is set (C-435). If the switch has been operated, it is determined that the switch has been operated (step C-462).
Proceed to. When the flag (S _CD F) is not set, then set this (C-440), card function in the next step (C-445) it is determined whether the currently ON, is ON In this case, set OFF (communication II data) (C-450)
The display flag (display F) is reset (C-451) and the routine returns. Conversely, if it is OFF, go to step (C-455).
Turn ON (communication II data) and step (C-45)
In step 6), set the display flag (display F) in step (C).
Proceed to -170) to perform display control of the card name.

Returning to FIG. 34, if it is not communication (I) in step (C-20), it is determined in step (C-40) whether communication is (II), and if it is communication (II), the above setting is made. The card side is set as the output side to output data to the camera, and serial communication is performed 10 times to sleep (C-45, C-50).

If it is not communication (II), it is determined in step (C-55) whether or not it is communication (IV). If it is communication (IV),
The card is set as the output side (C-60), and it is determined in step (C-65) whether or not a group is designated. If the group is designated, display data is outputted (C-70), and the address is set and the serial number is set. Communication is performed 9 times (C-75), and the flow advances to step (C-90). When the group is not specified (direct address specification), the address of the function change data (EECSTM) is specified (C-80), and serial communication is performed twice (C-80).
-85), and proceed to step (C-90). Step (C-9
In (0), it is determined whether or not the E ² PROM write signal is set. When the E ² PROM write signal is set, a write control signal is output to write the 2-byte data of EECTSM to a predetermined address of the E ² PROM (C -95). Writing to the E ² PROM is performed by hardware, and the microcomputer (μC) only needs to send a control signal. And a write end signal (this signal is automatically set by the hardware configuration when writing is completed)
And reset (C-100) to sleep. Sleeps immediately when there is no write signal. Step (C-55)
If it is not communication (IV), it is determined that communication is (VI), and it is first determined whether or not writing has been completed with the end signal.
When the operation is completed, the sleep enable signal is set (C-
110), if not completed, set a sleep disable signal (C-115), and proceed to step (C-120), respectively. As the data output side (C-120), perform serial communication according to the clock from the camera. (C-125) to sleep.

 FIG. 34 shows the display contents at the time of setting.

When the card set key is pressed in the normal display mode (A), the custom card “CuSt” is displayed as shown in (B).
"-1""1" is displayed at all the exposure modes AMSP and the number of films, and the card mark blinks.
If the card setting key is turned off in this state, the exposure mode combination setting starts. As shown in (C) to (J), from the above display, the exposure mode blinks the selected mode, and blinks the numerical value at the number of films. By turning on the up / down key, the direction shown in the figure is displayed. The change in the combination of the exposure modes and the change in the value of the number of films change.

Further, when the card key is turned ON, to indicate the mode by the switch (S _Q) as shown in (K) ~ (M) "CuSt
-2 ". By turning on the up / down key, the numerical value of the number of films changes as indicated by 1231. Next, when the card key is turned on, "CuSt" is displayed as shown in (N) and (O).
The numerical value of the number of films changes to 12 by turning on "-3" and the up / down key. Go to exposure mode setting with next card key ON. When the card set key is pressed in this state, a normal display is displayed.

 Next, the operation of the data memory card will be described.

(2) Data memory card When this card is inserted into the camera, the reset routine shown in FIG. 38 is executed, all flags and registers (RAM) are reset (D-5), and the card goes to sleep.

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the card, the card executes an interrupt shown in FIG. Here, the card performs serial communication once to input data indicating the type of communication in synchronization with the clock sent from the camera (D-10).

From the data from this communication, the type is determined (D-
15) In the case of communication (I), the card is used as the data input side, serial communication is performed, and data (see CACD) is received from the camera (D-20, D-25). Based on this data, a subroutine of display control is executed in step (D-30) and sleep is performed.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using a data memory card table.

In communication (II): ・ Is the card performing display control? CS II-1-b ₄・ Card function ON / OFF CS II-1-b ₅・ Communication (V) available (= 1) CS II-2-b _2. Release prohibited CS II-2-b ₃ · AF prohibited CS II-2-b ₇ · Tv · Av / display data (= 0) CS II-b ₃ · Communication (IV) CS II-b ₄ · Communication ( III) No (= 0) CS II-b 5 · group specified, communication type (= 0) CS II-b 6 · photometric loop repeat CS II-b ₇ signal other than all set to "0", mark ※ from the table Sets "1" or "0" according to the time, and turns the control ON when "1" and OFF when "0". "0" and "1" are determined for fixed items. In communication (II),
Since there is no other group communication (III), C
_{SII-9- (b 1, b} 2) = 0,0, communication (IV) is so displayed that _{only, CSII-10-b 1 =} 1, otherwise set to "0".

Where there is nothing in the table, any data may be entered.

In communication (VI), a sleep enable / disable signal is sent.

In communication (V), data for memory is sent from the camera.

The data setting subroutine is described with reference to FIG. 40. First, in steps (D-150) to (D-155), the display control data is set to "0", release inhibition is inhibited (= 0), and AF inhibition is inhibited (= Initially set to 0), DISR obtained in communication (I)
It is determined in step (D-160) whether or not the signal of the EQ (request for displaying the card name) is "1". If the signal is "1", the display control data is set to "1" and the card is displayed. (D-170). Next, in step (D-200), the flag (SI
It is determined whether or not F) is set. If not, it is assumed that the flow passes for the first time, this flag is set (D-205), and the timer is set to step (D-2).
A reset is started in step 10), and the flow advances to step (D-215). When the flag (SIF) is set, the process proceeds to step (D-215). In this step (D-215), it is determined whether or not the timer has passed 10 seconds. Ten
If the second has not elapsed, the photometry loop repetition signal is set to "1" (D-220), and a card display name and data for performing only card display are set (D-222), and the process returns. This display is shown in FIG. 41 (b). On the other hand, 10
If the second has elapsed, the flag (SIF) is reset, the display control data is set to "0", and the routine returns.

When the DISREQ = 0 in step (D-160), the program proceeds to step _{(D-162), IP 5} = "L" (i.e., the switch
( _SEM , S _FUN , S _CD , S _CDS , S ₁ is ON) and resets the display flag (display F) indicating the control to display the card name when it is "L". (D-163)
If it is not "L", do nothing and do step (D-
Proceed to 165). In this step (D-165), the flag (SI
After resetting (F), step (D-2) in FIG.
Proceed to 60) and the self signal obtained in communication (II) is "1"
It is determined whether or not. If the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). When the self signal is not "1", it is determined whether or not the card setting switch (S _CDS ) is turned on (D
-265). When the signal is ON (signal = 1), it is determined in step (D-270) whether or not the flag (S _CDS IF) indicating that the signal has passed is set. Proceed to step (D-276), and if not set, set (D-275) and proceed to step (D-276). And this step (D-2)
At 76), the change mode is set to 1 (described later), and further, at step (D)
In step (-277), the number of sheets is initially set to 1 (described later), and the flow advances to step (D-405) to perform display control in the setting mode.

If the switch is OFF in step (D-265), the flow advances to step (D-280) to determine whether or not the flag (S _CDS IF) is set. Proceed to 310). If it is set, it is reset (D-285), it is determined whether or not a flag (SETF) indicating that data is being set is set (D-290). If it is set, it is reset. (D-295) Proceed to step (D-310).

If the flag (SETF) indicating that the setting is in progress is not set, the flag is set (D-305) to enter the data setting mode, and the flow proceeds to step (D-310). Step (D-3
In step 10), if the setting is being made (SETF = 1), it is determined from the data of communication (II) in step (D-315) whether or not the card switch (S _CD ) is turned on, and the card switch (S _CD ) is turned on. Case (S
_(CD = 1) It is determined whether or not the flag (S _CD IF) indicating that the signal has passed through is set (D-320). If the flag is set, the process proceeds to step (D-345). If not set, this is set in step (D-325) (S _CD IF = 1), and in the next step (D-330), the change mode is advanced by 1 → 2 → 3 → 1. , Step (D-31)
Go to 0).

Here, change mode 1 is: display of shutter speed, aperture value, mode display, number of films, flashing of card mark 2 is display of film sensitivity, exposure compensation value, number of films, flashing of card 3 is: focal length of interchangeable lens, Opening of interchangeable lens F _NO ,
Indicates the number of films and flashing of the card mark.

If the card switch is not turned on (S _CD = 0),
It is determined whether or not the flag (S _CD IF) is set (D
-335), if it is not set, it is determined that nothing has been operated, and directly goes to step (D-345). If it is set, it is determined that the switch (S _CD ) has been turned from ON to OFF, and this flag is set. Is reset in step (D-340), and then the process proceeds to step (D-345). Step (D-345)
Then, it is determined whether or not the up switch (S _up ) is turned on. If the up switch (S _up ) is turned on (S _up = 1), the step (D
-355) and the number of films at that time is 1 → 2 ... 35 → 36 →
1 is incremented by one. After the change of the number of films is completed, the process proceeds to step (D-405).

In the judgment of step (D-345), the up switch (S _up )
If it is OFF, the process proceeds to step (D-375), and it is determined whether or not the down switch (S _dn ) is ON. When the down switch (S _dn ) is ON, the change direction is the same as that when the up switch (S _up ) is ON, and the description is omitted.

When the processing of the up switch (S _up ) and the down switch (S _dn ) is completed, the process proceeds to step (D-405) and the subsequent steps, and the display control = 1, release prohibition = 1, AF prohibition = 1, photometry loop repetition = 1 , And display data is set, and the routine returns. At this time, the display data is set according to the change modes 1, 2, 3 and the number of films. The display will be described later. The camera executes the function of continuing display regardless of the display control by the data card, the release prohibition, the AF prohibition, and the power holding timer of the camera.

In the above step (D-310), the setting is not in progress (SETF =
0), the step (D-43) in FIG.
Proceeds to 0), and determines whether the card switch (S _CD) is turned ON, the card switch (S _CD) is returned when the OFF.

When the card switch (S _CD) is ON, it sets the display flag (display F) (D-433), the process proceeds to step (D-170) of Figure 40, and displays the card name.

This data memory card ignores the ON / OFF of the card function (data is stored when the card is installed), and instead displays the card name when the card switch (S _CD ) is operated Like that.

Returning to FIG. 39, if it is not communication (I), it is determined whether or not it is communication (II) (D-35). If it is communication (II), the card is set to output the set data to the camera. Set to the output side (D-40), perform serial communication 10 times (D-4
5) Go to sleep.

If it is not communication (II), proceed to step (D-50) to determine whether it is communication (IV). If it is communication (IV), set the card to the output side (D-85) and display data. Is output (D-90), an address is set, serial communication is performed 9 times (D-95), and sleep is performed.

If it is not communication (IV), it is determined whether it is communication (V) or not (D-55). If it is communication (V), the data is set to the input side (D-60), and serial communication is performed (D-65). ), Input the data for the memory from the camera. Then, the start address of the E ² PROM to be stored is determined by the inputted number of films (N−1) × 8 bytes (input bytes of SIO), and the E ² PROM is determined.
Then, a write control signal is output to write the memory data input to (D-75). Writing to the E ² PROM is performed by hardware, and the microcomputer (μC) only needs to send a control signal. Then, in step (D-80), the writing end signal is reset (this signal is automatically set by the hardware configuration when writing is completed) and sleeps. If the communication is not the communication (V), it is determined that the communication is the communication (VI). First, it is determined whether or not the writing is completed by the end signal (D-100). Is set, and if not completed, step (D)
In step (D-115), the sleep disable signal is set, and the flow advances to step (D-115) to perform serial communication according to the clock from the camera as the data output side (D-12).
0) Go to sleep.

 FIG. 41 (a) shows the display contents at the time of setting.

When the card set key is pressed in the normal display mode (A), the shutter speed of the first frame is changed as shown in (B).
Aperture value, AE mode, "1" is displayed at the film number to indicate the first frame, and the card mark blinks.

As shown in (C) and (D), up / down key ON
As a result, the value of the number of films goes up (36) or goes down (2) in the direction shown in the figure, and the shutter speed, aperture value, and AE mode for the number of films are sequentially displayed.

Further, when the card key is turned on, 400 (film sensitivity) and +0.5 (exposure compensation value) are displayed as shown in (E), and the film sensitivity and exposure when the number of films is increased by operating the up / down key. The correction value is displayed.

Next, when the card key is turned on, the focal length and the open F value corresponding to the number of films are set to L105 (focal length), 4 in (F).
(Open F value) is displayed, and when the up / down key is turned on, the value of the number of films changes, and the focal length and the open F value according to the number of films are displayed.

Then, the operation returns to (B) by the next card key ON operation. When the card set key is pressed in this state, a normal display is displayed.

 Next, the operation of the sports card will be described.

(3) Sports Card When the sports card is inserted into the camera, the reset routine shown in FIG. 42 is executed, all flags and registers (RAM) are reset, and the apparatus goes to sleep (S-5).

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the sports card, the sports card executes an interrupt shown in FIG. Here, the sports card performs serial communication once to input data indicating the type of communication in synchronization with a clock sent from the camera (S-15).

From the data from this communication, the type is determined (S-
20) If it is communication (I), the card is set to the data input side (S-25), and serial communication is performed (S-30) to receive data (see CACD table) from the camera. A data setting subroutine is executed based on this data (S-35).
Go to sleep.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using a sports card table.

In communication (II): • Auxiliary light prohibited (= 1) CS II-1-b ₀ • FL forced OFF (= 1) CS II-1-b ₂ • GN restriction released (= 1) CS II-1-b _3. Whether or not the card controls the display CS II-1-b _4. ON / OFF of the card function CS II-1-b _{5. With} / without hand buzzer CS II-1-b _7. P-shift prohibited ( = 1) CS II-2-b ₀ · Forced P mode (= 1) CS II-2-b ₁ · No Vth communication (= 0) CS II-2-b ₂ · AF continuous (= 1) CS II-2-b ₅ • Forced AF (= 1) CS II-3-b ₁ • Tv / Av / Display data CS II-3-b ₃ • IV communication Yes (= 1) CS II-3-b _4. III communication Yes (= 1) CS II-3-b _5. Group designation (= 0) CS II-3-b ₆ Photometry loop repetition CS II-3-b ₇ Hand shake buzzer control (= 1) CS II-4-b except signals all ₀ is "0", from the table ※ mark is set to "1" or "0" in response to that time, "1 The control ON time of, and OFF when it is "0". "0" and "1" are determined for fixed items. In communication (II),
CSII to designate group 1 of communication (III)
-9-b ₁ = 1, communication (IV) is two of display control data
CSII−10−b ₁ , b ₂ = 1, 1, otherwise set to “0”.

Where there is nothing written, any data may be included.

In communication (VI), a sleep enable signal is sent. This is because there is no write control to the E ² PROM.

