JP2581222B2 - camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera with a bracket function.

2. Description of the Related Art In general, a camera shoots images with a predetermined exposure amount. However, in many cases, it is difficult to know the magnitude of a photograph based on the determined exposure amount without taking a photograph. Therefore, bracket shooting is performed in which a plurality of pictures are taken of the same subject while changing the exposure amount for each picture.

In general, when performing such bracket shooting, a conventional camera is configured to shoot from the most under exposure shift amount to the over exposure shift amount (or vice versa).

Problems to be Solved by the Invention By the way, in a portion where the number of remaining films attached to the camera is small, a situation may occur in which the set number of films for bracket shooting becomes larger than the remaining number of films, and bracket shooting is performed. Even if it is, the end of the film may be reached halfway, and bracket shooting may not be possible for the entire set number of sheets. In such a case, in the conventional bracket configuration, only the photographing with the exposure amount farther than the predetermined value is performed, and the photographing may not be performed with the exposure amount close to the predetermined value. The same result is obtained even when bracket shooting is forcibly terminated in the middle of the set number of images. However, in general, in any case, it is desirable that shooting is performed with an exposure amount close to a predetermined value.

An object of the present invention is to provide a camera that takes such points into consideration.

Means for Solving the Problems In order to achieve the above object, in the camera according to the first aspect, when the bracket function is automatically achieved, the amount of shift from the determined exposure level is increased while increasing the shift amount from the determined exposure level. It is characterized in that the shift and the shift to the under side are alternately performed for each frame.

In the camera of the second aspect, in automatically achieving the bracketing function, the first frame is shot at the determined exposure level, and the second and subsequent frames are shifted toward the over side and toward the under side. Are performed alternately for each frame.

Further, in the camera according to the third aspect, the shift to the over side and the shift to the under side are alternately performed for each frame while increasing the shift amount.

Operation According to such a configuration, even when the bracket shooting ends in the middle of the set number of images, it is possible to reliably obtain the bracket shooting from the one shot with the exposure amount close to the predetermined value. In addition, not only the over side and the over side which are close to the predetermined value, but also the over side and the under side can be obtained alternately, so that a photograph taken by shifting the predetermined value in both directions (over and under) can be evaluated. .

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 operations, 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, an A / D circuit, and an A / D conversion circuit. / D conversion and the microcomputer (μ
Output to C). (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, thereby enabling focus detection.

(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 a microcomputer (μC),
(AV _CT ) is an aperture control circuit that controls the aperture based on a control signal from a microcomputer (μC), and (MD) is a microcomputer (μC).
This is a motor control circuit for controlling film winding and rewinding based on the control signal from C). (BZ) is a buzzer that warns when the shutter speed reaches the speed at which camera shake occurs. (E) is a battery as a power supply, DC / DC is DC / DC for stabilizing the voltage (V _DD ) supplied to the microcomputer.
The converters (D ₁ ) to (D ₄ ) are a group of diodes for applying a voltage lower than the voltage (V _DD ) to the microcomputer when the DC / DC converter is off to reduce power consumption. Since the (μC) hardware can operate at this low voltage, an interrupt occurs, but the microcomputer (μC ₂ ) of the IC card (CD) cannot be driven 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, the switches will be described. (S _RE ) is a battery mounting switch that is turned off when a battery is mounted. When a battery is mounted and the switch (S _RE ) is turned off, a microcomputer (μC ) Terminal (RE) from “L” level to “H”
When the signal which changes to the level is applied, the microcomputer (μC) executes a reset routine described later.
(S _EM ) is a normally open push-type exposure mode change switch. The exposure mode is changed by the operation of this switch (S _EM ) and the operation of an up switch (S _up ) and a down switch (S _dn ) described later. You. (S _FUN ) is a normally open push-type function change switch. By operating this switch and operating the up switch (S _up ) or down switch (S _dn ), the function change (for example, switching between continuous shooting and single shooting) can be performed. Done. (S
_CD ) is a normally-open push-type card switch that is used when a normal card is mounted to enable / disable the function of the card or to change the data setting 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 ) performs preparation operations necessary for photographing such as photometry and AF operation. This switch is turned on at the first stroke of a release button (not shown). The above switch (S
Any one of _EM ), (S _FUN ), (S _CD ), (S _CDS ), and (S ₁ ) is operated, and if NO, 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 is turned on when the mirror up is completed, the shutter mechanism is charged, and turned off when the mirror is down.

(S ₂ ) is a release switch that is operated when performing a shooting operation, and is turned on by pressing a second stroke (deeper than the first stroke) of the release button. (S _WD ) is a one-frame switch that is turned on when one frame of the film is wound. (S
_AEL ) is a switch for performing AE lock (exposure lock), and is configured by a normally open push switch.
(S _{AF / M} ) is a focus adjustment mode switching status switch for switching between AF and manual focusing.

(S _SE ) is a normally open change data selection switch for selecting data to be changed. (S _SELF ) is a normally open push switch for setting a self mode when performing self-photographing. When this mode is set and the release switch (S ₂ ) is turned on, self-photographing is started (S _SELF ).
_AU ) 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 _AU ) 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 for detecting whether or not a film is loaded, which is disposed on a film rail surface near the spool chamber and which is turned off when a film is present. ( _SRC ) 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 an IC that turns off when the IC card (CD) is inserted
A card mounting switch that resets the microcomputer (μC ₂ ) of the IC card (CD) when turned off.
(X) is a so-called X contact, which is turned on when one shutter travel is completed, and turned off when the release member (not shown) is charged.

(S _up ) is a normally open up switch for switching or adding data to be changed, and (S _du ) is a normally open down switch for subtraction. When the aperture value is changed in the M mode, the aperture value change switch (S _AU ) is turned ON, (S _up ) and (S _dn ) are operated to increase or decrease the aperture value, and the aperture change switch is turned OFF and (S _up ). , (S _dn ) perform the functions of _{increasing and decreasing the} shutter speed, respectively. The operation of the up switch (S _up ) and the down switch (S _du ) 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 is used to select the functions (controllable functions) of the camera that are necessary for the photographer (delete unnecessary ones) or to select the functions The aim is to provide a camera according to the intention of the photographer and the 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, (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 included as a basis, and a combination of the remaining three modes (A, M, and S modes) 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. 2C. During exposure, the display of the selected one exposure mode is performed (FIG. 2 (a) (A mode selection)). The dots around the characters (or numerical values) indicate blinking. Details will be described later. The gold display is shown in FIG. 2 (a) for reference.

