JPH02118541A - Camera system - Google Patents

Abstract

PURPOSE:To give an impression at the time of proper photography even if a focusing state is not entered by using an accessory with a control function and controlling a lens driving means according to the output of a focusing detecting means. CONSTITUTION:An IC card as the accessory with the control function is attached to a camera main body. When a shutter release button is operated only by a 1st stroke, a 1st switch is turned on and the lens driving means LECN is driven according to the output of a focusing detecting means AFCT. When the lens reaches a focusing position, the 2nd stroke of the release button is turned on and a 2nd switch is turned on to move the lens, thereby obtaining an image of a focus position different from the subject at the time of focusing. A photographer is not given an out-of-focus impression because the lens is at the focusing position before the release switch is turned on. Further, the lens is so controlled as to return to the focusing position after exposure.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera system, and more particularly to a camera system having a function of moving a lens during a release time lag.

Generally speaking, cameras are designed to take exposures with the lens stopped.

On the other hand, when viewing a subject with a single-lens reflex camera, the camera is configured to look through a photographic lens and a finder.

However, if you want to take a picture at a focal point different from the one in focus, you should first focus on a position offset from the subject before taking the picture, and then move the lens from there. Then,
An out-of-focus image of the subject can be seen through the finder, which is inconvenient because it gives the photographer the feeling that the photograph is being taken out of focus as a whole.

The present invention has been made in view of these points, and
Even when shooting at a focus position different from the one in focus,
To provide a camera system that can give a photographer the impression that he or she is photographing in focus through a finder.

- In order to achieve the above-mentioned object, the camera system of the present invention has the following features:
A focus detection means, a lens driving means for driving the ↑most shadow lens, a release button, a first switch that is turned on when the release button is turned on with a first stroke, and a release that is turned on when the release button is turned on with a second stroke. and a second switch for driving the lens drive means to bring the photographing lens to the in-focus position according to the output of the focus detection means when the first switch is turned on, and when the second switch is turned on, the lens driving means is driven to bring the photographing lens to the focus position. and control means for driving the driving means so as to bring the photographing lens to a position different from the in-focus position.

In this case, the control means may be configured to control the drive means so as to return the photographing lens to the in-focus position after the exposure is completed.

The apparatus may further include an aperture determining means, and the other position may be a position corresponding to a depth based on a predetermined aperture determined by the aperture determining means.

Further, the control operation of the control means for moving the photographing lens from the in-focus position to another position is based on the control function of an accessory that is detachable from the camera body, and the aperture determining means is provided in the accessory. It is desirable to do so.

According to the configuration of the present invention, the first switch is turned on based on the operation of the release button (the first stroke of the cough release button).
Then, the lens drive means moves the photographing lens to the in-focus position based on the output of the focus detection means. As a result, when the first switch is 0)J and the second switch is still OFF, the camera is in focus, and an image with the subject in focus is obtained in the finder.

After that, the second stroke of the release S opening causes the second
When the switch is turned on, the photographing lens moves and an image with a different focus position than the subject at the time of focus is obtained, but this leaves little impression on the photographer and does not cause him or her to feel uneasy. Note that if the photographing lens is returned to the focusing position after the exposure is completed, the in-focus image will be visible in the finder even after the photographing is completed, giving the photographer an even greater sense of security.

Furthermore, if the point at which the lens moves (another position) is set to a position corresponding to the depth based on the predetermined aperture determined by the aperture determining means, photographing can be performed in which both the subject and the background are in focus.

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

A microcomputer (hereinafter referred to as a "microcomputer") that performs various calculations has an E2FROM, and internal writing and reading can be performed freely. (AFct) is a focus detection circuit that performs focus detection, and is composed of a COD, an integral control circuit, and an A/D conversion circuit.
Information on the subject is obtained for each distance measurement area, A/D converted, and outputted to a microcomputer (μC).

(LDI) is an auxiliary light emitting element that emits light toward a subject to enable focus detection when the brightness is low and focus cannot be detected.

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

In this embodiment, the IC card (CD) includes a custom card that allows you to change and select camera modes depending on the user, and controls various functions of the camera (AE program, AE mode, AF mode, etc.) depending on the shooting situation. 4 program cards that automatically determine 4 program cards that add special functions
function cards.

10 4 types of memory cards that store shooting data
There are several cards. These cards will be explained in detail later. (ST) is an electronic flash device, (IF) is an interface provided between the camera's microcomputer (μC) and the electronic flash device (ST), and (STC) is a flash light emitted through a photographic lens (not shown). This is a light control circuit that receives the reflected light from the subject and stops flashing when the appropriate exposure amount is reached. (LE) is a lens circuit provided in the lens and outputs information specific to the interchangeable lens to the microcomputer (μC) of the camera. (LECN) is a lens drive control circuit that drives the photographic lens based on focus detection information.
(ENC) is a converter that detects the rotation of the motor that drives the lens.
Outputs pulses to

The microcomputer (μC) counts these pulses, detects the amount of extension from the current position (1), and detects the distance from this amount of extension (number of extension pulses (CT)). (TVct) is a shutter control circuit that controls the shutter based on a control signal from a microcomputer (μC);
AVct) is an aperture control circuit that controls the aperture based on the control signal from the microcomputer (μC), and (MD) is a motor control circuit that controls film winding and rewinding based on the control signal from the microcomputer (μC). It is. , (B
Z) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is the battery that serves as the power source, and DC/DC is the voltage supplied to the microcontroller (Voo)
DC/DC converter to stabilize (D+
) to (D4) are a group of diodes that provide a voltage lower than the voltage (VDD) to the microcontroller when the DC/DC converter is OFF to reduce power consumption.The hardware of the camera microcontroller (μC) is this Since it can operate at a low voltage, an interrupt is generated, but the microcomputer (μC2) of the IC card (CD) cannot be driven at this low voltage.

(R11) (CR) is a reset resistor and capacitor for resetting the microcomputer (μC) when the battery is installed. (Tr+) is a power supply transistor that supplies power to a part of the circuit described above.

Next, to explain the switches, (SRE) is a battery installation switch that turns off when the battery is installed, and when the battery is installed and the switch (SIIE) turns off, the microcontroller (μC) A signal changing from "L" level to rHJ level is applied to the terminal (RE), and the microcomputer (
μC) will execute a reset routine to be described later. (SEn) is a normally open button-type exposure mode change switch, and the exposure mode is changed by operating this switch (SEM) and operating an up switch (Sup) and a down switch (Sdn), which will be described later. (SFLIN
) is a normally open button-type function change switch, and functions are changed (for example, switching between continuous shooting and single shooting) by operating this switch and the up switch (Sup) and down switch (Sdn). (ScD) is a normally open button switch that is used when a card is installed to enable/disable card functions or to change data settings on cards other than program cards. Yes (details will be explained later). (Sea
s) is a card data setting switch that is operated when transitioning to data settings when a card is installed. (Sl) is a switch for performing preparatory operations necessary for shooting such as photometry and AF operation. Then, the first stroke of the release button (not shown) turns it on. The above switch (Sf:n),
(Spus), (SOD), (Scos), (
If any one of Sf) is operated and turned ON, an interrupt (INT+), which will be described later, is executed. (SM
) is a main switch for enabling camera operation, and by turning this switch ON or OFF, an interrupt (INT2) to be described later is executed.

(S-up) turns ON L when mirror up is completed,
This is a switch that turns OFF when the shutter mechanism is charged and the mirror is lowered.

(S2) is a release switch that is operated when performing a photographing operation, and is turned on when the second stroke (deeper than the first stroke) of the release button is pressed. (SLIn) is a one-frame switch that is turned ON when one frame of film is wound. (SI!IEL) is a switch for performing AE lock (exposure lock) and is composed of a normally open bush switch. (SAF7M) is a focus adjustment mode switching state switch that switches between AF and manual focus adjustment.

(SIIE) is a normally open change data selection switch for selecting data to be changed. (Ssttp) is
This is a normally open button switch that sets the selfie mode when taking selfies.When this mode is set and the release switch (S2) is turned on, selfie photography starts (SALI) when the exposure mode is set to M. This is an aperture change switch that changes the aperture value by operating this switch and operating the up switch or down switch in manual mode. In M mode, press the above switch (S
When ou) is not operated, the shutter speed is changed by operating the up switch or down switch. (
SFLll) is a film detection switch that detects whether or not film is loaded, and is placed on the film rail surface near the spool chamber, and is turned off when film is present. , (SRC) is a back cover closure detection switch which turns ON when the back cover is closed and OFF when it is opened.When this switch is turned ON, the microcomputer (μC) executes an interrupt routine to be described later. (
SRIJ) is a switch for starting film rewinding, which turns ON when operated, executes an interrupt routine to be described later, and turns OFF when the back cover is opened. (Sc++
) is an IC card installation switch that turns off when an IC card (CD) is installed, and when turned off, resets the microcomputer (μC2) of the IC card (CD).

(x) is the so-called
It becomes F.

(Sup) is a normally open up switch that changes or adds data to be changed, and (Sdn) is a normally open down switch that also performs subtraction. When changing the aperture value in M mode, press the aperture change switch (Sou
), (Sup) and (Sdn) can be used to increase or decrease the aperture value, turn the aperture change switch OFF, and (Sdn).
up) and (Sdn) function to increase and decrease the shutter speed, respectively. Up switch (Sup
), the operation of the down switch (Sdn) is detected when the terminals (IP2++) and (IP21) each become "L" level. In Figure 1, the line (WI) common to each of the above switches is connected to the ground potential point (GND).
It is connected to the.

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

Next, before explaining the operation of the camera of this embodiment, four types of IC cards used here will be explained.

(I) Custom card: This IC card allows the photographer to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are deemed unnecessary), or select functions alternatively. By doing so, we aim to provide a camera that meets the photographer's intentions and photographic techniques. Additionally, unnecessary functions can be omitted, resulting in a camera that is simplified and has good operability when changing modes. Next, the explanation regarding this card and the display contents performed for it will be explained.

First, the functions of this IC card can be selected by (i) selecting the exposure mode, (ii) choosing between two functions, and (ii)
i) There is a relationship due to the operation of a switch on the lens side, etc.

First, the exposure modes related to the exposure mode selection in (i) above are: (b-1) Program mode (P mode) (b-2
) Aperture priority mode (A mode) (b-3) Manual mode (M mode) (b-4) Shutter priority mode (S mode). , S mode). Therefore, there are eight combinations, and the display is shown in Figure 2 (
Among the four modes displayed in a) (however, PROGRAM is represented by P), when setting the mode, the selected combination is displayed, for example, as shown in Figure 2 (b), and when shooting, the selected combination is displayed. The exposure mode is displayed [FIG. 2(C) (A mode selection)]. Dots around the letters (or numbers) indicate blinking. Details will be described later. The entire display is shown in FIG. 2(a) for reference.

Next, (ii) there is a choice between the presence/absence of the camera shake buzzer, and when setting this, the number 3 in the display shown in Figure 2(d) indicates whether the camera shake buzzer is present or not. A value of ``1'' on the film counter indicates the presence of a buzzer, and a value of ``2'' indicates no buzzer.

(iii) The relationship depending on the operation of the lens side switch is that which AF (autofocus) mode is selected when the switch provided on the lens side (described later) is operated. The modes are: ■First, when the switch is not operated, (E-1)
One shot over the entire area using multiple points/spots (following judgment after focusing) ■When the switch is operated (E-2) Focus lock (E-3) Spot AF (E-4) Continuous AF , when setting the rCuS as shown in Figure 2(d).
The numerical value “3” of t-3J becomes “2” The blinking display “
1” becomes “1” to “3”, but this blinking “1”
to "3" correspond to the above rE-2J to "E-4", respectively (the diagram is omitted and will be explained in detail at the time of setting).

The selection numbers and functions are shown in Table 2.

In addition, in (i) to (III) above, by turning on the card key once when setting the mode, (i) to (III)
) modes are selected in sequence, and by pressing the up switch or down switch, the function (set value) in that mode is selected. Modes (i) to (I[I), respectively.
and functions can be set cyclically.

(II) Program card: The program card is used to set the shooting scene and determine the shutter speed and aperture for AE in AF mode (continuous/one shot/focusing area) according to the situation of the scene or subject. It was created for the purpose of taking pictures according to the scene (details will be described later).

(III) Function card: (3-1) H/S card ((highlight/shadow) card) This card makes white objects whiter and black objects darker, and changes the exposure value obtained by the camera. Over a certain value (+
2. O) (highlight), under (-2,0)
(Shadow), and insert this card (H
/S selection) and the operation of the AE flock switch.

(3-2) AE bracket card This card allows you to adjust the exposure obtained with the camera to
Exposure can be performed by shifting 0.3, 0, 5, and 1 steps toward the underside (details will be described later).

(3-3) Auto-shift card This card attempts to change the photographic effect (depth or speed) by changing the combination of aperture value and shutter speed with respect to the exposure value.

(3-4) By driving the focusing lens during deformation card exposure,
This produces a soft focus effect or an inter-exposure zoom effect.

(TV) Data memory card: This is used to store shooting data, including: ・Film counter ・Control aperture value ・Control shutter speed ・Exposure compensation value ・AE mode ・Lens information (focal length and aperture FNO) ・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, we will explain the operation of the camera using a microcomputer (μC) shown in Figures 3 onwards.
) will be explained based on the flowchart, and each part will be explained in detail as necessary.

When the battery (E) is installed, the battery installation switch (SRε
) turns OFF, and the terminal (RE) changes from “L” level to “
A signal that changes to the "H" level is input and turns on the DC/DC converter (PWO = rHJ), the built-in clock starts oscillating, and the IC card (CD) is output via the terminal (φ).
A clock is also sent from the microcontroller (μC) to the microcontroller (μC). In addition, in the case of an interrupt, turning on the DC/DC converter and starting the clock are automatically performed by a hardware circuit. Next, the microcomputer (μC) executes the (RESET) routine shown in FIG.

First, the microcomputer (μC) prohibits all interruptions to this flow (#100) and sets all output terminals other than the DC/DC converter control (PWO) to the "L" level (#105). Also, reset all flags in RAM [Table 8 (described later)] and RAM (registers) (#1
1.

This allows you to change the exposure mode to P mode, spot/multi-point AF.
in multi-point AF mode, single shooting (S)/continuous shooting (C), single shooting (S)
), the mode without exposure compensation, and other settings are set.

Next, in step (#115), the number of films stored in E2FROM (N+), film sensitivity (Sv)
is read and transferred to a predetermined RAM. Thereafter, it is determined whether the main switch (SM) is in the ON state (#120). If the main switch is in the OFF state, (IPe='HJ), step (#125
) and set the power supply transistor (Tr+) to 0FF (P
W= r LJ ), and data communication (VI) of serial data is performed with the card.

Now, serial data communication will be briefly explained. A serial communication command sends a transfer start signal to the other party for data transfer (in the case of a card, C3CD=
'HJ), followed by the serial clock for transfer (Se
x) is output from the camera. The output side (camera or other party) outputs one bit of data in synchronization with the rising edge of this clock, and the input side (the other party or camera) inputs one bit of data in synchronization with the falling edge of the clock. By repeating this eight times (8 bits), one data transfer is completed, and by repeating this as many times as necessary, the necessary data can be obtained. The same applies to data communication with the lens (LE), data communication with the attenuation control circuit (DISPC), and data communication with the electronic flash device (ST).