FIG. 44 (a) shows the data setting subroutine. In step (S-150), the display control data is initially set to "0", and in the next step (S-160), the display control data is obtained by communication (I). It is determined whether the signal of DISREQ (request for displaying the card name) is "1", and if it is "1", the display control data is set to "1" and the card display function ON / OFF is turned on.
(1) (S-170 to S-185). Next, in step (S-200), it is determined whether or not the flag (SIF) is set. If the flag is not set, it is determined that the flow will pass for the first time, and the flag is set (S-205).
The timer is reset and started (S-210), and the process proceeds to step (S-215). Even when the flag (SIF) is set, the process proceeds to step (S-215). In step (S-215), it is determined whether or not the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, the photometry loop repetition signal is set to "1" (S-220), and a card display name and data for performing only card display are set (S-222).
To return. This display is shown in FIG. On the other hand, when 10 seconds have elapsed, the photometry loop repetition signal is set to "0" (S-225), and the flag (SIF) is reset (S-22).
6) The display control data is set to "0" (S-227) and the process returns.

When DISREQ = 0 in step _{(S-160), IP 5} =
It is determined whether or not "L" ( _SEM , S _FUN , S _CD , S _CDS , S ₁ is ON) (S-162). When "L", the card name is displayed. The display flag (display F) shown is reset (S-163). If the flag is not "L", the process proceeds to step (S-165) without doing anything, and the flag (SIF) is reset. Thereafter, the step (S-26) in FIG.
Proceed to 0) and the self signal obtained in communication (II) is "1"
It is determined whether or not.

If the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). Not equal self signal is "1", the flow proceeds to step 44 Figure (c) (S-430) , determine whether the card switch (S _CD) is turned ON, the card switch (S _CD) is when OFF to reset the flag _{(S CD F) (S-} 460), followed by display flag (display F) it is determined whether or not has been set (S-465), the process returns when not set .
If set, go to step (S-170),
Controls the display of card names. In step (S-430) whether the flag indicating that through which when the card switch (S _CD) is ON (S _CD F) is set determined in step (S-435), is set If so, it is determined that the switch is being operated, and the process proceeds to step (S-465). If it is not set, set it (S-44
0), it is determined in the next step (S-445) whether or not the card function is currently turned on.
(S-450) is returned as (communication II data). O
In the case of FF, this is turned ON (communication II data), and the flow advances to step (S-170) to control the display of the card name.

Referring back to FIG. 43, when the communication is not the communication (I), it is determined whether the communication is the communication (II) (S-40). When the communication is the communication (II), the card is set to output the set data to the camera. On the output side, perform serial communication 10 times (S-50) and sleep.

If it is not communication (II), it is determined whether it is communication (III) or not (S-51). If it is communication (III), the card side is input (S-52) and serial communication is performed 15 times. T (S
-53) Enter the camera data and proceed to the next step (S-5)
In 4), calculate data (including exposure calculation) for controlling the camera and sleep. This calculation will be described later.
If it is not communication (III), it is determined whether it is communication (IV) or not (S-55). If it is communication (IV), the card is set to the output side (S-60) and it is determined whether or not display control is performed. (S-6
5) In the case of display control, display data is output (S-70), an address is set, and serial communication is performed.
(S-75) to sleep. When the display control is not performed (Tv, Av data), the address of the data of Tv, Av is designated, serial communication is performed four times (S-85), and the sleep is performed.

If the communication is not the communication (IV), the communication is determined to be the communication (VI). First, the card is set as the output side, the serial communication is performed according to the clock from the camera (S-125), and the sleep is performed.

Next, referring to FIG. 45, step (S-54) of FIG.
The AE (exposure) calculation will be described.

A shutter speed reference value _TVH is calculated to sound a camera shake warning buzzer.

Since prone to camera shake at a shutter speed faster longer lens focal length, to increase the T _VH when the focal length becomes longer.

zFz = 16 × log ₂ f / 50 + 56 (f: focal length of lens (mm)) T _VH = 1.25 × ( _z F _z −56) /16+5.875 For example, f = 105mm T _VH ≒ 7.2 (SS ≒ 143) f = 210mm T _VH ≒ 8.5 (SS ≒ 353) In the same way as above, _calculate T _VH . This is to warn if Tv becomes extremely slow even with a wide-angle lens.

zFz = 16 × log ₂ f / 50 + 56 (f: focal length of lens (mm)) T _VH = 1.125 × ( _z F _z −56) /16+5.875 For example, f = 35mm T _VH ≒ 5.3 (SS ≒ 37) F and = short 2.8 lens focal length f of the ring is camera shake warning buzzer Bz is also extremely slow shutter, limits the T _VH to when f is long conversely not sounded when the shutter speed is faster than a certain extent buzzer Bz is .

Calculates the shutter speed at the turning point of the AE calculation diagram.

When the focal length f is less than 50 mm, there is little possibility of camera shake, so the aperture is set to a slightly narrower line.

When f ≧ 50 mm, when the subject is close and large, a moving subject is assumed, and the line is changed according to the image magnification in order to make the line to increase the shutter speed.

And when the image magnification data cannot be used (communication (III)
AEFLAG of input data at the time b ₁ = 0), T of the bending point
_vf is uniformly set to T _vf = 0. When usable (b ₁ = 1), β> 1/50 T _vf = 11 1/100 ≦ β> 1/50 T _vf = 10 β> 1/100 T _vf = 9.

When the spot key is ON (AEL = 1) may, if the spot brightness (BVc) ... exposure value EVs from luminance BV ₂ ..., also the spot key is OFF (AEL = 0) luminance (BVs ) Exposure value EVs is calculated from main subject luminance.

And the maximum (AVmax) and minimum (AVmin or A
V ₀ ), maximum shutter speed (TVmax), minimum shutter speed (TVmin)
EVs obtained from above are equal to the control limit (AVmax + TVmax
r AVo + TVmin), set the above limit value,
Proceed to shake determination.

At the above limit value, the shutter speed when AV = AVo is set as TV = EVs−AVo, TVc = TV, AVc = AVo, and the process proceeds to the camera shake determination, but if it is below the turning point (TV _F ) of the program diagram. When this TV exceeds the bending point (TV _F ), the inclination of the AE calculation is changed according to the focal length of the lens.

If the focal length is long, use a line that increases the shutter speed to prevent camera shake.

If the focal length is short, the aperture should be narrowed down to make the line a little narrower in consideration of depiction.

FIG. 46 shows the above-mentioned program line written for three lenses of f = 38 mm F = 2.8 f = 105 mm F = 4.5 f = 210 mm F = 4. Here, the three lines of f = 105 mm and f = 210 mm satisfy β <1/100, 1/50 <β <1/100, and β ≦ 1/50 in order from the top.

When the aperture value AV thus obtained exceeds AVmax, the shutter speed TVc = EVs-AVmax as AVc-AVmax.
And When the calculated aperture value AV does not exceed AVmax, TV = E
It is determined whether or not the TV obtained by Vs−AV exceeds TVmax. If the TV does not exceed TVmax, AVc = AV, TVc = TV. I will ask again.

When camera shake, to perform a camera shake warning, the set signal (SII-1-b ₇₎ to one communication (II), when not shake, sets this signal (SII-1-b ₇₎ to zero.

Then, the bit (b ₀ ) of the communication (IV) signal CTRLB is set to 0, and flash light emission is inhibited.

 Next, the operation of the auto depth card will be described.

The auto depth card is a card for focusing on the main subject and the background. The main subject is placed in front of the depth of field, and the background is focused on as much as possible.

(4) Auto depth card When the auto depth card is mounted on the camera, the auto depth card executes the reset routine shown in FIG.
M) are all reset (O-5), and sleep.

Next, when a signal that changes from "L" to "H" is sent from the camera to the terminal (CSCD) of the auto depth card, the auto depth card executes the interrupt shown in FIG. Here, the auto depth card performs serial communication once to input data indicating the type of communication in synchronization with a clock sent from the camera (O-15). From the data obtained by this communication, the type is determined (O-20). If the communication is (I), the card is set to the data input side (O-25), and serial communication is performed (O-30). (See CACD table). Based on this data, a data setting subroutine is executed (O-35), and sleep is performed.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using an auto depth card table.

In communication (II): ・ FL forced ON CS II-1-b ₁・ GN restriction released (= 1) CS II-1-b ₃・ Whether or not the card performs display control CS II-1-b ₄・Card function ON / OFF CS II-1-b ₅ , snap drive bit CS II-1-b ₆ , camera shake buzzer ON / OFF CS II-1-b ₇ , P shift prohibited (= 1) CS II-2-b ₀ · Forced P mode (= 1) CS II-2-b ₁ · No Vth communication (= 0) CS II-2-b ₂ · AF one shot (= 1) CS II-2-b ₆ · Forced AF (= 1) CS II-3-b ₁ · Tv · Av / Display data CS II-3-b ₃ · Communication (IV) Yes (= 1) CS II-3-b ₄ · Communication (III) Yes (= 1) CS II-3-b ₅ · Group designation (= 0) CS II-3-b ₆ · Photometry loop repetition CS II-3-b ₇ · Camera shake buzzer control (= 1) CS II-4-b ₀ The AF one-shot here refers to prohibiting the tracking mode after focusing on the camera side. The following mode is input to prohibit the following mode (this is called a forced one-shot on the camera side).

All signals other than the above are set to “0”, and the asterisks in the table set “1” or “0” according to the time, and when “1”, the control is ON, and when “0”, the control is OFF. "0" and "1" are determined for fixed items. Communication (II)
Then, in order to designate the groups G ₀ and G ₁ of the communication (III) in the communication (IV), CSII-9- (b
₀ , b ₁ ) = 1, 1, communication (IV) is three of display control data and lens drive data, so CSII−10−b ₁ , b ₂ , b ₃ = 1, 1, 1,
Otherwise, it is set to “0”.

Where there is nothing written, any data may be included.

 In communication (VI), a sleep enable signal is sent.

The data setting subroutine is described with reference to FIG. 50 (a). First, in step (O-150), display control data is initialized to "0", and in the next step (O-160), communication (I) is performed. It is determined whether or not the signal of the obtained DISREQ (request for displaying the card name) is “1”. If the signal is “1”, the display control data is set to “1” and the card display function ON / OFF is turned on.
(1), to (O-170, O-175). Next, in step (O-200), it is determined whether or not the flag (SIF) is set. If not, it is assumed that the flow is passed for the first time and the flag (SIF) is set (O-20).
5) The timer is reset and started (O-210), and the process proceeds to step (O-215). When the flag (SIF) is set, the process also proceeds to step (O-215). In step (O-215), it is determined whether the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, the photometry loop repetition signal is set to "1", a card display name and data for performing only card display are set (O-222), and the routine returns. This display is shown in FIG. On the other hand, if 10 seconds have elapsed, the photometry loop repetition signal is set to "0", the flag (SIF) is reset (O-226), the display control data is set to "0" (O-227), and the process returns. In step (O-160)
When DISREQ = 0, IP ₅ = “L” (that is, switch S _EM ,
It is determined whether or not any _one of S _FUN , S _CD , S _CDS , and S ₁ is ON) (O-162), and a display flag (display F) indicating control for performing card name display when "L" is set. Reset (O-16
3) If not "L", do nothing and go to step (O-16)
Proceed to 5) to reset the flag (SIF). Thereafter, the flow advances to step (O-260) in FIG. 50 (b) to determine whether or not the self signal obtained in communication (II) is "1".

When the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). If the self signal is not "1", the step (O-
Proceeds to 430), and determines whether the card switch (S _CD) is turned ON, when the card switch (S _CD) is OFF, reset the flag _{(S CD F) (O-} 460), followed by To determine whether the display flag (display F) is set (O-
465) If not set, return. If it is set, the flow advances to step (O-170) to control display of the card name.

When the card switch (S _CD) is ON in step (O-430), whether or not the flag (S _CD F) is set indicating that through which is determined in the step (O-435), set If so, it is determined that the switch is kept being operated, and the process proceeds to step (O-465). If not set, reset this (O-440) and the card function
It is determined in the next step (O-445) whether or not N has been performed. If it has been turned on, the process returns as OFF (communication (II) data) (O-450) and returns. If it is OFF,
Set this to ON (communication (II) data), and
Proceed to -170) to perform display control of the card name.

Returning to FIG. 49, if it is not communication (I), it is determined whether or not it is communication (II) (O-40). If it is communication (II), a card for outputting the set data to the camera is set. Is the output side, serial communication is performed 10 times (O-50),
Go to sleep.

If it is not communication (II), it is determined whether it is communication (III) or not (O-51). If it is communication (III), the card side is input (O-52) and serial communication is performed 18 times (O
-53), and input the camera data to the next step (O-
In 54), calculate the data for controlling the camera (including the exposure calculation) and sleep. This calculation will be described later.

If it is not communication (III), it is determined whether it is communication (IV) or not (O-55). If it is communication (IV), the card is set to the output side (O-60) and whether or not display control is performed. Judge (O
-65) In the case of display control, it is assumed that display data is output (O-70), an address is set, serial communication is performed nine times (O-75), and a sleep is performed. If not the display control (T _v, A _v data), T _v, the address of data A _v, perform serial communication 5 times (O-85), sleeps. If the communication is not the communication (IV), it is determined that the communication is the communication (VI). First, the serial communication is performed according to the clock from the camera using the data card as the output side (O-12).
5), sleep.

Next, FIGS. 51 (a) and (b) show an auto depth card.
A flowchart for performing an AE (exposure) calculation is shown and briefly described.

First, it is determined whether or not the camera is in focus based on whether the bit (b ₀ ) of the FLGO input in communication (II) is “1”. If it is not in focus (b ₁ = 0), the depth aperture (AVDEP) is set to the smallest F-number (A _vo ) with the smallest depth. This is because this card focuses on both the subject position and the background, and this information cannot be obtained unless the subject position, that is, the subject is in focus. For this reason, considering the maximum F-number that indicates the shallowest value as the depth, if the subject is placed in front of this depth (on the camera side), the subject will not be focused at any aperture value. Because they fit. When the lens is in focus (b ₀ = 1), (Α and δ are constants related to depth). This F value is an aperture value for covering the depth from the ∞ position at a position that is half the current feeding amount (Lp) from the ∞ position.

 This is the apex value AVDEP ().

In the step, an aperture value for satisfying the depth from the current lens position to the ∞ position is calculated.

 The lens shift value is calculated based on this value.

Lp is 0 at infinity and increases as the distance decreases. At infinity, F = 0 is set because there is no need to shift the lens because the depth of field is considerable. As the subject gets closer, the F-number increases because the lens must be moved greatly to capture the background. Obtained AVDEP is, the maximum aperture value (A _vmax) or more when in the open aperture value of the lens (A _vo) Hereinafter, the limit value to the A _vo or A _vmax.

In the step, a reference value (T _vf ) of the shutter speed is calculated to sound a buzzer for a camera shake warning. (T _vf ) Since a camera with a longer focal length is more likely to cause camera shake.
(See FIG. 53).