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

The relationship by the operation of the lens-side switch of (iii) is what kind of 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) Continuous AF is available. When setting, (CuSt-
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. By inserting this card (one of H / S selection) and operating the AE lock switch It is done.

(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, and a signal that changes from “L” level to “H” level is input to the terminal (RE) and the DC / DC converter is turned on.
N (PWO = “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). At the time of interruption, the DC / DC converter is turned on and the clock is started automatically by a hardware circuit. 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). As a result, the exposure mode is set to the P mode, the spot / multipoint AF is set to the multipoint AF mode, the single shooting (S) and the continuous shooting (C) are set to the single shooting (S), and a mode in which no exposure correction is performed and others are set.

Next, at step (# 115), the number of films (N ₁ ) and the film sensitivity (S _v ) stored in the E ² PROM are read and transferred to a predetermined RAM. Thereafter, it is determined whether or not the main switch (S _M ) is ON (# 120).
If the main switch is off, (IP ₆ =
"H"), the flow proceeds to step (# 125), the transistor for feeding the (Tr ₁₎ and OFF (PW = "L"), performs data communication with the card and the serial data (VI).

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”), and 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. By performing this eight times (8 bits), one data transfer is completed. By performing this as needed, necessary data can be obtained. Data communication with lens (LE), data communication with display control circuit (DISPC), electronic flash device (S
The same applies to data communication with T).

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, the terminal (CSCD) is set 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 card (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).

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, whether an interrupt or by ON of the switch (S _M) determined in step (# 147), if not an interrupt by the ON (IP ₆ = "H") is to disable interrupts the [INT _1] ( #twenty four
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, in step (# 147), the main switch (S _M ) is
If N, the interrupt of [INT ₁ ] is permitted in step (# 150), and display data is set (standby display) in the next step (# 155), and the display microcomputer and the step (# 160) are set. ) To exchange data. 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 , S _CDS , S ₁
It is determined in step (# 170) whether or not any one of them is ON. If not, the process proceeds to step (# 125) to perform the above-described sleep control. If "L" level, the step (# 180) was willing power held in the flag is set (OPF) for performing 5 seconds, executes the subroutine to be described later [S ₁ ON] (# 190). Next, the terminal (I
P ₅₎ determines whether 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 PN via inverter (IN ₁ )
And ON the transistor (Tr ₁₎ by applying base a low level of P-type transistor (Tr _1), photometric circuit (LM), supplying power to the AF circuit (AF _CT) and the like. Next, input information specific to the interchangeable lens from the lens circuit (LE) (#
410). This is shown in FIG. 10 and explained. First, the terminal (C
SLE) 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. Switch (S _Q )
Is a lens-side switch provided on the lens (10) (fourth
(Refer to FIG. 2B.) Also in this case, the address must be changed because the data must be changed. The address set in this way is output to the ROM (6). The ROM (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 includes the lens mounting signal, lens open aperture value (A _vo ), maximum lens aperture value (A _vmax ), _{絞 り} The table includes focal length information, (lens drive amount / defocus amount) conversion coefficient, ON / OFF of the lens side switch (S _Q ), whether or not the lens can be driven (LOK). Is input to the RAM at the address in the body shown in FIG. This signal (LOK)
Is changed from "1" to "0" in response to a state where AF cannot be performed. The camera body receives this signal to stop the motor.

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 is two more 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
By increasing the 2-byte of 06 _H, 08 _H as shown in 0 Table, OFF of the lens-side switch (S _Q), it is sufficient to select a change the address 06 _H, 08 _H in accordance with the ON . 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, the lens-side switch (S _Q ) is OFF
In case of, either of 06 _H and either of 07 _H , 08 _H
16 _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 function of the switch (S _Q ) is attached to an old camera that does not read this bit (because of new data), the function of the lens side switch (S _Q ) is maintained. (However, the function change by the IC card --- of the focus lock, continuous, and 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 assumed to be a lens that can not perform AF, prohibiting AF operation and only focus detection I do. To do this, in the ninth table when said switch (S _Q) is ON B, when the tenth Table 07 _H, 08 _H, and the switch (S _Q) is OFF in Table 9 A, 0 in Table 10
6 _H and either 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) of FIG. 5 (f) described above, except that data indicating that there is communication (I) data is set and output as data.
The subsequent 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) a pulse that indicates the type of serial communication from the camera body. This detection circuit detects the width and outputs a signal indicating the type of communication to the microcomputer (μC ₃ ). (D / D) is a booster circuit that converts a low voltage to a high voltage, and starts boosting with a signal from the microcomputer (μC ₃ ).
Perform a stop. (D ₂ ) is a rectifier diode, (CM) is a main capacitor that stores energy from the booster circuit,
(LEC) is a light emission control circuit for controlling light emission, and (DISP) is a display circuit. As shown in FIG. 8 (b), the power is turned on (a state in which boosting and data communication with the camera can be performed by a signal).
The display indicates whether the display is ON when ON, and nothing is displayed when OFF. (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 that monitors the amount of light emission itself.
Output a signal. (L _O ) is a normally open switch that switches the light emission amount between 1/4 and full light emission.
Every time, it switches to 1/4 full light 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, a signal that changes from “H” (the terminal is pulled up internally) to “L” is input to the microcomputer (μC ₃ ), and the microcomputer (μC ₃ )
C ₃₎ to take an interrupt, the microcomputer ([mu] C ₃₎ executes the flowchart shown in Figure No. 8 (c). In this flowchart, first, a flag (ON
It is determined whether or not F) is set (# ST10).
When it is set (ONF = 1), the terminal (OP ₂ ) is set to “L” level to reset the flag and stop the boosting, the ON display is turned off, and the sleep is performed (# ST20 to # ST4).
0). When the above flag (ONF) is not set,
A flag (ONF) is set as an operation from power OFF to power ON, and the terminal (OP ₂ ) is set to “H” level to start boosting (# ST50, # ST60). And display ON (# ST7
0). Next, reset and start the timer (# ST80)
Wait for 5 minutes to pass (# ST90), and after 5 minutes,
Proceed to (# ST20) to perform the same control as power OFF and sleep.