Here, the data communication (VI) with the above IC card is
It is shown and explained in Figure (f). In this communication, first the terminal (C
8CD) as rHJ and request communication (#270)
. Next, set the data indicating data communication (m), set the camera on the output side, and perform data communication of data indicating communication (Vl) (#272.~#
277). After completing this, set the camera on the input side and wait for the data to be set on the IC card side (#280. $1282). Perform data communication (#
285), after inputting the data, the terminal (C8CD) is set to "L" to indicate the end of communication (#286). Based on the data input in this way, the camera's microcomputer (μC) determines whether it is in a state where it is okay to sleep (stop).
This is from the camera's microcontroller (μC) to the IC card (CD).
) is required for the operation of the IC card and the voltage (V
DD), these clocks and voltages are not sent during the operation of the IC card (when the camera goes to sleep, the clock stops and the voltage drops), and the IC card's microcontroller (μC2) This is to prevent this from happening, since predetermined signal processing (writing control to the E2PROM) cannot be executed.

Returning to FIG. 3, the determination described above in step (#135),
That is, the camera's microcomputer (μC) determines whether or not it is allowed to sleep based on the input data, and if it is OK to sleep at this point, it allows all interrupts and sleeps at step (#140). . This sleeve stops the clock and turns off the DC/DC converter in a hardware manner. If sleeve is not possible, step (#1
After waiting 30m5ec in step 45), the process returns to step (#130) and repeats the same process.

Next, turn the main switch (SrI) ON or OFF.
The interrupt (INTz) will be explained.

First, it is determined in step (#147) whether or not there is an interrupt due to the ON of the switch (Sl,), and if it is not an interrupt due to the ON (IPs='HJ), (INT+3 interrupt is prohibited #240), Set the display data (display of all lights off at this time #245), step (#2
At step 50), data communication is performed with the display microcomputer of the display control circuit (DISPC), and the process proceeds to step (#125), where the same processing as described above is performed.

Through data communication, the display microcomputer inputs data for all lights out, thereby turning off all data (see FIG. 2(e)). Note that control of the display microcomputer will be described later.

On the other hand, at step (#147) the main switch (SN) is
is ONL, in step (#150)
NT+) interrupt and proceed to the next step (#155
) to set the display data (standby display), and communicate data with the display microcomputer in step (#160). Through this data communication, the display microcomputer changes to the state shown in Figure 2 (f).
In FIG. 2(f), the P mode is selected as the AE mode, and there is no exposure compensation, and the single shooting mode is displayed.

It shows multi-point distance measurement, card function ON, and 5 films.

Next, the camera's microcomputer (μC) has a terminal (IPs) of
Is it at “L” level (switch SEMI 5puN,
5cot Sc. 5. It is determined in step (#170) whether any one of S is ON or not, and if it is not at the "L" level, the process proceeds to step (#125) and the sleeve is controlled as described above. If it is "L" level, step (#
180) and set the flag (OF) to hold the power for 5 seconds.
F) and executes the subroutine (SlON) to be described later (#190). Next, it is determined whether the terminal (IPS) is at the "L" level (#200),
If it is at r L J level, the card request signal (DSPREQ) is set to O in step (#203), and then the process proceeds to step (1180), and the process proceeds to step (#180) and (#1
Repeat step 90). If it is not at the r L J level (that is, if none of the above five switches are operated), proceed to step (#205), determine whether the power hold flag (OFF) is set, If it is set, reset and start the power hold timer in step (#215), and then proceed to the next step (#220).
to reset the flag (OPF) and proceed to step (#235
). Even when the power supply holding flag (OFF) is not set, the process proceeds to step (#235), and it is determined whether or not there is a signal requesting repeating the S+ON loop from the IC card (CD). , step (#1
Return to 90). This happens when the display by the display microcomputer is controlled based on data from the IC card, such as during data setting, and even though the user wants to see the display, the camera's power supply is turned off for 5 seconds. This is done to prevent the display from automatically changing to standby when the hold is terminated, making the display inconvenient for use. If there is no repeat request, the process proceeds to step (#237) and it is determined whether or not the timer has elapsed for 5 seconds.

If the time has elapsed, the process advances to step (#150), from standby display to sleeve control, and if the time has not elapsed, the flow from step (#190) [5ION] is repeated.

When an IC card (CD) is installed in the camera, in step (#172) a display request signal (D
After setting SE'REQ) in step (#172), the flow advances to step (#180) and subsequent steps.

Next, the routine [s1] for controlling photometry, AF, and display will be explained with reference to FIG.

First, (INT+) interrupts to this flow are prohibited (#400). This is because if the interrupt (INT+) shown in FIG. 3 occurs during the main control, the control operation will not proceed further. Next, (#405) the microcontroller (
The terminal (PH) of μC) is set to “H” level, and the PNP is connected to the transistor (Tr+) via the inverter (IN, ).
) by applying a low level to the base of the transistor (Tr+), the photometric circuit (LM),
Supplies power to the AF circuit (AFCT), etc. Next, input information specific to the interchangeable lens from the lens circuit (LE) (
#410). This is shown in FIG. 10 and will be explained. First, the terminal (C8LE) is set to "H", a bell is set, and serial communication is performed as many times as necessary in #60 to input information from the lens (#605). FIG. 4(a) shows the circuit inside the lens and will explain it. A decoder (2) counts the clock input from the camera and creates an address signal. At this time, when the predetermined address is reached, the lens data changes due to zooming, so the focal length is detected by the encoder (3) that detects the focal length, and the address is changed by the address circuit (5) according to the focal length. hand,
Output specified data to the camera body.

The switch (8o) is a lens-side switch (see FIG. 4(b)) provided on the lens (10), and since the data must be changed by this switch, the address is also changed. The address set in this way is
Output to OM (6). ROM (6) outputs data based on the specified address. This output is converted into a serial signal by a parallel-to-serial converter circuit (7) and is applied to the camera body.

Next, lens information will be explained. As shown in Table 11, the lens information sent to the camera body includes the lens attachment signal, the lens' open aperture value (Avo), the lens's maximum aperture value (Avmax), the aperture amount from ■ to close, and the focal length. Information, (lens drive amount/defocus amount) conversion coefficient,
ON of the lens side switch (So), 0FF1 This indicates whether or not the lens can be driven (LOK), etc., and is input to the RAM at the address in the body shown in the table. This signal (LOK) changes from "1" to "0" in response to a situation in which AF cannot be performed. The camera body receives this signal and stops the motor.

On the other hand, on the lens (10) side, there is a ROM as shown in Table 9.
and address structure. (A) and (B) are the same ROM but differ only in the So amount relationship and the LOK relationship.
It stores two similar data in memory. Conventionally, lens information has been relatively small, and a plurality of types of lens information with the same function can be stored in one ROM, and the lens information can be switched depending on the lens used. In this case, the amount of information per lens is fixed, and the required ROM is determined accordingly. In such a case, creating (increasing) new data indicating that the switch is ON or OFF requires two additional steps when data is changed by changing the address in the ROM according to the ON or OFF state of the switch. This means that a byte (ON, 0FF) is required. If there is room in the ROM, increase the 2 bytes 068, 08M as shown in Table 10 and change the address depending on whether the lens side switch (So) is OFF or ON to select 06M or 081+. do it. However, when there is no such luxury,
As shown in Table 9, ROMC provided for multiple types
In this embodiment, (B)] can be achieved by setting the data other than the data changed by turning the switch ON or OFF as the same data, and selecting (A) or (B) depending on whether the switch is OFF or ON. However, in this case, the types of lenses that can be used with this ROM are reduced. For the lenses in Table 9, the lens side switch (So) is OFF.
In the case of , either 08N or 078.08H is sent, and conversely, in the case of ON, 16n and 17s (bo=o, AF motor stopped) are sent. In addition, in the address (XXX)
indicates address data that changes depending on the amount of extension of the zoom or focusing lens, and is input from 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 side prohibits AF operation (lens drive) and performs only focus detection operation.

For example, when a zoom lens with macro is set to macro mode, AF operation is prohibited and address 07H (10th
Table), 08M (Table 9), AF when not in macro mode
Addresses 09H (Table 10) and 07H (
The data in Table 9) will be sent.

Now, even when a lens that has the function of the above switch (SO) is attached to an old camera that does not read this bit (because it is new data), it will also have the function of this lens side switch (So). (However, the latter two of the changes in functions due to the IC card - selection of focus lock, continuous, and spot AF - m) cannot be performed because the IC card is not an old camera, and the focus lock cannot be changed. ), and if the LOK signal is disabled from AF in response to the above switch (So) being turned on, the old camera will still be able to perform A
AF operation is prohibited because the lens cannot perform F.
Performs focus detection only. In order to execute this, when the above switch (So) is turned on, B in Table 9 and 10th
In the table, 07H, 08M, and the switch (So) is OF
When it is F, it is A in Table 9 and 06 in Table 10. l and 0
Either one of 7H and 09H 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 lens data, and to control whether or not to inhibit AF, so a description thereof with reference to the drawings will be omitted.

After entering the lens information described above, the terminal (C:
5LE) to “L” level and return (#610)
.

Returning to FIG. 6, the microcomputer (μC) continues to perform data communication (I) with the card in step (#413). In this data communication (I), the state of the camera switch.

Sends AE mode and control data from the camera to the IC card.

The contents are shown in the CA4-+CD table (see the first communication column). Data communication (I) is shown in FIG. 5(a). The communication method is almost the same as the data communication m) in Fig. 5(f) described above, except that data indicating communication (I) is set and output as data, and the subsequent data Communication (SIQ) is performed three times, and the camera side is the output side in this communication as well. Note that the use of these data will be described later.

Next, the microcomputer (μC) inputs electronic flash device information from the electronic flash device (ST) (#415). The information includes two pieces of information: a guide number (GN) indicating the amount of light emitted and a switch 0N10FF. Here, the electronic flash device used in this embodiment will be explained.

FIG. 8(a) shows a circuit block diagram of an electronic flash device,
(DI) is a reverse charge prevention capacitor, (C+
) is a large capacity backup capacitor, (μ
C3) is a microcomputer that performs sequence control, and (TM) is a detection circuit that detects the width of a pulse indicating the type of serial communication from the camera body and outputs a signal indicating the type of communication to the microcomputer (μCa). (D/D) is a booster circuit that converts a low voltage to a high voltage, and starts and stops boosting based on a signal from a microcomputer (μCa). (D2) is a rectifier diode, (CM) is a main capacitor that stores energy from the booster circuit, (LEC,) is a light emission control circuit that controls light emission, and (DISP) is a display circuit, as shown in Figure 8 (b). As shown in , it displays whether or not the power is on (a state in which boosting the voltage and data communication with the camera can be performed by a signal). When the power is on, "ON" is displayed, and when it is off, nothing is displayed. (Ilo CC)
is an input/output switching circuit that switches input/output for communication with the camera.

(sn) is a normally open bushing switch that turns the power ON and OFF; it is turned OFF when the power is ON, and turned ON when the power is OFF. ,(MONT)
is a circuit that monitors the amount of light emitted.
When the light emission amount reaches 4, it outputs an "H" signal. (Lo) is the amount of light emitted by 1/.

It is a normally open switch that switches between 4 and full light emission, and each time the switch is turned on, the switch changes to 174++ full light emission.

A microcomputer (μ) that controls the sequence of this electronic flash device
A flowchart of step C) is shown and explained from FIG. 8(C) onwards.

When the above power switch (SM) is operated, the microcomputer (
A signal that changes from "H" (the terminal is pulled up internally) to "L" is input to the microcontroller (μCZ), and the microcontroller (μC3
) is interrupted, and the microcontroller (μaS) is activated as shown in Figure 8 (
Execute the flowchart shown in C). In this flowchart, first, a flag (ON
F) is set or not 6 (#5T1
0). When the flag is set (ONF=1), the terminal (OPa) is reset to stop boosting the voltage.
Set to "L" level, turn off the ON display, and turn sleeve t6.
(#5T20 to #5T40). When the above flag (ONF) is not set, the flag (ONF) is set as an operation by turning the power from OFF to ON, and the terminal (OF2
) to r)(J level and start boosting (#5T50
．． #5T60). Then, it displays ON (#5T7
0), then reset the timer and start #5T
80), waits for 5 minutes to elapse (#5T90), and when 5 minutes have elapsed, proceeds to (#5T20), performs the same control as turning off the power, and goes to sleep.

Next, we will explain the interrupt processing (INT+ 3), which is performed when the camera requests data communication to send data from the electronic flash device to the camera, as shown in Fig. 8(d). When an “H” signal with a pulse width (T, ) is sent, the detection circuit (TM) detects this time (τ1
) and outputs a signal changing from "L" to "H" level to the (INTO) terminal of the microcomputer (μCS).

The microcomputer (μCs) inputs this change signal and outputs (I
NTO) interrupt processing.

Note that the terminal (φ1) is always working when the battery is installed, and the microcontroller (μCS) is connected via this terminal (φI).
A clock is sent from the timer detection circuit (TM) to the timer detection circuit (TM).

The microcomputer (μCS) first sets the terminal (OL) to "H" level to reset the timer, sets all outputs of the timer to "L" level, and does not respond to signals input to the timer. Then, in step (#5T120) it is determined whether or not the flag (ONF) indicating power ON is set, and if it is set, the data communication bit (STS+) is set to "
In step (#5T140), the terminal (OF2) is set to the rHJ level and the process proceeds to step (l18T180) to start boosting the voltage at 1sT13. On the other hand, if it is not set, reset the above bit (ST8+) and proceed to step (#5T180) (#5T150
). If the guide number restriction release signal is input from the camera, the process advances to step (#5T183) and controls the guide number restriction release.If the signal is not input, the guide number restriction switch (Lo) is activated. Determine whether it is turned on or not, and if it is turned on (
IP=rLJ) Flag indicating this restriction (LOLMTF)
Determine whether or not is set (#5T181.
#5T182). When set, reset this and set the terminal (OF2) to "L" level to prohibit the light emission stop signal from the monitor circuit (MONT) from being input to the light emission control circuit (#5T183. #5T184
).

If the flag (LOLMTF) is not set, set it, set the terminal (OF2) to "H" level to permit light emission limitation, and set communication data (8TS3) (#5T186. to #5T187). ). When the switch (Lo) is not turned on, step (#5T1
Proceed to step 90).

Note that this step (#5T190) requires step (#5T190).
It also comes from T184) and (#8T187).

In step (#5T190), the electronic flash device (ST)
As the output side, the terminal (1/QC) is set to the "H" level in order to indicate the output to the input/output switching circuit (IloCC).