If the shutter speed becomes faster than a certain level (TVF>
8) TVF = 8 to prevent the buzzer from sounding
And

When the flash switch is not ON, when the spot key is ON (AEL = 1), the exposure value E _vs, also spot key is OFF from the spot brightness (BV _c) (BV ₂ of luminance) When (AEL = 0), brightness (BV _s ) ...
The exposure value control value Evs is calculated from the main subject luminance.

And the maximum (AV _max ) and minimum (AV _mim or
A _vo ), maximum shutter speed (TV _max ), minimum (T
V _mim ), the Evs obtained above is the control limit (AV _max + TV _max)
Is larger than or less than AV _o + TV _min ), the above-mentioned limit value is set, and the process proceeds to camera shake determination. When the value is within the above limit range, the shutter speed when AV = Avo is set to a camera shake (T
If V _F ) or less, TV = Evs−Avo, TVc = TV, AVc = AVo, and proceed to camera shake determination. When the TV exceeds camera shake (TV _F ), E _vs > A _VOZ + T _vf At the time, priority is given to the absence of camera shake, and a line is used to narrow the aperture in order to increase the depth of field (# 0). When EDS ≦ AVDEP + TVf, the control aperture value AVc ← AV and the control shutter speed TVc ← TV. E _vs
When> A _VDEP + T _vf , the effect is the same even if the aperture is reduced by more than this (AVDEP), so make a diagram to increase AV and TV at the same rate (see Fig. 54).

When the obtained AV exceeds the maximum aperture value (AVmax), the control AVc is set to AVmax, and the control TVc is set to EVs-AVmax. When the calculated AV does not exceed the maximum aperture value (AVmax), this is set as control AVc, and calculated by TV = EVs−AV, it is determined whether or not this exceeds TVmax. AV
c is obtained again by AVc = EVs−TVmax. If the calculation TV does not exceed TVmax, the calculation TV is set as the control TVc.

When (i.e. determined when the shutter speed TVc is less than TV _H were) of, in order to perform the camera shake warning, signal communication (II) (S II
−1−b ₇ ) is set to “1”, and when there is no camera shake, this signal (SII-1-b ₇ ) is set to “0”.

Then, the bit (b ₀ ) of the communication (IV) signal CTRLB is set to 0.
Flash light emission prohibition is performed.

When the flash switch is ON, the aperture value (AVD) at that time is Ask for.

Below this point, the main subject (EVs) has a low brightness judgment level (T
(VF + AV _oz + ΔEV), and the flash control is performed when it is less than VF + AV _oz + ΔEV). ΔEV is ΔEV = -0.25 when there is no previous calculated value, and when there is a previous calculated value. By doing so, it is easy to emit light at the time of the previous light emission. At the last non-light emission, the light is hard to emit, and if the condition is non-light emission, the process proceeds to 0-13 to control the flash non-emission.

 Next, the flash control will be described.

When the spot key is ON (AEL = 1), it is determined whether or not the previous spot key ON calculation was performed. When the previous spot key calculation was performed, the previous control aperture value (AVc ) using a control shutter speed (TVc) and proceeds to the flash light calculation (F ₁ ~F _3). If the spot key is not ON, or if the calculation of the spot key ON has not been performed last time, the exposure value (EVA) is calculated from the background luminance (BVA) (F-4).

This exposure value (EVA) depends on the tuning speed (TVX) and the open F value (AV
_oz ) +1.5 or less and the main subject exposure value (EVs) is equal to or less than the tuning speed and the open F-number-1.0, it is determined that both the background and the main subject are dark. And the spot key is ON
The control aperture value (AVc) is set to AVD when the switch is not turned on, the main subject is appropriately exposed to the flash light, and the depth of field is saved to some extent. Then, the control shutter speed (TVc) is set as the tuning tuning speed, and the process proceeds to the light control calculation.

The background exposure value (EVA) is EVA> TVx + AVoz + 1.5 or
When the main object exposure value (EVS) is EVS> TVx + AVoz-1 or spot key is ON, ΔBV (BV _A -BVs) is determined or 2.5 or more, EVA exposure control value as a backlight state when 2.5 or more
It is set to -1.5, the background is over, and it seems to be backlit, and the main subject is properly exposed with flash light. When the value is less than 2.5, it is determined that the subject is not in a backlight state, the background is set to one step lower, and the background and the main subject are appropriately exposed with natural light and background light. (F-9) It is determined whether or not the shutter speed at the open F-number (AVoz) is equal to or higher than the tuning speed. If the shutter speed is higher than the tuning speed, the control shutter speed (TVc) is set to the tuning speed (TVx). The value (AV) is obtained from EVc-AVx, and it is determined whether or not the aperture value (AV) is equal to or larger than AVD. When the aperture value (AV) is equal to or larger than AVD, the control aperture value (AVc) is set to AVD, whereby the main subject is underexposed. Is preventing.

When AV <AVD, the control aperture value (AVc) is set to AV. Then, the flash dimming level is calculated. In F-12
When TV <TVx, release the control aperture value (AVc) to the open F value (AVoz)
It is determined whether or not the TV is equal to or greater than the minimum shutter speed (TVmin). If the TV shutter speed is equal to or greater than the minimum shutter speed (TVc), the control shutter speed (TVc) is set to TV.
The process proceeds to the flash dimming level calculation as n.

This dimming level calculation is shown in FIG. 51 (c) and explained. The exposure value (EVc) is obtained from AVc + TVc, and it is determined whether or not EVc−EVs (exposure value of the main subject)> 0. EVc−EVs ≦ 0
At this time, the correction amount is set to χ = 1.5, the light emission amount (control light amount) is set to under, and the main subject is not over, and the process proceeds to m-7.

When EVc−EVs> 0, it is determined whether or not EVc−EVs> 3, and when EVc−EVs> 3, the correction amount χ = 0 and m−7
Proceed to. When EVc−EVs ≦ 3, χ = 1/2 (EVs−EVc +
Go to m-7 as 3). Determines whether the image magnification (β) can be used, and when it can be used, β ≧ 1/7 → TTL = χ 1/7> β → TTL = χ + 0.5 1/10> β ≧ 1/40 → TTL = χ + 0. 875 1/40> β → TTL = χ + 1.25, and when the object occupying the screen becomes small (β is small), the amount of reflected light returning from the object decreases, and the dimming completion signal is delayed, and the light is emitted. Since the amount is large, overexposure occurs. In order to correct this, the light emission amount is reduced as β decreases.

When β cannot be used, it is assumed that there are many subjects of 1/10> β ≧ 1/40, and TTL = χ + 0.875. And the control light intensity (SV
c) Add TTL to film speed SV. After completing the dimming level calculation, set the flash emission signal,
The camera shake Bz is turned off. Then, the control aperture value (AVc)> AV
It is determined whether or not it is DEP, and when AVc> AVDEP, AVF (aperture value for obtaining a focus shift amount) is set as AVDEP. As a result, the background (up to ∞) and the main subject are focused.

When AVc ≦ AVDEP, AVF = AVc, the main subject is at the forefront of the depth (closer to the camera), and the background is at least as far as possible within the depth. Then, it is determined whether or not the subject is in focus. When the subject is not in focus, the focus shift amount (ΔLP) = 0. When in-focus, the AVF is converted to F in a table, and the focus shift amount (ΔLP) is calculated by ΔLP = F × KEL × α × δ. This is illustrated in FIG. 55 and will be described briefly.

In FIG. 55, crosses indicate lens positions (subject positions). The depth when AVc is greater than or equal to the AVDEP depth is smaller and closer than the AVDEP depth. At this time, the lens drive control is performed so that the main subject is located ahead of the depth. The dotted line is out of focus (≠ AV
DEP). Next, the depth when AVc exceeds AVDEP becomes closer and wider as a whole. At this time, lens control is performed at a position determined by AVDEP. In this case, focus is achieved up to the position ∞.

 Next, the operation of the bracket card will be described.

Here, the bracket card is a card used to change the exposure by a certain amount to an over-side and an under-side to perform photographing.

(5) Bracket card When the bracket card is inserted into the camera, the bracket card executes a reset routine shown in FIG.
M) are all reset (B-5), the information in the E ² PROM, the number of sheets (N) and the shift amount (ΔE _v ) are transferred to the RAM, and sleep is performed (B-10).

Next, when a signal which changes from "L" to "H" is sent from the camera to the terminal (CSCD) of the bracket card, the bracket card executes an interrupt shown in FIG. Here, the bracket card performs serial communication once to input data indicating the type of communication in synchronization with the clock sent from the camera (B-15).

From the data from this communication, the type is determined (B-
20) If it is communication (I), the card is set to the data input side (B-25), and serial communication is performed to receive data (see CA table) from the camera. Based on this data, a data setting and exposure calculation subroutine is executed (B-35, B
-37), then determines whether the release switch (S ₂₎ is ON (B-38), prohibits the AF when being ON (= 1) as (B-39), sleeps .

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using a bracket card table.

In communication (II): ・ FL forced OFF (= 1) CS II-1-b ₂・ Does card control display? CS II-1-b ₄・ Card function ON / OFF CS II-1-b ₅・No communication (V) (= 0) CS II-2-b ₂ · Release prohibited CS II-2-b ₃ · Forced continuous shooting (= 1) CS II-2-b ₄ · AF prohibited CS II-2-b ₇ • ΔA _v , ΔT _v data (= 1) CS II-3-b ₀ • T _v , A _v / Display data (= 0) CS II-3-b ₃ • Communication (IV) available (= 1) CS II-3-b ₄ · communication (III) No (= 0) CS II-3 -b 5 · communication type CS II-3-b ₆ · metering loop iteration CS II-3-b ₇ signals than all " It is set to "0", and the asterisk in the table sets "1" or "0" according to the time. When "1", the control is ON, and when "0", the control is OFF. "0" and "1" are determined for fixed items. In communication (II),
Other than that, there is no direct address type communication data (two times) in communication (IV), its address (CS II-7, 8), and communication in group communication (III). Therefore, CS II-9- ( b ₁ ,
b ₂ ) = 0,0, Communication (IV) is display only, CS II−10−b ₁
= 1, otherwise "0".

Where there is nothing written, any data may be included.

In communication (IV), data of ΔA _v · ΔT _v are stored in the RAM.

In communication (VI), a sleep enable / disable signal is sent.

The data setting subroutine will be described with reference to FIG. 58 (a). In step (B-146 to B-149), the display control data is set to "0", release inhibition is inhibited (= 0), and AF inhibition is inhibited (= 0), prohibition of prohibition of photometry loop repetition (= 0)
Initially set to

Next, in step (B-150), it is determined whether the cancel signal is 1 or not, and if "1", the release is prohibited (B-15).
2), is not "1", N _1, it is determined whether or not N-1 (B-151) , the case of N-1, and a release prohibition (B-152) as a set number ends, otherwise Does nothing and proceeds to step (B-160).

In step (B-160), it is determined whether or not the DISREQ (request for displaying the card name) signal obtained in the communication (I) is "1". If the signal is "1", the display control data is changed to "1". "1", the card display function ON / OFF is set to ON (1), and the data for group designation is set to (0) (B-170, B-195). Next, in step (B-200), it is determined whether or not the flag (SIF) is set. If the flag (SIF) is not set, the flow is passed for the first time, and the flag (SIF) is set.
-205), reset and start the timer (B-21)
0) Proceed to step (B-215). When the flag (SIF) is set, the process proceeds to step (B-215).
In step (B-215), it is determined whether the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, the photometry loop repetition signal is set to "1" (B-220), and a card display name and data for performing only card display are set (B-220).
-222) Return. This display is shown in FIG. On the other hand, when 10 seconds have elapsed, the flag (SIF) is reset (B-226), and the display control data is set to "0" (B-227).
To return.

When DISREQ = 0 in step (B-160), IP ₅ =
It is determined whether or not it is "L" ( _SEM , S _FUN , S _CD , S _CDS , S ₁ is ON) (B-162). When "L", the card name is displayed. The display flag (display F) shown is reset (B-163), and if it is not "L", the process goes to step (B-165) without doing anything to reset the flag (SIF). Thereafter, the step (B-26) shown in FIG.
Proceed to 0) and the self signal obtained in communication (II) is "1"
It is determined whether or not.

If the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). When the self signal is not "1", it is determined whether or not the card setting switch (S _CDS ) is turned on (D-26).
Five). When the signal is ON (signal = 1), it is determined in step (B-270) whether or not the flag (S _CDS IF) indicating that the signal has passed is set. Proceed to step (B-276), and if not set, set (B-275) and proceed to step (B-276). In this step (B-276), it is determined whether or not the setting is being performed. If the setting is not being performed, the process proceeds to step (D-405) to perform display control in the setting mode.

If the setting is being performed (SETF = 1), the operation has been performed to exit the set, and the display returns without performing the display control.

If the switch (S _CDS ) is OFF in step (D-265), the _flow advances to step (B-280) to determine whether or not the flag (S _CDS IF) is set. Proceed to (B-310). If it is set, it is reset (B-285), and it is determined in step (B-290) whether or not a flag (SETF) indicating that data is being set is set. reset (B-295), E ² and the PROM write signal (sent to the camera) to 1, it sets the direct addressing, DerutaAv, so as to output the .DELTA.TV (B-30
0), and proceed to step (B-310). As a result, the setting is exited, and the data is written to the E ² PROM in the IC card. If the flag (SETF) indicating that the setting is in progress is not set, the flag is set (B-305) to enter the data setting mode, and the flow proceeds to step (B-310). Step (B-31
In (0), if the setting is being performed (SETF = 1), it is determined whether or not the card switch (S _CD ) is ON based on the data of the communication (II) (D-315). S _CD =
1) It is determined whether or not a flag (S _CD IF) indicating that the signal has passed is set (B-320). If the flag is set, the process proceeds to step (B-345). If it is not set, this is set in step (B-325) (S _CD IF = 1), and in the next step (B-330), the change mode is advanced by one to 12, and step (B-345) Proceed to.

Here, the change mode 1 is the setting of the shift amount 2 is the setting of the number of shots. If the card switch (S _CD ) is not turned on in step (B-315) (S _CD = 0), it is determined in step (B-335) whether the flag (S _CD IF) is set. If it is not set, it is determined that nothing has been operated, and the process proceeds to step (B-345). If it is set, the switch (S _CD ) is changed from ON to OFF.
After resetting this flag in step (B-340), the flow advances to step (B-345). In step (B-345), it is determined whether or not the up switch (S _up ) is ON. If it is ON (S _up = 1), it is determined whether the mode is 1 (B-350). ), 1 → 2 when mode is 1
The process proceeds to 3 and cyclically proceeds to return to 1 after 3 (B-355).

Wherein one of the time of mode 1 0.3E _v 2 is 0.5E _v 3 is exposed shift amount of 1.0E _v.

Also in the case of mode gas, it progresses from 1 to 2 to 3;
(B-365).

Is the number of films.

When the change in each mode is completed, step (B-40)
Proceed to 5). When the up switch (S _up ) is OFF, it is determined whether or not the down switch (S _dn ) is ON (B
If it is not ON, the process proceeds to step (B-405). When the switch is turned on, the switch (S _up ) is the same as the switch (S _up ) _except that the direction of change is the same.

When the processing of (S _up ) and (S _dn ) is completed, step (B)
−405), display control = 1, release prohibition = 1, AF
Prohibition = 1, group designation = 0, photometry loop repetition = 1, set display data during data setting, and return. The display during this setting will be described later. As a result, the camera executes the function of continuing the display regardless of the display control release prohibition, AF prohibition and the power holding timer of the camera.

In the above step (B-310), setting is not in progress (SETF =
0), the step (b-43) shown in FIG.
Proceeds to 0), and determines whether the card switch (S _CD) is turned ON, when the card switch (S _CD) is OFF, reset the flag _{(S CD F) (B-} 460), a display It is determined whether or not the flag (display F) is set (B-46).
2) If not set, return. If the display flag is set, the flow advances to step (B-170) to control the display of the card name. Card switch (S
_{When CD} ) is ON, a flag (S
_CD F) is set or not (B-435),
If it is set, it is determined that the switch is being operated, and the process proceeds to step (B-462). If it is not set, it is reset (B-440), and it is determined whether the card function is currently ON (B-445). If it is ON, it is turned OFF (communication II data). (B-45
0), reset the flag display (display F) (B-451)
To return. If it is OFF, it is turned ON (communication II data) (B-455), and the display flag is set (B-45).
6), the process proceeds to a step (B-170) to perform display control of the card name.

Returning to FIG. 57, if it is not communication (I), it is determined whether it is communication (II) or not (B-40). If it is communication (II), the card is output to output the set data to the camera. Side (B-45), perform serial communication 10 times (B-50)
Go to sleep.

If it is not communication (II), it is determined whether it is communication (IV) or not (B-55). If it is communication (IV), the card is set to the output side (B-60), and it is determined whether or not a group is designated. Judgment is made in (B-65), display data is output when a group is designated (B-70), an address is set, serial communication is performed 9 times (B-75), and step (B-75) is performed.
Go to 90). When the group is not designated (direct address designation), the address of the change data of ΔT _v , ΔA _v is designated (B-80), serial communication is performed twice (B-85), and the step (B-90) is performed. move on. In step (B-90), E ² PR
It is determined whether or not the OM write signal is set. When the OM write signal is set, the mode (I) No. mode (II)
No. 1 byte data is output to a predetermined address of the E ² PROM to write a write control signal (B-9).
Five). Writing to the E ² PROM is performed by hardware, and the microcomputer (μC) only needs to send a control signal. Then, the writing end signal (this signal is automatically set by the hardware configuration when the writing is completed) is reset (B-10).
0), sleep. Sleeps immediately when there is no write signal. If it is not communication (IV) in step (B-55), it is determined that communication is (VI). First, it is determined by the end signal whether writing is completed, and if it is completed, a sleep enable signal is set ( B-110), if not completed, a sleep disable signal is set (B-11).
5), proceed to step (B-120), perform serial communication according to the clock from the camera as the data output side, and sleep (B-125).

FIG. 60 shows the details of the exposure calculation subroutine in the above flow. In FIG. 60, if the card function is OFF, the process returns without doing anything. If the card function is ON, steps (B-505) to (B-5) are performed.
In 20), determine the mode of the shift amount and the shift amount (ΔEv)
And the steps (B-525) to (B-54)
In step 0), the mode of the number of shots is determined and the number of shots is set. After these determinations and setting are completed, initial settings are made in steps (B-545), (B-555), and (B-560), and the first of the number is set to an appropriate exposure. And
When the release switch (S ₂ ) is turned on, 1 is added to the counter N ₁ indicating the number of sheets, a determination of N ₁ is made, and steps (B-570), (B-575),. B-595)
Change the exposure in the following order.

Thereafter, the process proceeds to step (B-600), where the exposure mode is determined. In the P mode, 1 / 2ΔEv is corrected for each of the aperture shutter speeds. In the A and S modes, the calculated shutter speed and aperture value are changed. In the correction and M modes, assuming that the aperture value is to be changed when the aperture change switch is ON and the shutter speed is to be changed when the aperture change switch is OFF, ΔTv and / or ΔAv corresponding to each mode are set so as to correct by ΔEv. I do.

FIG. 61 shows a display during data setting in the case of a bracket card.

FIG. 7A shows a normal display. When the card setting key is turned on in this state, the display changes as shown in FIG. 7B, and the previously set exposure amount (ΔEv) and the number of films (N) are set. Is displayed, and when the card setting key is turned off, only the portion indicating the exposure amount blinks as shown in (c).
Here, each time the up key (up switch) is turned on, (c) → (d) → (e) → (c) →..., And each time the down key (down switch) is turned on, (c) → (e) ) →
(D) → (c) →...

For example, when the card key is turned on in the state of (d), the number of films flashes (g), and when the up key is turned on from the state of (g), (g) → (h) →
(F) → (g) →… and turn on when the down key is turned on
Every time, (g) → (f) → (h) → (g) →.

Then, for example, in the state of (f) above, the card setting key is
When it is turned on, the normal display is made as shown in FIG.

Next, the operation of the close-up (close-up) card will be described.

Here, the close-up card is used at the time of close-up shooting.

(6) Close-up card When the close-up card is attached to the camera,
The reset routine shown in the figure is executed to reset all flags and registers (RAM) (E-5), and sleep.

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the card, the card executes an interrupt shown in FIG. Here, the card performs serial communication once to input data indicating the type of communication in synchronization with the clock sent from the camera (E-1).
Five).

From the data from this communication, the type is determined (E-
20) If it is communication (I), the card is set to the data input side (E-25), and serial communication is performed (E-30) to receive data (see CACD) from the camera. A data setting subroutine is executed based on this data (E-30),
Go to sleep.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using a close-up card table.

In communication (II): ・ FL forced ON (= 1) CS II-1-b ₁・ GN restriction release (= 1) CS II-1-b ₃・ Whether or not the card performs display control CS II-1 −b _4. Card function ON / OFF CS II-1-b _5. Shake buzzer on / off CS II-1-b _7. P shift prohibited (= 1) CS II-2-b ₀ • Forced P mode (= 1) CS II-2-b ₁ · No V-th communication (= 0) CS II-2-b ₂ · Release prohibited (= 1) CS II-2-b ₃ · AF one shot (= 1) CS II- _{2-b 6 · T v,} A v / display data CS _II-3-b 3 · IV of communication Yes (= 1) CS II-3 -b 4 · Part III communication Yes (= 1) CS II-3- b ₅ · group specification (= 0) CS II-3 -b 6 · metering loop iteration CS II-3-b ₇ · camera shake buzzer control (= 1) CS II-4 -b 0 · AF spot (= 1) CS II-4-b ₁ · low contrast scanning inhibited (= 1) CS II-4 -b 2 the above to Oite, AF one-shot by the camera This means that AF tracking mode after focusing is prohibited.

In the above, the AF spot is used for close-up photography because the image magnification is large. This is because the information of focus detection in the area of the moved portion is often captured and it is difficult to focus, so that this is prevented. The low-contrast scanning is prohibited because the macro lens has a narrow focus range with respect to the subject, and the low-contrast is immediately obtained.

Note that all signals other than the above are set to “0”, and the asterisks in the table set “1” or “0” according to the time, and “1”
The control is ON at the time of, and OFF at the time of "0". "0" and "1" are determined for fixed items. In communication (II), other communication in group communication (III)
In order to designate group 1 of CS II-9-b ₁ = 1, communication (I
V) is the display and control data, so CS II-10-b ₁ ,
b ₂ = 1, 1, otherwise, “0”.

In the above table, any data may be entered where nothing is written.

In communication (VI), a sleep enable signal is sent. This is because there is no write control to the E ² PROM.

Next, the data setting subroutine will be described with reference to FIG. 64 (a). First, steps (E-146) and (E-14)
7) Display control data is “0”, release prohibition is “0”
To (E-160).

It is determined in step (E-160) whether the DISREQ (request for displaying the card name) signal obtained in the communication (I) is "1", and if it is "1", the display control data is changed to "1". 1 ”and set the card display function ON / OFF to ON (1) (E-170, E
-175). Subsequently, it is determined whether or not the flag (SIF) is set (E-200). If the flag (SIF) is not set, the flow is passed for the first time and the flag (SIF) is set (E-205). Is reset-started (E-210) and the routine proceeds to step (E-215). Flag (SI
Step (E-215) is also performed when F) is set.
Proceed to. In step (E-215), the timer is set to 10
It is determined whether or not seconds have elapsed. If 10 seconds have not elapsed, the photometry loop repetition signal is set to “1” (E-22).
0), a card display name and data for performing only card display are set (E-222), and the routine returns. This display is number 65
Shown in the figure. On the other hand, when 10 seconds have elapsed, the photometry loop repetition signal is set to “0” (E-225), and the flag (SIF) is set.
Is reset (E-226), the display control data is set to "0" (E-227), and the routine returns.

Proceeds to step when DISREQ = 0 in the above step (E-160) (E- 162), terminal IP ₅ = "L" (i.e., the switch _{S EM, S FUN, S CD} , S CDS, the S ₁ It is determined whether any of them is ON), and when it is "L", the display flag (display F) indicating the control for displaying the card name is reset (E-16).
3) If not "L", do nothing and proceed to step (E-165).

After resetting the flag (SIF) in step (E-165), the flow advances to step (E-260) in FIG. 64 (b) to determine whether the self signal obtained in communication (II) is "1". Is determined.

If the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). -Out self-signal is not "1", the flow proceeds to step # 64 Figure (c) (E-430) , determine whether the card switch (S _CD) is turned ON, the card switch (S _CD) is when set to OFF, resets the flag _{(S CD F) (E-} 460), display flag (display F) it is determined whether or not has been set (E-465), when the flag is not set, returns . If it is set, the flow advances to step (E-170) to control display of the card name. Step (E-43
0) and the card switch (S _CD ) is ON, the flag (S
Step (E-435) whether or not _CD F) is set
When it is determined that the switch has been set, it is determined that the switch operation has been continued, and the process proceeds to step (E-465). If it is not set, it is reset (E-440) and the next step (E-440) determines whether the card function is currently ON.
445), and if it is ON, it will be OFF (communication (I
(I) Data) and returns (E-450). If it is OFF, it is turned ON (communication (II) data), and the flow advances to step (E-170) to control the display of the card name.

Referring back to FIG. 63, if it is not communication (I), it is determined whether it is communication (II) or not (E-40). If it is communication (II), the card is output to output the set data to the camera. Side, and perform serial communication 10 times (E-50) to sleep.

If it is not communication (II), it is determined whether it is communication (III) or not (E-51). If it is communication (III), input the card side (E-52) and perform serial communication 15 times Then (E-53), the camera data is input, and the next step (E-54) is to calculate (including exposure calculation) data for controlling the camera and sleep. This calculation will be described later. If it is not communication (III), it is determined whether it is communication (IV) or not (E-55). If it is communication (IV), the data is set to the output side (E-60) and it is determined whether or not display control is performed. (E
-65), display data is output during display control (E-70), an address is set, serial communication is performed 9 times (E-75), and then sleep. When not in display control ( _Tv , _Av data) _Tv , _Av data addresses are specified, and serial communication is performed four times to sleep. Communication (I
If not V), the communication is determined to be communication (VI). First, serial communication is performed on the data output side according to the clock from the camera (E-25) to sleep.

Next, the subroutine of the calculation of the step (E-54) in FIG. 63 will be described with reference to FIGS. 66 (a) and 66 (b).

First, in step (E-500), the camera shake limit T _VH is calculated from the focal length f by the following equation: T _VH = 1.25 × log ₂ f / 50 + 5.875, and this T _VH limit is determined in steps (E-505) to (E-505).
(E-520).

Then, in step (E-525) ~ (E -535), as far as possible Avbeta, the shutter speed that determines the Furashi'yu emission in order to perform the natural light photography with A _v1 and (TV _H) (TV
x) is processed to find the smaller one. Here, the T _vx tuning speed is represented. Next, steps (E-544) to
In (E-570), the control limit of the control shutter speed (T _vc ) and the control aperture value (A _vc ) are determined from the control limit exposure value. In the next step (E-575), it is determined whether or not the image magnification β is valid. If the image magnification β is not valid, the flow proceeds to the flow from step (E-670).
At 0), it is determined whether β ≧ 1. Here, when β ≧ 1,
Since the characteristics of this close-up card cannot be utilized, the card function is turned off (E-585), and the routine returns. β <1
In step (E-590), it is determined whether β <1/4. Here, when β <1/4, step (E-6)
70) If β> 1/4, go to step (E-595)
Avβ is calculated according to the equation Avβ = 7−log ₂ 1 / β. The situation in this case is shown in FIG. 67, and the program diagram thereof is shown in FIG. 68.

Hereinafter, the flow after step (E-600) is executed.

Let AVc be AVβ. Calculation shutter speed TV is EVs-EVc
Then, it is determined whether or not this TV exceeds TVmax. If it does, the control shutter speed (TVc) is set to TVmax, and the control aperture value (AVc) is calculated as EVs-TVmax.

When TV ≦ TVmax, determines whether the TV <TV _F, TV <TV
_{If F} , TVc is set to TV and proceed to $ 660. TV <When a TV _F, obtains control aperture value (AVc) in EVs-TV _F, AVc <AV
Determine if it is min. When AVc <AVmin, AVc =
AVmin, TVc is obtained from EVs-AVc again, and the process proceeds to (# 660). When AVc ≧ AVmin, proceed to (♯660) the TVc as TV _F. Exposure value (EVs), it is determined whether or not TV _F + AVmin or more, the process proceeds to flash control when EVs <TV _F + AVmin a and flash ON.

When the object occupying the screen becomes small (β is small), the amount of reflected light returned from the object decreases, the completion of the dimming completion signal is delayed, and the amount of light emission increases, resulting in overexposure. In order to correct this, the light emission amount is reduced as β decreases. When β cannot be used, it is assumed that there are many subjects of 1/4> β, and TTL = χ + 0.75.

Then, the control light intensity (SVc) is added to TTL to the film sensitivity SV.

The dimming level calculation is shown in FIG. 66 (c) and explained. The exposure value (EVc) is obtained from AVc + TVc, and it is determined whether or not EVc−EVs (exposure value of the main subject)> 0. EVc−EVs ≦ 0
In the case of, the correction amount is set to χ = 1.5, the light emission amount (control light amount) is set to under, and the main subject is not over,
Proceed to E-840.