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 of pulse width (T ₁ ) is sent from the camera, the detection circuit (TM) detects this time (T ₁ ), and the (INT ₁ ) terminal of the microcomputer (μC ₃ ) And outputs a signal that changes from "L" to "H" level. Microcomputer (μ
C ₃ ) receives this change signal and performs [INT ₁ ] interrupt processing.

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 the “H” level, sets all outputs of the timer to the “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), switch (# ST140) terminal (OP
₂ ) is set to "H" level and the process proceeds to step (# ST180).
On the other hand, if 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 _O ) is turned on. When the signal is turned on (IP = “L”), a flag indicating this limit (L _O LMTF) It is determined whether or not is set (# ST181, # ST182). When it is set, this is set, the terminal (OP ₄ ) is set to “L” level, and the emission stop signal from the monitor circuit (MONT) is inhibited from being input to the emission control circuit (# ST183, # ST184). .

Set this when the flag (L _O 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, to # ST187). If the switch (L _O ) 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 above bit (STS ₁ ) and the 5-bit signal indicating the guide number corresponding to the electronic flash device (ST) are set (#ST
200), data communication clock (SCK) from camera body
When the clock (SCK) is transmitted, the control of communication for outputting data through the terminal (S _out ) and the input / output switching circuit (I / OCC) in synchronization with the clock (SCK) is performed. Perform (# ST210). When this is completed, the terminal (OP ₁ ) becomes “L”
The level is set (# ST220), and the timer is reset so that 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 proceeds from step (# ST230) to (# ST240).

In step (# ST240), the terminal (O
P ₁ ) is set to “H” level, and the terminal (I /
OC) 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) and read into a predetermined register (RAM). (# ST26
0, # ST270). Then, the terminal (OP ₁ ) is set to “L” level so that pulses from the camera can be received (#
ST280). As input data, a signal indicating whether or not light emission is present, whether or not power supply is forcibly turned OFF, and whether or not power supply is forcibly turned ON or not is 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 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. When forced OFF, the microcomputer (μC ₃ ) turns off the ON display, resets the power-off flag (ONF), and sets the terminal (OP ₂ ) to “L”.
Level to stop boosting and sleep (# ST420 ~
# ST440). On the other hand, if not forced OFF, step (#ST
Proceeding to 340), 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 five minutes have not elapsed, it is determined whether or not exposure control has been entered (# ST360). If not, control returns to step (# ST350) and step (# ST350)
And (# ST360) are repeated. 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 ). Detection circuit (TM)
Detects this and sets the terminal (EC) to the “H” level.
When this signal is input, the microcomputer (μC ₃ ) resets and starts the timer (# ST370). Based on the signal indicating the presence / absence of light emission sent from the camera, a terminal (OP ₃ ) is set to “H” level (# ST400), and when no light emission is indicated, the terminal (OP ₃ ) is set to “L” level.
Proceed to step (# ST412). This step (# ST4
In (12), the terminal (OP ₁ ) is set to “L” after waiting for a time (150 msec) from the ON of the switch (S ₂ ) to the completion of traveling of the front curtain of the shutter + α (light emission time of the electronic flash device) (#ST
415) so that it can process even if an interrupt pulse from the camera comes in, the switch (# ST8) shown in FIG.
Go to 0).

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. The microcomputer (μ
C ₃ ) sets the terminal (OP ₃ ) to “H” / “L”.

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

A signal (CSST) indicating the type of data communication (the pulse width changes according to the type) to the electronic flash device (ST), a clock (SCK) at the time of communication, and a signal indicating dimming completion are provided by an OR circuit (OR _21). ) To the electronic flash device (ST). 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 to the input side, and the electronic flash unit waits for data setting, and performs data input once by serial communication (# 650 to # 655).

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-described lens-side switch (S _Q ) is ON (# 40).
0). If this switch is ON, the flag (OPF) is set in step (# 4005) to reset and start the power holding time (starting from 10 seconds), and the data communication (II) (described later) 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 focus lock bit (Fb ₁₄ ) by the switch (S _Q ) is set, the bit (Fb ₁₃ ) indicating the auxiliary light mode is reset, and the follow-up mode is displayed. 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). Here, in the case of spot AF, it is determined in step (# 4036) whether or not the switch (S _Q ) is turned on and the flag (SQONF) indicating that the flow has passed this flow is set for the first time. If not, the process proceeds to step (# 4037), and the bit (Fb ₂ ) is stored to store the multipoint / spot mode before the switch (S _Q ) is turned on.
Is transferred to the bit (Fb ₁₅ ) and the above flag (SQONF)
Is reset (# 4038), the spot mode is set in step (# 4040) (Fb ₂ = 1), and the process proceeds to step (# 4045). If the flag (SQONF) is set,
Skip the step (# 4037) and the like and skip the step (# 404
Proceed to 5). In step (# 4045), Continuous A
It is determined whether it is F or not. If it is continuous AF, a bit (Fb ₈ = 1) indicating this is set (# 405).
0), the bit (Fb ₁₃ ) indicating the auxiliary light is stepped (# 405)
Reset by 5) and return. Now Continuous A
The auxiliary light mode for F is prohibited in consideration of power saving. In continuous AF, where focus adjustment does not end, the auxiliary light is emitted every time focus detection (integration) is performed, so the battery that is the power supply is quickly consumed and the number of films that can be shot decreases. It is. If it is not continuous AF in step (# 4045), the routine immediately returns. In the flow when the switch (S _Q ) is ON, only one of focus lock, spot AF, and continuous AF is set in the IC card. For example, in step (# 4010), If the focus is locked, both of the steps (# 4035) and (# 4045) become NO.

Switch (S _Q ) on the lens side in the above step (# 4000)
If is OFF, proceed to step (# 4060). In the step (# 4060), it resets the bit (Fb ₁₄₎ showing the focus lock function.