The signal of the above bit (STS+) and the electronic flash device (ST
) (#8T200), wait for the data communication clock (SGK) to be sent from the camera body, and wait for the data communication clock (SGK) to be sent from the camera body. Then, in synchronization with this, communication is controlled to output data through the terminals (S, .,) and the input/output switching circuit (IloCC) (#5T21).
0). When this is completed, the terminal (OP+) is set to "L" level (lsT220), the above timer is reset,
The pulse width from the camera can be detected at any time.

When a signal with a pulse width (T2) is input from the camera, the timer (TM) sets the (FC) terminal to the rHJ level.

The microcomputer (μCs) inputs this to the terminal (IPI) and proceeds from step (#5T230) to (#5T240).

In step (#5T240), the terminal (OP+) is set to "H" level as described above, and the terminal (I/QC) indicating input/output control is set to "L" level (lisT250).
), the electronic flash device is controlled to be on the input side. Then, camera data sent from the camera in synchronization with the communication clock (8CK) is input to the terminal (SIN) through the input/output circuit (IloCG), and read into a predetermined register (RAM) (#5T260 . #5T270
). Then, set the terminal (OP+) to “L” level,
It is possible to receive pulses from the camera (#5T
280). As input data, the presence/absence of light emission, the presence/absence of forced OFF of the power supply, the presence/absence of forced ON of the power supply, and the presence/absence of light emission restriction release are input.

In step (#5T290), it is determined based on the input data whether or not the power is forcibly turned on. If it is not forced ON, proceed to #5T330. On the other hand, when indicating forced ON, a flag (ONF) indicating power ON is set and the terminal (
OF2) is set to "H" level to start boosting the voltage, display ON, and proceed to step (#5T330) (#5T
300~#5T320).

In step (#5T330), it is determined based on data from the camera whether or not the power is to be forcibly turned off. Forced OF
When F, the microcomputer (μC3) turns off the ON display, resets the flag (ONF) indicating power OFF, sets the terminal (OF2) to "L" level, stops boosting, and goes to sleep (#5T420~# 5T440). On the other hand, forced O
If it is not FF, proceed to step (#5T340), reset and start the timer, and determine whether 5 minutes have elapsed (#5T350).If 5 minutes have passed, proceed to step (#5T420) and force OFF. Perform the same control. If 5 minutes have not elapsed, it is determined whether or not exposure control has been entered (#5T360); if exposure control has not been entered, the process returns to step (#5T350) and step (
Repeat #5T350) and (#5T360). The signal from the camera indicating that exposure control has entered is a pulse width (T3) signal input through the terminal (s'r+). The detection circuit (TM) detects this and connects the terminal (
When this signal is input, the microcomputer (μC8) resets and starts the timer (#5T370), and based on the signal sent from the camera indicating the presence/absence of light emission, When emitting light, connect the terminal (o
ps ) to the r HJ level (#5T40, when no light emission is indicated, set the terminal (OPs) to "L" level and proceed to step (#5T412).This step (#5
T412) Te4:i, wait for the time (=150 msec) from turning on the switch (S2) (7) until the shutter's front curtain has completed traveling +α (emission time of the electronic flash device), and then set the terminal (OP+) to "L". (#5T415), it is possible to process even if an interrupt pulse from the camera comes in, and the process proceeds to the switch (#5T80) in FIG. 8(C).

In the circuit shown in FIG. 8(a), the AND circuit (AND, ) operates only during the exposure control operation, and is designed to receive a dimming completion signal. AND circuit (AND
2) determines whether or not to permit the light emission signal sent from the camera. Based on the signal from the camera, the microcomputer (μC3) sets the terminal (OF2) to "H"/"L".

Next, the interface circuit is shown in FIG. 9 and will be explained.

The signal (C8ST) indicating the type of data communication to the electronic flash device (ST) (the pulse width changes depending on the type), the clock at the time of communication (SCK), and the signal indicating completion of dimming are OR circuits (OR2+). It is supplied to the electronic flash device (ST) through. When the first curtain of the shutter completes travel, the
(FF), and a high level "H" signal is output from the terminal (XT).

(IloCG) is the input/output switching circuit, and the camera terminal (
The direction of data communication (input or output) to the electronic flash device (ST) is switched according to the signal from the I/QC).

In FIG. 11(a), the camera's microcomputer (μC) outputs a pulse with a fixed time (tI) width to the terminal (C8FL) in order to communicate data with the electronic flash device (input on the camera side). Set the QC terminal to rLJ level, set the input/output circuit to the input side, wait for the electronic flash device to set data, and input data once by serial communication (#65
0 to #655).

Returning to FIG. 6, the AF mode is determined in step (#417). This AF mode determination subroutine is
Shown in Figure (a). First, from the lens information, it is determined whether the above-mentioned lens side switch (So) is turned on (#4000). If this switch is turned on, the power holding time is reset and started ( 1
Step (#4005) Set the Q7 lag (OFF) and determine whether the card function is ON or OFF based on the 0N10FF signal of the card function input through data communication (■) (described later). Determine (#40
07).

If the card function is OFF, the E2PR inside the camera
Based on the OM information, the AF is controlled in the previously stored AF mode.

On the other hand, if the card function is ON, it is determined whether or not it is a custom card, and if it is not a custom card, the AP mode is controlled based on the information in the E2FROM inside the camera.

If it is a custom card, data communication (■) (described later)
AF control is performed based on the AF information set in the card input from the card.

The control is the same when determining the AF mode with the E2PROM in the camera and when determining the AF mode with the E2PROM in the custom card, only the data used is different. This is done only when determining the

The microcomputer (μC) reads information from the E2PROM in the camera and determines whether or not the AF mode is the focus lock mode in step ($14010). Here, if you are in focus lock mode, switch (8)
Focus lock bit (Fb+a) by Q)
and set the bit indicating the auxiliary light mode (Fb+s
), and if the tracking mode display is on, reset the flag (tracking F) to turn it off (#4020 to #403).

This is because in the focus lock mode, since AP operation is prohibited, there is no need for subsequent AP operation, so the emission of the auxiliary light required for this is prohibited, and the power is dissipated.

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

Next, determine whether the AF mode is spot AP (
#4035). This step (#4035) also comes when the focus lock mode is not set in the above step (#4010). If it is Spot AF, it is determined in step (#4036) whether or not the flag (SQONF) indicating that this flow has passed is set for the first time when the switch (SQ) is turned on. If not, proceed to step (#4037) and switch (S).

) To memorize the multi-point/spot mode before turning on, move the contents of bit (Fb2) to bit (Fb+s) and reset the above flag (SQONF) $1403
8), in step (#4040), set the spot mode to Fb2=1), and proceed to step (#4045). Also, if the flag (SQONF) is set, step (#4037) etc. is skipped and step (#404
Proceed to 5). In step (#4045), it is determined whether or not it is continuous AF, and if it is continuous AF, the bit indicating this (Fb8 = 1) should be set (#4050), and the bit indicating auxiliary light (Fb13) is reset at step ($14055) and returns.

It is now assumed that the auxiliary light mode for the continuous AP is prohibited in consideration of power saving.

With continuous AP, focus adjustment never ends.
This is because if the auxiliary light is emitted every time focus detection (integration) is performed, the battery, which is the power source, will be consumed quickly and the number of films that can be photographed will be reduced. Step (#40
45), if it is not a continuous AP, return immediately. In addition, in the flow when the switch (So) is on, only one of focus lock, spot AF1, or continuous AF is set on the IC card, so for example, step (#
4010), the focus is locked, NO in steps (#4035) and (#4045).
becomes.

In step (#4000) above, switch on the lens side (S)
.

) is OFF, the process advances to step (#4060). In this step (#4060), the bit (Fb+a) indicating the focus lock function is reset.

A spot AP is selected by the switch (8Q), and it is determined whether or not the control is to be performed immediately after the switch (SQ) is turned off by whether or not the flag (SQQNF) is set (#4065). If set, the bit (
By transferring the contents of bit (b2) to bit (b2), multiple points/spots before being selected by spot AF by the switch (SO) can be obtained (#4070). Then, reset the flag (SQONF) and step (#4087)
Proceed to. In step (#4065), the flag (SQ
ONF) is not set, it is determined whether it is forced spot AF using an IC card (close-up card), and if it is forced spot AP, the bit (Fb2) is set to indicate spot AF, and step (64087) Proceed to. If it is not forced spot AF, step (#408
Skip step 5) and proceed to step (#4087). Next, in step (#4087), it is determined whether or not it is forced continuous AP based on the signal input from the card (sports card), and when it is forced continuous AF, a bit indicating this (Fb@ ), reset the bit (Fbxs) to disable the auxiliary light mode, and return (#4088, #4089)
. One-shot AP when not forced continuous
Reset the bit (pbs) to indicate (#4090)
and return.

After determining the AF mode described above, the microcomputer (μC) performs card data communication (It) with the IC card (CD) in order to determine the type of the IC card (CD) (#42
0).

This card data communication (II) will be explained with reference to FIG. 5(b).

In this data communication, the camera first sends data indicating data communication (I[) to the card (one serial communication) (#320 to #327), and then the camera becomes the input side (#330) and waits. (#332) L,, perform serial communication 10 times to obtain 10 bytes of data (#3
35). To briefly explain the contents of this data, the first 4 bytes are data for controlling individual functions of the camera depending on the card (details will be described later).

Next 5th. The 6th byte is a missing byte, and the 7th byte is a missing byte. The 8th byte specifies the number and start address of data to be output during subsequent data communication (■) (camera input), and this is called a "directly specified address type." Next 9th. The 10th byte is used to input the necessary data by specifying the group of data to be output to communication (■) and communication (IV). In particular, the 9th byte is for communication (■)
, the 10th byte indicates communication (■), and this is called a "group designation type". These two specification methods are specified in the 3rd byte bit (b6) of the 4 bytes above.
By switching between cards and transmitting only the necessary data, the system efficiently saves time. Then, returning to FIG. 6, it is determined whether or not the AF prohibition data input in communication (n) is set (#425). If it is not set, or if self-timekeeping is not in progress (SLP=0), It is determined whether the AF start switch (S+) is turned on or not based on the level of the terminal (IP6) (#427). The above switch (S
, ) is ON (IPs='L J level), AF is controlled (#429) and the switch (S,
) is set to ON (S, 0NF) (#
430).

AF based on the data input from the card during communication (n)
When prohibited data is set, or when self-timekeeping is in progress, or when the switch (Sl) is set to 0FF (IP
s = r HJ level), output a signal to stop the AF drive motor to the lens control circuit (LECN) to stop the lens drive in order to prohibit AF operation #43
1) Flag indicating that AF is not being performed (AFNF
), set #435), and switch (Sl)
Reset the flag (S+0NF) indicating ON (#
437). When the data setting mode is set in this way, by prohibiting AF control and giving priority to data setting in the card example, it is possible to prevent AF from accidentally activating during data setting.
Even if the start switch (Sl) is pressed, the AF operation is not performed. When the flag (AFNF) is set, a signal (AEFLAG b+) indicating that image magnification data cannot be used is converted to rQJ and output to the card during data communication (III).

Here, regarding the above-mentioned AF control, FIGS. 12(a) to 1
The flowchart shown in FIG. 2(h) will be explained with reference to FIG. 14, which shows the focus detection range in the photographic screen. At that time, the photometry range will also be explained.

First, in FIG. 14, the outer rectangle (12) indicates the photographing screen. Among them, (LMI) to (LMa) indicate the photometry range, and (API) to (AF3) indicate the focus detection range.

Regarding the focus detection range, the camera has a spot/focus detection range.
Multi-point AF can be switched, and when spot AF is selected, AF is performed based on subject information in the focus detection range (AF2), and when multi-point AF is selected, the above three ranges (API ) to (AF3), AF is performed to focus on the subject closest to the camera. Hereinafter, (API) is the first island.

(AF2) will be called the second island, and (AF3) will be called the third island.

To explain the AF control shown in the flowchart of FIG. 12(a), first, in order to detect whether the AF start switch (S, ) is pressed for the first time, a flag (S+0NF) is determined and set. If not, the flag indicating focus (AFEF), the flag indicating low contrast scan inhibition (LSIHF), and the flag indicating the beginning of low contrast scan (LSFI) are reset (#702. #703. #704), step (
Proceed to #705).

Note that the low contrast scan and these flags will be described later. When set, step (#702
) directly without going through steps (#705) to (#7
Proceed to step 04). Then, it is determined whether the lens is attached based on the input signal from the lens (#705)
. If the lens is not attached in step (#705), a flag (AFNF) indicating that AF is not being performed is set and the process returns (#800).

When a lens is attached, forced AP mode (AF is forced even if manual focus adjustment is selected)
mode and enables lens drive by motor)
Determine whether or not is selected by the card (#7
07), if in forced AF mode, step (#71)
Proceed to 1). On the other hand, when it is not forced AF mode, you can check whether the focus adjustment mode is AP mode/M mode by terminal (I
When the AF mode is in step #71, the bit (Fb+a) determines whether the focus lock mode is selected in step (#711).
). When in M mode, step (
#798) disables the auxiliary light mode (Fbts=,
After executing the manual focus subroutine (MFOCUSI) in the next step (#799), set the flag (AFNF) indicating that AF is not being performed.#
800), determine whether or not the image is in focus (#780), and if the image is in focus, set the flag (AFEF) ($1781); if the image is not in focus, reset it (#782), and return.

This manual focus subroutine is shown in Figure 12 (
As shown and explained in d), first, a flag (MFF) indicating manual focus is set, and integration control is performed to control integration and execute data dump. In manual focus, a flag (AF2F) indicating the second island among the three islands in the AF area is set, the day focus amount (DF2) of this island is calculated, and this is set as the day focus amount and returned ( #
4100~#4110).

The integral control subroutine in the above step (#4101) is shown in FIG. 12(b) and will be explained first. , the process proceeds to step (#4163) without emitting the auxiliary light (#4150.
#4155). When focus detection is not possible and the auxiliary light mode is set, the terminal (OLD) is connected for a certain period of time to emit light before the start of integration and emit light for a certain period of time.
(Change to J level and proceed to step (#4163) (#
4150~#4180).

In step (#4163), the count (CT) of the feeding amount (the number of feeding pulses) is read, and (c'r+)
Make it.

Next, perform integration and count again after the integration is complete (CT)
Read and set this as (CT2) (#4165.
#4167). The average of (CT+) and (CT2) is calculated, data is input (dumped) as (CT12), and the process returns. (#4168, #4170).

Returning to FIG. 12(a), if manual focus adjustment is not selected in step (#710), or if forced AP mode is selected in step (#707), check whether focus lock mode is selected in step (#711). Determine whether

As a result of the determination in steps (#710) and (#711),
In AF mode, if focus lock is selected with the switch (So), the lens drive is stopped in step (#712) and the flag (AFE
Check whether F) is set #713),
If it is set, proceed to step (#714), control the M focus, and then proceed to step (#780).
Proceed to. If it is not set, step (#79
Proceed to 9).

The reason for determining focus here is that if the focus is locked after focusing, you want to use the distance data of the subject at the time of focus (used for image magnification) to determine the photometric value. It is.