When EVc−EVs> 0, it is determined whether or not EVc−EVs> 3, and when EVc−EVs> 3, the correction amount χ = 0 and E-840 is set.
Proceed to. When EVc−EVs ≦ 3, χ = 1/2 (EVs−EVc +
Go to E-840 as 3). Determines whether the image magnification (beta) is available, perform (including when not mounted) camera shake decision when (♯660) when EVs ≧ TV _F + AVmin or flash OFF in usable. Shake determination is based on that of a sports card.

At $ 775, you can't release it without focusing. That is, if focus is not achieved, release prohibition = 1 is set,
If focus is achieved, release inhibition is set to 0, and the routine returns.

β6 when β information is not valid or β <1/4
Proceeding to step 70, in the above step (E-670), the calculation of _Av1 is performed. This is performed according to the following equation. Steps (E-680) to (E-695)
Performs the limit correction of the aperture value and obtains the control aperture value (TV
Obtain the control shutter speed from c) and proceed to # 660.

 Next, the operation of the auto shift card will be described.

The auto shift is to change the combination of A _v and T _v while keeping the exposure amount constant.

(7) Auto shift card The auto shift card executes the reset routine shown in FIG.
M) Reset all the information mode information in E ² PROM to R
Move to AM and sleep (T-5, T-10).

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the card, the card executes an interrupt shown in FIG. Here, the card performs serial communication once to input data indicating the type of communication in synchronization with a clock sent from the camera (T-1).
Five).

From the data from this communication, the type is determined (T-
20) In the case of communication (I), the card is set to the data input side (T-25), serial communication is performed (T-30), and data (see CACD table) is received from the camera. Based on this data, a data setting subroutine is executed. Next, it is determined whether or not the release switch (S ₂ ) is ON (T-38). If the release switch (S ₂ ) is ON, AF is prohibited (T-38). −3
9), sleep.

Before describing the above subroutine, what data is output from the card in response to communication will be described using an auto shift card table.

In communication (II): ・ FL forced OFF (= 1) CS II-1-b ₂・ Does card control display? CS II-1-b ₄・ Card function ON / OFF CS II-1-b ₅・Shake buzzer ON / OFF CS II-1-b ₇ • P shift prohibited (= 1) CS II-2-b ₀ • Forced P mode (= 1) CS II-2-b ₁ • No Vth communication (= 0) ) CS II-2-b ₃ · Release prohibited CS II-2-b ₄ · Forced continuous shooting (= 1) CS II-2-b ₄ · AF prohibited CS II-2-b ₇ · T _v , A _v / Display data CS II-3-b ₃・ IV communication (= 1) CS II-3-b ₄・ III communication (= 1) CS II-3-b ₅・ Communication type (= 0) CS II -3-b ₆ · Photometry loop repetition CS II-3-b ₇ · Camera shake buzzer control (= 1) All signals except CS II-4-b ₀ signal are set to “0”. To set "1" or "0". When "1", the control is ON, and when "0", the control is OFF. "0" and "1" are determined for fixed items. In communication (II),
Since only that communicate in a group communication in addition (III) is _{G 1, CS II-9- (} b 1, b 2, b 3) = 1,0,0, communication (IV) is a display and control data 2 CS II−10−b ₁ , b ₂ =
1, 1 and others are set to “0”.

In the above table, any data may be entered where nothing is written.

In communication (VI), a sleep enable / disable signal is sent. The data setting subroutine is described with reference to FIG. 71 (a). First, the display control data is set to "0", release inhibition is inhibited (= 0), and AF inhibition is inhibited (= 0) in step (T-146). To (T-148), and then to step (T-148).
In 149), the photometry loop repetition is set to “0”.

Next, it is determined whether the cancel signal is "1" (T-
150), if “1”, release is prohibited (T-152)
"1" if not determines whether N ₁ is "2" (T-15
1) In the case of "2", it is determined that three images have been taken, release is prohibited (T-152), otherwise, nothing is performed and the process proceeds to each (T-160). DISREQ obtained by communication (I)
It is determined in step (T-160) whether the signal of (request for displaying the card name) is “1”, and if it is “1”,
Set the display control data to “1” and turn the card display function ON / OFF.
Turn ON (1) (T-170, T175). And the flag (SI
It is determined whether or not F) is set (T-200). If it is not set, the flag (SIF) is set (T-205) for the first time that the flow passes, and the timer is reset and started. (T-210), step (T
Go to -215). Even when the flag (SIF) is set, the process proceeds to step (T-215). Step (T-21)
In 5), it is determined whether or not 10 seconds have elapsed in the timer. If 10 seconds have not elapsed, the photometry loop repetition signal is set to "1" (T-220), a card display name and data for performing only card display are set (T-222), and the process returns. This display is shown in FIG. On the other hand, if 10 seconds have elapsed, the flag (SIF) is reset (T-226), the display control data is set to "0" (T-227), and the process returns. When DISREQ = 0 at the step _{(T-160), IP 5} = "L" to determine whether _{(S EM, S FUN, S} CD, S CDS, either S ₁ is ON) is ( T-162), "L"
In this case, the display flag (display F) indicating the control for displaying the card name is reset (T-163). If the flag is not "L", the process goes to step (T-165) without doing anything, and the flag (SIF) is reset. Reset. Thereafter, the flow advances to step (T-260) in FIG. 71 (b) to determine whether or not the self signal obtained in communication (II) is "1".

If the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). When the self signal is not "1", it is determined whether or not the card setting switch (S _CDS ) is turned on. When the signal is ON (signal = 1), it is determined in step (T-270) whether or not the flag (S _CDS 1F) indicating that the signal has passed is set. The process proceeds to step (T-270). If it is not set, it is set (T-275). If it is set, the process proceeds to step (T-276) without doing anything. In this step (T-276), it is determined whether or not the camera is being set,
If it is not set, the process proceeds to step (T-405) to display a display in which the setting mode has been entered. If set (SETF =
1) Since the operation was performed to exit the set, the process returns without performing the display control. If the switch (S _CDS ) is OFF (0) in step (T-265), step (T-280)
To determine whether or not the flag (S _CDS 1F) is set. If the flag (S _CDS 1F) is not set, the process proceeds to step (T-31).
Go to 0). If it is set, it is reset (T-285) and a flag (SETF) indicating that data is being set
Is determined in step (T-290), and if it is set, it is reset (T-295), the E ² PROM write signal is set to 1, and direct address designation = 1 is set ( T-300), Step (T-310)
Proceed to. This exits the setting process. If the flag (SETF) indicating that the setting is in progress is not set, the flag is set (T-305), the mode is set to the data setting mode, and the process proceeds to step (T-310).

In step (T-310), the flag (SETF) is set to "1".
It is determined whether or not it is “1”, and the step (T-345)
Proceed to. In step (T-345), the up switch (S
_UP ) is turned on or not, and if it is turned on (S _UP = 1), proceed from 1 → 2 → 3 and proceed cyclically to return to 1 after 3 (T-355). .

Here, 1 is a shift amount of 0.1Ev, 2 is 2Ev, and 3 is a shift amount of 3Ev.

When the change in this mode is completed, step (T-405)
Proceed to. When the up switch (S _UP ) is OFF, it is determined whether the down switch (S _dn ) is ON or not (T-37).
5) If not ON, go to step (T-405). When the switch is turned on, the switch (S _UP ) is the same as the switch (S _UP ) _except that the direction of change is the same, so that the description is omitted.

When the processing of (S _UP ) and (S _dn ) is completed, step (T−
405) The display control = 1, release prohibition = 1, AF prohibition = 1, group designation (= 0), photometry loop repetition = 1
Then, the display data being set is set, and the process returns. The display during this setting will be described later. This allows the camera to control display by card, prohibit release,
Executes the function to continue the display regardless of the AF prohibition and the camera power holding timer.

In the above step (T-310), the setting is not in progress (SETF =
0), the step (T-43) in FIG.
Proceed to 0) and determine whether the card switch (S _CD ) is ON or not. If the card switch (S _CD ) is OFF, reset this flag (S _CD F) (T-460) and display It is determined whether or not the flag (display F) is set (T-46).
5) If not set, return. If it is set, the flow advances to step (T-170) to control display of the card name. When the card switch (S _CD ) is ON, it is determined whether or not the flag (S _CD F) indicating that the card has passed here is set. (T-46
Proceed to 2). If it is not set, it is set (T-440), and it is determined in the next step (T-445) whether the card function is currently ON, and if it is ON, it is OFF (communication) (T-450), reset the display flag (display F) (T-451), and return. If it is OFF, turn it ON (communication (II) data) (T-455), set the display flag (display F), go to (T-456), and proceed to (T-170). Performs name display control.

Returning to FIG. 70, if it is not communication (I), it is determined whether or not it is communication (II) (T-40). If it is communication (II), the card is output to output the set data to the camera. Side (T-45), perform serial communication 10 times (T-50)
Go to sleep.

If it is not communication (II), it is determined whether or not it is communication (III) (T-55). If it is communication (III), data is set to the input side (T-52) and data communication is performed 15 times. (T-53), and further calculate ΔT _v and ΔA _v in step (T-5)
Go to step 4) and return. FIG. 73 (a)
(B).

Next, when the communication is not the communication (III), it is determined whether or not the communication is the communication (IV) (T-55). When the communication is the communication (IV), the data is set to the output side (T-60). Is determined (T-65), and if display control is performed, display data is output (T-70), an address is set, serial communication is performed 9 times (T-75), and step (T-75) is performed. Proceed to). If the display control is not performed, the address of the control data is designated, serial communication is performed four times (T-85), and the process proceeds to step (T-90). Step (T-90) in, to determine whether E ² PROM write signal is set, when set, E ² a predetermined address of the PROM a byte of data NO. Mode (I) , A write control signal is output (T-95). Writing to the E ² PROM is performed by hardware, and the microcomputer (μC) only needs to send a control signal. Then, in step (T-100), the write end signal is reset (this signal is automatically set by the hardware configuration when the writing is completed), and sleeps. If there is no write signal, sleep immediately. If it is not a communication (IV), it is a communication (VI)
First, whether the writing is completed is determined by the end signal (T-105). If the writing is completed, the sleep enable signal is set (T-110).
Set the sleep disable signal respectively (T-115),
Step (T-120) Serial communication is performed according to the clock from the camera as the data output side (T-125) to sleep.

The arithmetic control in step (T-54) in FIG. 70 is shown in FIGS. 73 (a) and 73 (b). Here, BV _A background brightness, BV _S is the main object luminance, BV _AVE represents an average luminance. If the card function is OFF, return. When the card function is ON, it is determined whether or not BVA-BVS ≧ 1 and the BV
BVC = BDS when A−BVS ≧ 1, BVC = BV when BVA−BVS <1
A-VE. This is to give priority to the main subject so that the whole is also properly exposed. Exposure value is calculated by BVc + SV, which indicates that this value exceeds the control limit value. If the answer is YES in steps (T-525) and (T-530), the shift function cannot be performed, and the routine returns with the card function turned off. The calculation of the control exposure value in the step (T-540) is considered so as not to meet both the limit values of the aperture value and the shutter speed as much as possible.

The control shutter speed (TVc) is determined from the determined AVc and EVc, and the mode is determined. When I, ΔEV = 1,
In the case of II, ΔEV = 2, and in the case of III, ΔEV = 3. ΔEV = 3
After that, it is determined whether or not the open F-number exceeds 4, and if it exceeds 4, since the number of aperture stages of the lens is often only 6 steps,
Proceed to (T-590) with ΔEV = 2.

In (T-580), it is determined whether or not the release switch (S ₂ ) is turned on. If not, N ₁ = 0, Δ
By setting AV = 0 and ΔTV = 0, the first sheet is set as shown in the program diagram. However, since the program shift is enabled, ΔAV
₁ , ΔTV ₁ is added or subtracted by 0.5 EV (T-66
Go to 0).

When the release switch (S ₂ ) is ON, add 1 to N ₁
Performing determination of N _1, 1 when ΔTV = ΔEV, ΔAV = -ΔE
In the case of V, 2, ΔTV = −ΔEV, ΔAV = −ΔAV, in the case of 3, no setting is made and the process proceeds to (T-660). In (T-660), TV = TV
c + ΔTV ₁ + ΔTV, AV = AVc + ΔAV ₁ + ΔAV, TV and AV are obtained,
When the TV and AV exceed any of the control limits TVmax, AVmin, AVmax and AVmin, the control limit value is set to TV or AV, and the control limit value is fed back to the control limit value (AVc). , Control shutter speed (TGc). Then, the camera shake shutter speed (TV _H ) is obtained by TV _H = 1.125 × log2f / 50 + 5.875 (f: focal length). When the release switch (S ₂ ) is ON, the camera shake buzzer is turned OFF and the routine returns. When the release switch (S ₂ ) is not turned on, the TV is shifted by subtracting −ΔEV. It is determined whether or not the TV value is equal to or less than the camera shake shutter speed ( _TVH ) -2 EV. If the TV value is less than or equal to, the camera shake buzzer is turned on, and if TV> _TVH- 1, the camera shake buzzer is turned off. To return.

Here, the reason why the camera shake limit is set to TV _H -1 is that the probability of camera shake is small for the second and subsequent sheets, that is, there is no depression of the relays button. In addition, I want to take the second card without any worries, so I minimize the sounding of the camera shake buzzer.

74 The figure shows the basic program chart determination of the T _V, A _V.

FIG. 75 shows a display during data setting. When the card setting key is operated from the state of the normal photographing mode (a), the setting mode becomes, for example, as shown in (b).
Here, the upper 1 and the lower CARD blink. 1 in the upper row indicates the shift amount, and 3 in the middle row indicates the number of shots.
When the up / down key is operated in the state of (b), (b) → (c) → (d) → (b)... Or (b) → (d) → (c) → (b) ... and change. In any case, when the card setting key is pressed, the mode returns to the normal shooting mode (a). In FIG. 75,
In the normal shooting mode (a), only blocks are shown, and specific displays are not shown.

 Next, the operation of the H / S card will be described.

An H / S card is a black one that has a certain amount of under exposure (highlight H) to make it blacker, and a white one that has a certain amount of exposure over that of white to make it whiter (shadow S). It is to be.

(8) H / S card H / S card, when mounted on the camera to perform a reset routine of the 76 view, flag, register all (RAM) is reset (H-5), E ² in PROM (H-10) (HS mode).

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the card, the card executes an interrupt shown in FIG. Here, the H / S card performs serial communication once to input data indicating the type of communication in synchronization with a clock sent from the camera (H / S card).
-15).

From the data from this communication, the type is determined (H-
20) If the communication is (I), the card is set to the data input side (H-25), and serial communication is performed (H-30) to receive data (see CACD table) from the camera. Based on this data, a data setting subroutine is executed (H-3
5), sleep.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using an H / S card table.

In communication (II): ・ FL forced OFF (= 1) CS II-1-b ₂・ Does card control display? CS II-1-b ₄・ Card function ON / OFF CS II-1-b ₅・No communication (V) (= 0) CS II-2-b ₃ · Release prohibited CS II-2-b ₄ · AF prohibited CS II-2-b ₇ · T _v , A _v / Display data CS III-b ₃ • With communication (IV) (= 1) CS III-b ₄ • With communication (III) (= 1) CS III-b ₅ • Communication type CS III-b ₆ • Photometry loop repetition Other than signals of CS III-b ₇ Are all set to "0". From the table, the * mark sets "1" or "0" according to the time, and when "1", the control is ON, and when "0", the control is OFF. "0" and "1" are determined for fixed items. In communication (II),
Communication in the other (IV) directly address type of traffic data Number of (2 times), the address (CS II-7, 8), communicating in a group communication (III) is (G _1), (G ₃₎ And CS II
−9− (b ₁ , b ₂ , b ₃ ) = 1,0,1, Communication (IV) is display only, so CS II−10−b ₁ = 1, otherwise set to “0”.

In the above table, any data may be entered where nothing is written.

In communication (IV), data of ΔA _v and ΔT _v are stored in the RAM.

In communication (VI), a sleep enable / disable signal is sent. Next, the data setting subroutine will be described with reference to FIG. 35 (a). First, steps (H-146) to (H-1)
In step 49), the display control data is initially set to "0", release prohibition prohibition (= 0), AF prohibition prohibition (= 0), prohibition of photometry loop repetition (= 0), and step (H-160).
Proceed to.

In step (H-160), DISREQ obtained in communication (I) is obtained.
It is determined whether the signal of (request for displaying the card name) is “1”, and if it is “1”, the display control data is set to “1”.
To set the card display function ON / OFF to ON (1) and set the data for group designation to (0) (H-170 to H-195). Subsequently, it is determined whether or not the flag (SIF) is set (H
-200), if not set, this flag (SIF) is set for the first time through this flow (H-20)
Along with 5), the timer is reset and started, and the process proceeds to step (H-210) and step (H-215). When the flag (SIF) is set, the step (H-2)
Proceed to 15). In step (H-215), it is determined whether or not the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, the photometry loop repetition signal is set to “1” (H−22).
0), a card display name and data for performing only card display are set (H-222), and the routine returns. This display is number 79
Shown in the figure. On the other hand, if 10 seconds have elapsed, the flag (SI
F) is reset (H-226), the display control data is set to "0" (H-227), and the routine returns.

When DISREQ = 0 in step (H-160), IP ₅ =
It is determined whether or not "L" ( _SEM , S _FUN , S _CD , S _CDS , S ₁ is ON) or not (H-162). When "L", the card name is displayed. The display flag (display F) shown is reset (H-163), and if it is not "L", the process proceeds to step (H-165) without doing anything, and the flag (SIF) is reset. Thereafter, the step (H-26) in FIG.
Proceed to 0) and the self signal obtained in communication (II) is "1"
It is determined whether or not. If the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). If the self signal is not "1", it is determined whether or not the card setting switch (S _CDS ) is ON (H-265). When the signal is ON (signal = 1), it is determined whether or not a flag ( _SCDS 1F) indicating that the signal has passed is set (H-270). If the flag is not set, the signal is set. (H-275), and do nothing when set (H-276).
The program proceeds to step (H-405), where it is determined whether or not the setting is being performed. If the setting is being performed (SETF = 1), the operation has been performed to exit from the set, and the process returns without performing the display control. When the switch (S _CDS ) is OFF (0), the process proceeds to step (H-280), where it is determined whether or not the flag (S _CDS 1F) is set. When the flag (S _CDS 1F) is not set, the process proceeds to step (H-310). Proceed to). If it is set, it is reset (H-285), it is determined whether a flag (SETF) indicating that data is being set is set (H-290), and if it is set, it is reset. (H-295), and further sets the E ² PROM write signal to 1 and directly sets addressing (= 1) (H-300).
Proceed to step (H-310). This exits the setting process. If the flag (SETF) indicating that the setting is in progress is not set, the flag is set (H-305), the data setting mode is entered, and the process proceeds to step (H-310).

In step (H-310), if setting is in progress (SETF =
1), proceed to step (H-345), and proceed to step (H-34)
In 5), it is determined whether or not the up switch (S _UP ) is turned on (H-345). When the up switch (S _UP ) is turned on, (S _UP =
Proceed as in 1) and 12 (H-355). Here, 1 is a highlight mode, and 2 is a shadow mode. Upon completion of this mode change, the flow advances to step (H-405). When the up switch (S _UP ) is OFF, the step (H-37
Proceed to 5) to determine whether the down switch (S _dn ) is ON, and if it is ON, the above switch (S _UP )
And the direction of the change is the same (H-385), but the description is omitted.

When the processing of (S _UP ) and (S _dn ) is completed, the process proceeds to step (H-405) and thereafter, where display control = 1, release prohibition = 1, AF prohibition = 1, group designation = 0, photometry loop repetition = 1 , And sets the display data being set, and returns. The display during this setting will be described later. As a result, the camera executes a function of continuing display regardless of display control by the card, release prohibition, AF prohibition, and the power holding timer of the camera.

In step (H-310), setting is not in progress (SETF = 0)
If it is determined that, the step proceeds to (H-430), determine whether the card switch (S _CD) is turned ON, when the card switch (S _CD) is OFF, the flag (S _CD F) Is reset (H-460), and then the display flag (display F)
Is set (H-462), and if it is not set, the routine returns. If it is set, the flow advances to step (H-170) to control the display of the card name. In step (H-430), the card switch (S
_{When CD} ) is ON, it indicates that you have passed here. Flag (S
Step (H-435) whether or not _CD F) is set
If the switch is set, it is determined that the switch has been continuously operated, and the flow proceeds to step (H-462). If it is not set, it is reset (H-440) and the next step (H-440) determines whether the card function is currently ON.
445), and if it is ON, it will be OFF (communication (I
(I) data) (H-450) and display flag (display F)
Is set (H-451) and the routine returns. If it is OFF, set it to ON (communication (II) data) (H-45
5) Set the display flag (display F) (H-456),
Proceeding to step (H-170), display control of the card name is performed.

Returning to FIG. 77, if it is not communication (I), it is determined whether or not it is communication (II) (H-40), and if it is communication (II), the card is output to output the set data to the camera. Side (H-45), perform serial communication 10 times (H-50)
Go to sleep.

If it is not communication (II), it is determined whether it is communication (III) or not (H-51). If it is communication (III), data is set to the input side (H-52) and data communication is performed 17 times. (H-5
3) Perform the operations of ΔT _v and ΔA _v (H-54) and sleep.

Next, when the communication is not the communication (III), it is determined whether or not the communication is the communication (IV) (H-55). When the communication is the communication (IV), the data is set to the output side (H-60). Is determined (H-65), display data is output when the group is designated (H-70), the address is set, serial communication is performed 9 times (H-75), and the step (H-90) is performed. )
Proceed to. When not a group (direct addressing)
ΔE _v Specify the address of the change data and set the serial communication to 2
Go to step (H-90). Step (H-
In 90), it is determined whether E ² PROM write signal is set (when the H-90), is set, the mode 1 byte data E ² PROM predetermined in the No. of (I) Output a write control signal to write to the address (H
-95). Writing to the E ² PROM is performed by hardware, and the microcomputer only needs to send a control signal. Then, the writing end signal is reset (this signal is automatically set by the hardware configuration when writing is completed) (H-10
0), sleep. Sleeps immediately when there is no write signal. When the communication is not the communication (IV), the communication is determined to be the communication (VI). First, it is determined whether or not the writing is completed by the end signal (H-105). In some cases, the sleep disable signal is set, and step (H-120) is performed.
To perform serial communication according to the clock from the camera as the data output side (H-125) and sleep.

The arithmetic control in step (H-54) in FIG. 77 is shown in FIGS. 80 (a) and (b). Step (H-50
0) when the card function is not ON, or when step (H)
−505), when the AE lock switch is OFF, the correction amount ΔT _v ,
ΔA _v = 0 (H-515, H-520). Also, when the mode is the M mode in step (H-510), step (H-51) is executed.
5) Proceed to (H-520). This is for M mode
This is because the photographer's set values (A _v ) and (T _v ) are prioritized, and no correction is made by H / S. If it is not mode I in step (H-525), that is, if mode II (shadow),
Go to the flow of FIG. When the mode is the mode I, the process proceeds to the highlight control after the step (H-530).

And the P mode, T _v, distributes to both _{A v (H-535, H} -540) is, when the A mode and correcting the shutter speed _{T v (H-550, H} -560) In the case of the S mode, the aperture value _Av is corrected (H-565, H-570).

The TV is obtained by the control shutter speed (TVc) + the correction amount (ΔTV), and it is determined whether or not this TV exceeds TVmax. In the case of exceeding, the amount ΔTV = TV−TVmax is determined, and the correction amount is 2EV.
Is subtracted from this value to obtain ΔAV, which is fed back to the aperture, and is obtained by aperture value AV = AVc + ΔAV. This is AVm
It is determined whether or not ax is exceeded, and if so, the difference between the limit value and the control value (AVc) is set as ΔAV, ΔTV, and correction is made as much as possible.

On the other hand, when AV ≦ AVmax, ΔTV is obtained by TVmax−TVc.

When H = 580 and TV ≦ TVmax, the aperture value AV is obtained by adding the control aperture value AVc + correction value ΔAV. If AV ≦ AVmax, the aperture value (AV) after correction and the shutter speed are each limited. Return as not exceeding. When AV> AVmax, the difference ΔAV = AV−AVmax, and the correction amount 2−ΔA
ΔTV is obtained again by V, and TV = TVc + ΔTV of the correction number is obtained. When TV ≦ TV, ΔAV is determined as ΔAV = AVmax−AVc. On the other hand, when TV> TVmax, the process proceeds to H-605.

Next, FIG. 80 (b) shows the control in the case of the shadow, but the concept is described above only when the correction is on the (-) side (under side) and the limit value is _Avmin or _Tvmin . This is the same as the control for highlight.

FIG. 81 shows the display during data setting. In the normal display state (a), if the card setting key is kept on, the display changes to (b), and then the card setting key is turned off. (C). When the card key is turned on in the state of (c), the state becomes (d). When the card key is turned on again, the state returns to (c). That is, every time the card key is turned on (c)
And (d) are displayed alternately. Next, when the card setting key is turned on again, the display returns to the normal display (a).

 Next, the operation of the portrait card will be described.

(9) Portrait card When the portrait card is inserted into the camera, the portrait card executes the reset routine shown in FIG.
M) are all reset (P-5), and sleep.

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the card, the card executes an interrupt shown in FIG. Here, the card performs serial communication once in synchronization with a clock sent from the camera to input data indicating the type of communication.

From the data from this communication, the type is determined (P-
20) In the case of communication (I), the card is set to the data input side (P-25), serial communication is performed (P-30), and data (see CACD table) is received from the camera. A data setting subroutine is executed based on this data (P-35).
Go to sleep.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using a portrait card table.

In communication (II): • Auxiliary light prohibited (= 1) CS II-1-b ₀ • FL forced ON (= 1) CS II-1-b ₁ • GN restriction released (= 1) CS II-1-b _3. Whether or not the card controls the display CS II-1-b _4. ON / OFF of the card function CS II-1-b _{5. With} / without camera shake buzzer CS II-1-b _7. P-shift prohibited ( = 1) CS II-2-b ₀ · Forced P mode CS II-2-b ₁ · No Vth communication (= 0) CS II-2-b ₂ · AF one shot (= 1) CS II-2- b ₆ • Forced AF (= 1) CS II-3-b ₁ • _Tv , _Av / Display data CS II-3-b ₃ • IV communication Yes (= 1) CS II-3-b ₄ • III Communication Yes (= 1) CS II-3-b ₅ • Group designation (= 0) CS II-3-b ₆ • Photometry loop repetition CS II-3-b ₇ • Camera shake buzzer control (= 1) CS II- 4-b _{0 In} the above, the AF one-shot means prohibiting the AF following mode after focusing by the camera.

All signals other than the above are set to "0". From the table, the * mark sets "1" or "0" according to the time, and when "1", the control is ON, and when "0", the control is OFF. "0" and "1" are determined for fixed items. Communication (II)
Then, in order to designate group 1 of communication (III) in group communication, CS II-9-b ₁ = 1 and communication (IV) is two of display and control data. ₁ , b ₂ =
1, 1 and others are “0”.

Where there is nothing written, any data may be included.

In communication (VI), a sleep enable signal is sent. This is because there is no write control to the E ² PROM.

The data setting subroutine is described with reference to FIG. 84 (a). In step (P-150), the display control data is initially set to "0", and the flow advances to step (P-160).
In this step (P-160), the DISRE obtained in communication (I)
It is determined whether or not the Q (card name display request) signal is “1”. If the signal is “1”, the display control data is set to “1” and the card display function ON / OFF is turned ON (1 ) (P-170 to P-185). It is determined whether or not the flag (SIF) is set (P-200). If the flag is not set, this flag is set for the first time (P-205), and the timer is reset and started. (P-210), and proceeds to step (P-215). When the flag (SIF) is set, the step (P-2)
Proceeding to 15), in step (P-215), it is determined whether the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, set the photometry loop repetition signal to "1" (P-22)
Along with 0), a card display name and data for performing only card display are set (P-222), and the routine returns. This display is shown in FIG. On the other hand, if 10 seconds have elapsed, the photometry loop repetition signal is set to “0”, the flag (SIF) is reset (P-226), and the display control data is set to “0” (P
-227), and return.

When DISREQ = 0 in step (P-160), IP ₅ =
It is determined whether or not it is "L" ( _SEM , S _FUN , S _CD , S _CDS , S ₁ is ON) (P-162). When "L", the card name is displayed. The display flag (display F) is reset, and if it is not "L", nothing is performed and step (P-16)
Proceed to 5) to reset the flag (SIF). Thereafter, the flow advances to step (P-260) in FIG. 84 (b), and it is determined whether the self signal obtained in communication (II) is “1”.

When the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). If the self signal is not "1", the step (P-
Proceeding to 430), it is determined whether the card switch (S _CD ) is ON or not. When the card switch (S _CD ) is OFF, this flag (S _CD F) is reset (P-460). It is determined whether or not the display flag (display F) is set (P-465), and if not, the process returns.
If set, go to step (P-170)
Controls the display of card names. When the card switch (S _CD) is ON at step (P-430), whether or not the flag (S _CD F) is set indicating that through which is determined in the step (P-435), set If the switch has been operated, it is determined that the switch is kept being operated, and the step (P-46)
Proceed to 5). If it is not set, it is reset (P-440), and it is determined in the next step (P-445) whether or not the card function is currently ON. If it is ON, it is OFF (Communication II (P-450). If it is OFF, turn it ON (communication II data)
Then, the process proceeds to step (P-170) to perform display control of the card name.

Returning to FIG. 83, if it is not communication (I), it is determined whether or not it is communication (II) (P-40). If it is communication (II), a card for outputting the set data to the camera is set. Is the output side, and serial communication is performed 10 times (P-50) to sleep.

If it is not communication (II), it is determined whether it is communication (III) or not (P-51). If it is communication (III), the card side is input (P-52) and serial communication is performed 15 times T (P
-53) Enter the camera data and proceed to the next step (P-5)
In 4), calculate data (including exposure calculation) for controlling the camera and sleep. This calculation will be described later.
If it is not communication (III), it is determined whether it is communication (IV) or not (P-55). If it is communication (IV), the card is set to the output side (P-60) and it is determined whether display control is performed. (P-6
5) If display control is performed, display data is output (P-70), and an address is set to perform serial communication.
(P-75) to sleep. When the display control is not performed (Tv, Av data), the address of the data of Tv, Av is designated, serial communication is performed four times (P-85), and then sleep.

If the communication is not the communication (IV), the communication is determined to be the communication (VI). First, the card is set as the output side, and serial communication is performed according to the clock from the camera (P-125) to sleep.

The operation control in the step (P-54) in FIG. 83 will be described with reference to FIGS. 86 (a) and 86 (b). First, in FIG. 86 (A), a reference value of a shutter speed for sounding a camera shake warning buzzer is provided. Calculate _TVH .

Longer focal length lenses tend to cause camera shake even at higher shutter speeds, so longer focal lengths increase _TVH .

In (B), _TVH is obtained in the same manner as in (A). When f <50 mm, _TVH is calculated by changing the level at which the camera shake Bz is sounded.
This is to warn if Tv becomes extremely slow even with a wide-angle lens.

In (C), the camera shake warning buzzer Bz sounds at an extremely slow shutter even if the focal length f of the lens is short, and conversely f
To limit the T _VH for is to not sounded camera shake warning buzzer Bz when the shutter speed is faster than a certain extent in the case a long time.

(D) shows the bending point of the diagram when the flash fires.
_Find T _vf .

When T _VH ≦ T _VX , the shutter speed at the time of flashing is set to the minimum speed T _{VH at} which no camera shake occurs. Thereby, exposure by natural light is performed, and the background is easily captured.

When T _VH > T _VX , set the shutter speed to the maximum tuning speed T _VX .

(E) When the flash switch is OFF, the aperture value A _v β is determined by β, considering the depth according to β from the image magnification β.

 When β> 1/100, β is reliable.

If β> 1/100, AVβ = AVoz (open F value), and AVx is AVβ.

, The aperture value AVβ is obtained from the image magnification β. On the other hand, β
When ≤ 1/100, the main subject is small and it is difficult to distinguish it from the background. Therefore, a control line independent of the image magnification is used. At this time, AVoz <3 → AVx = 33 3 ≦ AVoz <3.5 → AVx = AVoz 3.5 <AVoz ≦ 4 → AVx = 4 AVoz <4 → AVx = AVoz, and a lens with a small F-number should be slightly squeezed. Increase the depth a little so that the background is slightly blurred.

Exposure value (EVs) is calculated from BVs + SV, and the control limit value and EVs
Are compared, and when EVs exceeds the maximum control value (ADmax + TVmax), the maximum control value is set. When EVs is less than the minimum control value (AVmin + TVmin), the minimum control value is set. (F ') Find the shutter speed (TV) at the open F-number (AVoz),
If this is less than TV _H , set the control shutter speed (TVc) to TV
The control aperture value (AVc) is set to AVoz, the shutter speed is increased as much as possible, and the process proceeds to the camera shake determination. Calculation TV is TV
_{When H is} greater than or equal to _H , the calculation is performed using AV = EVs−TVH,
<When a AVX, control aperture value (AVc) AV, a control shutter speed (TVc) the TV _H, as possible control aperture value AV
approaching x.

When AV ≧ AVx, TV is obtained by EVs−AVx, and TV <TVmax
Then, the control aperture value (AVc) is set to AVx, and the control shutter speed (TVc) is set to TV. If TV ≦ TVmax, the control shutter speed (TVc) is set to TVmax, and the control aperture value (AVc) is set to EVs−
Recalculate with TVmax, and proceed to each camera shake judgment.

When the camera shake (ie, shutter speed TVc found the TV _H
When) to perform the camera shake warning, less set signal _{(S II-1-b 7} ) to one communication (II), when not camera shake, set the signal _{(S II-1-b 7} ) to 0 I do. Then, the bit (b ₀ ) of the communication (IV) signal CTRLB is set to 0, and flash light emission is inhibited.

 Next, control of the flash will be described.

When the spot key is ON (AEL = 1), it is determined whether or not the previous calculation of the spot key has been performed. When the previous calculation of the spot key has been performed, the previous control aperture value (AVc) is determined. using a control shutter speed (TVc) and proceeds to the flash light calculation (F ₁ ~F _3). If the spot key is not ON, or if the calculation of the spot key ON has not been performed last time, the exposure value (EVA) is calculated from the background luminance (BVA) (F-4).

This exposure value (EVA) depends on the tuning speed (TVX) and the open F value (AV
oz) +1.5 or less and the main subject exposure value (EVs) is equal to or less than the tuning speed and the open F-number-1.0, it is determined that both the background and the main subject are dark. And the spot key is ON
The control aperture value (AVc) is set to AVD when the switch is not turned on, the main subject is appropriately exposed to the flash light, and the depth of field is saved to some extent. Then, the control shutter speed (TVc) is set as the tuning tuning speed, and the process proceeds to the light control calculation.

Exposure value of the background (EVA) is EVA> TVx + AVoz Alternatively, when the main subject exposure value (EVS) is the EVS> TVx + AVoz-2 or spot key ON, the determination whether ΔBV (BV _A -BVs) is 2.5 or more, 2.5 or more , The exposure control value is set to EVA-1
The main subject is properly exposed with flash light with the background being over. When the value is less than 2.5, it is determined that the subject is not in a backlight state, the background is set to one step lower, and the background and the main subject are appropriately exposed with natural light and background light. (F-9) It is determined whether or not the shutter speed at the open F-number (AVoz) is equal to or higher than the tuning speed. If the shutter speed is higher than the tuning speed, the control shutter speed (TVc) is set to the tuning speed (TVx). The value (AV) is obtained from EVc-AVx, and it is determined whether or not the aperture value (AV) is equal to or larger than AVD. When the aperture value (AV) is equal to or larger than AVD, the control aperture value (AVc) is set to AVD, whereby the main subject is underexposed. Is preventing.

When AV <AVD, the control aperture value (AVc) is set to AV. Then, the flash dimming level is calculated. In F-12
When TV <TVx, release the control aperture value (AVc) to the open F value (AVoz)
It is determined whether or not the TV is equal to or greater than the minimum shutter speed (TVmin). If the TV shutter speed is equal to or greater than the minimum shutter speed (TVc), the control shutter speed (TVc) is set to TV.
The process proceeds to the flash dimming level calculation as n.

 The dimming calculation is the same as that of the auto depth card.

 Next, the operation of the defocusing card will be described.

The defocusing card has a soft focus effect and a zoom effect during exposure by driving a focusing lens during exposure.

(10) Defocusing card When the defocusing card is attached to the camera,
The reset routine shown in FIG. 90 is executed to reset all the flags and the register (RAM) (F-5) and sleep.

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the card, the card executes an interrupt shown in FIG. The card performs serial communication once to input data indicating the type of communication in synchronization with the clock sent from the camera (F-15).

From the data from this communication, the type is determined (F-
20) If it is communication (I), the card is set to the data input side (F-25), serial communication is performed (F-30), and data (see CACD table) is received from the camera. A data setting subroutine is executed based on this data (F-3).
5), sleep.

Before explaining the above subroutine, what kind of data is output from the card in response to the communication is
This will be described using a defocusing card table.

In communication (II): ・ FL forced OFF CS II-1-b ₂・ Whether the card performs display control CS II-1-b ₄・ ON / OFF of card function CS II-1-b ₅・ Camera shake No buzzer (= 0) CS II-1-b ₇ • P shift prohibited (= 1) CS II-2-b ₀ • Forced P mode (= 1) CS II-2-b ₁ • No V-th communication (= 0) CS II-2-b ₃ · Release prohibited CS II-2-b ₄ · AF one shot (= 1) CS II-2-b ₆ The one shot here follows the camera after focusing. By prohibiting the mode, the camera inputs this signal to prohibit the following mode.

• Forced AF (= 1) CS II-3-b ₁ • _Tv • _Av / Display data CS II-3-b ₃ • IV communication available (= 1) CS II-3-b ₄ • III communication Yes (= 1) CS II-3-b ₅ · Group designation (= 0) CS II-3-b ₆ · Photometry loop repetition CS II-3-b ₇ · Camera shake buzzer control (= 1) CS II-4- b ₀ · Defocusing (= 1) CS II-4-b ₃ · 10msec extension (= 1) CS II-4-b ₄ b ₃ = 1 only when each is a defocusing card
Becomes

This signal is sent for the extension of 10 msec because the time required for the operation after communication (III) with this card becomes longer.

All signals other than the above are set to "0". From the table, the * mark sets "1" or "0" according to the time, and when "1", the control is ON, and when "0", the control is OFF. "0" and "1" are determined for fixed items. Communication (II)
Then, in order to specify the groups G ₀ , G ₁ , and G ₃ of the communication (III) in the communication (IV), CS II-9-
Since b ₀ , b ₁ , b ₂ , b ₃ = ₁ , ₁ , ₀ , ₁ , communication (IV) is _three of display control data and lens drive data, CS II-10-b ₁ ,
b ₂ , b ₃ = 1, 1, 1, otherwise, “0”.

In the above table, any data may be entered where nothing is written.

In communication (IV), a sleep enable signal is sent. This is because there is no write control to the E ² PROM. Next, the data setting subroutine will be described with reference to FIG. 92 (a). First, in steps (F-146) and (F-147), the display control data is set to "0" and release inhibition is inhibited (= 0). , And the communication (I) in the next step (F-160).
DISREQ (request to display card name) signal obtained in step 1
The display control data is set to "1" and the card display function ON / OFF is set to ON (1) (F-170, F-175). Subsequently, it is determined whether or not the flag (SIF) is set (F-200). If the flag (SIF) is not set, this flag (SIF) is set for the first time as this flow passes (F-205), and the timer is set. Is reset and the process proceeds to step (F-210) and step (F-215). When the flag (SIF) is set, the process proceeds to step (F-215). In step (F-215), it is determined whether or not the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, the photometry loop repetition signal is set to "1" (F-220), and a card display name and data for performing only card display are set (F-222).
To return. This display is shown in FIG. On the other hand, if 10 seconds have elapsed, the photometry loop repetition signal is set to 0, the flag (SIF) is reset (F-226), the display control data is set to "0" (F-227), and the routine returns. Step When (F-160) in DISREQ = 0, IP ₅ = "L" (S _EM, S
_FUN , S _CD , S _CDS , or S ₁ is ON) (F-162). When the flag is "L", a display flag (display F) indicating control for displaying a card name is set. Reset (F-16
3) If not "L", do nothing and proceed to step (F-165) to reset flag (SIF). It is determined whether the self signal obtained in communication (II) is "1" (F-165, F-260).

When the value is "1", the process returns to prohibit the control by the operation of the switch of the camera (related to the card). After a while
Proceeding to the step (F-260) in FIG. 92 (b), when the self signal is not "1", the step (F-260) in FIG.
Advances to -430), determines whether the card switch (S _CD) is turned ON, the card switch (S _CD) resets the flag (S _CD F) when the OFF (F-460), followed by Then, it is determined whether or not the display flag (display F) is set (F-462). If not, the process returns. If not set, step (F-170)
To control the display of the card name. Step (F-
When the card switch (S _CD ) is ON in step 430), it is determined in step (F-435) whether or not the flag (S _CD F) indicating that the card has passed through is set. , Assuming that the switch is being operated,
-462). If it is not set, it is reset (F-440), and it is determined in the next step (F-445) whether or not the card function is currently ON. (F-4)
51), return. If it is OFF, it is set to ONF (communication (II) data) (F-455), and step (F-1)
Go to 70) to perform display control of the card name.

Returning to Fig. 91, when communication is not (I), communication (II)
(F-40), and when the communication is (II), the card side is set as the output side to output the set data to the camera (F-45), and the serial communication is performed 10 times. (F-50) and sleep.

If it is not communication (II), it is determined whether it is communication (III) or not (F-51). If it is communication (II), the card side is input (F-52) and serial communication is performed 19 times. (F-
53) The camera data is input, the data for controlling the camera is calculated (including the exposure calculation) (F-54), and the computer goes to sleep. If it is not communication (III), it is determined whether it is communication (IV) or not (F-55). If it is communication (IV), the data is set to the output side (F-60) and it is determined whether display control is performed. Then, in the case of display control (F-65), display data is output (F-70), an address is set, serial communication is performed 9 times (F-75), and sleep is performed.

When the display control is not performed ( _Tv / _Av data), the address of the _Tv / _Av data is specified, and the serial communication is performed five times (F
-85) Sleep.

If the communication is not the communication (IV), it is determined that the communication is the communication (VI). First, the data output side is performed (F-120), the serial communication is performed according to the clock from the camera (F-125), and the sleep is performed.

Next, the arithmetic control in step (F-54) in FIG. 91 will be described with reference to FIG.

First, reset the Soft Flag and Zoom Flag respectively,
In the step, Lpmin = | Lpmax |-| ΔLp | is obtained by subtracting the absolute value | ΔLp | of the lens extension from the current ∞ position from the absolute value | Lpmax | of the maximum extension of the lens input from the camera.

Then, the shutter speed corresponding to the time required to extend Lpmin (the shutter speed is only 3/4 of the shutter speed (exposure time), so the shutter speed determined in consideration of this) is changed from the start of motor rotation to the shutter speed. The elapsed time and the amount of rotation of the motor (the number of pulses from the encoder) are obtained from FIG. 95 (FIG. 95 is a ROM table using the number of rotations as an address). And what I asked for was T
Close to _VLIM .

Then, in the same manner as in, the time required for the retraction to ∞ is obtained from the retraction amount ΔLp from the current lens position to ∞, and is set to T _VLIM .

Shown in, for Nege ... negative film, as to allow to 3E _v over because Rachiichudo is wide, it
KF is set to 3.

Posi: In the case of a positive film, the latitude is set to 0 because the latitude is narrow.

And, (39) the - (41), and the shortest time of the control shutter speed T _v = 3 (open F value and is obtained from the KF), because T _v> is not 3 or more if the effect proceeds to (A) , Display data is set, release prohibition is set (= 1), and display data creation and display control of only blinking of the card mark = 1 is returned.

Then, the limit value of T _v is determined. The smaller of the TV _LIM near and the TV _LIM far is set as TV, and when TV ≧ 0, TV _DOWN = TV, and when it is smaller than TV, TV = 0 (SS = 1S).

Now, to determine the _{E v ≦ T v DOWN + A} v0 + KF, If YES,
When the lens is driven, the end of the lens (top or back)
Since the close-up effect cannot be obtained, the process also proceeds to (A), and the warning and the release lock are controlled.

In this case, it is assumed that the maximum speed limit (T _v ) = 3.

Then, it is determined whether T _v ≧ T _{v DOWN} , and when T _v <T _{v DOWN} , it proceeds to the change limit of T _v (described later), and it is determined whether there is a soft effect or a zoom effect. I do.

Then, K is initially set to K = 0, which indicates the amount of deviation from proper exposure.

Then, it is determined whether or not the above K is the limit of the latitude. When exceeding the limit (KF = 3 for negative film and KF = 0 for positive film), the shutter speed (Tv) is set to under 0.5 Ev, and the defocus amount obtained by is increased to about 1.5 times.

Then, when the value is within the range of the latitude, the aperture value is calculated.

Then, it is determined whether or not the aperture value is equal to or less than the maximum aperture value. Then add 1 to K and go to. As a result, the aperture value is opened to the open side in the range of latitude, and is set within the maximum aperture value.

When the aperture value is less than the maximum aperture value (A _v ≦ A
_vmax) to determine whether the open F value or more, the process proceeds to 42 is smaller than the open F value is calculated so as to control the open F value than the aperture the aperture further pulling the 0.5 T _v.

In FIG. 96, the number of rotations (the number of pulses from the encoder) that moves from the shutter speed for 3/4 of the time is shown. A graph of the number of rotations (N) against the shutter speed time (however, this is a
M table). And to this K
The defocus DF is obtained by multiplying the BL value (DF = N × KBL).

Then, the aperture value is changed to F _NO , and the circle of confusion δ is changed to DF / F _NO
Ask for. _{Here, T v, A v (→} F NO) for DF, is a change in the F _NO, the T _v changes 1E _v, time move the motor is doubled. On the other hand, if A _v changes 1E _v, F _NO is It changes twice.

In, it is determined whether or not there is a zoom effect.
It is determined whether or not the shutter speed (T _v ) obtained through is longer than the longest time (T _VLim far) required to extend in the ∞ direction that is driven when a zoom effect is exhibited, and T _VLim
When the distance is less than the distance, it is determined that no effect is obtained, and the process proceeds to (21 ′).

Then, when (T _v ) is greater than or _equal to T _VLim, it is determined whether or not a flag (Zoom FLag) indicating that there is a zoom effect is already set. If so, T _v , A _v
Is set, and the process proceeds to (21 ′). In (18 '), Zoom
When FLag is not set, it is determined whether or not there is a zoom effect. The zoom effect is caused by a change in image magnification due to defocusing. Now, focusing on the point of the image height h ′ (12 mm) with the whole extension lens, the image height change (ΔL ₁ ) at this point is At this time, if ΔL + δ / 2 ≧ 2 and ΔL / δ ≧ 3, it is determined that there is a zoom effect. The flag (effect F) is set and reset in accordance with the result of the above calculation (see FIG. 94).

Then, when the flag is set in accordance with the flag (with effect), the zoom flag is set, and Tv and Av are set to Tvz and Avz, respectively, and the process proceeds to (21 '). The process also proceeds to (21 ') when the effect flag is not set.

(21 ') to judge whether or not there is a soft effect. (21 ') in T _v is determined whether up whether it is time (T _vlim near) or more when moving the lens driving direction for performing a soft effect, when less than maximum time, the change of no more T _v Proceed to (A) as impossible.

At 3334, when it is close to T _VLim or more, the above obtained δ is 3000
It is determined whether the value is equal to or greater than μ, and if it is greater than or equal to (the effect is at a large level), the process proceeds to (C), and it is determined whether the value of f / 2F _NO is greater than or equal to the image height h ′ (= 6 mm) If this is the case, it is determined that there is an effect, and a positive predetermined value is put in ΔLp so that the lens drive is performed in the near side direction, and the process returns. h, go to 42, 42,
Repeat the flow from. Thus, by after adding 1 to K in the later, in the diaphragm is getting to open, and as small as possible F _NO, trying to increase the f / 2F _NO.

Then, it is determined whether or not 3000 μm> δ> 1500.

When δ> 1500, it is determined whether or not the flag (Soft FLag) indicating the soft effect has already been set, and the process proceeds to when it is set. And when the Soft Flag is not set, 1500
> Δ ≧ 800, and if it is within the above (effect level is small), a flag (Soft Flag) is set, and T _vs ,
Proceed to A _vs as T _v , A _v . When δ <800 μm, the process proceeds immediately.

Then, 1 is added to K to newly set K, and the process proceeds to. This attempts to open the aperture within the range of the latitude, and as a result, the values of δ and f / 2F _NO increase. In the case of a negative film, this effect does not exist.

Then, when 3000 μm> δ ≧ 1500 μm (the effect level), it is determined whether or not a flag (S _oft FLag) indicating a soft effect is set. When the flag is not set, the process proceeds to (C).

In, when set, to determine whether T _v ≧ 2 or more, when a small effect level when less than 2
T _v, by using the A _v proceed to (C). Thus, when the effect is small, the shutter speed is prevented from becoming too slow. Proceed to 2 or more times. This allows
You are trying to increase the effect level.

Now, in the flow of (B), when the shutter speed cannot be further reduced, it is first determined whether or not the soft flag (Soft FLag) is set, and it is not set. Proceed to time (D).

Then, when set, f / 2F _NO ≧ h (= 6mm)
It is determined whether or not f / 2F _NO <h, and the process proceeds to (D).

At 32, when f / 2F _NO ≧ h, T _v and _Av are used for soft effects.
Set T _vs , A _vs , set the lens drive direction at 33 and return.

In 35, in this embodiment, the soft effect is prioritized. When the soft effect cannot be obtained, it is determined whether or not there is a zoom effect. When there is no effect ( _Zoom FLag reset), 3
Proceed to 9 (description omitted).

When it is effective in 36 and 37 (Zoom FLag set),
T _v, A _v for the zoom T _vz, and A _vz, the lens driving direction far side (which negatively ΔLp), the process returns.

At 42, with a T _v to 0.5Ev under, as a new T _v.
As a result, the change in the DF amount caused by driving the lens is increased by 0.5 times.

Table 7 shows an example of a map of the RAM in the camera. If it is such a RAM (E ² PROM free) map, when group MP _1, MP _3, MP ₁₀ is required for data communication _{II (G 0, G 1,} G 2), there the complete group If MP ₁ , M
The head addresses and the numbers of P ₃ and MP ₁₀ are stored, and these may be written out according to the signal. These are compatible with existing card systems because they only read out fixed data. However, newly with other function cards are made, for example, the other data MP ₂ and M
If P ₃ is required, it is not possible to read the other data. In order to make this possible, it is necessary to directly specify the head address of data and the number thereof (direct addressing type). However, at that time, it is impossible to specify the data (e.g., data of MP ₂ of the data and MP ₇ only) of discrete, will be all the data up to MP ₂ to MP ₇ is specified, the data Transfers are wasted (memory and time). In the present embodiment, data transfer is performed efficiently by properly using these.

In this embodiment, the direct addressing is also performed after the relationship between the group-designated card and the camera has been established, and it is not possible to newly increase the group designation. Therefore, if the card and the camera are being designed at the same time, the direct address type card can also be designated as a group.

The signal for forcibly turning on or off the power of the electronic flash device may be set by an operation member of the camera body, but in the above embodiment, this signal is created by an IC card and sent to the camera body. It has become. That is,
As shown in Table 15, Table 17, and Table 20, the signal S II-1-b ₁ = 1 for instructing forced ON from the auto depth card, close-up card, and portrait card is the second communication (II)
And sent to the camera body in the same manner as in Tables 14 and 16.
Table, Table 18, Table 19, sports as shown in Table 21 card, bracket card, auto shift card, signals _{S II-1-b 2 H} / S card, from defocusing card for instructing the forced OFF = 1 is sent to the camera body.

In the camera body, it is determined in step (# 467-2) whether or not the camera is forcibly turned ON based on the data from this card.
Whether it is FF or not is determined in step (# 467-4).

Then, the steps (ス テ ッ プ 467-3) and (♯467-
The forced ON and forced OFF signals set in 5) are output in step (# 467-13) and sent to the electronic flash device (ST). The electronic flash device (ST) is forcibly turned on in steps (@ ST290) and (@ ST330) in FIG.
Forced OFF is determined, and if forced ON, step (ス テ ッ プ ST31
Start boosting at 0), step if forced OFF (♯ST440)
To stop boosting.

According to the present invention, since a signal for controlling the operation / non-operation of the booster circuit is sent from the camera body to the electronic flash device, power supply control according to the necessity of flash light emission can be performed, This is more practical than the conventional one in which the power supply is determined on the electronic flash device side. Therefore, unnecessary power is not consumed when light emission is unnecessary.

[Brief description of the drawings]

FIGS. 1A and 1B 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. It is a flowchart shown. FIG. 4A is a circuit diagram of a lens circuit, and FIG. 4B is a side view of the lens. FIG. 5 is a flowchart for data communication between a camera and a card or the like. FIG. 6 is a flowchart showing a routine for performing photometry, AF, display, exposure control, and the like, and FIG. 7 is a flowchart showing a routine for determining an AF mode and a focus lock therein. 8 (a) is a circuit diagram of the electronic flash device, FIG. 8 (b) is an explanatory diagram relating to the display, and FIGS. 8 (c) and 8 (d) are interrupt routines for the electronic flash device. FIG. 9 is a diagram showing an interface circuit of the electronic flash device. FIG. 10 is a flowchart of lens data input. FIG. 11A is a flowchart of flash data input, and FIG. 11B is a flowchart of flash data output. FIG. 12 (a) is a flowchart of AF, FIG. 12 (b), FIG.
FIG. 12 (c), FIG. 12 (d), FIG. 12 (e), FIG. 12 (f), FIG. 12 (g), FIG. It is a figure showing the example of a display in a finder about it. FIG. 14 is a diagram showing a distance measurement range and a photometry range in a shooting screen. FIG. 15 is a flowchart of data setting, FIG. 16 is a flowchart of exposure mode change, FIG. 17 is a flowchart of function mode selection, FIG. 18 is a flowchart of exposure correction,
FIG. 19 is a flowchart of self-service, FIG. 20 is a flowchart of photometric data creation, and FIG. 21 is a flowchart of AE lock. FIGS. 22 (a) and 22 (b) are flowcharts for setting the aperture and shutter speed. FIG. 23 is a flowchart of the exposure calculation, and FIGS. 24 (a), 24 (b), 24 (c), 25, 26 and 27 show the modes of each mode. It is a flowchart. FIG. 28 is a flowchart of control by an IC card. FIG. 29 (a) is a flow chart showing a display routine, FIG. 29 (b) is a flow chart showing the interruption routine, and FIGS. 29 (c), 29 (d) and 29 (e). ) Is a diagram showing a display example, and FIG. 29 (f) is a flowchart showing a mode setting routine. FIG. 30 is a flowchart of exposure control, FIGS. 30 (b) and 30 (c) are flowcharts of lens driving, and FIG. 30 (d) is a flowchart of shutter speed control.
FIGS. 31 (a) and 31 (b) are flow charts for winding one frame of film, and FIG. 32 is a flow chart showing an interruption routine for closing the back cover. 33, 34, and 35 are diagrams showing the operation flow of the custom card, FIG. 36 is a diagram showing the mode setting, and FIG. 37 is a diagram showing a display example. 38, 39, and 40 are diagrams showing an operation flow of the data memory card, and FIG. 41 is a diagram showing a display example thereof. 42, 43, 44, and 45 are diagrams showing the operation flow of the sports card, FIG. 46 is a diagram relating to the exposure setting, and FIG. 47 is a diagram showing a display example. 48, 49, 50 and 51 are diagrams showing the operation flow of the auto depth card, and FIG. 52 is a diagram showing a display example thereof, FIGS. 53, 54 and 55. FIG. FIG. 56, FIG. 57 and FIG. 58 are diagrams showing the operation flow of the bracket card, FIG. 59 is a diagram showing a display example thereof, FIG.
The figure shows the same operation flow, and FIG. 61 shows the display accompanying the setting. FIGS. 62, 63 and 64 show the operation flow of the close-up card, FIG. 65 shows a display example, FIG. 66 shows the same operation flow, FIGS. 67 and 68 FIG. 69, 70 and 71 are diagrams showing the operation flow of the auto shift card, FIG. 72 is a diagram showing a display example thereof, FIG. 73 is a diagram showing the same operation flow, FIGS. 74 and 75 FIG. FIGS. 76, 77 and 78 show the operation flow of the H / S card, FIG. 79 shows a display example thereof, FIG. 80 shows the same operation flow, and FIG. 81 shows the setting FIG. 82, 83, and 84 are diagrams showing the operation flow of the portrait card, FIG. 85 is a diagram showing a display example thereof, FIG. 86 is a diagram showing the same operation flow, FIG. 87, FIG. FIG. 89 and FIG. 89 are explanatory diagrams thereof. FIG. 90, FIG. 91, FIG. 92, FIG. 93 and FIG. 94 are diagrams showing the operation flow of the defocusing card, and FIG. 95, FIG. 96 and FIG.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masayasu Hirano 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Naohiro Kageyama Azuchi, Chuo-ku, Osaka-shi, Osaka 2-3-13, Machi-cho, Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Toshihiko Ishimura 2-3-3, Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka Kokusai Building Minolta Camera Co., Ltd. (72) Inventor Tsuji Kenji 2-3-13 Azuchicho, Chuo-ku, Osaka City, Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Hiroshi Otsuka 2-3-113, Azuchicho, Chuo-ku, Osaka City, Osaka Osaka International Building Minolta Camera Co., Ltd. In-company (56) References JP-A-62-115135 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB (Name) G03B 15/05

Claims (1)

(57) [Claims] 1. A camera system comprising a camera main body and an electronic flash device detachable from the camera main body, wherein the camera main body comprises: a power switch for turning on or off a power supply of the camera main body; Output means for outputting a signal for forcibly turning on or forcibly turning off the electronic flash device mounted on the camera body when the power is on, and transmitting information on the camera side for exchanging information with the electronic flash device. The electronic flash device comprises: an electronic flash device-side information transmitting unit for transmitting information to and from the information transmitting unit when the power switch on the camera body is turned on; and Input means for inputting an output signal of the electronic flash device, and forcibly turning on and off the electronic flash device based on the input signal.
Means for determining F, a booster circuit for boosting the output from the battery loaded in the electronic flash device, and booster control means for performing boost control of the booster circuit based on an output signal of the determiner. Characterized camera system.