Switch (S _Q) spot AF is selected by, the switch (S _Q) and immediately post-control OFF is whether flags (SQONF) is determined by whether it is set (# 406
Five). When set, by shifting the content of bit (b ₁₅ ) to bit (b ₂ ), multiple points / spots before selection of spot AF by switch ( _SQ ) are obtained (#
4070). Then, the flag (SQONF) is reset, and the process proceeds to step (# 4087). When the flag (SQONF) is not set in step (# 4065), it is determined whether or not forced spot AF using an IC card (close-up card) is performed.
In the case of forced spot AF, a bit (Fb ₂ ) is set to indicate spot AF, and the flow advances to step (# 4087). If not forced spot AF, skip step (# 4085) and proceed to step (# 4087). Next step (# 40
In step 87), 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 (Fb ₈ ) indicating this is set. The bit (Fb ₁₃ ) is reset to prohibit the auxiliary light mode, and the routine returns (# 408)
8, # 4089). If not forced continuous, reset bit (Fb ₈ ) to indicate one-shot AF (# 409
0) and return.

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 (serial communication once) (# 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”. The 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 (# 42).
5) If it is not set or self-timer is not running (SLP = 0), the AF start switch (S ₁ ) is ON
Has been that whether or not the terminal determines the level of _{(IP 5) (# 427)} . When the switch (S ₁ ) is ON (IP ₅ = “L” level), AF control is performed (# 429).
Sets a flag (S ₁ ONF) indicating the ON switch _{(S 1) (# 430)} .

AF based on data input from card in communication (II)
When prohibition data is set, self-timer is in progress, or switch (S ₁ ) is turned off (IP ₅ =
When the signal is at the “H” level, a signal for stopping the AF drive motor is output to the lens control circuit (LECN) to stop the lens drive (# 431) and AF is performed in order to inhibit the AF operation. Set the flag (AFNF) indicating that there is no (# 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 even if the AF start switch (S ₁ ) is accidentally pressed during data setting by disabling AF control in the card example and giving priority to data setting. Not to be done. When the flag (AFNF) is set, the signal indicating that the image magnification data cannot be used (AEFLAG b ₁ ) is set to “O” and the data is output to the card during data communication (III). .

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

First, in FIG. 14, the outer rectangle (12) indicates a shooting screen. Among them, (LM ₁ ) to (LM ₄ ) indicate the photometry range, and (AF ₁ ) to (AF ₃ ) indicate the focus detection range. With respect to the focus detection range, the camera has a switchable spot / multipoint AF, when selecting the spot AF is, AF is performed based on the subject information of the focus detection range (AF _2), the multipoint AF There when it is selected, AF to the object is brought into focus closest to the camera from the above three ranges _{(AF 1) ~ (AF 3} ) is performed. Hereinafter, (AF ₁ ) is the first
Island, (AF ₂ ) second island, (AF ₃ ) third
I will call it an island.

To explain the AF control shown in the flowchart of FIG. 12A, first, a flag (S ₁ ONF) is determined to detect whether the AF start switch (S ₁ ) is pressed for the first time, If it is not set, it is determined that the button has been pressed for the first time, and the flag indicating AF (AFEF), the flag indicating low-con scan prohibition (LSIHF), and the flag indicating the beginning of low-con scan (LSFI) are reset (#). 702, # 703, # 70
4), 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 (# 705).
800).

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
Whether the mode / M mode is determined by the level of the terminal (IP ₁₀₎ (# 710), when in the AF mode, step of determining focus lock mode (# 711) is selected, the bit (Fb ₁₄₎ Determined by In the M mode, the auxiliary light mode is prohibited in step (# 798) (Fb ₁₃ = 0), and the manual focus subroutine [MFOCUS] is executed in the next step (# 799).
A flag (AFNF) indicating that the focus is not performed is set (# 800), and it is determined whether or not the subject is in focus (# 780). If the subject is in focus, the flag (AFEF) is set (# 781). If not, reset (# 782) and return.

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, calculates the defocus amount of the island (DF _2), which as a defocus amount, the process returns (# 4100～ #
4110).

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).
The average of (CT ₁ ) and (CT ₂ ) is obtained, the data is input (dumped) as (CT ₁₂ ), and the process returns. (# 4168, # 4
170).

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 you are not the focus lock is selected by the switch (S _Q) to stop the driving of the lens in the step (# 712),
It is determined whether the in-focus state has been set by determining whether the flag (AFEF) is set (# 713). If the flag is set, the process proceeds to step (# 714), and the M focus is controlled to perform step (# 780). Proceed to. 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. Defocus amount (#
4102 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. If it is a payout (FWF = 1), it is reset (# 4445).
This time, the lens drive amount must be
(# 4450) and returns. If the flag is not set, it is assumed that both the feed-out and the carry-in have been performed. It is useless to perform the low contrast scan any more. Therefore, the flag (LSIHF) is set to indicate this (# 4455), and the routine returns. Then go to (# 752)
Proceeding to step (# 752), the same processing as described above is performed.

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 (LCONE) (# 762) and determines whether or not the lens is in focus based on 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 (following F) is not set, one-shot AF (stops lens driving once focus is achieved, focus detection can be stopped at this time) or continuous AF (after focusing) It is determined from the data (Fb ₈ ) whether to follow the subject and drive the lens according to the obtained defocus amount (# 4250). One-shot AF
In the case of (Fb ₈ = 0), whether or not the flag (AFEF) indicating the focus is set is determined by (# 4255), and when it is not set, or in the case of continuous AF (Fb 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, and in step (# 4335), the lens drive amount is determined.
In step (# 4340), the lens is driven and the routine returns. 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 (follow F) is set, the defocus amount (DF) obtained this time is calculated as (DF ₁ )
(# 4342). And the defocus amount DF = DF +
(DF−DF ₂ ) (DF ₂ is the previous defocus amount, that is, the difference between the previous and current defocus amounts is added to the current time), and (DF ₁ ) is set to (DF ₂ ), and step (# 4345) is performed. Proceed to). In step (# 4345), the lens drive amount (N) is obtained by multiplying the obtained defocus amount by the K value. The number of lens extension pulses at that time is read and set as (CT ₃ ).
[Delta] CT ₃ obtains the [Delta] CT in -CT ₁₂ as the movement amount of the lens from the integrating center, returns seeking lens drive amount at the time calculation end by pulling the [Delta] CT from the N (# 4346) ~ (# 434
8).