When AF is determined in step (#710) of FIG. 12(a) and focus is not locked (Fb14=0) in the next step (#711),
5), the flag indicating that AF is not being performed (AFNF
), and at the same time, a flag (MFF) indicating manual focus is reset in step (#717). The microcomputer (μC) controls the accumulation (integration) of the charge generated according to the amount of incident light in the COD for distance measurement, and after the integration is completed, the data obtained by digitally converting the integral value is input (#720 ). Then step (#730
) to detect whether it is spot AF (detected by Fb2 of the function data), and if it is spot AF (Fb2 = 1), proceed to step (#735) and execute the spot AF subroutine shown in FIG. 12(d). Execute. In this subroutine, a flag (AF2F) indicating that AF is being performed is set based on the second island, and the day focus amount (DF2) of the second island is determined from the input data.
is calculated and set as the day focus amount for lens driving (#4102 to #411).

On the other hand, in step (#730) of FIG. 10(a), multiple points A
When F mode is selected, step (#74
0) and executes the normal AF control subroutine shown in FIG. 10(C). At that time, 1. Second. The day focus amount (DF) of the third island is calculated, and among the above, the day focus amount for the subject closest to the camera is calculated (#4200 to #4215).

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

In FIG. 12(f), the microcomputer (μC) first resets the flag indicating the island (AFIF - AF3F), detects the largest day focus island, and converts the detected island day focus amount into the lens driving day focus amount. , set the above-mentioned flag (AFIF - AF3F) according to the island and return (
#810 to #865).

After calculating the day focus amount, it is checked in step (#745) of FIG. If it is low, focus detection is disabled) If focus detection is not possible, proceed to step (#747) to determine whether or not it was in the auxiliary light mode, and if it was in the auxiliary light mode, further focus detection is performed. It is useless to do this, so please set a flag (LCONF) to indicate this.#
752), resets a flag indicating that it is the tracking mode (described later) (#755), and returns. In step (#747), if it is not the auxiliary light mode, proceed to step (#757) to detect whether the brightness is low or not, and if the brightness is not low, it is useless to emit the auxiliary light.
Controls low contrast scan. Low contrast scanning refers to performing focus detection while driving the lens to search for a focus detectable area when focus cannot be detected. To explain this as shown in FIG. 12(h), it is determined whether or not a flag (LSIHF) indicating that a focus detectable area was not obtained even though low contrast scanning was performed is set (#4400). ). When it is set, it is useless to perform low contrast scan any more, so return. If not set, it is determined whether a signal indicating prohibition of low contrast scan is input from the card (#4405). If it is input, return without performing relow control scan. If not entered, a flag (LSF
I), #f to determine whether it is set or not $144
10) If it is not set, please set this #
4415), flag indicating the feeding direction (FWF)
(#4420), and set the lens drive amount n to a positive value (K large) that is larger than the maximum lens extension amount (#4420).
4425), the lens is driven to extend.

When the flag (LSFI) is set, it is determined whether the lens has reached the extreme end of extension or the extreme end of extension (#4430), and if it has not come, return. If the lens is stopped, it is determined in step #443 whether or not the lens was extended before the stop (step #444. For this ultimate detection, a hard timer (not shown) is working, and this hard timer It is reset and started every time a pulse from the encoder arrives.When this timer has counted a certain period of time, it detects the extreme end of extension or the extreme end of retraction as a state in which the lens cannot be driven.And if it is extended ( FWF=1) Reset this (#4445), and next time set the lens drive amount to -(K large) to control the renormalization (#445)
, return.

When the flag is not set, it is useless to perform low-contrast scans even if both carry-out and carry-out are performed, so the flag (LSIHF
) (#4455) and return. Then, the process proceeds to (#752), and the process proceeds to step (#752), where the same processing as described above is performed.

On the other hand, if the brightness is low in step (#757) of FIG. ) to prohibit AF using the auxiliary light, and if it is not in the prohibition mode, proceed to step (#
760), the auxiliary light mode (Fb+s:1) is set, and the process proceeds to step (#755).

Next, if the microcomputer (μC) is not unable to detect the focus,
The flag (LCONF) should be reset (#762), and step (
#765), and if it is in focus, set a flag (AFEF) indicating the focus state (#767) and set the flag (AFICIF) and step (#755)
Proceed to.

If the focus is not in step (#765), step (#765)
Step #775) executes a subroutine for lens drive control, and then returns. This subroutine is shown in FIG. 12(e) and will be explained. It is determined whether a flag (following F) indicating the following mode is set (#424
8). If it is the follow mode, proceed to the switch (#4330). When the flag (tracking F) is not set, either one-shot AF (-once the lens is focused, further lens driving is stopped, and focus detection may also be stopped at this time) or continuous AF (after focusing Determine from data (Fbs) whether the lens follows the subject and drives the lens according to the determined day focus amount (#4250);
In the case of one-shot AF (Fbs=O), check whether the flag (AFEF) indicating focus is set (#425).
5), and if it is not set or if continuous AF is used (Fbs=1), step (#
4330) and (#4335) to step (#43
Proceed to step 40) to control lens drive. Step (#
In step 4330), the flag (AFEF) indicating focus is reset, in step (#4335), the lens drive amount is determined, and in step (#4340), the lens is driven, and the process returns. In addition, in the lens drive in this step (#4340), the lens drive circuit (LECN) performs the above drive amount (N
) by driving the lens by a value corresponding to .

FIG. 12(g) shows the subroutine for determining the amount of lens drive described above. The microcomputer (μC) determines whether or not the flag (following F) indicating the tracking mode is set (#4341). If not, proceed to step (#4345). When the flag (tracking F) is set, the day focus amount (DF) obtained this time is set to (DPI) (#4342). Then, the day focus amount DF; DF+(DF-DF2)CDFe is the previous day focus amount, that is, the difference between the previous and current day focus amounts is added to this time), and (DPI) is (D
F2) and proceeds to step (#4345). In step (#4345), the lens drive amount (N) is determined by multiplying the determined day focus amount by the value . Read the number of lens extension pulses at that time and set it as (CTa), ΔC
Ts CTl2 calculates ΔCT as the amount of movement of the lens from the center of integration, subtracts 80T from the above N to find the amount of lens drive at the end of the calculation, and returns (14346).
~($14348).

In step ($14255), when the flag (AFEF) indicating that the image is in focus is set, the process advances to step (#4257). And forced one-shot AF
It determines whether or not it is, and returns immediately if forced one-shot AF is used. This prohibits tracking mode during forced one-shot AF. When the tracking mode is a normal one-shot AF mode that is not prohibited, it is determined whether a flag (AFEIF) indicating when the focus is brought from an unfocused state is set (#426).

When set, it performs preparation processing for tracking determination (determining whether the subject is moving), which will be described later.
First, in step (#4265), the registers (DF2) and (DF3) that store the day focus amount are reset, and the obtained day focus amount (DF) is stored in the same register (DFI) (#4270). Set variable (N) to O (#4275), above (AFEI
F) (#4280) and return. In step (#4260), after focusing (AFEF=1
), when performing focus detection from the second time onwards (AFEIF=0
), proceed to step (#4285), and sequentially memorize the day focus amount in the register that stores the day focus amount [The contents of the register (DF2) are stored in the register (D
Fs), the contents of the register (DPI) are transferred to the register (DF
2), store the obtained day focus amount (DF) in the register (
Add 1 to the variable (N) and determine if this (N) is 2 or more, that is, whether focus detection has been performed 3 times after focusing, and if it is less than 2 times, do not drive the lens. Return (#4285~$14305).

In step (#4305), if it has been performed three or more times (N≧2), proceed to step (#4310),
The day focus amount is determined by the average of the past three day focus amounts (the average of the contents stored in the register), and in the next step (#4315) it is determined whether this value is greater than or equal to a predetermined value. This means that it has been determined in the past three focus detections whether the subject is moving at a predetermined speed (on the image plane). When the value is less than the predetermined value, it is assumed that the subject is not moving, and the tracking flag is reset (#432).
0), return.

This flag is used for display (infinder). On the other hand, when the day focus amount is more than a predetermined value,
When the subject is moving, the flag (
Set tracking F) (#4325), calculate the amount of lens drive, drive the lens, and return (#4330.
#4340).

Here, the display in the finder regarding focus detection will be explained based on the display in the finder shown in FIG. When it is set based on F), the green LED lights up, and when it is not set based on F=0), it turns off. Further, when the focus cannot be detected (LCONF=1), the red LED is blinked, and otherwise (LCONF=0), it is turned off. (102) indicates the focus detection area, and when the internal area (102) is displayed, it indicates spot AF,
When only the outer region (102b) is used, multi-point distance measurement is shown. (103) is displayed when the mode for continuous AF or tracking mode is indicated (following F=1), and is turned off when the mode is not continuous AF or tracking mode. (104) rAF/MJ is AF display when in AF mode (AFNF=O), and in other cases (AF
NF=1) performs M display. In addition, the AF switch (S,)
When is OFF (S+0FF=0), the display in the viewfinder is turned off.

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

This is illustrated and explained in FIG. 15. Based on the data input from the card, whether or not the display control mode (data setting) is in progress is determined from the data input in communication (II) #90
5) If the mode is display control mode from the card (during data setting), return. When not in the display control mode, it is determined whether a flag (SLP) indicating that time is being measured in self mode, which indicates that time is being measured in self mode, is set (#907). Returns when set. If it is not set, it cannot be determined whether the exposure mode change switch (SEM) is turned on.#
910), when it is ON, proceed to this change subroutine (#915) and return (details will be described later)
. If the above switch (SEM) is not turned on, proceed to step (#920) and function change switch (S
FUN) is turned on. When this switch (SpuN) is turned on, the process proceeds to the subroutine for changing it (#925).

Here, the above two subroutines are shown and explained in FIGS. 16 and 18, respectively. First, the exposure mode is changed.
Each time the up switch (Sup) is turned on, the process progresses cyclically from P to A-4S to M and then back to P, and each time the down switch (Sdn) is turned on, the process progresses sequentially to P4. -A-3-M, then P and then M, cyclically in the opposite direction to the up direction, but depending on the E2FROM data in the camera or the data in the custom card. , is changed according to the exposure mode set by the IC card (CD), and unselected modes are skipped.

To explain this with reference to FIG.
) is 0N1 of the card function input in data communication (II)
Based on the 0FF signal, it is determined whether the card function is ON or not (#1000). If it is not ON, the camera enters control. If it is ON, it is determined whether it is a custom card or not (#1001); if it is not a custom card, it is determined whether a forced P mode signal is input from the camera or not (step #1001).
#1002), and if the forced P mode is set, the P mode is set (#1003) and the process returns. If it is not the forced mode, in-camera control is entered to determine the AE mode among the settable AE modes stored in the E2PRO old memory in the camera. On the other hand, if it is a custom card, the data sent through data communication (IV) (EEC3TM=0
．． Based on step 1), the AE mode is determined from among the settable AE modes stored in the card.

The only difference in the selection of P, A, S, and M modes is the data to be selected (camera E2FROM, card data), and the selection control is exactly the same, so the explanation will only be about the control performed using the data in the camera's E2FROM. Make it.

The microcomputer (μC) determines whether or not the up switch (Sup) is turned on in step (#1004), and if it is not OK, the microcomputer (μC) determines whether the up switch (Sup) is turned on or not, and if it is not OK, the microcontroller (μC) determines whether the up switch (Sup) is turned on or not.
Proceed to.

If it is ON, proceed to step (#1005) and read (Fbo) (Fb) of the RAM function data (Fbn).
+ ) to determine whether P mode is currently selected as the control exposure mode, and if it is selected, proceed to step (#1010) and check whether A mode is selectable from the internal E2 FROM. If it is selected, change the exposure mode from P to A (#1015) and change the function data (Fbo, Fb+) to (
Change from 0,0) to (0,1) and return (#10
15). In the above step (#1010), when it is determined that the A mode is disabled, the process proceeds to step (#1025), where it is determined whether the S mode is selected, and here it is determined that the S mode is not selected. In some cases, the process further advances to step (#1040) to check whether the M mode is selected and to sequentially search for selectable modes. Then, if there is a selectable mode, it is set. And A, S,
When M mode is not selectable, that is, only P mode is selectable, P mode is selected (
#1050).

Similarly, when A mode is currently selected as the control exposure mode (Fbo, Fb+ = 0.1),
Determine whether S mode is selectable, and if not selectable, determine whether M mode is selectable, change the exposure mode to the selectable mode, bit (Fbo), Change (trb+) and return (#1020 to 1030).

Now, when S mode is selected as the control exposure mode (Fbo, Fb+ = 1.1), it is determined whether M mode is selected, and if it is selected, it is set as M mode, and if it is not selected, it is set as M mode. is set to P mode and returns (#1035 to #1045). When the control exposure mode is not the S mode, that is, when it is the M mode, the mode then becomes the P mode. This is because the P mode is always selected in this embodiment.

In step (#1055), the down switch (Sd
When n) is turned on, the same control as the up switch (Sup) described above is performed except that the direction in which the exposure mode is changed is different, so a description thereof will be omitted.

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

Next, the function change switch (SpuN) shown in FIG.
The control when the result is N will be explained. The microcomputer (μC) executes the flow after the data change step (#1205). The microcomputer (μC) determines whether the switch (SsE) indicating the function to be changed is turned on (#1205), and if it is turned on, determines the function to be changed from the bits (Fbs, Fb+o). #1225
), +/-+3/C-+S/A, then return to +/- after S/A, and so on.
Change the data of bits (Fbo, Fb+o).

In step (#1205), the switch (SSE)
If not turned on, the process advances to step (#1265). In step (#1265), the up switch (S
UP) is turned on, and if it is turned on, the data (Fb
e, Fb+o) (#1280), and if the function is in +/- mode (#1285), the exposure compensation amount (
The process proceeds to a subroutine (#1287) in which 0.5 is added to ΔEv) and its size is determined. This subroutine is the first
As shown in FIG. 8, if the correction amount (ΔEv) is positive, data Fba, Fbs = 0.1 is used as a positive correction, and if it is a negative correction, data Fb4. Fbs=1. O, and if the correction is zero, data Fb is assumed to be no correction.
4. Return as Fbs=O,O (#1350
~#137.

Returning to FIG. 17, in S/C mode, data (F
bs) to determine whether the current mode is single shooting (S) or continuous shooting, change the data so that it is opposite to the current mode (#1295), and return. The above two modes (
(10/- mode, S/C mode), that is, S/A mode, the current mode is Spot AF.
(S) or multi-point AF (A) based on the data (Fb2), and set the data (Fb2) so that it is opposite to the current mode.
Change Fb2) #1300) and return.

In step (#1265), the up switch (Su
p) is not turned on, the process advances to step (#1305), where it is determined whether the down switch (Sdn) is turned on, and if it is not turned on, the process returns. If it is ON, the exposure compensation amount (Δ
Except for subtracting 0.5Ev from Ev), the flow is the same as the flow when the up switch (Sup) is ON, so the explanation will be omitted (#1310 to #1340).

Returning to FIG. 12, the exposure mode change switch (SEM).

If both function change switches (SFUN) are OFF, the up switch (Sup) and down switch (Sd
The process advances to step (#927) showing a subroutine for changing the aperture value (Av) and shutter speed (Tv) according to n).

This subroutine is shown in FIGS. 22(a) and 22(b), and will be explained first.
Step (#1800)
), and if it is not turned on, step (#18
The process proceeds to step 05) and determines whether or not the down switch (Sdn) is turned on. If it is not turned on, the process returns. When the up switch (Sup) is turned on,
Proceeding from step (#1800) to step (#1810), it is determined whether or not the M mode is set. When the mode is M mode (Fbo, Fb+ = 1. O), proceed to step (#1811) and determine whether or not the aperture change switch is turned on. If it is turned on, proceed to step (#1830) described later. Proceed to the following steps, and if it is not turned on, step (#1850) to change the shutter speed.
). First, to explain how to change the shutter speed, add 0.5Ev at step (#1850) and step (
11855). In step (#1855), it is determined whether or not the set shutter speed exceeds the maximum speed (Tvmax), and only if it exceeds, the process is limited to the maximum speed and returns (#1860). If not, skip step (#1860) and return.

If the mode is not M mode in step (#1810), it is determined whether the mode is P mode or A mode in steps (#1815) and (#1820). When the mode is P mode (Fbo, +:0.0), it is determined whether or not P shift is prohibited (#1817), and if it is prohibited, the process returns. If it is not prohibited, proceed to step (#1830). In step (#1830), 0°5Ev is added to the aperture value (Av), and it is determined whether this exceeds the maximum controllable aperture value (AvmaX) (#1835). If it exceeds the aperture value (Av
) #18 Please set the maximum aperture value (Avmax) as
40), if it is not exceeded, do nothing and step (#
1845) to determine whether it is in P mode, and
If the mode is selected, the process advances to step (#1879) of the flowchart in FIG. 22(b).

Returns if not in P mode. Step (#18
15) and when it is not P mode, (Fbo, +≠0,0
), to determine whether it is in A mode #1820), A
If the mode is (Fbo, Fb+ = O, O), proceed to step (#1830) and perform up control of the aperture value (Av), and if it is neither, that is, S mode (Fbo, Fb+ = 1.1). ) is step (#18
Proceeding to step 23), the shutter speed (Tv) is increased.

When the down switch (Sdn) is turned on in step (#1805), step (#1805) in FIG.
1865), determines whether the mode is M mode, and
mode (Fbo, Fb+ = 1.O)
, determine whether the aperture change switch (S. #1905)
Proceed to. In step (#1905), subtract 0.5Ev from the set shutter speed and determine whether this is slower than the camera's minimum shutter speed (Tvmin).
1907), if slow, limit the shutter speed to the lowest shutter speed #1908), otherwise return without doing anything. When the aperture change mode is determined in step (#1877) (SauON), the aperture value (Av) is decreased by 0.5Ev in step (#1885), and then that value is set to open in step (#1890). Aperture value (A
vo), and if it is smaller, the aperture value is set as the open aperture value (Avo) (#1895).

In the step (#1890), the aperture value (Av)
is not smaller than the open aperture value (Avo), step ($11895) is skipped and step (#190
Enter 0). If the determination in this step (#1900) is that the mode is P, the process proceeds to the control flow for increasing the aperture value (#1850 to #1860) shown in FIG.

In step (#1865), if the mode is not M mode, it is determined in step (#1870) whether or not the mode is P mode. Here, when in P mode (Fbo, I; O
, ■, Determine whether P shift is prohibited #1
872), returns if prohibited. If it is not prohibited, the process advances to step (11885).

When not in P mode in step (#1870) (
Fbo, 1≠0,0), proceed to step (#1875) and determine whether it is A mode. If it is A mode, proceed to the flow for controlling the aperture value reduction after step (91885), otherwise Assuming that you are in S mode,
Proceeding to step (#1879), the shutter speed is controlled to be reduced.

In FIG. 15, after controlling the settings of (Av) and (Tv), it is determined whether the normally open self-switch (SHELP) has been turned on. When OFF (IPI2” r HJ
) returns immediately.

The self subroutine when ON (IP+2='LJ) is shown in FIG. 19 and explained. When the flag (SgLFF) indicating self mode is set, it is reset L (#945) and the self mode is set. If it is not set, the flag (
SELF) (#950) and return.

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

In FIG. 20, the microcomputer (μC) first determines in step (#1600) whether or not a flag (AELF) indicating AE flock is set, and then
When F) is set, the photometric value is not updated and the process returns. When the flag (AELF) is not set, the terminal (C8LM) is set to "H" level, the photometry circuit (LM) is commanded to output photometry data, and serial communication is performed ($11605. #161
0).

Through this communication, the brightness values (Bv+ to Bv4) of the four photometric ranges shown in FIG. 14 are input. When communication is completed, set the terminal (C3LM) to "L" level (#1815)
, Then, in step (#1617), convert Bvc to Bv
Enter the value of 2, and in step (#1618) BLIAII
E to (#1622), it is determined whether the flag (AFNF) indicating that the camera is not in AP mode is set, and further, in step ($11624), the flag (LCONF) indicating that focus detection is not possible is set. If either one is set, the process proceeds to step (#1660) and the small photometric range (LM2) at the center is set as the spot value (Bvsp). When the flags (AFNF) and (LCONF) are not set, the distance is calculated from the feeding pulse, and the image magnification β is determined based on the calculated distance information and focal length information.
It is calculated from the focal length/distance (#1625), and in the next step (#1630), it is determined whether this image magnification β is greater than or equal to a predetermined value (K), and the size of the subject that occupies the shooting screen is determined. decide. If it is greater than or equal to the predetermined value, it is assumed that the subject is large, and in step (#1640) each photometry range (
Luminance values (Bv) of (LMI), (LM2), (LM3)
+ ), (BV2), and (BV3) are taken as the spot photometric value (Bvsp).

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, which flag (AFIF to AF3) among the flags indicating the focus detection range is selected.
F) is set, determine its range, and if the flag (AFIF) is set, the photometry range (
If the flag (AF2F) is set, the brightness value (Bv+) of the photometry range (LM2) is set.
BV2)N When neither flag is set, that is, when the day focus amount of the third island (AlI3) is selected, the brightness value (Bvs) of the photometry range (LM) is set as the spot photometry value (Bvsp). (
#1645 to #1665).

After determining the spot photometry value in this way, the microcontroller (
μC) proceeds to step (#450) in FIG. 6 to control the AE flock, which will be explained with reference to the flowchart shown in FIG.
#1740) AH lock switch (SAEL)
Determine whether or not it is turned on, and if it is not turned on, reset the flag (AELF) (#1755)
. When it is ON, set the flag (AELF) (#1745), reset and start the timer (T, ) for maintaining power supply (#1750), and spot photometry value BV.
2 as the spot value (Bvsp) (#1752) and returns. In this way, the AH Rotuta switch (S,,,ε
When L) is turned on, the power is maintained.

In FIG. 6, after controlling this AE block, the microcomputer (μC) performs data communication with the card for the third time in step (#455). To explain this data communication with reference to FIG. 5(c), the microcomputer (μC) determines whether communication (I [I) exists or not based on the signal input from the card, Returns when there is nothing.

It is empty when no card is installed. Communication (I[
I), set the terminal (C8CD) to rH, level (#350), set the data (#352), and output the data to the IC card (CD) (#355).

Next, communicate once (#357) and wait (#36)
0) Execute the data output subroutine (#362),
After finishing data output, the terminal (C8CD) is set to "L" level (#365) and returns.

This data output subroutine is shown in FIG. 5(g) and will be explained. First, it is determined from the data communicated at the time of communication (n) whether or not a group is specified (#362-1).

If it is a group designation (sports card, snap card, etc.), group designation G. , Gl, G2. Controls the output of the G3 group data to the card. First, the address of group Go is set #362-2), and serial communication is performed 15 times (#362-3).

Go, Gl, G2. G3 data is lens drive and AE
With the data for calculation, Tvc... Control shutter speed Ga L
pmax...maximum lens extension amount, and then it is determined whether data of group GI is necessary or not based on the data obtained in communication (n) (#362-4). Return if not needed. If necessary, set address G+ of G1 data (#362-5) and perform serial communication three times (#3
62-6). Next, it is determined whether or not the data in G2 is necessary, and if so, address G2 is set and serial communication is performed twice. Next, it is determined whether data 03 is necessary, and if so, address G3 is set, serial communication is performed once, and the process returns. If the group is not designated, an address is set based on the address with the necessary data input from the card #362-7), and serial communication is performed for the number of serial communications input from the card (#362-8). Note that there is no addressing type in communication (1).

Upon completion of the above-mentioned card data communication (III) in FIG. 6, the microcomputer (μC) proceeds to step (#460) and performs exposure calculation here.

The flow of this control is shown and explained in Figs. 23 to 27. In Fig. 23, the microcomputer (μC) first outputs the light emission signal, which is the output data to the electronic flash device, by forcing 19 0N=O
, Forced 0FF=O, GN control release Initialize to 20 (
#2000 to #2003). Next, step (#200
In step 4), it is determined whether the lens is attached or not based on the input lens data, and if it is not attached, the photometry value (Bvon) of the photometry range (LMa) (instead of this, the overall average is Calculate the shutter speed by adding the film sensitivity (Sv) and exposure compensation value (△Ev) to the photometric value (may be a photometric value) and return (# 2005)
. If a lens is attached, it should be determined whether it is forced P mode or not based on the data input from the card #2006
), in forced P mode, returns without performing exposure calculation. If it is not the forced mode, exposure calculations are performed according to each exposure mode (#2010 to #204).

Therefore, the exposure calculation for P mode is shown in Fig. 24 (a) to (c).
To explain it as shown in the figure, the microcomputer (μC) first
In step (#2100) of figure (a), the determination of the backlight condition is determined by the photometry value (Bv□) of the photometry range (LMa) and the spot photometry value (Bvsp) obtained in step (#445).
Judgment is made based on whether the difference is 2Ev or more (#210
0). If it is 2Ev or more, it is determined in step (#2105) whether an electronic flash device is installed (switch SPI of the electronic flash device is ON), and if it is installed,
The control exposure value (Ev) is changed to the photometry value (LMa) of the photometry range (LMa).
EV= BVAM + Avo+5 from BVITM) etc.
Calculate by v-1+ΔEv ($2115). Here, l is subtracted to make the background appear to be IEv over to make it look like it is backlit. In addition, I am trying to properly expose the main subject using a flash from an electronic flash device.

Then, proceed to the program subroutine (#2120) that determines the aperture value (Av) and shutter speed (Tv).
Further, in step (#2170), forced ON is set and the process returns.

The program ① is shown in FIG. 24(b) and explained as follows.
Tuning the shutter speed control value (Tvc) = 7
(88 = 1/125), find the aperture value (Av) by subtracting 7 (shutter speed) from the exposure value (Ev),
It is determined whether this aperture value (Av) is greater than 7 (F=11), and if so, the control aperture value (Avc) is limited to 7 and the process returns (#2215). When the aperture value (Av) is 7 or less, the calculated aperture value (Av) is equal to the open aperture value (
Determine whether it is smaller than Avo), and if it is smaller, set the open aperture value (Avo) to the control aperture value (Avc) #22
25) If it is not smaller, the calculated value (Av) is set as the control aperture value (Avc) (#2230). And set it to 1 to cancel the GN restriction of the electronic flash device ($2235)
At the same time, a light emission signal is set (#2240), and the process returns. This is because the aperture is retracted and the GN
This is because if you limit the main subject, it may not be possible to photograph the main subject properly with strobe light.
It also takes into account that the photographer has little intention.

Returning to FIG. 24(a), in step (#2105), if the electronic flash device (FL) is not installed, the control exposure value (Ev) is set to the spot value in the photometry range in order to properly expose the main subject. (Bvsp) etc., EV==Bvs
Find p+AVO+Sv+△Ev (#2130), proceed to subroutine (#2135) of program ■ to find aperture value (Av), and shutter speed (Tv), and proceed to step (#2130).
2170) and then returns.

This subroutine is shown and explained in FIG. 24(c).
First, in step (#2250), set the aperture value (Av) to Av=
Find this aperture value (Av
) is larger than the maximum aperture value (Avmax) of the lens (#2255), and if so, the maximum aperture value (Avmax) is set as the control aperture value (Avc) (#22
60), proceed to step (#2280). Step (#
2255), the aperture value (Av) is the maximum aperture value (Av
max), the aperture value (Av) is equal to the maximum aperture value (Av).
v.

), and if it is smaller, the open aperture value (Avo) is set as the control aperture value (Avc), and if it is not smaller, the calculated aperture value (Av) is set as the control aperture value (Avc). ) (#2265 to #227
5).

In 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), it is determined whether this is greater than the maximum shutter speed (Tvmax), and if it is, the control aperture value (Avc) is Shutter speed (Tvc) (
Tvmax) (#2290), if it is not larger, then in step (#2292) it is determined whether or not it is slower than the slowest shutter speed (Tvmin), and if it is slower, (Tvmin) is controlled. Toshiku #2
293), if not slow, calculate shutter speed (Tv)
Control shutter speed (Tvc) and #2295),
Reset the light emission signal (:0) to prohibit light emission (#2
298), return.

Returning to FIG. 24(a), in step (#2100), when the difference between BuAn -Bvsp is less than 2, it is determined that there is no backlight condition and the process proceeds to step (#2145), and the average of the photometry range (LMI) to (LM4) is Photometric value (Bv+ +
Ev2 + Bv3+ Bva )/4 to exposure value (
Ev), determine the aperture value (Av) and shutter speed (Tv) using the program ■ mentioned above (#2150), and set the shutter speed (Tv) to the camera shake warning speed (Tv=
6. Determine whether it is less than 1/60) (#215
5), When the speed is less than the camera shake warning speed, it should be determined whether an electronic flash device is installed or not #2160
), if it is attached, execute strobe light emission program I (#2165) and return.

When not installed (including when the flash device is turned off)
, sets forced ON in step (#2170) and returns. If the camera shake is less than the warning, return without doing anything.

Next, Fig. 25 shows a flowchart for determining the aperture value (Av) and shutter speed (Tv) in A mode. First, it is determined whether or not an electronic flash device is attached. If so, control shutter speed (
Tvc) is 7 (1/125), and the set aperture value (Av
) as the control aperture value (Avc) (#23
00, #2305 and #2345). If it is not installed, calculate the exposure value (Ev) from the average metering value, and subtract the set aperture value from this exposure value (tCV) to determine the shutter speed (Tv) (#2315. #2320
). Then, in the next step (#2325), the shutter speed (Tv) is set to the maximum controllable shutter speed (
If it is larger than the maximum shutter speed (Tvmax), in step (#2330) the maximum shutter speed (Tv
max) as the control shutter speed (Tvc) and proceeds to step (#2345). If not, it is determined in step (#2331) whether the speed is lower than the controllable minimum speed (Tvmin), and if it is low, (Tvmin) is set to the control shutter speed in step (#2333). (Tvc), and if the speed is not lower than (Tvmin), the calculated value (Tv) is set as the control shutter speed (Tvc) in step (#2335), and the process proceeds to step (#2345). In step (#2345), the set aperture value (Av) is made to become the control aperture value (Avc).