In step (# 4255), if the flag (AFEF) is set without indicating that focusing has been performed, the process proceeds to step (# 42
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 that focusing has been performed from an out-of-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), registers (DF ₂ ) and (DF ₃ ) for storing the defocus amount
Is reset, the obtained defocus amount (DF) is stored in the same register (DF ₁ ) (# 4270), the variable (N) is set to 0 (# 4275), and the above (AFEIF) is reset. (# 4280) and return. Step (# 42
In step 60), after focusing (AFEF = 1), when performing the second or subsequent focus detection (AFEIF = 0), the process proceeds to step (# 4288), and the defocus amount is sequentially stored in a register for storing the defocus amount. memory to go [register contents (DF ₂₎ register (DF _3), in the register (DF ₁₎ the content of the register (DF _2), calculated defocus amount and the (DF) in the register (DF ₁₎ Do) add 1 to the variable (N),
It is determined whether this (N) is 2 or more, that is, whether or not focus detection has been performed three times after focusing. If it is within two times, the process returns without driving the lens (# 4285 to # 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 (when LCONF = 1, the red LED blinks, and when it is not (LCONF = 0), the light is turned off.) (102) indicates the focus detection area. When the area (102) is displayed, the spot AF is shown, and when only the outer area (102b) is displayed, the multipoint side distance is shown. (103) is the continuous mode or the following mode. Is displayed (following F = 1), and is turned off when it is not in continuous AF or following mode. (104) “AF / M” is AF display when in AF mode (AFNF = 0), At other times (AF
NF = 1) performs M display. Incidentally, AF switch (S ₁₎ is OFF
(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 the subroutine of this change (# 91
Go to 5) and return (details will be described later). If the above switch (S _EM ) is not turned on, 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), and (Fb ₀ ) of the function data (Fbn) of the RAM
(Fb ₁ ) is checked to determine whether the P mode is currently selected as the control exposure mode. If the P mode is selected, the process proceeds to step (# 1010) to determine whether the A mode is selectable. Judgment is made by the bits of the E ² PROM, and if selected, the exposure mode is changed from P to A (# 1015),
The function data (Fb ₀ , Fb ₁ ) is changed from (0,0) to (0,1) and the process returns (# 1015). If it is determined in the above step (# 1010) that the A mode cannot be selected, the process proceeds to step (# 1025), where it is determined whether the S mode has been selected. Here, the S mode has not been selected. In some cases, the process further proceeds to step (# 1040) to search whether the M mode has been selected or not and sequentially search for a mode that can be selected. Then, if there is a mode that can be selected, it is set. When the A, S, and M modes are not made selectable, that is, when only the P mode is made selectable, the P mode is set (# 105).
0).

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. determining whether M mode is to be selected, and change the exposure mode of the mode to be selected bits (Fb _0), to change the (Fb _1), the process returns (# 1020～ #
1030).

Now, when the S mode is selected as the control exposure mode (Fb ₀ , Fb ₁ = 1, 1), it is determined whether the M mode is selected. If the M mode is selected, the M mode is set and the M mode is selected. If not, return to P mode and return (#
1030 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) determines whether or not the switch (S _SE ) indicating the function to be changed is ON (# 1205), and turns ON.
If the function to be changed is set in the bits (Fb ₉ , Fb
b ₁₀ ) (# 1225), proceed in the order of +/− → S / C → S / A, and proceed in a cyclical manner to return to +/− after S / A, and to determine the bit (Fb ₉ , Fb ₁₀ ) Change the data.

In step (# 1205), the switch (S _SE ) is turned on
If not, go 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 furthermore, 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).

Referring back to FIG. 17, if the mode is the S / C mode, the data (Fb ₃ )
It is determined whether the current mode is single shooting (S) or continuous shooting, and data is changed so as to be opposite to the current mode (#
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)
Whether it is determined by data (Fb _2), to change the data (Fb ₂₎ so that opposite current mode (# 130
0), return.

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. Here, when 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 turned on.
1830), and if not turned on, the process proceeds to step (# 1850) to change the shutter speed. First, let's explain how to change the shutter speed.
Add 5Ev and go to step (# 1855). step 1
855), the set shutter speed is the fastest (Tvm
ax) is determined, and if so, the maximum speed is limited (# 1860) and the routine 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 the mode is the P mode (Fb _0,1 = 0,0), it is determined whether the P shift is prohibited (# 1817). If the P shift is prohibited, the process returns.
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) (# 184
0), if not exceeded, do nothing (step # 184)
Proceeding to 5), it is determined whether the mode is the P mode. If the mode is the P mode, the process proceeds to the step (# 1879) in the flowchart of FIG. 22B. When the mode is not the P mode, the process returns. When the mode is not the P mode in step (# 1815) (Fb _0,1 ≠ 0,0), it is determined whether or not the mode is the A mode (# 18).
20), if in the A mode (Fb ₀ , Fb ₁ = 0, 0), the step (#
1830), the aperture value (Av) is controlled to be increased, and when neither of them is selected, that is, when the mode is the S mode (Fb ₀ , Fb ₁ = 1, 1)
Goes to step (# 1823) to control the shutter speed (Tv) to increase.

If the down step (Sdn) is ON in step (# 1805), the process proceeds to step (# 1865) in FIG. 22 (b) to determine whether or not the mode is the M mode. (Fb ₀ , Fb ₁ = 1,0), Aperture change switch (S _AU ) is ON
It is determined whether the shutter speed has been turned on (# 1877). If it has been turned on, the process proceeds to step (# 1885) as an aperture change, and if it has not been turned on, the process proceeds to step (# 1905) as a shutter speed change. In step (# 1905), 0.5Ev is subtracted from the set shutter speed, and it is determined whether or not this is slower than the camera's minimum shutter speed (Tvmin) (# 1907). (# 1908) If not, return without doing anything. Step (# 187
When the aperture change mode is determined in step 7) (S _AU ON), the aperture value (Av) is reduced by 0.5 Ev in step (# 1885).
Then, it is determined in step (# 1890) whether or not the value is smaller than the open aperture value (Avo). If the 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 the mode is the P mode (Fb _0,1 = 0,0), it is determined whether or not the P shift is prohibited (# 1872). If the P shift is prohibited, the process returns. If not, the process proceeds to step (# 1885). When the mode is not the P mode (Fb _0,1 ≠ 0,0) in step (# 1870), the process proceeds to step (# 1875) to determine whether the mode is the A mode. The flow proceeds to the flow for controlling the aperture value down. Otherwise, the mode is determined to be the S mode, and the flow proceeds to step (# 1879) to control the shutter speed down.

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, the luminance values of the four metering range shown in FIG. 14 to enter (Bv ₁ to BV _4. Finish communication when the terminal (CS
LM) to the “L” level (# 1615). Subsequently, in step (# 1617), the value of Bv ₂ is entered into Bvc, and step (# 161
8) In B _UAUE Ask for. Thereafter, the flow advances to (# 1622) to determine whether or not the flag (AFNF) indicating that the mode is not 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 one is set, the process proceeds to the above-mentioned step (# 1660), and the small photometry range (L
M ₂ ) is defined as a spot value (Bvsp). When the flags (AFNF) and (LCONF) are 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) ), In the next step (# 1630), it is determined whether or not the image magnification β is equal to or more than a predetermined value (K), and the size of the object occupying the photographing screen is determined. If the value is equal to or larger than the predetermined value, the subject is determined to be large (step # 164).
Each metering range _{0) (LM 1), (} LM 2), ( the luminance value of the _{LM 3) (Bv 1),} (Bv 2), the average spot metering value (Bv ₃₎ (B
vsp).

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 luminance value (Bv ₁ ) of the photometry range (LM ₁ ), and if the flag (AF2F) is set, the luminance value (Bv ₂ ) of the photometry range (LM ₂ ) Is not set, that is, the third island (AF ₃ )
When the defocus amount of is selected, the brightness value (Bv ₃ ) of the photometric range (LM ₃ ) is set to the spot photometric value (Bvsp), respectively.
(# 1645 to # 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), it is determined whether or not the AE lock switch (S _AEL ) is turned on. If not, the flag (AELF) is reset (# 1755). ON
Is set, the flag (AELF) is set (# 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 (Bvs
Return as (p) (# 1752). 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 designated based on the address having the necessary data inputted from the card (# 362-7), and the serial communication is performed by the number of times of the serial communication inputted 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 light metering range (LM ₄ ) is used in the same manner as the actual aperture metering.
The shutter speed is calculated by adding the film sensitivity (Sv) and the exposure correction value (ΔEv) to the photometric value (Bv _AM ) (or a photometric value obtained by averaging the whole values instead of these values), and the process returns (# 2005). If the lens is attached, it is determined whether or not the camera is in the forced P mode based on the data input from the card (# 2006). In the case of the forced P mode, the process 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 by determining 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 (switch S _{M of the} electronic flash device)
There determines whether ON) in step (# 2105), if _{fitted, Ev = Bv AM + Avo +} Sv from the photometric value (Bv _AM) or the like of the exposure values of the control (Ev) of the metering range (LM ₄₎ It is determined by −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. still,
The main subject is about to be properly exposed by the flash from the electronic flash device. And aperture value (Av), shutter speed (T
The program proceeds to the subroutine (# 2120) of the program I for determining v), and in step (# 2170), forcible ON is set and the process returns. The program I is shown in FIG. 24 (b) and explained. The control value (Tvc) of the shutter speed is set to Tv for tuning.
= 7 (SS = 1/125) and the aperture value (Av) is the exposure value (Ev)
The shutter speed is calculated by subtracting 7 (shutter speed) from the above, and it is determined whether or not the aperture value (Av) is greater than 7 (F = 11). # 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 due to the aperture and the GN is limited, so the main subject may not be correct with strobe light.If the P mode is left to the camera, 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)
If the difference between B _UAM -B _VSP is less than 2, it is determined that the light is not in a backlight state, and the process proceeds to step (# 2145), and the light metering range (LM ₁ ) to (LM ₄ )
From the average photometric value (Bv ₁ + Bv ₂ + Bv ₃ + Bv ₄ ) / 4 to the exposure value (E
v), the aperture value (Av) and shutter speed (Tv) are determined by the above-mentioned program II (# 2150), and when the shutter speed (Tv) is lower than the speed of the camera shake warning (Tv = 6,1 / 60), It is determined whether or not there is (# 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 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 (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 it is a group designation, according to each communication number (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 ΔAv... Aperture shift amount ΔTv... Shutter speed shift amount Next, description will be given for the case of group designation.

G ₀ …… Display data being set …… 9 serial communications G ₂ ··· ΔLp ··· Lens drive pulse ··· One serial communication Returning to FIG. 6, when 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 (# 476-9), 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. If the data is (ΔAv) and (ΔTv), add (ΔAv) to the control aperture value (Avc), add (ΔTv) to the control shutter speed (Tvc), and add (ΔSv) to the film sensitivity (Sv). And return (# 2640 to # 26
50).

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 in P, A, S, one of the M mode, eight data b ₄ ~b ₆ is mode by the IC card setting is Each has been entered.
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 the data for turning on / off the display of +/- for exposure compensation, 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 / lighting / turning 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 indicating the sequence of the camera. B ₀ : All lights off (main switch OFF) b ₁ : Standby (main switch ON, S ₁ OFF) b ₂ : Card display b ₃ : Initial load S 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 S ₄ … Indicates AF / M.

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 data 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 the 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 "-" mark 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), the 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 , Furthermore, numerical display based on the data of DP _4H , and b ₀ , b of DP _7H
1 to control the display of the card (# D-75 to # D-75).
D-95). The display of this card will be described later in detail.
Step If not card display mode in the determination of (# D-70), the step proceeds to (# D-105) switches (S ₁₎
It is determined whether or not is turned on. If it is turned on, the in-finder display is performed based on the infinder information (# D-110). If it is not turned on, the in-finder display is not performed. Each 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 of DP _{2H 0,} 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 information of DP _{6H, 7H} , Data change based on information of DP _8H (Δ) display Displays the 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, the serial communication is performed 12 times (# 2720) as a mode for outputting data (shutter speed aperture value, number of films, etc., see FIG. 29 (e)) created by the camera (# 2710). ). 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). If it is a camera shake warning, a buzzer warning is issued (# 2745) regardless of whether or not a buzzer warning is issued by the custom card, 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 (# 3205),
To 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 it is ON (IP ₇ = "L"), it is determined whether or not release prohibition data obtained in communication (II) is set (# 47).
5) If set, go 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), it is determined in step (# 505) whether or not the release switch (S ₂ ) is ON. If the release switch (S ₂ ) is ON (IP ₇ = “L”), it is determined whether or not a signal for forced continuous shooting is input from the card. Is determined. 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) ), Step (# 5
In step 15), all interrupts are enabled, and the routine proceeds to [SO]. When the mode is not the continuous shooting mode (Fb ₃ = 0), the process returns to the step (# 505), and waits until the release switch (S ₂ ) is turned off.
When FF is set, all interrupts are enabled in step (# 520) and the routine returns.

Next, the exposure control subroutine of the above step (# 495) will be described with reference to FIG. First step (# 28
At 05), the terminal (CSST) is set to the “H” level for (t ₃ ), indicating that the electronic flash unit (ST) is in the exposure mode. Then, the film sensitivity (Sv) is D / A converted as analog data to a dimming 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. 3C. 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,
FIG microcomputer in (a) (μC) outputs a motor winding signal to the motor control circuit (MD), thereby resetting the timer started _{(T 3) (# 2850,} # 2855). This mimer is a timer for detecting that the film has been wound up to the last frame and the film has become stuck. The microcomputer (μC) determines in step (# 2860) whether the switch (S _WD ) indicating that one frame has been wound has been turned on, and if not turned on, determines whether 2 seconds have elapsed in this state. If 2 seconds have elapsed, the motor is controlled to stop (# 2870). If the film is stretched, this film stretching control is performed (# 2875), and then continuous shooting is performed. Is set to 1 (# 2876), the data communication I is performed (# 2877), and the process returns. FIG. 31 (b) shows the tension subroutine. To output the signal, a signal for reversing the motor is output (# 2930) and the film detection switch (S _FLM ) is turned off.
Waiting for F (# 2935), if the switch is turned off, motor stop control (# 2955) is performed to wind the film into the patrone room, and then the routine returns.

Returning to FIG. 31 (a), in step (# 2860)
When the one-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. Execute the [INT ₂ ] interrupt. In the flow of FIG.
The microcomputer (μC) first prohibits interruption to this flow (# 3000), and then detects in step (# 3005) whether or not the rewind switch (S _RW ) is ON. If it is turned on, FIG. 31 (b)
The [rewind] routine shown in (1) is executed, the interrupt is permitted, and the routine returns (# 3010). Rewind switch (S _RW )
Is not ON, the back cover close switch (S _RD )
Assuming that N has been performed, the cancel signal (data is used for communication I) is reset to 0 to return to the bracket function or the auto shift function (# 3012), and the process proceeds to step (# 3015).
Determine if a film is present. If there is no film, therefore, if the film detection switch (S _FLM ) is OFF, step (# 310
Go to 0). On the other hand, when a film exists (that is, when S _FLM is ON), the terminal (CSDX) is set to the “H” level, and serial communication is performed with the film sensitivity reading circuit (DX) to perform film sensitivity data (Sv ) And the number of film shots (N) are input, and when communication is completed, the terminal (CSDX) is set to the "L" level (# 3020 to # 3030). Then, the number (N ₁ ) is set to −2 (# 3035), and then the terminal (CSDI
SP) to the “H” level to perform serial communication with the display control circuit (# 3045), and to indicate the initial load (DP _9H
b ₃ = 1) and the data of the number of films are output so that data other than the data indicating the number of films (N ₁ ) is not displayed. Terminal after serial communication (CSDISP)
Is set to the “L” level (# 3050). For the numerical value of the number of films (N ₁ ), the display is made using two 7 segments. Next, the microcomputer (μC) outputs a signal indicating winding of the motor to the winding control circuit (# 3055), waits for one frame to be wound (# 3060), and turns on the one-frame winding switch (S _WD ). One is added to the number (N ₁ ) to determine whether or not the number has become 1, and if not, the process returns to step (# 3040). If it is 1,
Proceed to step (# 3075) to stop the motor and proceed to step (# 3095). Then, in step (# 3095), the number of films (N ₁ ) and the film sensitivity are stored in an E ² PROM.
After 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.

<Bracket Card> When the bracket card is mounted on the camera, the bracket card executes the 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 (ΔEv) are transferred to the RAM, and sleep is performed (B-10).

Next, when a signal changing from "L" to "H" is sent from the camera to the terminal (CSCD) of the bracket card, the bracket card executes the 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) In the case of communication (I), the card is set to the data input side (B-25), and serial communication is performed to receive data (see Table 6) 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 CSII-1-b ₂・ Does card control display? CSII-1-b ₄・ Card function ON / OFF CSII-1-b ₅・ No communication (V) (= 0) CSII-2-b ₂ · Release prohibited CSII-2-b ₃ · Forced continuous shooting (= 1) CSII-2-b ₄ · AF prohibited CSII-2-b ₇ · ΔAv, ΔTv data (= 1) CSII -3-b ₀ Tv, Av / Display data (= 0) CSII-3-b ₃ Communication (IV) Yes (= 1) CSII-3-b ₄ Communication (III) No (= 0) CSII- 3-b ₅ Communication type CSII-3-b ₆ Photometry loop repetition All signals other than CSII-3-b ₇ are set to "0", and * in the table indicates "1" or "0" according to the time. Is set to "1", the control is turned on, and if "0", the control is turned 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 (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 set to “0”.

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

In communication (IV), it is data of ΔAv · ΔTv, which are stored in RAM.

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

The data setting subroutine will be described with reference to FIG. 35 (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-272).
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 flow advances to step (B-260) in FIG. 35 (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 (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 (B-405) to perform display control in the setting mode.

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

If the switch (S _CDS ) is OFF in step (B-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), set the E ² PROM write signal (signal sent to the camera) to 1, set direct addressing, output ΔAv, ΔTv (B-300), and step (B-300). Proceed to 310). This allows you to exit the setup process,
To write the data 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). In step (B-310),
During setting (SETF = 1), card switch (S _CD )
Is determined based on the data of communication (II) (B-315), and if it is ON (S _CD = 1), a flag (S _CD IF) indicating that it has passed is set. It is determined whether or not it is set (B-320), and if it is set, the process proceeds to step (B-345). If not, set it in step (B-325) (S _CD IF =
1) In the next step (B-330), change the mode to 12
And proceed to step (B-345).

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 (Sup) is ON, and if it is ON (Sup = 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).

 Here, in mode 1, 1 is 0.3Ev, 2 is 0.5Ev, and 3 is the exposure shift amount of 1.0Ev.

Even when the mode is 2, it progresses from 1 to 2 to 3, and after 3 it is 1
(B-365).

Here, 1 is 3 sheets, 2 is 5 sheets, 3 is 7 sheets of film.

When the change in each mode is completed, step (B-40)
Proceed to 5). When the up switch (Sup) is off, it is determined whether the down switch (Sdn) is on or not (B
If it is not ON, the process proceeds to step (B-405). When the switch is turned on, the switch (Sup) is the same as the switch (Sup) except that the change is performed in the opposite direction.

When the processing of (Sup) and (Sdn) 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. This allows the camera to control the display with the card, prohibit release, prohibit AF,
The function to continue the display regardless of the power holding timer of the camera is executed.

In the above step (B-310), setting is not in progress (SETF =
0), the step (B-43) 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, set it (B-440), determine whether the card function is currently ON (B-445), and if it is ON, turn it OFF (communication II data). (B-450),
The flag display (display F) is reset (B-451) and the routine returns.

If it is OFF, set it to ON (communication II data) (B-45
5) The display flag is set (B-456), and the flow advances to step (B-170) to control the display of the card name.

Returning to FIG. 34, if it is not communication (I), it is determined whether or not it is communication (II) (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 the 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 ΔTv and ΔAv is designated (B-80), serial communication is performed twice (B-85), and the process proceeds to step (B-90). 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. 37 shows the details of the exposure calculation subroutine in the above flow, that is, the main part of the present invention. In FIG. 37, if the card function is OFF, the process returns without doing anything. However, if the card function is ON, the steps (B-505) to (B-520) determine the mode of the shift amount and shift. The amount (ΔEv) is set, and in steps (B-525) to (B-540), the mode of the number of shots is determined and the number is set. Then, after these judgments and setting are completed, steps (B-545) and (B-555)
Initial settings are made in (B-560), and the first of the number is set to an appropriate exposure. Then, a release switch (S ₂₎ 1 is added to counter N ₁ showing the when is ON number, a determination of N _1, step (B-570) in accordance with the number of sheets (B-5
75) Change the exposure amount in the order of (B-595). That is, for example, _{1 in} the numerical determination of N1 in step (B-565).
In the case of (i.e., during the second bracket shooting), the exposure shift amount is ΔEv, and when N ₁ = 2 (the third image), −ΔE
When v, N ₁ = 3 (4th sheet), 2ΔEv, N ₁ = 4 (5
(2nd sheet) when -2ΔEv, N ₁ = 5 (6th sheet)
When ΔEv, N ₁ = 6 (the seventh sheet), it becomes -3ΔEv,
While the shift to the under side and the shift to the over side are performed alternately for each sheet, the shift amount is divergently increased. Of course, steps (B-525) to (B-525)
When the number of shots is set to N = 3 by (−540), the process ends in step (B-575), and when N = 5 is set, the process ends in step (B-585), and N = 7 is set. Of course, it goes without saying that the processing is performed up to the step (B-595).

After the exposure amount of each of the steps (B-570) to (B-595) is shifted, the step (B-600) is performed.
In step P, the exposure mode is determined. In P mode, 1 / 2ΔEv is corrected for each of the aperture shutter speeds. In A and S modes, the calculated shutter speed and aperture value are corrected. When ON, set the aperture to OF
In the case of F, assuming that the shutter speed is to be changed, ΔTv and / or ΔAv corresponding to each mode are set so as to be corrected by ΔEv, and the process returns.

The display during data setting in the case of a bracket card is shown in FIG.

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.

Table 4 shows an example of a map of the RAM in the camera. In the case of such a RAM (including E ² PROM) map, if communication MP needs groups MP ₁ , MP ₃ , MP ₁₀ of data (G ₀ , G ₁ , G ₂ ) in communication II, it is necessary to specify the group. In advance the MP _1, MP _3, MP ₁₀
The start address and the number of are stored, and according to the signal,
These may be read. These are compatible with existing card systems because they only read out fixed data. However, newly with other function cards are made, for example, when it is necessary to the other data MP ₂ and MP _3, it can not be read out 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, discrete data (for example,
MP Only ₂ data and data MP ₇₎ can not be specified, will be all the data up to MP ₂ to MP ₇ is specified, the transfer of data (memory and time) waste caused . 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.

Effect of the Invention As described above, according to the present invention, bracket shooting is performed sequentially with the exposure level shifted to the over side and the under side based on the determined value. Even in the case of being stopped halfway, there is an effect that the probability that a photograph having a proper exposure amount is included in a photographed image is increased, which is extremely useful.

[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) and 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 bracket card, FIG. 36 is a diagram showing a display example thereof, and FIG.
The figure shows the same operation flow, and FIG. 38 shows the display accompanying the setting.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naohiro Kageyama 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka Kokusai Building Minolta Camera Co., Ltd. In-house (72) Inventor Takehiro Kato Azuchi, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Camera Co., Ltd. In-house (72) Inventor Yoshihiko Higashi Osaka International Building Minolta Camera Co., Ltd. 2-3-1-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka 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

Claims (3)

(57) [Claims] 1. A camera having a bracket function for taking a predetermined number of images while automatically changing the exposure amount to a film for each frame, means for determining an exposure level, and shifting from the determined exposure level. A camera characterized in that shifting to the over side and shifting to the under side are performed alternately for each frame while increasing the amount. 2. A means for determining an exposure level in a camera having a bracket function for taking a predetermined number of images while automatically changing an exposure amount to film for each frame, and a first frame for determining the exposure level. A camera that shoots at the level and shifts to the over side and to the under side alternately for each frame after the second frame. 3. The camera according to claim 2, wherein the shift to the over side and the shift to the under side are alternately performed for each frame while increasing the shift amount.