Next, the control in S mode is shown in FIG. 26 and explained. First, in step (#24QO), the exposure value (Ev
) is calculated from the average photometric value, etc., and it is determined in step (#2405) whether or not an electronic flash device is installed. If it is installed, in step (#2415) it is determined whether the shutter speed (Tv) is 7 or less. If it is 7 or less, the set shutter speed (Tv) is set as the control shutter speed (Tvc) (#2420), and if it exceeds 7, the synchronized speed 7 is set as the control shutter speed (Tvc). Proceed to step (#2430).

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

In step (#2405), if it is not attached, the set shutter speed (Tv) is set as the control shutter speed (Tvc).
430) and executes the subsequent flow.

Next, when in M mode (see Figure 27), step (
In the next step (#2520), the aperture value (Av) set in advance is changed to the control aperture value (Avc), and in the next step (#2520), the shutter speed (Tv) is changed to the control shutter speed (Tvc).
) is returned.

Returning to Figure 6, after completing the exposure calculation (#460), the camera's microcomputer (μC) determines whether there is a signal requesting an extension of the time required for communication (IV) from the card (#461). , if there is, wait for 10m5ec (#46
3), if there is no required signal, do nothing, and each I
Perform the fourth data communication with the C card (CD) (#4
65).

This request signal is sent because the calculation time is long in the case of a defocusing card.

FIG. 5(d) shows a flowchart of this control. First, it is determined whether communication (IV) is necessary or not.
Make a decision based on the signal obtained in step I), and return if it is not necessary. If necessary, set the terminal (C3CD) to “H”
level (#387), performs serial communication with the IC card (CD) (#375), and notifies the IC card that the IC card is on the output side. Now, wait for some time #377), use the camera as the input side to perform serial communication, and input data from the IC card (CD) #382)
, When this data communication is finished, the terminal (C3CD) is connected to r L
Return to J level.

The data input subroutine in step (#382) is shown in FIG. Set the address of the register for data input in step IV) to the address input from the card #382-11), perform serial communication the number of times input from the card (#382-12), and return.

When specifying a group, each communication number (Go
, Gl, G2). Set the address of the input register in the camera and perform serial communication a predetermined number of times. The contents of the data are as follows for the addressing type: (i) for a custom card, for the card;

(ii) Bracket card, H/S card ΔAv...
... Aperture shift amount ΔTv ... An explanation will be given when specifying a group for shutter speed shift and setting fire.

Go...Display data being set...9 serial communications G2...ΔLp...lens drive pulse...1 serial communication 6th Returning to the figure, after completing the data communication (mV) with the card, the microcomputer (μC) outputs the data to the electronic flash device (ST) (#467). To explain this as shown in FIG. 11(b), the microcomputer (μC) first determines whether the card function is ON based on the data input from the card #487
-1), if not ON, proceed to step (#467-10). When it is ON, step (#467-2) for forced ON, forced OFF, and GN restriction release 9 flash based on the control signal of the electronic flash device input from the card.
#467-4) (#467-6) (#467-8)
Judgment is made with G
When N restriction is released or non-emission is indicated, step them (#467-3), (#467-5).

(#487-7), (#478-9), and if the above four are not shown, ($1467-3)
°), (#467-5'), (#467-7°)
At step (#467-9'), each signal is reset and the process proceeds to step (#467-10). Step (#467-10
), the terminal (C3FL) is set to the "H" level for a certain period of time (T2) to indicate that the camera is in data output mode to the electronic flash device. The camera has an input/output switching circuit (Il)
oCG) is set to the output side (rHJ), waits for predetermined processing within the electronic flash device, and then performs serial communication once (#467-11 to #467-13).

When data communication with this electronic flash device is completed in Figure 6,
The microcomputer (μC) executes the card control flow of step (#470). This flow describes how to determine whether or not to control the camera using an IC card (in this case, a program card) based on input data, and how the camera operates when this is done. To explain it as shown in Figure 28, a microcomputer (μC) is first an IC.
Based on the data input from the card, it is determined in step (#2610) whether or not the camera is controlled by the card, and if the camera is not controlled by the card (CDFNF=O)
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) and shutter speed (Tv), and (Ay)
(Tv) data, control aperture value (Avc)
r control shutter speed (Tvc), film sensitivity (Sv
) are determined based on the data input from the IC card (#2615 to #263).

If the above data is not (Av) or (Tv) data,
It is determined whether the data is (ΔAv) and (ΔTv) (#2635). If the data is not (ΔAv) or (ΔTv), the process returns. (ΔAv), (ΔT
v) data, the control aperture value (Avc) is set to (ΔA
v) and (Δ
Tv) is added, (ΔSv) is added to the film sensitivity (Sv), and the process returns (#2840 to #2850).

In FIG. 6, after completing the routine for determining and controlling the camera using the IC card (#470), the process moves to display control (#471).

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

The shutter speed or card name data is stored in memory using 1 byte.

Aperture value・・・・・・・・・Aperture value or numerical value (
Setting data when using a card) data is stored in memory, and BO flashes that data.

AE mode... bo, b+ is one of the currently set P, A, S, M modes, b4 to b6 are the 8 modes set by the IC card. Each type of data is entered. bs, bz
controls blinking, lighting, and extinguishing of data b4 to b8.

Number of films...The number of films or numerical value (setting data at the time of card) is stored in memory, and 1bo is control data for turning on and off this data.

Button/Head day display...This is data for displaying the Button mark and Vero mark, and BO is control data indicating whether to turn on or off.

Card display: b+, bs (address D
P6H) is the data for turning on and off the display of exposure compensation +/-, and bs, be (address DP6H) is
Single shooting/continuous shooting selection and display off control, bo, b+(
Address DP7H) is the control data for flashing, lighting, and turning off the card display, b4, bs (Address DP7) 1)
1 and 2 respectively show multi-point AF/spot AF switching display and light-off control.

Data change display: Indicates location i indicating data change and lighting/extinguishing control.

Control data: Data indicating the camera sequence, bo: All lights off (main switch OFF) b+...
・Standby (main switch ON, S+O
FF) bs...Card display bs...Initial load b4...S+ ON bs...LED during rewinding Infinder display...bo...Focus display presence/absence bl...Focus Presence/absence of undetectable bs...presence/absence of tracking mode bs...presence/absence of multi-point AF b4...AF/M are shown, respectively.

A flowchart of the display microcomputer that controls this display is shown in FIG. 29(b) and will be described. Display control circuit (DI
SPC) to the camera microcontroller (μC) terminal (CSDI
When a signal from SP) that changes from "L" to rHJ is input, the interrupt shown in Figure 29(b) is executed, and 11 bytes of display data from the camera (see Table 5) are serially communicated. (#D-5). Determine whether the mode is all-off mode from the input control data #D-1
0), if the mode is all off mode (DPQH, bo; 1
), all lights are turned off without displaying anything (#D-15). If it is not in all-lights-off mode (DPQH. bo = O), it is determined whether it is in standby mode or not (IID-20), and if it is in standby mode (DPsH, b+ = 1)
, the currently set AE mode is displayed based on bo, b+ of DP3)1 (#D-25). DPa
ll, DP7) Display the card based on the information in 1,D
Cursor (Δ
) position is displayed, and the other lights are turned off. An example thereof is shown in FIG. 29(c). FIG. 29(c) shows the display of P mode, card function enabled, △ mark (cursor) at the exposure compensation position, exposure compensation not available, single shooting mode, and multi-point AF.

If it is not the standby mode in the step (#D-20), it is determined whether or not it is the initial load (#D
-45). When it is initial load (DP9) 1,
bs=1), film number display (DP6H), and Button/Pero display only, and the others are off (#
D-50~#D-60). FIG. 29(d) shows that the film is loaded and is in the initial load state. During rewinding (DPon, bs=1), the "-" symbol in FIG. 29(d) indicates the number of films being rewinded at that time.

When not rewinding, determine whether a card is displayed (#
D-70). When displaying a card (DPen, ba=1
), DPlH data is decoded to display the card name, numerical value is displayed based on the DP214 data, DPlH
Using b2 to b6 of , it displays what is selected (selected) by the IC card, and then displays a numerical value based on the DPan data, and then DP? Control the card display based on bo and b+ of H (#D-75 to #D-95)
. The display of this card will be explained in detail later. If it is not the card display mode as determined in step (#D-70),
Proceeding to step (#D-105), it is determined whether the switch (Sl) is turned on or not, and if it is turned on, the in-finder display is performed based on the in-finder information (#D-11, When it is not ON, the display in the finder is not performed and each step (#D
-115).

After that, the shutter speed (88) is displayed based on the DPIH information, and the aperture value and D are displayed based on the DP2H information.
AH mode display based on P2H bo, b+, D
Display of the number of films based on PlH, display of Patokan based on DP4H, display of card-related information based on the information of DPlH,ts, display of data change (Δ) based on the information of DPlH DPsH be, by, DP+oH b
AF mode and self display based on o (#D
-115 to #0-155). The second example is the flowchart for camera-side display control (display data creation).
9 (a) and will be explained. First, step (#270
In step 0), it is determined whether or not card display control is being performed, based on the data obtained in communication with the card (II), and if card display control is being performed, the mode is set to output the information input from the card as is, Perform serial communication 12 times (#27
05-2730). On the other hand, when not controlling the card display,
As a mode for outputting data created by the camera (shutter speed, aperture value, number of films, etc. - see Figure 29 (e)), serial communication is performed 12 times ($1271).
#2720). Next, in step (#2735), it is determined whether the card side has the authority to control the buzzer based on the data input from the card, and if the card side has the control authority, the camera shake warning signal is sent from the card. If it is a camera shake warning, a buzzer warning is issued (#2745) regardless of whether or not there is a buzzer warning by the custom card, and step ($1274) is executed.
Proceed to 5). If it is not a camera shake warning, the process proceeds to step (12785) without issuing a buzzer warning. If the card does not have buzzer control rights, the shutter speed determined by the camera is 6
If it is not less than 6, proceed to step (#2765). If it is less than 6, check whether the card function is turned on based on the data input in communication (I[). If it is determined and is not turned on,
Determine whether there is a buzzer warning based on the data in the E2FROM in the camera (#2754), and if there is a buzzer warning, a buzzer warning is issued, if there is no buzzer warning, the buzzer warning is not issued, and step (#2754) is performed.
2765).

If the card function is ON, determine whether it is a custom card (#2758) L. If it is not a custom card, proceed to camera control and perform the above-mentioned control. If it is a custom card, determine whether or not there is a buzzer based on the communication (TV) data input from the card #2760), and if so, issue a buzzer warning #27
56), proceed to step (#2765), and if there is no buzzer warning, proceed to step (#2785). In step (#2765), E2F from the custom card
Determine whether there is a write control signal to the ROM,
Write data from custom card in communication (IV) when it is ($12770), step (#27
Proceed to 75). When there is no write control signal, step (#2770) is skipped and step (#2775)
).

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

Here, the subroutine for the above mode setting is shown in Figure 29 (f
), here, it is determined whether the currently set mode of the camera is in the newly set mode or not, and if it is not, it is moved to another set mode. There is. For example, if A mode is currently selected for exposure, but if A mode is removed from the exposure mode selection by an IC card, the A mode remains as before.
It would be strange to display and control the mode, so this is prevented.

Now, in the flow of Fig. 29(f), the microcomputer (μC
), first check E2 to see if the settable exposure mode has been changed.
Compare the FROM data and the data input from the IC card (CD) to make a judgment #3203), and if they are different (that is, there has been a change), force the exposure mode to P mode. Set the data (Fbo, Fb+) to CO, O>#3205) and return.

When the display control (#471) described above in FIG. 1) Determine whether 10 seconds have passed (#
474). If the time has elapsed, the process advances to step (#490) to perform exposure control. If 10 seconds have not elapsed, return to step (#180). When self-timekeeping is not in progress (SLP=O), proceed to step (#473) and determine whether or not the release switch (S2) is turned on. If it is not turned on (step P7="H") Then, the process advances to step (#520), allows all interrupts, and returns.

When it is turned on (IP7'' L J),
It is determined whether or not the release prohibition data obtained in communication (II) is set (#475), and if it is set, the process proceeds to step (#520). On the other hand, if it is not set, it is determined whether the self mode is selected (#476), and if it is not selected (SE
LFF=0), proceed to step (#481).

When selected (SKLFF = 1), set the flag (SLP) indicating self-timekeeping (#477), and reset and start the timer (separate from power hold) (
1478). Then, in order to maintain the power supply, a flag (OF
F) should be set #479), AE flock flag (AI
CLF) (#480), fix the measured value, and proceed to step (#180).

Step (#481) to proceed to (IP+2=“HJ”) when not in self mode in step (#475) of FIG.
), manual focus mode (MFF=1
(Focus lock or manual focus adjustment using only focus detection)], and if it is the manual focus mode, the process proceeds to step (#490). When not in manual focus mode, step (#485)
Proceed to. In step (#485), a flag indicating focus (
AFEF) is set, and if it is not set, the process returns through step (#520). When it is set, the process proceeds to step (#490) to prohibit all interrupts in the same way as when the AF mode is not set, and then, in step (#492), communication (V) with the card is performed. This is shown and explained in FIG. 5 (θ).

First, the microcomputer (μC) determines the presence/absence of communication (V), and if there is no communication, returns, and if there is, the terminal (C3C
Set D) to r) (J level (set the data indicating communication (V) in #391), set the camera side as an output (#392), and perform serial communication once (#391). 393), then set the data, use the camera side as output, and perform serial exchange once. Waiting for some time #394
), input the camera side (#385), perform serial exchange eight times (#396), set the terminal (C8CD) to "L" level (#397), and return. This data is data for the memory card memory.

Here, the data contents are shown and explained in the CA4-) CD table: (i) Number of films (ii) Open FNO (fii) Control F value (iv) Control shutter speed (v) Exposure compensation value (vi) Exposure mode (vii) ) Exposure mode (vi ii ) Film speed. After completing the communication (V), the microcomputer (μC) advances to step (#495) and performs exposure control (described later), and then winds the film one frame in step (#500) (this is also (described later), release switch (S
2) is ON or not in step (#505),
If it is ON (IPy"r LJ), it is determined whether or not a forced continuous copying signal from the card is being input.

If it has been entered, proceed to step (#515),
If it is not input, it is determined in step (#510) whether or not the continuous shooting mode is set, and if the continuous shooting mode is set (F
bs=1), enable all interrupts in step (#515) (proceed to SOI routine. When not in continuous shooting mode (
Fba=O) returns to step (#505), waits for the release switch (s2) to be turned off, and turns it off.
If so, all interrupts are enabled in step (#520) and the process returns.

Next, the exposure control subroutine of step (#495) is shown in FIG. 30(a) and will be described. First step ($
2805), the terminal (C8ST) is set to the "H" level between (ta) and indicates to the electronic flash device (ST) that it is in the exposure mode.

Then, the film sensitivity (Sv) is output after D/A conversion as analog data to the light control circuit (STC) (#
2810).

In the next step (#2815), the control aperture value (Avc
) to perform aperture control and start mirror up. Next, the lens is driven during release. This is the 30th
As shown in Figure (b), first, it is determined whether the card function is ON or not (12822-0), and if it is ON, it is determined whether there is a snap drive bit signal input from the IC card indicating lens drive during release. Step (#2822-
If it is determined in step 1) that there is no signal indicating the card function OFF or snap drive, proceed to step (#2822-4) and wait for the mirror up to be completed, and when the mirror up is completed (IP20'' L J ) Return. If there is the above signal, drive the lens by the amount of lens drive (Δn) input from the card (#2822-3), stop the lens (#2822-4), and wait for the mirror up to be completed ( #2822-5). Returns when mirror up is completed (IP20: r L J).

Next, returning to FIG. 30(a), the shutter speed is controlled (#2825), and [lens drive RgL]
n control] (#2830) and return. To explain this as shown in FIG. 30(C), first it is determined whether the card function is ON or not (#2830-0), and if it is OFF, the process returns.

If it is ON, determine whether there is a snap drive bit signal or not (#2830-1), and if there is, the reverse signal (-
Δn) (#2830-2), stop the lens (#2822-4), and return. When there is no signal of the above bit, it is determined whether a defocusing card is inserted (#2830-5). Returns if it is not a defocusing card. If it is a defocusing card, the number of count pulses (CWT) at the current position of the driven lens is set as CT'” #2830-
6), the difference between the lens position (CT') before driving (
Δn) (#2830-7) Step (#28
The process proceeds to step 30-2), performs the same control as described above, and returns.

The Tv control routine in step (#2825) of FIG. 30(a) is shown in FIG. 30(d) and will be explained. First, the microcomputer (μC) changes Tv to exposure time (T) (#2835), The timer for measuring exposure time is reset and started (82836), and the first act (not shown) is started (#2837). And the card function is O
It is determined whether it is N or not (#2838), and if it is OFF, the flow moves to wait for the exposure time (T) to elapse (12846).

On the other hand, if it is ON, it is determined whether or not it is a default single card (#2839). If it is a defo-force single card, the pulse current at the current position of the lens is set as CT' in memory L (#2840), and the exposure time (T) is T/4.
(#2841). When T/4 is reached, the driving direction should be detected from the (ΔLp) information input from the card to the far side or the near side (#2842), the direction should be set accordingly, and the lens should be driven at the highest speed (#2845). ),
At this time, the counter that monitors the lens extension position is still operating. At this time, or when the card is not a deformation force card, the exposure time (T) is reached (#2846), and when it reaches T, the second act (not shown) is started (#2847) and the run is completed. Wait for a certain amount of time (#2848), stop the lens drive motor (#2849), and return.

FIGS. 31(a) and (b) show the steps (#) in FIG.
500) is a flowchart of the control for winding one frame of the film shown in FIG. To explain this, in Fig. 31(a), the microcomputer (μC) outputs a motor hoisting signal to the motor control circuit (MD), and the timer (Ts
) (#2850. #285
5).

This timer winds the film to the last frame,
This is a timer to detect when the film is stretched. The microcomputer (μC) determines whether the switch (hD) indicating that one frame has been wound is OWL in step (#2860), and if it is not ONI, it determines whether 2 seconds have passed in this state or not in step (#2860). #2865), and if 2 seconds have elapsed, the motor is stopped (#287, the film is assumed to be taut, this film taut control is performed (#2875), and then continuous shooting is performed. The cancel signal for canceling the bracket or auto shift is set to 1 (#2876), data communication is performed (#2877), and the process returns. The above-mentioned subroutine is shown in FIG. 31(b) and will be explained. A signal is output to reverse the motor (#2930).
), the film detection switch (SFLn) is turned off.
(#2935), and then turn the switch OFF.
When this happens, the motor is stopped (#2955) in order to wind the film into the cartridge chamber, and then the process returns.

Returning to FIG. 31(a), when the one-frame winding completion switch (SwoON) is turned on in step (#2880), the motor is stopped in step (#2880), and then the motor is stopped in step (#2890). ), the count number (Nl) of the counter indicating the number of film shots is incremented by 1, and the process proceeds to step (#2900). In step (#2900), this number of films (Nl)
Write this in the E2PRO old file.

Next, when the back cover close detection switch (SRe) or the rewind switch (SRII) is operated, the terminal (INT
A pulse signal is input to 2), and the microcomputer (μC)
Execute the interrupt (INT2) shown in the figure. In the flow shown in the same figure, the microcomputer (μC) first prohibits interrupts to this flow in step #300, and then in step #3
005), it is detected whether the rewind switch (hw) is turned on. If it is ON, execute the [Rewind] routine shown in FIG. 31(b) to perform the rewind operation, permit interrupts, and return (#301).
0). When the rewind switch (S++w) is not turned on, it is assumed that the camera back closing switch (SRD) is turned on, and the cancel signal (data is used in communication) is set to O to restore the bracket function or auto shift function. (#3012) The process proceeds to step (#3015) to determine whether or not a film exists. If there is no film.

Therefore, the film detection switch (SFLII) is OFF.
In case of F, step (#
3100). On the other hand, if the film is present (i.e., SFLM is 0N (7)), the terminal (C8
DX) to rHJ L/bevel, perform serial communication with the film sensitivity reading circuit (DX), input the film sensitivity data (Sv) and the number of film exposures (N), and when the communication is finished, connect the terminal (C8DX) to rLJ. L/Berni (#3020-#3030). Then, the number (N1) is −
2 (#3035), then the terminal (C3DIS
P) is set to rHJ level, performs serial communication with the display control circuit (#3045), outputs a signal indicating initial load (DP9Hb3 = 1) and data on the number of films, and thereby determines the number of films (Nl). Do not display any data other than what is indicated. When serial communication is completed, the terminal (C8DISP) is set to "L" level (#3
050), this numerical value of the number of films (N1) is displayed using two 7 segments. Next, the microcomputer (μC) outputs a signal indicating motor winding to the winding control circuit (#3055), waits for one frame to be hoisted (#3060), and switches the one frame winding switch (Sun
) is ON, add 1 to the number of films (N1),
It is determined whether or not it has become 1. If it has not become 1, the process returns to step (#3040). If it is 1, proceed to step (#3075), stop the motor, and proceed to step (#3095). Then step (#30
In step 95), the number of films (N1) and the film sensitivity are written to a predetermined address of the E2PROM, and after the writing is completed, all interrupts are enabled (#3100) and the process returns.

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

The above ('), the microcomputer on the camera side of this example (μC
), various flowcharts were explained, focusing on the operation of
Next, the control operation on the IC card side attached to this camera will also be explained using a flowchart. In addition, each type of card will be explained. IC card (CD)
A microcontroller (μC2) with a built-in E2FROM is built into the .

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

An auto-depth card is a card that allows you to focus on both the main subject and the background.The main subject is placed in front of the depth of field, and the background is brought into focus as much as possible.

Auto depth card> When the auto depth card is attached to the camera, it executes the reset routine shown in Figure 33 and sets the flag.

Reset all registers (RAM) (0-5) and sleeve.

Next, connect the camera to the auto depth card terminal (C5CD)
When a signal that changes from "L" to r) (J is sent,
The autodepth card executes the interrupt shown in FIG. Here, the auto depth card performs one serial communication (0-15) in synchronization with the clock sent from the camera to input data indicating the type of communication (0-15). From the data from this communication, the type is determined. Judgmentally 0-20),
If it is communication (I), set the card as the data input side and set it to 0.
-25), performs serial communication (0-30) and receives data (see CA-CD table) from the camera. Based on this data, execute the data setting subroutine.
35) Sleeve.

Here, before explaining the above subroutine, what kind of data is output from the card in response to communication will be explained using an auto-depth card table.

In communication (If): ・FL forced ON CS ll-1-
bl/GN restriction release (・1) C3n-1
-bi・Whether the card performs display control CS ll-1
-b4・Card function 0N10FF CS
ll-1-bs・Snap drive bit CS
ll-1-bi・With/without camera shake buzzer CS
ll-1-bt/P shift prohibited (・1)
C5I[-2-b.

・Forced P mode (=l) CS n-2-
b.

・No. ■ No communication (・O) C3ll-2-
bZ・AF Rawanhot (=1) C3ll-
2-b6・Forced AF (=1) CS
n-3-bl'TV' AV/display data
C3ll-3-b.

・Communication (mV) Yes (・1) C3ll-3
-b.

・Communication (I [[) Yes (・1) CS If
-3-bs・Group specification (=O) cs
n-3-bi/photometry loop manipulation C5I
[-3-by・Camera shake buzzer control (・l) C
5ll-4-bo Note that the AF raw shot here refers to prohibiting the tracking mode after focusing on the camera side, and the camera side prohibits the tracking mode by inputting this signal. (On the camera side, this is called a forced one-shot).

All signals other than those above are set to "0", and those marked with * in the table are set to "1" or "0" depending on the situation. When "1", the control is turned on, and the control is turned on.

For those that are fixed, rQJ and rlJ are determined.In communication (If), in order to specify the groups Go and G+ of communication (I[[) in group communication of communication (rV), CSI [ -9-(bo, bl)・1,1. Communication (IV) is display control data and lens drive data.
Because it is C3lI-10-bl, bz, bi・1.1
,1. Otherwise, let it be r□.

Any data can be stored in the blank areas.

At the intersection (t (Vl)), a sleeve enable signal is sent.

The data setting subroutine is shown in FIG. 35(a) and will be explained. First, in step (0-150), display control data is initialized to "0", and in the next step (0-160), communication (I) is set. It is determined whether the obtained DISREQ (card name display request) signal is "1" or not, and if it is "1", the display control data is set to "1" and the card display function 0N10FF is set to 0N (1). ), to (0-170.0-
175) 0 Then, in step (0-200) flag (
SIF) is set, and if it is not set, this flag (SIF) is set (0-205) to go through this flow for the first time, and the timer is reset and started (0-210). ) step (
If the flag (SIF) is set, the process also proceeds to step (0-215). In step (0-215), it is determined whether the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, set the photometry loop control signal to "1", the card display name, and the data that only displays the card (0-222).
Return. This display is shown in FIG. On the other hand, 10
If seconds have elapsed, set the photometry loop feedback signal to "0" and reset the flag (S I F) (0-226).
, sets the display control data to "0" (0-227), and returns. DISRE port = at step (0-160)
0, ■p, , rL, J (i.e., switch Sr
s + Sra, 4 + 5 ((1 + 5cos +
To judge whether any of S+ is ON) 0-1
0-163),'
If it is not LJ, do nothing and proceed to steps (0-165) and reset the flag (SIF). Thereafter, the process proceeds to step (0-260) in FIG. 35(b), and it is determined whether the self signal obtained in communication (n) is "1" or not.

When “1”, camera switch operation (card related)
Returns to prohibit control by.

When the self signal is not "1", the process proceeds to step (0-430) in FIG. 35(C) and the card switch (SCE
I) is ON or not, and when the card switch (SCD) is OFF, this flag (ScllF)
0-460), then determine whether the display flag (display F) is set or not.
), returns when not set. When it is set, the process advances to step (0-170) and the display of the card name is controlled.

At step (0-430), the card switch (So) is set to O.
When N, a flag (ScIIF
) is set or not (0-435)
If it is determined that the switch is set, it is assumed that the switch continues to be operated and the process proceeds to step (0-465). Please reset this when it is not sent (0-440)
, it is determined in the next step (0-445) whether the card function is currently turned on, and if it is turned on,
OFF (communication (n) data) (0-450)
Return. If it is OFF, it is turned ON (communication (II) data) and the process proceeds to step (0470) to control the display of the card name.

Returning to Fig. 34, when it is not communication (1), it is determined whether it is communication (n) or not (0-40), and when it is communication (II), the card is inserted to output the data set above to the camera. As output side, perform serial communication 10 times (0-5
0), sleeve.

If it is not communication (n), determine whether it is communication (III) (0-51), and if communication (I [)), use the card side as input (0-52) and perform serial communication 18 times. (0-53), input the camera data, and in the next step (0-54) calculate the data for controlling the camera (
(including exposure calculation) and sleeve. This calculation will be described later.

If it is not communication (I[[), it is determined whether it is communication (IV) or not. 0-55). If it is communication (TV), it is determined that the card is on the output side. 0-60), and whether it is display control or not. (0-65) and display control, outputs display data (0-70), sets address, performs serial communication 9 times (0-75), and sleeves.

When not display control (TV, AV day), TV, Av
Specify the address of the data, perform serial communication five times (0-85), and sleeve. When the communication is not (■), it is assumed that the communication is (VI), and first, serial communication is performed (0-125) with the data card as the output side in accordance with the clock from the camera, and then sleeved.

Next, FIGS. 36(a) and 36(b) show flowcharts for performing AE (exposure) calculations for the auto-depth card, and will be briefly described.

First, the FLG inputs whether it is in focus or not through communication (II).
It is determined whether the bit (bo) of O is "1" or not. If not in focus (bl-'0), depth aperture (AV[1EP)
Proceed to O as the shallowest open F value (AvO).

This is because this card focuses on both the subject position and the background, so this information cannot be obtained unless the subject position is in focus. For this reason, if you consider the maximum aperture value that indicates the shallowest depth, and place the subject in front of this depth (on the camera side), the subject will be in focus no matter what aperture value you use. When in focus, (bO""1), (α
・δ is a constant related to depth). This F value is an aperture value for covering the depth from the ω position at a position that is half of the current feed-out amount (Lp) from the ■ position.

Set this to the apex value AVDEP (■).

In step 2, the aperture value that satisfies the depth from the current lens position to position ■ is calculated.

Based on this value, the lens shift value is calculated.

t and p are O at infinity, and the values become thicker as the distance gets closer.At infinity, there is a considerable depth of field, so there is no need to shift the lens, so set F=O.When the subject is close As the background increases, the lens must be moved a lot to capture the background, so the F value increases.Determined AVDII
! When P is less than the open aperture value (AVO) of the lens and more than the maximum aperture value (AV, X), the limit value is set to Avo or AII+smX.

In step O, a reference value (Tvf) of shutter speed is calculated in order to sound a buzzer to warn of camera shake. Lenses with long focal lengths tend to cause camera shake, so ('r
wt ) becomes faster (see Figure 38).

zFz=16X logzf150+56 (f: lens focal length (+nm)) When the shutter speed becomes faster than a certain point (TVF>8
) TVF・8 to prevent camera shake from sounding the buzzer.
shall be.

When the flash switch is ONL, when the spot key is ON (AEL = 1), the exposure value E□ is calculated from the spot brightness (BVc) (BVi brightness), and when the spot key is OFF. (A.E.
L=O), and the exposure value Evs is calculated from the brightness (Bvs) - main subject brightness -.

Then, the Evs obtained above is the control limit (AVsaw + Exceeding TVIIIIX or AV
o+TV+si+s), set the above limit value and proceed to camera shake detection; when within the above limit range, AV
- Camera shake occurs when the shutter speed is set to Avo (TVF
), then TV = Evs −Avo, T
Vc! Set TV, AVc - AVo, and proceed to camera shake detection. However, when TV exceeds camera shake (TVF), at 0, when Evs > Avoz + Tvt, priority is given to no camera shake, and the aperture is set to increase the depth of field. Squeeze the line (#0). EDS≦AVDE
When P+TVf, the controlled aperture value is set to AVC4-AV and the controlled shutter speed is set to TVC4-TV. Evs＞
When it became Avotp+ Tvt, this (AVDE
The effect is the same even if the aperture is narrowed down more than P), so AV, T
Create a diagram that increases V at the same rate (see Figure 39).

When the obtained AV exceeds the maximum aperture value (AVmax), control AVc is set to AVmax, control TVC = BVA -
Let it be AVmax.

When the calculated AV does not exceed the maximum aperture value (AVmax), this is set as the control 1lAVc, and the calculated TV = EVs −
AV"t? is determined, and it is determined whether or not this exceeds TVmax. If it exceeds, set the control TVc to TVmax and control J.
AVc is recalculated as 8Vc=EVs-TVmax. When the calculated TV does not exceed TVmax, the calculated TV is set as the control TVc.

When [F] (that is, the shutter speed TVc obtained is
).

), set the communication (■) signal (S ll-1-bt) to 1 to issue a camera shake warning, and when there is no camera shake, set this signal (SI[-1-bt) to 0. .

Then, the bit (bo) of the communication (IV) signal CTRLB
) is set to O to prohibit flash emission.

When the flash switch is turned on, the aperture value (AVD) at that time is determined by AVD = IV + SV - DV.

0-1-・AVn≧AVO2(open F(+!!AVoz
) or more.

0-2-・The brightness difference ΔBV with the background is BVA (BV4f
7) Calculate from (brightness) - BVS (main subject brightness).

0-3---Determine whether or not there is a previous calculated value (ΔBV).

0-4-・If not, then ΔB≧1/16 BVs
+0°25 is determined. This takes into account light from the background that wraps around the main subject by increasing the determination level as the main subject becomes brighter.

If ABV≧1/16 BVs + 0.25, proceed to flash control.

0-5 -- When there is a previous calculation value (ΔBV), it is determined whether or not it is the light emission mode (flash control) based on the previous calculation result.

0-6---When in light emission mode, ΔBV≧1/16
Determine BVs. It is made easier to emit light by making it smaller by 0.25 EV than 0-4. ΔBV
If ≧1/16 BVs, proceed to flash control.

0-7-・When not in previous flash mode, ΔBV≧l/1
Determine 6BVs + 0.5. From 0-4, 0.2
By increasing the voltage by 5 EV, it is possible to emit light.

When 0-8-AVD≦AVoz (when AVD is below the open F value), 0-12 0-4 TeΔBV < f/16BVs +
0.25 (7) When 0-6, ΔBV < 1/16
BVs(7) when 0-7te ΔBV < 1/16 BVs
It comes when +0.5.

Below this, the main subject (EVs) is at a low brightness judgment level) L
It is determined whether it is less than t (TVF44Voz+ΔEV), and if it is less than that, flash control is performed. ΔE
V is ΔEV·−0, 25 when there is no previous calculated value, and it is brighter when the previous light is emitted. If the previous non-emission time was low light and the condition is non-emission, the process advances to 0-13 to control flash non-emission.

Next, flash control will be explained.

・When the spot key is turned on (AFL・1),
It is determined whether or not the previous spot key ON calculation was performed, and if the previous spot key calculation was performed, the flash adjustment is performed using the previous control aperture value (AVc) and the control shutter speed (TVc). Proceed to optical calculation (F.

~F,). When the spot key is not ON, or when the previous spot key ON calculation has not been performed, calculate the exposure value (EVA) from the background brightness (BVA) (F-4)
.

This exposure value (EVA) is less than or equal to the value of the synchronization speed (TVX) and the aperture value (AVoz) + 1.5, and the main subject exposure value (E
When Vs) is less than the tuning speed and open F value - 1,0,
Both the background and the main subject are dark. Then, it is determined whether the spot key is turned on or not, and if it is not turned on, the control aperture value (AVc) is set to AVD, the main subject is controlled to have proper exposure with flash light, and the depth of field is increased as much as possible. I'm here. Then, the control shutter speed (TVc) is set as the tuning speed and the process proceeds to dimming calculation.

Background exposure value (EVA) is BVA > TVx + A
Voz + 1°5 or main subject exposure value (EVS)
When EVS > TVx +AVoz-1 or the spot key is ON, ΔBV (BVa - BVs) is 2.
If it is 5 or more, it is determined that it is 2.5 or more, and the exposure control value is set to EVA-1.5 as a backlight condition, the background is overshot to make it look like it is backlit, and the main subject is properly exposed with flash light. When the value is less than 2.5, it is assumed that there is no backlight condition, and the background is under-exposed by one step to properly expose the background and main subject using natural light and background light. (F-9) Open F
Value (AV.

Determine whether the shutter speed in case 2) is equal to or higher than the synchronized speed, and when it is equal to or higher than the synchronized speed, set the control shutter speed (TVc) to the synchronized speed (TVx), and set the aperture value (AV).
is calculated from 1EVc - AVx, determines whether the aperture value (AV) is greater than or equal to AVD, and when it is greater than or equal to AVD, the control aperture value (AVc) is set to AVD, thereby preventing the main subject from being underexposed. There is.

When AV<AVD, the control aperture value (AVc) is set to AV.

Then, each flash dimming level is calculated.

When TV<TVx at F-12, control aperture value (AVc)
is the aperture F value (AVoz), determine whether the TV is equal to or higher than the minimum shutter speed (TVmin), if it is equal to or higher, set the control shutter speed (TVc) to TV, and if it is less than TVmin, set the control shutter speed (TVc) to TVmin. Proceed to calculate the flash dimming level.

To explain this dimming level calculation as shown in FIG. 36(C), the exposure value (EVc) is calculated from AVc + TVc, and E
It is determined whether Vc - EVs (exposure value of main subject)>O.

When EVc - EVs≦0, the correction amount is set to χ·1.5, the light emission amount (light control amount) is set to under, and the main subject is not overshot, and the camera proceeds to the door.

When EVc −EVs > O, EVc −EVs
> 3, and determine whether EVc - EVs >
3, the correction amount Z is set to 0 and the process proceeds to m-7. EVc
When −EVs≦3, Z= ′A(EVs −EVc
+ 3) and proceed to the door. Determine whether image magnification (β) can be used, and if it can be used, β≧1/7 → TTL
, χ 1/7〉 β → TTL 'l χ+0.51/10
>β1/40 → TTL-χ10.8751
/40> β → TTL = χ + 1.25, and as the subject occupies the screen becomes smaller (β is small), the amount of reflected light returned from the subject decreases, the light adjustment completion signal is delayed, and the amount of light emitted decreases. Because there are so many images, it becomes overexposed. In order to correct this, the amount of light emission is reduced as β becomes smaller.

When β cannot be used, assuming that there are many subjects with 1/10 > 1/40 above β, TTL x 10.875 is used. And the system? l01M light! (SVc) to film sensitivity Sv TTL
Add.

After completing the dimming level calculation, a flash light emission signal is set and camera shake Bz is turned off.

Then, it is determined whether the control aperture value (AVc) > AVDEP, and when AVc > AVDEP (7), the AVF
Let ^VDEP be the aperture value for determining the amount of focus shift. This brings the background (up to 00) and the main subject into focus.

When AVc≦AVDEP, AVF=AVc, the main subject is placed at the forefront of the depth of field (the one closest to the camera), and the background is brought into the depth of field as far as possible. Then, it is determined whether or not it is in focus, and if it is not in focus, the amount of focus shift (
ΔLP)・0. When in focus, convert AVF to F using a table, and convert the focus shift amount (ΔLP) to ΔLP gate F.
XKEL Calculate by Xα×δ.

This will be briefly explained in FIG. 40.

In FIG. 40, the X mark indicates the lens position (subject position). AVc is ^V for the depth of AVDliP
The depth when the depth is greater than or equal to DEP is narrower and closer to the depth of AVDEP. At this time, the lens drive is controlled so that the main subject is in front of the depth of field. Note that the dotted line indicates that the image is out of focus (≠AVDEP). Next, when AVc exceeds AVDliP, the depth becomes closer overall and the range widens. At this time, AVDEP
The lens is controlled to the position determined by .

In this case, the focus is up to the ω position.

An example of the RAM map in the camera is shown in Table 7. In the case of such a RAM (including E" FROM) map, group M of data (Go, G+, Gz) is
When P, , MP, , MP, , is required, if a group is specified, the above is done in advance.

The start address and number of M P Ia may be stored and read out in response to a signal. These are compatible with existing card systems because they only read fixed data. However, new cards with other functions have been created, such as the above-mentioned other data M.
If P and MP are required, no other data can be read.

To make this possible, it is necessary to directly specify the start address of the data and its number (direct addressing type). However, in that case, it is not possible to specify discrete data (for example, data of MP and only data of MP), and all data from M P z to MP is specified, and the data There is a waste (of memory and time) in transferring the data. In this embodiment, data is transferred efficiently by using these methods.

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

Table (Continued) Table Functional Data (Fbn) RAM Table 4 C11L@> Table 4 Routing (ji■) Table 7 Table 1 (Continued) Table Lens (I) Table (Continued) ) Table Lens (I [) m12m Auto depth card Table 11 Inside camera Lens information The control flow according to the gist of the present invention in the above-mentioned embodiment is shown in Fig. 6, Fig. 30 (a) (b) (C) and Figure 36(a) (
b) As shown in (C), etc., when it is determined that the switch (S,) is in the 019 position at step (It428) in FIG.
29) and the lens is brought to the focus position. Next, in step (#473), the release switch (S2) is turned to
When the determination is N (including the case where 10 seconds have passed in step #474), exposure control is performed in step (11495). In this control, step (
Lens drive control is performed in step #2822), but as shown in FIG. 30(b), step (#28
22-0), the card function is ON, and the step (+1
2822-1), in the case of snap drive (using an auto-depth card), the lens is driven by Δn in step (12822-2), and the lens is deviated from the focus position. After that, step (1128
Shutter speed control is performed in step 25), and exposure is substantially completed. After the exposure is completed, step (+1
2830-2), the lens is driven by -Δn. This means that it is driven by Δn in the opposite direction, so
This means returning to the original focus position. As can be seen from FIG. 36 and its explanation, the Δn is selected based on the aperture set on the auto-depth card (to provide a position corresponding to the depth).

According to the present invention, since the subject is in focus before the release switch is turned on, the image seen through the viewfinder is also in focus. Even if the camera is driven and the focal position shifts, it hardly gives the impression that a photograph was taken with a different focal position, and therefore does not make the photographer feel uneasy.

When the lens is returned to its original focusing position after exposure, the above-mentioned effect becomes greater.

Also, if the point at which the lens moves from the in-focus position (another position) is set to a predetermined aperture determined by the aperture determining means (a position corresponding to the depth of field), both the subject and the background are in focus. can be done.

If the control operation of the control means is based on the control function of an accessory that can be attached or detached from the camera body, and the aperture determining means is provided in the accessory, part of the function can be provided to the accessory. Accordingly, the burden on the camera body side is reduced. And this accessory
When used as a C card, the accessory is small and lightweight, making it convenient.

[Brief explanation of drawings]

The figures are all related to embodiments of the present invention, and Fig. 1 is a circuit block diagram of the entire camera, Fig. 2 is a diagram showing the display form on the display section, and Fig. 3 is a diagram showing the camera reset routine. FIG. Figure 4 (a
) is a circuit diagram of the lens circuit, and FIG. 4(b) is a side view of the lens. FIG. 5 is a flowchart regarding data communication between the camera and the card. FIG. 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., and FIG. 7 is a flowchart showing a routine for determining the AF mode and locking the focus. Figure 8(a) is a circuit diagram of an electronic flash device;
are explanatory diagrams regarding the display, Fig. 8(C) and Fig. 8(
6) is a flowchart showing an interrupt routine regarding the electronic flash device, and FIG. 9 is a diagram showing an interface circuit of the electronic flash device. FIG. 10 is a flowchart of lens data input. FIG. 11(a) is a flowchart of flash data input, and FIG. 11(b) is a flowchart of flash data output. FIG. 12(a) shows the AF flow chart, and FIG. 12(b) shows the AF flow chart. Figures 12(C), 12(d), 12(e), 12(f), and 12(b) are flowcharts related to this. FIG. 14 is a diagram showing an example of the display in the finder regarding this. FIG. 14 is a diagram showing the distance measurement range and photometry range in the shooting screen. FIG. 15 is a flowchart for data setting, and FIG. 16 is a diagram for changing exposure mode. Flowcharts Fig. 17 is a flowchart for selecting the function mode, Fig. 18 is a flowchart for exposure compensation, Fig. 19 is a flowchart for self-setting, Fig. 20 is a flowchart for creating photometric data, and Fig. 21 is a flowchart for AE frock. FIG. 22(a), FIG. 22, etc.) are flowcharts for setting the aperture and shutter speed. Fig. 23 is a flowchart of exposure calculation, and Fig. 24(a), Fig. 24c)
, FIG. 24(C), FIG. 25, FIG. 26, and FIG. 27 are flowcharts of each mode therein. FIG. 28 is a flowchart of control by the IC card. FIG. 29(a) is a flow chart showing the display routine, FIG. 29 et al.) is a flow chart showing the interrupt routine, FIG. 29(C), FIG.
FIG. 9(e) is a diagram showing a display example, and FIG. 29(f) is a flowchart showing a mode setting routine. Figure 30 is a flowchart of exposure control, Figure 30(b)
30(C) is a flowchart of lens driving, and FIG. 30(d) is a flowchart of shutter speed control. FIGS. 31(a) and 31(a) are a flowchart relating to winding one frame of film, and FIG. 32 is a flowchart showing an interrupt routine relating to closing the back cover. 33, 34, 35, and 36 are diagrams showing the operation flow of the auto-depth card, and FIG. 37 is a diagram showing an example of its display, and FIGS. 38, 39, and 40 are diagrams showing the operation flow of the auto-depth card. is an explanatory diagram thereof.

Claims (4)

[Claims] (1) A focus detection means, a lens drive means for driving a photographic lens, a release button, a first switch that is turned on with the first stroke of the release button, and a second switch of the release button.
a second switch for release that turns on with the stroke of;
When the first switch is turned on, the lens driving means is driven to bring the photographing lens to a focus position according to the output of the focus detection means, and when the second switch is turned on, the lens driving means is driven to bring the photographing lens to a position different from the focus position. a control means for driving the driving means to bring the photographing lens to a position. (2) The camera system according to claim 1, wherein the control means controls the drive means to return the photographing lens to the in-focus position after exposure is completed. (3) The camera system according to claim 1, further comprising an aperture determining means, and the other position is a position corresponding to a depth based on a predetermined aperture determined by the aperture determining means. . (4) The control operation of the control means for moving the photographing lens from the focusing position to another position is based on the control function of an accessory that is detachable from the camera body, and the aperture determining means is provided on the accessory. The camera system according to claim 1, characterized in that: