JPH02118531A - Camera system - Google Patents

Abstract

PURPOSE:To prevent an image from blurring even when a moving subject is photographed large on a film surface by finding an exposure program diagram which determines an aperture value and a shutter speed for exposure control based on the photometric value of a photometry means according to photographic magnification. CONSTITUTION:This is a camera system which suits to the photography of the subject in motion and is equipped with a photographic magnification detecting means which detects the photographic magnification beta, a photomery means which measures the brightness of the subject, and an exposure program diagram determining means which determines the aperture value and shutter speed for exposure control according to the photometric value of the photometry means. The exposure program diagram has the bending point of the intersection of a part where the shutter speed varies as an exposed value varies while the aperture value is equal to an open aperture value and a part where the aperture value varies as the exposed value varies successively to said part. An exposure program diagram determining means sets this bending point to a point where the shutter speed is large when the photographic magnification is large, but sets the bending point to a point where the shutter speed is small when the magnification is small.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera system, and more particularly to a camera system suitable for photographing a moving subject.

Cameras generally have an exposure program diagram that determines the aperture value and shutter speed based on photometric values. Conventionally, there are devices that change the bending point of this exposure program diagram depending on the focal length. In other words, this kind of exposure program diagram has a straight line part where the aperture value is the same as the open aperture value and the shutter speed changes as the exposure value changes, and a straight line part where the shutter speed changes as the exposure value changes. Normally, there is a bending point where the straight line portion where the aperture value changes intersects, and this bending point was changed depending on the focal length.

Problem to be Solved by Akira When photographing a moving subject such as sports or car racing, image blur due to the movement of the subject changes depending on the size of the subject captured on the film surface. That is, when the object on the film plane is large, even a slight movement of the object will cause a large amount of image blur, and when the object is small, there will be little image blur even if there is a large movement.

The present invention has been made in view of these points, and provides a camera system that suppresses image blurring caused by the movement of the subject when photographing when the subject is thick on the film surface. The purpose is to

In order to achieve the above object, the camera system of the present invention has the following features:
a photographing magnification detection means for detecting the maximum shadow magnification β; a photometry means for measuring the subject brightness; and an aperture value Avc and a shutter speed Tvc for controlling exposure based on the photometry value of the photometry means.
and an exposure program diagram determining means for determining a shutter speed Tvc as the exposure value Evs changes while the aperture value ^VC remains equal to the open aperture value Avo. A bending point on the exposure program line, which is continuous with this part and intersects with a part where at least the aperture value Avc changes as the exposure value EvS changes, is determined according to the photographing magnification β.

With such a configuration, the exposure program diagram determining means, for example, sets the bending point of the exposure program diagram to a point with a large shutter speed, and vice versa. When the photographing magnification β is small, the bending point is set to the point where the shutter speed is small.

Example of SJL FIG. 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 CCD, 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).

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

(LM) is a photometry circuit that performs photometry for four areas (described later), converts the photometry values into A/D, and converts the photometry values into microcontroller (μ
C) as luminance information. (DISPC) is a display control circuit that inputs display data and display control signals from a microcomputer (μC) and causes the display unit on the top of the camera body (DISP) and the display unit in the viewfinder (DISPz) to display 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 control signals from a microcomputer (μC), and (MD) is a motor control circuit that controls film winding and rewinding based on control signals from a microcomputer (μC). It is. (BZ
) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is a battery that serves as a power source;
DC/DC is a DC/DC converter (DI
) to (D4) give a voltage lower than the voltage (VDD) to the microcontroller when the DC/DC converter is OFF,
This is a group of diodes to reduce power consumption.The hardware of the camera's microcontroller (μC) can operate at this low voltage, so an interrupt occurs, but the microcontroller (μC2) of the IC card (CD) cannot operate at this low voltage. Can not. (
RR) (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.When the battery is installed and the switch (SRE) is turned off, the microcomputer (μC) A signal changing from "L" level to rHJ level is applied to the terminal (RE), and the microcomputer (μ
C) will execute a reset routine to be described later. (Sεi) 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. (SFIIN)
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 operating the up switch (Sup) and down switch (Sdn). (Sco) 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). (Scns
) is the card data setting switch that is operated when transitioning to data settings when the card is installed.
SL) is a switch for performing preparatory operations necessary for photographing such as photometry and AF operation, and is turned on by the first stroke of a release button (not shown). The above switch (SEM), (
SFIJN), (Sen), (Seas), (S
+) is operated and turned ON, an interrupt (INT+), which will be described later, is executed. (mixed) is the main switch to enable camera operation.
By turning this switch ON or OFF, (I
NT2) interrupt.

(Snup) turns ON when the mirror is raised, the shutter mechanism is charged, and turns OFF when the mirror is lowered.
This is the switch.

(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. (Sl, ID) is a one-frame switch that is turned ON when one frame of film is wound. (SaEt) is a switch for performing AE lock (exposure lock), and is composed of a normally open bush switch. (SAp7n) is a focus adjustment mode switching state switch that switches between AF and manual focus adjustment.

(SSE) is a permanently open change data selection switch for selecting data to be changed. (SgcLF) 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 (Sou). is an aperture change switch that changes the aperture value by operating this switch and operating the up switch or down switch when the exposure mode is M mode (manual mode). In M mode, press the above switch (Sau
) is not operated, the shutter speed is changed by operating the up switch or down switch. (SF
LM) 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. (Sgc) is a back cover close detection switch that turns ON when the back cover is closed and turns OFF when it is opened.
executes the interrupt routine described below. (SRw) is a switch for starting film rewinding. When operated, ONL and an interrupt routine to be described later are executed, and when the back cover is opened, it is turned off. (SCR) is an IC card installation switch that turns OFF when an IC card (CD) is installed.
Reset the microcomputer (μC2) of the CD.

(x) is a 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, use the aperture change switch (SQU)
By turning on (Sup) and (Sdn), you can increase or decrease the aperture value, turn off the aperture change switch, and (Su
p) and (Sdn) function to increase and decrease the shutter speed, respectively. Up switch (Sup)
, the terminal (
It is detected when IP20) and (IP21) each become "L" level. In FIG. 1, a line (WI) common to each of the switches is connected to a ground potential point (GND).

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.

(D) 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 considered 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", and the blinking display "1"
” will be “1” to “3”, but this blinking display will be “1” to “3”.
"3" corresponds to the above-mentioned 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 gradually, and by pressing the up switch or down switch, the function (setting value) in that mode is selected. Modes (i) to (II[), 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 depending on the scene (details will be explained later).

(III) Function card; (3-1) H/S card ((highlight/shadow)
card) This card makes white objects whiter and black objects darker, and exceeds the exposure value obtained by the camera by a certain value (1
2,0) (highlight), under (-2,0) C shadow), and when this card is inserted (H/S
(one of the selections) 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.

(IV) 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 = r HJ), the built-in clock starts oscillating, and the IC card (CD
) is also sent a clock from the microcomputer (μC). still,
At the time 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
10).

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 E2 FROM (N+) and the film sensitivity (Sv
) is read and transferred to a predetermined RAM. After that,
It is determined whether the main switch (mixed) is in the ON state (#120). If the main switch is in the OFF state, (IPa = 'HJ), step (#125
) and set the power supply transistor (Tr+) to 0FF (P
W= r L J ), and data communication m) of serial data with the card is performed.

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, C5co-'
HJ), and then a serial clock for transfer (to SC) 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. This is 8
By repeating this process (8 bits), one data transfer is completed, and by repeating this process as many times as necessary, the necessary data can be obtained. Data communication with lens (LE) 1
The same applies to data communication with the display 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) and requests communication (#270).

Next, data indicating data communication (VI) is set, the camera is set on the output side, and data communication of data indicating communication (Vl) is performed (#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. #282). Perform data communication (#2
85) After inputting the data, set the terminal (C8CD) 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 okay to sleep (stop) or not.
The lock and voltage (Vn) required for the operation of the IC card are
.

), these clocks and voltages will not be sent during the operation of the IC card (because the clock will stop and the voltage will drop when the camera goes to sleep).
This is to prevent the microcomputer (μC2) of the IC card from being able to perform predetermined signal processing (writing control to the E2FROM).

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 sleep causes the clock to stop and the DC/DC converter to be turned off by hardware. If sleeve is not possible, step (#1
45) After waiting 30m5ec, return to step (#130) and repeat the same process.

Next, turn the main switches (S, l) ON or OFF.
The interrupt (INT2) will be explained.

First, it is determined in step (#147) whether or not the interrupt is due to the ON of the switch (sn), and if the interrupt is not due to the ON (IPe = "HJ"), the interrupt of (INTl) is prohibited (#240) and displayed. Set the data (display all lights off at this time #245), step (#25
At step 0), 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 microcontroller turns off all lights by inputting data for turning off all lights (second
(See figure (e)). Note that control of the display microcomputer will be described later.

On the other hand, in step (#14.7) the main switch (So
) is ONL, in step (#150)
Enable INTl 3 interrupt and proceed to the next step (#15
Display data is set (standby display) in step 5), and data communication is performed with the display microcomputer in step (#160). Through this data communication, the display microcomputer is
). In this FIG. 2(f), P mode is selected as the AE mode, no exposure compensation, and single shooting mode.

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 Spn+ 5puH, S
It is determined in step (#170) whether any one of co, 5cus, and S+ is ON, and if it is not at the "L" level, the process proceeds to step (#125), where 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 [5ION] subroutine described later (#190). Next, it is determined whether the terminal (IF5) is at the "L" level or not (#20. r
If the level is "L", the card request signal (DSPREQ) is set to O in step (#203), and then in step (#18).
0) and repeat steps (#180) and (#190). If the level is not "L" (that is, if none of the above five switches are operated), proceed to step (#205), and determine whether or not the power retention flag (OFF) is set; If it has been set, the power hold timer is reset and started in step (#215), and the flag (O
PF) and proceed to step (#235). Even when the power hold 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 5ION loop from the IC card (CD). , return to step (#190). This happens when the display by the display microcomputer is controlled based on data from the IC card, such as during data setting, even though the user also wants to see the display.
This is done to prevent the display from automatically changing to standby when the 5-second power hold on the camera side is cut off, which is 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 elapsed time has elapsed, the process advances to step (#150), from standby display to sleeve control, while if the elapsed time has not elapsed, the flow from step (#190) starting from [:5ION:l] is repeated.

When an IC card (CD) is installed in the camera, in step (#172) a display request signal (D
After setting SPREQ) 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, interrupts by [INTl] for this flow are prohibited (#400). This is because if the interrupt (INTl) shown in FIG. 3 occurs during the main control, the control operation will not proceed further. Next, (#405) microcontroller (μC
) terminal (PW) is set to “H” level, and the inverter (I
By applying a low level to the base of the PNP transistor (Trt) through the transistor (NI), the transistor (Trt) is turned ONL, the photometry circuit (LM), and the AF
Supplies power to circuits (AFCT), etc. Next, input information specific to the interchangeable lens from the lens circuit (LE) (#41
0). This is shown in Figure 10 and explained. First, the terminal (
C8LE) is set to "H" as a bell (#600), and serial communication is performed as many times as necessary to input information from the lens (#605). Figure 4(a) shows the circuit inside the lens.
2) to count and create 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. Then, predetermined data is output to the camera body.

The switch (SO) 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 (8) 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's open aperture value (Avo), the lens's maximum aperture value (Avmax), the amount of aperture from (1) to close, Focal length information, (lens drive amount/defocus amount) conversion coefficient, ON/OFF of the above lens side switch (SO),
Indicates whether or not to drive the lens (LOK)
), etc., and is input to the RAM at the address within 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 enough space in the ROM, add 2 bytes 06□ and 08H as shown in Table 10, and change the address to select Oh or 08H depending on whether the lens side switch (So) is OFF or ON. Just do it. However, if there is no such margin, as shown in Table 9, in this embodiment of the ROMC provided for multiple types, data other than data changed by turning on and off the switch (B)] is set to the same data. , switch OF
This can be done by selecting (A) or (B) depending on F and ON. However, in this case, the types of lenses that can be used with this ROM are reduced. For the lenses in Table 9, if the lens side switch (SO) is OFF, 06. or 078.088, or vice versa, 16N and 17H (bo=o, AF motor stopped) are sent and the signal is turned off. Note that (XXX) in the address indicates address data that changes depending on the amount of zoom or focusing lens extension, and the encoder (3
)(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), 08H (Table 9), AF when not in macro mode
Address 09H (Table 10), 07+4 for operation permission
(Table 9) data is sent.

Now, even when a lens that has the function of the above switch (SQ) 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, since the IC card is not an old camera, the latter two of the changes in function by the IC card - m - selection of focus lock, continuous, and spot AF - m - cannot be performed, and the focus 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 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, o7+, 08H, and switch (SO) are OF
When it is F, it is A in Table 9, and 06H and 07 in Table 10.
8. 09H may be changed from one to the other.

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 (C8
LE) to “L” level and return 6 (#610)
.

Returning to FIG. 6, the microcomputer (μC) continues to perform data communication (I) with the card in step (71413). In this data communication (I), the state of the camera switch.

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

This content is shown in the CAoCD table (see column I communication). Data communication CI) is shown in FIG. 5(a). The communication method is almost the same as the data communication (VI) in Figure 5(f) above, except that data indicating communication (I) is set and output, and the subsequent Data communication (SIO) 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 example will be explained.

FIG. 8(a) shows a circuit block diagram of the electronic flash device.

(D,) is a capacitor for preventing reverse charging, (C+)
is a large capacity backup capacitor (μC3
) 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 (μci). (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 (μC3). (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 the figure, it displays whether the power is ON (a state in which boosting the voltage and data communication with the camera can be performed by signals).
Nothing is displayed when . (Ilo CC) is an input/output switching circuit that switches input/output for communication with the camera.

(S, +) is a normally open bush 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 a normally open switch that changes the light emission amount between 174 and full light emission, and each time the switch is turned on, the switch changes from 1/4←to 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 (sn) is operated, the microcomputer (
A signal that changes from "H" (the terminal is pulled up internally) to 'LJ' is input to the microcontroller (μ(,
3) is interrupted, and the microcomputer (μC3) executes the flowchart shown in FIG. 8(C). In this flowchart, first a flag (O
NF) is set or not t 6 (#5
T10). When set (ONF=1), the pin (OF2) is reset to reset this flag and stop boosting.
Set it to "L" level, turn off the ON display, and press sleeve 6.
(#5T20 to #5T40). 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 (OF
2) Start boosting as H4 level (#5T
50. #5T60). Then, display ON (#5
T70). Next, reset the timer and start #5T
80), wait for 5 minutes to elapse (#5T90), wait for 5 minutes to elapse (#5T20), turn off the power, perform the same control, and go 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 (TI
) and outputs a signal that changes from "L" to "H" level to the microcontroller (μC terminal (INTI)) terminal.

The microcomputer (μCs) inputs this change signal and calculates (
(INTI) interrupt processing.

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

The microcomputer (μCs) first connects the terminal (OP+) to r)(
The timer is reset to J level, all outputs of the timer are set to ILJ level, and even if a signal is input to the timer, it is not responded to (#5T110). Then, it is determined in step (#8T120) whether or not the flag (ONF) indicating power ON is set, and if it is set, the data communication bit (ST8+) is set.
Set the terminal (OF2) to "1"(#5T130) and set the terminal (OF2) to "H" in step (#8T140) to start boosting.
level and proceed to step (#5T180). On the other hand, if it is not set, reset the above bit (STS+) and proceed to step (#8T180) (#5T15
of. If a signal for canceling the guide number restriction is input from the camera, the process proceeds to step (#5T183), and control for canceling the guide number restriction is performed. When the signal is not input, it is determined whether or not the guide number restriction switch (Lo) is turned on.
IP = r LJ) Flag indicating this restriction (LoLMT
F) is set (#8T18
1. #5T182). When set, reset this and set the terminal (OF2) to the "L" level to prohibit the light emission stop signal from the monitor circuit (MONT) from being input to the light emission control circuit (#5T183. #5T1
84).

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 (STSs) (#5T186. to #5T187 ). switch(
When LO) is not turned on, step (#5T19
Proceed to 0).

Note that this step (llsT190) requires step (#
5T184) and (#5T187).

In step (#5T190), the electronic flash device (ST)
As the output side, the terminal (I/QC) is set to r ) (J 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
) (#5T200), wait for the data communication clock (SCK) to be sent from the camera body, and then wait for the data communication clock (SCK) to be sent from the camera body. When this happens, communication is controlled to output data through the terminal (S0ut) and the input/output switching circuit (IloCG) in synchronization with this (#5T210).
, After completing this, set the terminal (OL) to "L" level (llsT220), reset the above timer,
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 "H" level.

The microcomputer (μCa) inputs this to the terminal (IP+),
The process advances from step (#5T230) to (#5T240).

In step (#5T240), the terminal (OL) is set to r) (J level as described above, and the terminal (I/QC) indicating input/output control is set to "L" level (#5T250).
), 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 (SCK) is input to the terminal (SIN) through the input/output circuit (IloCC), and read into a predetermined register (RAM) (#5T260 . #5T270
). Then, the terminal (OPl) is set to the rlJ level so that it can receive pulses from the camera (#5T2
80). 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 (llsT290), it is determined based on the input data whether or not the power is to be 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, the terminal (OF2) is set to "H" level, voltage boosting is started, ON is displayed, and the process proceeds to step (llsT330).
lsT300~#5T320).

In step (llsT330), it is determined whether or not the power is forcibly turned off based on data from the camera. Force O
When it is FF, the microcontroller (μC3) turns off the ON display and
The flag (ONF) indicating power OFF is reset, the terminal (OP2) is set to the rlJ level, voltage boosting is stopped, and the sleeve is activated (#5T420 to #5T440). On the other hand, if it is not forced OFF, proceed to step (#5T340),
Reset and start the timer and determine whether 5 minutes have elapsed (#5T35. If 5 minutes have elapsed, proceed to step (llsT420) and perform the same control as for forced OFF. If 5 minutes have not elapsed , determine whether or not exposure control has been entered (#5T360); if exposure control has not been entered, return to step (#5T350) and step (#5T360).
5T350) and (#5T360) are repeated. The signal from the camera indicating that it has entered this exposure control is sent to the terminal (
This is a signal with a pulse width (T3) input through the STY. The detection circuit (TM) detects this and connects the terminal (EC
) to rH' level. When this signal is input, the microcontroller (μC3) resets and starts the timer (
#5T370), the terminal (OPI
) is set to "H" level (#5T400), and when no light is emitted, the terminal (OPI) is set to "L" level, and the process proceeds to step (#5T412). This step (#5T41
2) Wait for the time (=150 msec) from turning on the switch (Sa) (7) to the completion of the shutter's front curtain travel + α (light emission time of the electronic flash device), and then turn on the terminal (OPI).
) to rLJ (#5T415), so that even if an interrupt pulse from the camera comes in, it can be processed, and the process proceeds to the switch (#5T80) in FIG. 8(C).

In the circuit of FIG. 8(a), the AND circuit (AND+) is designed to operate only during the exposure control operation, and is adapted to receive a dimming completion signal. AND circuit (ANI1
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 (OPI) to "H"/"L".

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

A signal (C8ST) indicating the type of data communication to the electronic flash device (ST) (the pulse width changes depending on the type), a clock (SCK) during communication, and a 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
), a high level rHJ 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 in accordance with the signal from the electronic flash device (ST).

In FIG. 11(a), the microcomputer (μC) of the camera outputs a pulse with a width of a certain time (tl) to the terminal (C3FL) in order to perform data communication (input on the camera side) with the electronic flash device, and Set the QC terminal to "L" level, wait for the electronic flash device to set data with the input/output circuit on the input side, and input data once by serial communication (#6
50~#655).

Return to Figure 6 and step the AF mode ($1417)
Determine. A subroutine for determining the AF mode is shown in FIG. 7(a). First, from the lens information, it is determined whether or not the above-mentioned lens side switch (So) is turned on (#400. If this switch is turned on, the power holding time is reset and started. (starts from 10 seconds), step (#4005) t-7 lag (OF
Set F). , Determine whether the card function is ON or OFF based on the 0N10FF signal of the card function input through data communication (■) (described later) (#4007)
.

If the card function is OFF, the E2FR 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 AF mode is controlled based on the information in the E2 PROM 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.

Note that 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. Do this only if you decide to do so.

The microcomputer (μC) reads information from the E2PROM in the camera and determines whether the AF mode is the focus lock mode or not in step (#4010). Here, when in focus lock mode, switch (SO
), set the focus lock bits (F, b+,), reset the auxiliary light mode bit (Fbe3), and when the tracking mode is displayed,
Reset the flag (following F) to turn it off (#
4020 to #403.

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

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

Next, determine whether the AP mode is spot AF (
#4035) This step (#4035) also comes when the focus lock mode is not set in the above step (#4010). In the case of spot AF, it is determined in step (#4036) whether or not a flag (SQONF) indicating that the switch (So) is turned on and this flow has been passed for the first time is set, and whether or not it is set is determined. If not, proceed to step (#4037) and change the contents of bit (Fb2) to bit (
Fb+s), reset the above flag (SQONF) #4038), set spot mode in step (#4040) Fb2=1), step (#4045)
Proceed to. If the flag (SQONF) is set, the process skips step (#4037) and proceeds to step (#4045). In step (#4045), it is determined whether or not it is continuous AF, and if it is continuous AF, a bit indicating this (Fb, =
1) should be set #4050), and the bit indicating the auxiliary light (
Fbe3) in step (#4055) and return. It is now assumed that the auxiliary light mode for continuous AF is prohibited in consideration of power saving.

Continuous AF that never finishes focusing,
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 continuous AF is not used, return immediately. In addition, in the flow when the switch (SQ) is on, only one of focus lock, spot AF, or continuous AF is set on the IC card, so for example, step (#40
If the focus is locked in step 10), step (
li4035) and (#4045) are both NO.

In step (#4000) above, switch on the lens side (S)
When O) is OFF, the process advances to step (#4060).

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

Spot AF is selected by the switch (SO), and it is determined whether the control is to be performed immediately after the switch (SO) is turned off by checking whether the flag (SQONF) is set (114065). In this case, by moving the contents of the bit (bus) to bit (b2), the multiple points/spots before being selected by the spot AF by the switch (So) can be obtained (#4070). and,
Reset the flag (SQONF) and proceed to step (#40
87). When the flag (SQONF) is not set in step (#4065), it is determined whether or not forced spot AF is performed using an IC card (close-up card), and if it is forced spot AF, a bit (Fba) is set to indicate spot AP. Set the step (#4087
). If it is not forced spot AF, step (#
4085) and proceed to step (#4087). Next, in step (#4087), check whether it is a forced continuous AP or not (sports card).
When forced continuous AF is selected, the bit (Fbe) indicating this is set and the bit (Fbe3) is set to prohibit the auxiliary light mode.
) and return (#4゜88, #40
89). When not forced continuous, reset bit (Fbs) to indicate one-shot AP (#40
90) and return.

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

Regarding this card data communication (n), No. 511!10 (
This will be explained with reference to b).

This data communication first sends data from the camera to the card indicating data communication (n) (serial communication 1
times) (#320 to #327), the camera becomes the input side (
Wait with #330) (#332) L, perform serial communication once and obtain 10 bytes of data (#335)
. 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, the 7th 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 by the bit (be) of the 3rd byte 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 the AF prohibition data input in communication (II) is set or not (#425). , it is determined whether the AF start switch (Sl) is turned on or not based on the level of the terminal (IPs) (#427). The above switch (
SL) is turned on (■P5=“L” level)
, AF control (71429), switch (31)
(7) Indicates ON and sets t'7 lag (SIONF) (#430).

AF based on the data input from the card during communication (n)
When prohibited data is set, when self-timekeeping is in progress, or when the switch (Sl) is set to 0FF (I
When Ps = '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 #4
31), flag indicating that AF is not being performed (AFN
F) should be set #435), change switch (Sl
)(7) 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, even if the AF start switch (Sl) is pressed by mistake during data setting, AF operation will not occur. I'm trying to prevent it from happening. In addition, the above flag (AFNF
) is set, a signal (AEFLAG b+) indicating that image magnification data cannot be used is set to "0" and output to the card during data communication (I).

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 (LM4) indicate the photometry range, and (API) to (AF3) indicate the focus detection range.

Regarding the focus detection range, the camera has a spot/focus detection range.
Multi-point AF can be switched, and when spot AF is selected, AF is performed based on subject information in the focus detection range (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. Below, (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 the button is not pressed for the first time, the flag indicating focus (AFEF), the flag indicating low contrast scan inhibition (LSI [(F)), and the flag indicating the beginning of low contrast scan (LSFI) are reset, respectively. #702. #703. #704), proceed to step (#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 or not based on the input signal from the lens (#705)
. Then, if the lens is not attached in step (#705), set a flag (AFNF) indicating that AF is not being performed and return (#8°O).
.

When a lens is attached, forced AF mode (forced AF even if manual focus adjustment is selected)
mode and enables lens drive by motor)
Determine whether or not is selected by the card (#
707). If in forced AF mode, step ($17)
Proceed to step 11). On the other hand, when it is not forced AF mode, you can check whether the focus adjustment mode is AF mode/M mode by terminal (
#710), AF
mode, the bit (F
b+4). When in M mode, the auxiliary light mode is prohibited in step (#798) (Fbt3
"0), after executing the manual focus subroutine CMFOCUS) in the next step (#799),
Set the flag (AFNF) to indicate that AF is not being performed (#800), and determine whether or not focus is achieved (#780)
), if in focus, set the flag (AFEF) $1
781), if it is not in focus, reset it (#782),
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 integral control is performed to control integration and execute data dump6. Then, in manual focus, among the three islands in the AF area, Set the flag (AF2F) indicating the second island, and set the day focus amount (DF2) of this island.
is calculated, used as the day focus amount, and returned (#4100 to $14110).

The integral control subroutine in the above step ($14101) is shown in FIG. 12(b) and will be explained first.
When the focus cannot be detected (LCONF・1) or when it is not in the auxiliary light mode (Fb+3・0), the process proceeds to step (#4163) without emitting the auxiliary light (#4150)
．． #4155). When focus detection is not impossible and the mode is auxiliary light, the terminal (OLD) is held at r for a certain period of time to emit light before the start of integration and emit light for a certain period of time.
Set it to HJ level and proceed to step (#4163) (#
4150~#416.

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

Next, perform integration and count again after the integration is complete (CT)
Read and set this as (CT2) (#4165.
#4167). The average of (C'r+) and (CT2) is calculated, data is input (dumped) as (CTI2), and the process returns. (#4168, #4170).

Returning to FIG. 12(a), if manual focus adjustment is not selected in step (#710), or if forced AF 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 (SG), the lens drive is stopped in step (9712) and the flag (AFE
It is determined whether F) is set #713), and if it is set, proceed to step (#714),
The M focus is controlled and the process proceeds to step (#780). If not set, step (11799
).

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

When AF is determined in step (#710) of FIG. 12(a), and focus is not locked in the next step (#711) (Fb14=0),
15) indicates that AF is not being performed (AFN
F), 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, inputs the data obtained by digitally converting the integral value (J1720) . Then step (#7
30) to detect whether it is spot AF or not (Fb of function data
2) and spot AF (Fb2=1),
Proceeding to step (#735), the spot AF subroutine shown in FIG. 12(d) is executed. 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 #4110).

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 (114200 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 required. 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. , the above flag (
AFIF - AF3F) and return (#
810~#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) (71755), and returns. In step (#747), if the auxiliary light mode is not selected, proceed to step (7757) to detect whether the brightness is low or not. If the brightness is not low, it is useless to emit the auxiliary light, so the low control Controls scanning. 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, it returns without performing low contrast scan. If not entered, a flag (L
SFI) is set or not #441
0), if it is not set, please set it.77
4415), sets a flag (FWF) indicating the feeding direction (#4420), and sets the lens drive amount n to a positive value (K large) larger than the maximum lens feeding amount (#44
25) Drive the lens 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, the lens is stopped (#4430), and it is determined whether or not the lens was extended before the stop (#4440). In order to detect this extreme end, a hard timer (not shown) is working, and this hard timer is reset and started every time a pulse from the encoder is received. 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 a payout (FWF=1)
Reset this (#4445), and then set the lens drive amount to -(K large) to control the renormalization (#4
450), 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 (11757) in FIG. 12(a), it is determined in step (#758) whether or not the auxiliary light from the card is prohibited, and if it is in the prohibited mode, step (#752) is performed. Proceed to step (
#760) as auxiliary light mode (Fb+3=1),
Proceed 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 the flag (AFEF) that indicates the focus state ($1767), set the flag (AFEIF), and step (#755)
Proceed to.

If the focus is not in step (#765), step (#765)
After proceeding to $1775) and executing a lens drive control subroutine, the process returns. This subroutine is the 12th subroutine.
As shown in Figure (e), the flag (
Determine whether tracking F) is set (#42
48). If it is the follow mode, proceed to the switch (#4330). When the flag (tracking F) is not set, either one-shot AP (-once the lens is in focus, the subsequent lens drive is stopped, and focus detection may also be stopped at this time) or continuous AF (after focusing (follows the subject and drives the lens according to the required day focus amount)
Determine whether it is based on data (Fbs) (#4250)
. In the case of one-shot AF (Fba=O), check whether the flag (AFEF) indicating focus is set (114).
255), and if it is not set or in the case of continuous AF (Fbe-1), step (#4330) and (#4335) are performed.
4340), the lens drive is controlled. In step (#4330), a flag (AFEF) indicating focus is reset, in step (#4335) the lens drive amount is determined, in step (#4340) the lens is driven, and the process returns. The lens driving in this step (#4340) is performed by the lens driving circuit (LECN) driving the lens by a value corresponding to the driving amount (N).

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 as (DPI) (#4342). Then, find the day focus amount DF = DF + (DF - DF2) (DF2 is the previous day focus amount, that is, the difference between the previous and current day focus amounts is added to this time), and (DF, ) 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 (Cr2), 80T.
3 Calculate ΔCT as the amount of movement of the lens from the center of integration in CT12, subtract ΔCT from the above N to determine the amount of lens drive at the end of calculation, and return (#4346) ~
(#4348).

In step (#4255), when the flag (AFEF) indicating that focus is set is set, the process proceeds to step (#4257). Then, it is determined whether or not forced one-shot AF is being used, and if it is forced one-shot AF, the process returns immediately. 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 achieved from an unfocused state is set ($4280).

When set, preparation processing for tracking determination (determining whether the subject is moving), which will be described later, is performed.

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 (DPI) (114270), and the variable (N) should be set to O (#4275), above (AFEI
F) (#4280) and return. In step (#4280), after focusing (AFEF=1
), when performing focus detection from the second time onwards (AFEIF=O
), 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 (DF
3), the contents of the register (DPI) are transferred to the register (DF2).
), store the obtained day focus amount (DF) in the register (D
Add 1 to the variable (N) and store this (
It is determined whether N) is 2 or more, that is, focus detection has been performed three times after focusing, and if it is less than two times, the process returns without driving the lens (#4285 to #4305).

In step (#4305), if it has been performed three or more times (N22), 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 (focus 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/Ml is AF display 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+OFF 20), 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 (n) #905
), returns if the mode is display control mode from the card (during data setting). 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 is difficult to determine whether the exposure mode change switch (SFM) is turned on or not #9
10) When it is ON, the process proceeds to the change subroutine (#915) and returns (details will be described later).

When the above switch (Sεi) is not turned on,
Proceed to step (#920) and select the function change switch (SF).
LIN) is turned on. If this switch (SFLIN) is turned on, the process advances to a subroutine for changing the switch (#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→A-+S-+M and then returns to P, and each time the down switch (Sdn) is turned on, the process progresses sequentially to P4. - Proceed like A4-84-M and P
Next, the E2PR inside the camera moves cyclically in the opposite direction to the up direction mentioned above, like moving to M.
Depending on the OM data or the data in the custom card, the I
The exposure mode is changed according to the exposure mode set by the C card (CD), and unselected modes are skipped.

To explain this with reference to FIG.
) is 0N1 of the card function input in data communication (I[)
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 E2PROM in the camera. On the other hand, if it is a custom card, the data sent through data communication (IV) (EEC8TM=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 turned on, the microcomputer (μC) determines whether the up switch (Sup) is turned on or not, and if it is not turned on, the microcontroller (μC) determines whether or not the up switch (Sup) is turned on.
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 or not using the internal E2 PROM. 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 (Fb+),
Return (#1020-1030).

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 control when the function change switch (SFIJN) shown in FIG. 17 is turned on 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). Shiku1112
25), progresses as +/-→S/C→S/A, and after S/A returns to +/-, and so on, and changes the data of the 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
o, Fb+o) (#1280), and if the function is +/- mode (#1285), the exposure compensation amount (△
0.5 is added to Ev) and the process proceeds to a subroutine (#1287) that determines its size. This subroutine is the 18th
As shown in the figure, if the correction amount (ΔEv) is positive, data Fb4. Fbs” 0.1, −
For side correction, data Fb4. Fb5=1. O, and if the correction is zero, data F is assumed to have no correction.
b4. Return as Fbs = O, O ($
11350~#1370).

Returning to FIG. 17, in S/C mode, data (F
bz) 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 (
+/- 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 (Fbz), and change the data (Fbz) so that it is opposite to the current mode.
Change Fbz) #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 (Sε.).

If both function change switches (SpuN) 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
05), it is determined whether the down switch (san) is turned on, and 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, + = 1.0), the process proceeds to step (#1811) and it is determined whether or not the aperture change switch is turned on. If it is turned on, step (# 1830) and subsequent steps, and if it is not turned on, go to step (#1850) to change the shutter speed.
). First, to explain how to change the shutter speed, add 0.5Ev at step (#1850) and step (
Proceed to #1855). 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 it is determined in step (#1810) that the mode is not M mode, it is determined in steps (#1815) and (#1820) whether the condylar mode is P mode or A mode. When the mode is P mode (Fbo, +=O, O), it is determined whether 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 (A
v) Please set the maximum aperture value (Avmax) #1
840), if it is not exceeded, do nothing and step (#
1845) to determine whether the mode is P mode or not.
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+ = 0.0), 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 the step (#182
Proceed to step 3) to increase the shutter speed (Tv).

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+ = 1.0)
, determine whether the aperture change switch (S, .) is ON (#1877); if it is ON, go to step (#1885) to change the aperture; if not, go to step (#1885) to change the shutter speed. Proceed to #1905). Step (#1905) subtracts 0.5Ev from the set shutter speed and determines whether this is slower than the camera's minimum shutter speed (Tvmin) #1
907), 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 (Av
o) It is determined whether the aperture value is smaller than the aperture value (Avo), 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, + =
Determine whether or not P shift is prohibited (#1872), and if it is prohibited, return.

If it is not prohibited, proceed to step (#1885). When not in P mode in state (#1870) (Fbo, 1≠0.0), step (#1875
) to determine whether the mode is A, and if it is the A mode, proceed to the flow for controlling the aperture value reduction after step (#1885); if not, proceed to step (#1879) assuming that the mode is S. ) and control the shutter speed down.

In FIG. 15, after controlling the settings of (Av) and (Tv), it is determined whether the normally open self-switch (Ss[tp) is turned on. When OFF (IP+2= r H
J) returns immediately.

The self subroutine when ON (IP+2''' L J) is shown in Figure 19 and explained. When the flag (SELFF) indicating self mode is set, it must be reset (#945) and self mode is activated. If the flag (SELF) is not set, the flag (SELF) is set to execute the self mode (#950) and the process returns.

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 the Hj level, the photometry circuit (LM) is commanded to output photometry data, and serial communication is performed (#1605. #161).

Through this communication, the brightness values (Bv, to BVJ) of the four photometric ranges shown in FIG. 14 are input. When communication is completed, the terminal (C8LM) is set to "L" level (#1615
). Next, in step (#1617), set BV2 to Bvc.
Enter the value, and in step (#1618) proceed to BUIIUE (#1622), determine whether the flag (AFNF) indicating that it is not in AF mode is set, and then in step (#1624), proceed to BUIIUE to (#1622). Determine whether the flag (LCONF) indicating that it is possible is set,
If either one is set, proceed to step (#1660) and set the small photometry range (
LM2) is the spot value (Bvsp). Flag (A
When FNF) and (LCONF) are not set, the distance is calculated from the feed pulse, and based on the calculated distance information and focal length information, the image magnification β is calculated from β=focal length/distance (#1B25). , in the next step (#1630), this image magnification β is set to a predetermined value (
K) Determine whether or not the above is the same, and determine the size of the subject that occupies the photographic screen. 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 (LM+
), (LM2), (LM3) brightness values (BVI),
The average of (BV2) and (BV3) is 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 (APIF - AF
3F) is set, and if the flag (AFIF) is set, the brightness value (Bv+) of the photometry range (LM+) + flag (AF2F)
is set, the brightness value (BV2) of the photometry range (LM2), and when neither flag is set, that is, the day focus amount of the third island (AF3) is selected, the photometry range Let the brightness value (BV3) of (LM2) be the spot photometric 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) AE floc 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) ($11745), reset the timer (T1) for power retention, and start #175, spot photometry value BV.
2 as the spot value (Bvsp) (#1752) and returns. Like this AE Flok Switch (SotL)
When it 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 (17455). This data communication is
To explain with reference to figure (C), the microcomputer (μC) is
The presence/absence of communication (III) is determined based on the signal input from the card, and if there is no communication (III), the process returns. It is empty when no card is installed. Communication (I
II), set the terminal (C3CD) to r) (J level #350), set the data (#352), and
Output the data to a card (CD) ($1355).

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 designated (#362-1).

In the case of group designation (sports cards, snap cards, etc.), group designation Go, Gl, G2. Controls the output of the G3 group data to the card. First, group G. Set the address of #382-2) and perform serial communication 15 times (#362-3).

Go, Gl, G2. G3 data is lens drive and AE
Data for calculation (-Tvc... Control shutter speed G3
Lpmax...Lens maximum extension amount, and then whether or not the data of group G is necessary is determined based on the data obtained in communication (II) (#3132-4). Return if not needed. If necessary, the address G of the GI data
1 is set (#362-5), and serial communication is performed three times (#362-6). Next, determine whether the data in G2 is necessary, and if necessary, set address G2,
Perform serial communication twice. Next, it is determined whether or not the data in G3 is necessary, and if so, address G3 is set, serial communication is performed once, and the process returns. If the group is not specified, please set the address based on the address with the necessary data entered from the card #362-7
), serial communications are performed for the number of serial communications input from the card (#362-8). Furthermore, communication (III)
There is no addressing type in .

Upon completion of the above-mentioned card data communication (III) in FIG. 6, the microcomputer (μC) proceeds to step (#460) and performs exposure calculation in step 22.

The flow of this control is shown and explained in Figs. 23 to 27. In Fig. 23, the microcomputer (μC) first outputs a light emission signal, which is output data to the electronic flash device, to 11 forced 0N=O
, Forced 0FF=O, Initialize GN control release=0 (
#2000 to #2003). Next, step (#200
In step 4), it is determined whether the lens is attached based on the input lens data, and if it is not attached, the photometry value (BVIIM) of the photometry range (LMa) (
Instead of this, the overall averaged photometric value may be used), film sensitivity (Sv) and exposure compensation value (ΔEv) are added,
Calculate the shutter speed and return (#2005),
If a lens is attached, determine whether it is forced P mode based on the data input from the card #200
6) In the case of forced P mode, return without performing exposure calculation. If it is not the forced mode, exposure calculations are performed according to each exposure mode ($12,010 to $12,040).

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 backlight condition is determined using the photometric value (BVAM) of the photometric range (LMa) and the spot photometric 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 or not an electronic flash device is installed (switch S0 of the electronic flash device is ON), and if it is installed, the control exposure value (Ev) is set. Photometric value (B) of photometric range (LMa)
VAM), etc., Ev= BVAAll + Avo+5v
-1+ΔEv (#2115). Here, the reason for subtracting 1 is to make the background appear to be over IEv 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 is shown in FIG. 24(b) and explained as follows.
Tuning the shutter speed control value (Tvc) = 7
(33=17125), 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). Then 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
Calculate by pt-Avo+Sv+ΔEv (Proceed to subroutine (#2135) of program ■ to find aperture value (Av) and shutter speed (Tv) in #213, and step (
#2170) and returns.

This subroutine is shown and explained in FIG. 24(C).
First, in step (#2250), set the aperture value (Av) to Av=
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
Proceed to step 6 (#2280). Step (#2
255), the aperture value (Av) is the maximum aperture value (Avm
ax) or less, the aperture value (Av) is equal to the open aperture value (Av
.

), 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 #2275
).

In step (#2280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev), and in the next step (112285) it is determined whether this is greater than the maximum shutter speed (Tvmax), and if it is, the control shutter speed is The speed (Tvc) is limited to (Tvmax) (#2290), and if it is not larger, it is determined in step (112292) whether or not it is slower than the slowest shutter speed (Tvmin). ) as the control shutter speed #2293), and if it is not slow, calculate the shutter speed (T
v) as the control shutter speed (Tvc) #2295
), reset the light emission signal (20) to prohibit light emission (
#2298), return.

Returning to FIG. 24(a), in step (#2100), when the difference in Buan Bvsp is less than 2, it is determined that there is no backlight condition and the process proceeds to step (#2145), where the average photometry of the photometry range (LM+) to (LM4) is performed. Value (Bv+ +
BV2 + BV3 + BvJ)/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=
6.1760) (#215
5). Then, when the speed is less than the camera shake warning speed, it is 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 $12345). 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 (Ev) to determine the shutter speed (Tv) (#2315. #2320
), In the next step (#2325), it is determined whether the shutter speed (Tv) is larger than the maximum controllable shutter speed (Tvmax), and if it is larger, the maximum shutter speed is set in step (#2330). speed(
Tvmax) is set as the control shutter speed (Tvc) and the process 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 in step (#2335).
is set as the control shutter speed (Tvc), 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 (#2400), 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 ($2515) is set as the control aperture value (Avc), and in the next step (#2520), the shutter speed (Tv) is set as 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 computation time is long in the case of a deformation card.

FIG. 5(d) shows a flowchart of this control. First, it is determined whether communication (IV) is necessary or not.
), and if it is not necessary, return. If necessary, the terminal (C8CD) is set to "H" level (#367), serial communication is performed with the IC card (CD) (#375), and the IC card is notified that the IC card is on the output side. Here, I'm waiting for the time#
377), input data from an IC card (CD) by serial communication using the camera as the input side #382
), and when this data communication is completed, the terminal (C8CD) is set to “L”.
' level and return.

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
, G+, 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 . . . Shutter speed shift 1st group specification will be explained.

Go...Display data being set...9 serial communications G2...ΔLp...lens drive pulse...1 serial communication 6th Returning to the figure, when data communication (IV) with the card is completed, the microcomputer (μC) outputs 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 #467
-1), if not ON, proceed to step (#467-10). When it is ON, step (#467-2) (#467-2) (#
467-4) (#467-6) (#467-8), the control signal is forced ON, forced OFF, 0M, respectively.
When restrictions are released or non-emission is indicated, step them (#467-3), (#467-5).

(#467-7), (#476-9), and if the above four are not shown, (#467-3'
), (#467-5'), (#467-7")(
#467-9°) to reset the signals respectively and step (#467-9°).
467-10). In step (#467-10), the terminal (C8FL) is set to the 'HJ level for a certain period of time (T2) to indicate to the electronic flash device that it is the data output mode from the camera. The camera uses an input/output switching circuit (IloC).
G) as the output side (rHJ), wait for the predetermined processing within the electronic flash device, and then perform 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 (11470). Based on the data you entered, this flow will
Figure 28 shows the determination of whether or not to control the camera and the operation of the camera in such a case.
Based on the data input from the C card, it is determined in step (#2610) whether or not the camera is controlled by the card;
If the camera is not controlled by the card (CDFNF=O
) returns.

If it is determined that the camera is controlled by the IC card, it is determined whether the data input in the communication (IV) is the aperture (Av) and shutter speed (Tv), and (Av)
(Tv) data, control aperture value (Avc),
Control shutter speed (Tvc), film sensitivity (Sv)
are determined based on the data input from the IC card (#2615 to #2630).

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), add (ΔSv) to the film sensitivity (Sv), and return (#2840 to $12850).

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・・・・・・・・・ba. In b+, one of the currently set modes P, A, S, and H is input, and in b4 to b6, eight types of data are input, each of which is a mode setting by an IC card. ba, ba
controls blinking, lighting, and extinguishing of data b4 to b6.

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

Batokan/Head day display...This is data for displaying the Patokan mark and the Vero mark, and BO is control data indicating whether the light is turned on or off.

Card display: b+, ba (address D
P6H) is the data of lighting and turning off of each display of exposure compensation +/-, bs, be (address DP6H)
controls the selection of single shooting/continuous shooting and turning off the display, bo,
b+ (address DP7H) is control data for flashing, lighting, and turning off the card display, b4, bs (address DP7H)
) respectively indicate 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) bl...
・Static high (main switch ON, S+O
FF) ba...Card display bs...Initial load b4...81 ON b5...Rewinding LED Infiner indicator ``bo...Focus display presence/absence,... Presence/absence of focus detection ba...Presence/presence of tracking mode bs...Presence/presence of multi-point AF b4...AF/M are shown, respectively.

Flowchart of the display microcontroller that controls this display
This is shown in FIG. 29(b) and will be explained. Display control circuit (D
ISPC) to the camera's microcomputer (μC) terminal (CSD).
When a signal that changes from "L" to "H" is input from the ISP), 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 or not it is in all-lights-out mode from the input control data #D-10
), in the case of all lights off mode (DP9H, bo=1),
All lights are turned off with nothing displayed (#D-15). If it is not in all lights off mode (DP9H, bo: o), determine whether it is in standby mode or not #D-20), if it is in standby mode (DP9H, b+ = 1), the currently set AE mode Change the display to DP3H bo,
Display based on b+ (#D-25). DP6H,
The position of the cursor (Δ) is displayed based on the card display based on the information of DPv+ and the data change display data of DPa++, 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 cloth, △ mark (cursor) at the exposure compensation position, exposure compensation mode disabled, 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 (II
D-45). When the initial load is (DP9+,
b:+=1), only the film number display (DPs+), and button/velo display are displayed, and the other lights are turned off (
#D-50 to #D-60). FIG. 29(d) shows that the film is loaded and is in the initial load state. During rewinding (DPeH, bs=1), Figure 29(d)
The "-" symbol indicates the number of films being rewound at that time.

When not rewinding, determine whether a card is displayed (1
10-70). When displaying a card (DPIH, b2=1
), DPIH data is decoded to display card name, numerical value is displayed based on DP2H data, Dho's b
2 to b6 are used to display what is selected (selected) by the IC card, and furthermore, numerical values are displayed based on the data of DP4H, and card display is controlled based on bo and b+ of DP7H (# D-75 to #D-95). The display of this card will be explained in detail later. Step (#
If it is not the card display mode as determined by D-70), proceed to step (#D-105) and turn on the switch (S+).
If it is ON, the in-finder display is performed based on the in-finder information (#D-110), and if it is not ON, the in-finder display is not performed, and each step is (#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.
AE mode display based on P2H bo, b+, Dh
Display of film number based on H, Patokan display based on DP4H, DP6141? Card-related information is displayed based on the information of DPIH, data change (Δ) is displayed based on the information of DPIH, be of DPe8, b7. Displays AF mode and self based on DP+on bo (#
0-115 to #D-155), an example of which is shown in FIG. 29(a) and an example of the display control (display data creation) on the camera side.
00), it is determined whether the card display control is being performed or not based on the data obtained in the communication with the card (n), and if it is the card display control, 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,
Serial communication is performed 12 times (#2720) as a mode for outputting data created by the camera (shutter speed, aperture value, number of films, etc. - see FIG. 29(e)) (#2710). Next, in step (712735), 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 from the card is Determine whether there is one ($12,740). 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 (#2745) is executed.
2765). If it is not a camera shake warning, proceed to step (#2765) without issuing a buzzer warning. If the card does not have the buzzer control authority, it is determined whether the shutter speed determined by the camera is less than 6 (#2750), and if it is not, the process proceeds to step (#2765). If it is less than 6, communicate whether the card function is turned on (II)
If it is not ON, determine whether there is a buzzer warning based on the data in the E2FROM in the camera. Otherwise, proceed to step (#2765).

If the card function is ON, it is determined whether or not it is a custom card (#2758); if it is not a custom card, the process proceeds to camera control and the above-mentioned control is performed.

If it is a custom card, the communication entered from the card (
IV) Determine whether or not there is a buzzer based on the data #2760), and if there is, set a buzzer warning 11275
6) Proceed to step ($12765), and if there is no buzzer warning, proceed to step (#2765). In step (#2765), E2P from the custom card
Determine whether there is a write control signal in the RO,
Write data from custom card in communication (IV) when it is (#2770), step (#277
Proceed to 5). When there is no write control signal, skip step (#2770) and proceed to step (#2775)
Proceed to.

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 PROM 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), to force the exposure mode to P mode, Set the data (Fbo, Fb+) to (0, 0) #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), determine whether the release switch (S2) is turned on, and if it is not turned on (IF7, "H"). The program proceeds to step (#520), permits all interrupts, and returns.

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

When selected (SELFF = 1), set the flag (SLP) indicating self-timekeeping (#477) and reset and start the timer (separate from power hold) (
#478). Then, in order to maintain the power supply, a flag (OF
F) should be set #479), AE flock flag (AE
LF) is set (#480), the measured value is fixed, and the process proceeds to step (#180).

Step (#481) to proceed to step (#481) when not in self mode (IP+2='HJ) in step (#475) in Figure 6.
), 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 (11490). When not in manual focus mode, step (#485
). In step (#485), it is determined whether or not a flag (AFEF) indicating focus 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(e).

First, the microcomputer (μC) determines the presence/absence of communication (V), and if there is no communication, returns, and if there is, it returns to the terminal ((:5
CD) to rH” level (#390), and communicate (V).
11391), the camera side is output (#392), and serial communication is performed once (#393). Next, set the data, use the camera side as an output, and perform serial exchange once. Waiting for time #3
94), set the camera side as input #385), performed serial exchange 8 times (#396), and connected 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 (iii) Control F value (iv) Control shutter speed (V) Exposure compensation value (vi) Exposure mode (vii) ) Exposure mode (viii) 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), and
If N (IP?='LJ), it is determined whether a forced continuous copying signal from the card is being input. If it has been input, the process advances to step (#515), and if it has not been input, it is determined in step (#510) whether or not continuous shooting mode is in effect, and if it is in continuous shooting mode (Fb3
= 1), enable all interrupts in step (#515) [
Proceed to the SO3 routine. When not in continuous shooting mode (Fb
s=O) returns to step (#505) and waits for the release switch (S2) to be turned off. When it is turned off, all interrupts are enabled in step (#520) and the process returns.

Next, the exposure control subroutine of step (#495) is shown in FIG. 30(a) and will be described. First step (#
At step 2805), the terminal (C8ST) is set to r) (J level during (t3)) to indicate to the electronic flash device (ST) that it is in 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 (#2822-0), and if it is ON, 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. ) Return. When the above signal is present, the lens drive amount (Δn
) (#2822-3), stop the lens (#2822-4), and wait for mirror up to be completed (#2822-5). Mirror up is completed (IP2
o: "L") and returns.

Next, returning to FIG. 30(a), the shutter speed is controlled (#2825), and the [lens drive REL]
Perform I [control] ($12830) 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, it should be determined whether there is a snap drive bit signal (#2830-1), and if there is, the signal is the opposite of the above (-
Δn) (#2830-2), stop the lens (#2822-4), and return. When there is no signal of the above-mentioned bit, it is determined whether or not a default card is inserted (#2830-5). If it is not a default single card, return. In the case of a defo-force single card, the count pulse number (CNT) at the current position of the driven lens is set as CT'” #2830-
6), the difference (Δ) from the lens position (CT”) before driving
n) and (#2830-7) step (#283
0-2), 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 (112836), and the first act (not shown) is started (#2837). Then, it is determined whether the card function is ON or not (#2838), and if it is OFF, the process moves to the flow of waiting for the exposure time (T) to elapse (#2846). 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 def focusing card, the pulse currant at the current position of the lens is set as CT' in memory L (#2840), and the exposure time (T) is set to 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 defocusing card, the exposure time (T) is determined (#2846), and when the exposure time reaches T, the second act (not shown) is started (#2847) and the travel is completed. Wait for the waxing 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 (T3
) (#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) is a switch (Sun) that indicates that one frame has been wound in the step (#2860).
It is determined whether or not O)J is turned on, and if it is not ON, it is determined in step (#2865) whether 2 seconds have passed in this state, and if 2 seconds have passed, the control to stop the motor is controlled. (#2870), and if the film is taut, control the film tautness (#2875), and then set the cancel signal to 1 to cancel bracketing or auto shift that is continuous shooting (#2876).
Perform data communication I (#2877) and return. The above-mentioned subroutine is shown in FIG. 31(b) and will be explained. A signal to reverse the motor is output (#293
0), the film detection switch (SFLll) is
Wait until it becomes FF (#2935), and turn the switch to OFF.
When it becomes FF, in order to roll the film into the patrone room,
After performing motor stop control (#2955), return.

Returning to FIG. 31(a), when the one-frame hoisting completion switch (Si+oON) is turned on in step (#2860), the motor is stopped in step (#2880), and then the motor is stopped in step (#2890). ), the count number (N1) of the counter indicating the number of completed film shots is incremented by 1, and the process proceeds to step (#2900). In step (#2900), this number of films (N,)
Write F, 2 PRO old 2.

Next, when the back cover close detection switch (SRC) or the rewind switch (hu) is operated, the terminal (INT2)
A pulse signal is input to the microcomputer (μC), and the microcomputer (μC) executes the interrupt (INT2:] shown in FIG. ), then step (#
3005) detects whether or not the rewind switch (SRJ) is turned on. If it is turned on, the [rewind] routine shown in FIG. 31(b) is executed to perform the rewind operation. to enable interrupts and return (#30
10). If the rewind switch (SRJ) is not turned on, assume that the back cover close switch (SRD) is turned on.
Furthermore, to restore the bracket function or auto shift function, set the cancel signal (data used in communications) to O (
#3012) Proceed to step (#3015) and determine whether or not a film exists. If there is no film, therefore, if the film detection switch (SFLM) is OFF, proceed to step (#310) without performing initial loading.
Proceed to 0). On the other hand, if there is a film (that is, SFLM is ON), the terminal (C3DX) is
HJL/Bell, 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 (C3DX) to rLJ L/Berni. 6 (#302
0 to #3030). Then, set the number (N1) to -2 (#3035), and then set the terminal (C8DISP) to “H”.
” level and perform serial communication with the display control circuit (#
3045), a signal indicating initial load (DPs□b
3=1) and the number of films are output, thereby preventing data other than the data indicating the number of films (N, ) from being displayed. When serial communication is finished, the terminal (C8DI
SP) is set to "L" level (#3050). The value of the number of films (N1) is displayed using two 7 segments. Next, the microcomputer (μC) should output a signal indicating motor hoisting to the hoisting control circuit #305
5), Wait for one frame to be wound (#3060),
When the 1-frame winding switch (Sun) is turned on, 1 is added to the number of film sheets (Nl), and it is determined whether or not it has become 1. If it has not become 1, step (#3040) is performed.
Return to If it is 1, step (#3075)
Proceed to step (#3095) to stop the motor. Then, in step (#3095), the number of films (Nl) 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 added here that in this embodiment, setting and resetting the flag and setting the bits to 1 and 0 are the same.

In the above, the microcomputer (μC) on the camera side of this embodiment
Although various flowcharts have been explained with a focus on the operations, the control operations on the side of the IC card attached to this camera will also be explained using flowcharts. In addition, each type of card will be explained. A microcomputer (μC2) with a built-in E2PROM is built into the IC card (CD).

Next, the operation of sports cards will be explained.

<Sports card> When the sports card is attached to the camera, it executes the reset routine shown in Figure 33 and stores the flags and registers (RAM).
All are reset and put to sleep (S-5).

Next, connect the camera to the sports card terminal (C5CD) with “
When a signal changing from "L" to "H" is sent, the sports card executes the interrupt shown in FIG. Here, the sports card performs serial communication once in synchronization with the clock sent from the camera to input data indicating the type of communication (S-15).

From the data from this communication, determine the type.S-2
0), communication (1), set the card as the data input side and perform serial communication (S-30) to receive data (see CA-CD table) from the camera.

Based on this data, a data setting subroutine is executed and S-35) goes to sleep.

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

communication (in the old days, ・Auxiliary light prohibited (=1) ・FL forced OFF (・1) ・GN restriction lifted (・1) ・Whether the card controls the display or not ・0N10FF card function ・With/without hand buzzer ・P shift prohibited (=1) ・Forced P mode (=1) ・V No communication (・0) ・AP Continuous (・l) ・Forced AF (・1) ・Tv -Av / display data ・No. ■Communication Yes (・1) ・No.■Communication Yes (=1) ・Group specification (=O) ・Photometering loop repetition ・Hand shake buzzer control (・1) All signals other than the signal are set to "0", “1” or “0” depending on the occasion C3n-1-be C3II-L-bz CS II-1-bz CS II-1-b4 CS　U　-1-bs CS I[-1-by C3n-2-b.

cs If -2-bl CS II-2-bz C3II-2-b.

CS IF-3-bl csn-a-b.

CS II-3-b.

CS II-3-bs csn-3-b.

C3II-3-b? C5n -4-bo From the table, the * mark sets that, and when it is "1", that system? lll0N, OF when roJ
Let it be F.

For fixed values, rQJ and rlJ are determined in advance. For communication (I [), group 1 of communication (■) should be specified (C3ll-9-b+=1+communication (IV
) are two pieces of display control data, so CS 11-10-
b1+bz=1+t, otherwise set to "0".

Any data can be stored in the blank areas.

In communication (Vl), a signal indicating that the sleeve is available is sent.

This is because there is no write control to E''PROFI.

The data setting subroutine is shown in FIG. 35(a) and will be explained. In step (S-150), display control data
In the next step (S-160), it is determined whether the DISREQ (request for display of card name) signal obtained in communication (1) is "1" or not. If so, set the display control data to "1" and set the card display function to 0.
Turn N10FF ON (1) (S-170 to S-1
85). Next, in step (S-200), the flag (S
IF) is set, and if it is not set, it is assumed that this flow is going through for the first time, and this flag is set (S-205), and the timer is reset and started (S-210). (S-215
). Even when the flag (SIF) is set, the process proceeds to step (S-215). Step (S-2
In 15), it is determined whether or not the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, set the photometry loop repeat signal to "1" (S-220) and set data for displaying the card and only displaying the card (S-22).
2) Return. This display is shown in FIG. - way,
When 10 seconds have elapsed, the photometry loop repeat signal is set to ``0''.
” (S-225), reset the flag (SIF))
L (S-226), set the display control data to "0" (S-227) and return.

When DISREQ=0 in step (S-160), I
PS= rL J (Szs + 5Fus 1see
+ 5eDs + S+ is ON) S-162), reset the display flag (display F) indicating the control to display the card name when r L J S-163), If it is not rLJ, proceed to step (S-165) without doing anything, and set the flag (S-165).
IF). Thereafter, the process proceeds to step (S-260) in FIG. 35(b), and it is determined whether or not the self signal obtained in communication (II) is "1".

When the value is "1", a return is made to prohibit control by camera switch operation (card related). When the self signal is not “1”, step (C) in FIG.
S-430) and turn on the card switch (Sco)
The card switch (ScIl) is
When l) is OFF, reset this flag (SCDF) (S-460), then determine whether the display flag (display F) is set to 1- (S-465), and return if it is not set. do. If it has been set, the process advances to step (S-170) and the display of the card name is controlled. In step (S-430), when the card switch (Sep) is ON, check whether the flag (ScoF) indicating that the card has passed through is set or not.
If the switch is set, it is assumed that the switch continues to be operated and the process proceeds to step (S-465). If it is not set, please set it.
440), it is determined in the next step (S-445) whether or not the card function is currently ON, and if it is ON, it is set as OFF (communication H data) (S-45).
0) Return. If it is OFF, turn it ON (communication H data) and proceed to step (S-170).
Controls the display of card names.

Returning to Fig. 34, when it is not communication (I), communication (II)
When communication (II) is set, the card is set as the output side to output the data set above to the camera, and serial communication is performed 10 times (S-50).
) to sleep.

If it is not communication (n), determine whether it is communication (I) or not (S-51). If communication (I[[), use the card side as input (S-52) and perform serial communication 15 times. (S-53) Enter the camera data and proceed to the next step (S-53).
In step S-54), data for controlling the camera is calculated (including exposure calculation), and the camera goes to sleep. This calculation will be described later. If it is not communication (I [I), determine whether it is communication (■) S-55), if it is communication (IV), set the card to the output side S-60), and determine whether it is display control. S-65), display data is output during display control S-70), an address is set, serial communication is performed nine times (S-75), and the device goes to sleep.

When not display control (Tv, Avdeday), Tv,
The data address of Av is specified, serial communication is performed four times (S-85), and the device goes to sleep.

When communication is not (rV), - Assuming that communication is (Vl), first, serial communication is performed in accordance with the clock from the camera using the card as the output side (S-125), and the device goes to sleep.

Next, referring to FIG. 36, the step (S-54) in FIG.
)'s AE (exposure) calculation will be explained.

0 Calculate the reference value T□ of the shutter speed in order to sound the buzzer for camera shake warning.

A lens with a long focal length is likely to cause camera shake no matter how fast the shutter speed is, so the longer the focal length, the faster the TvH.

zFz=16Xiogzf150+56 (": Lens focal length (M)) TvM-1,25X (2F2 56)/16+5.8
75 For example f = 105 ms TV, I'i7.2
(SS '1143) f = 210 kaku T□ζ8.5
(53ζ353) In (53ζ353), TVH1 is obtained in the same way as in (5). This is to warn you if Tv becomes extremely slow even with a wide-angle lens.

zFz = 16 X logzf150 +56(f
: Lens focal length (mm)) TV, = 1.125 X (ZFZ-56)/16+ 5
．． 875 For example, f = 35mm TVH ("i5.
3 (SS!: 137) Even if the focal length f of the F=2.80 lens is short, the camera shake warning buzzer Bz will sound with an extremely slow shutter speed. Conversely, if the focal length f of the lens is long, the buzzer Bz will sound if the shutter speed is faster than a certain level. Restrict TVH to prevent it from ringing.

The shutter speed at the bending point of the OAE calculation diagram is calculated.

When the focal length f is less than 50 mm, there is less possibility of camera shake, so the aperture should be set to a narrow line.

When shooting at 1250mm, if the subject is close and appears large, change the line depending on the image magnification to assume a moving subject and use a line that increases the shutter speed.

When image magnification data cannot be used (Communication (III)
bt-0 of AEFLAG of the input data at the time), and Tvf at the bending point is uniformly set to Tvf = 10. When usable (b,=1), β>1150 Tvr=11 1/100≦β<1150 Tvr=t.

β<1/100 T, f=9 shall be.

When the spot key is turned on (AEL・1),
The brightness of the spot (BVc) - BV, the brightness of the spot - is the exposure value f! Vs, and when the spot key is OFF, the exposure value EVS is calculated from (AEL=O) brightness (BVs) ---main subject brightness.

And maximum aperture value (AV+nax) + minimum (AVm
in orAVo), maximum shutter speed (TVma
x) EVs obtained above from r minimum (TVmin) exceeds the control limit (AVmax + TVmax or A
Vo + TVmin), the above limit value is set and the process proceeds to camera shake determination.

At the above limit value, shutter speed when AV = AVo, TV = EVs - AVo, TVc = T
V, AVc = AV.

Then, proceed to camera shake determination, but if the TV is below the bending point (TV, ') of the program diagram, and this TV exceeds the bending point (TVF), the slope of the AE calculation is changed according to the focal length of the [F] lens.

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

If the focal length is short, consider the depiction and set the aperture to a narrow line.

The program line mentioned above f÷ 38 stop F=2.8 f = 105s F = 4.5 f = 210mm F = 4 Figure 37 shows what is written about the three lenses.

Here, each of the three lines f = 105 mm and f = 210 mm is β<1/100.1150<β from the top.
≦1/100, β≦1150.

When the aperture value AV obtained in this way exceeds AVmax, the shutter speed TV is calculated as AVc + AV + aax.
cII EVs −AVmaxz. Calculated aperture value A
When V does not exceed AVmax, TV = [! Vs
- It is determined whether or not the TV obtained by AV exceeds TVmax, and if it does not, AVc = AV, T
Let Vc = TV, and let Vc = TV
max, AVc = EVs - TVmax to II? Recalculate the wholesale aperture value AVc.

[F] When camera shake occurs, communication (I
I) signal (S ll-1-bt) is set to 1, and this signal (S n-1-bt) is set to O when the hand is not shaking.

Then, bit (b) of the communication (IV) signal CTRLH.

) is set to O to prohibit flash emission.

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, the group MP of data (GOlGI, G2) is
,,MP1. MPl. If a group is required, the above-mentioned MP1, MP3. It is sufficient to memorize the start address and number of MPtos and read them in response to a signal. These are compatible with existing card systems because they only read fixed data. However, if a new card with other functions is created and, for example, the other data MPz and MP are required, the other data cannot 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, the data (for example, M
It is not possible to specify only the data of Pz and the data of MP, and all the data from MP to MP is specified, resulting in wasted data transfer (memory and time). .

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 (Sleeve) M4 Surface 9 Dob (■) Table 7 Table 1 (Continued) Table Lens (I) Table (Continued) Table Lens (I [) Table 12 Sports card Table 11 Camera lens information In the above embodiment, the exposure calculation for the sports card in which the bending point of the exposure program diagram according to the gist of the present invention is determined by the shooting magnification β is as follows. It is shown in Figure 36.

Effects of the Invention According to the present invention, even when a moving subject appears large on the film surface, image blur is less likely to occur and good photographs can be obtained.

In this case, if an exposure program diagram determining means is provided in the accessory and the exposure program diagram determining means is configured to operate when the accessory is attached to the camera body, it is possible to install the exposure program diagram determining means in the accessory. By providing some of the functions, the burden on the camera body is correspondingly reduced. When this accessory is configured with an IC card, the accessory becomes small and lightweight, which is 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 0)) 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. FIG. 7 is a flowchart showing a routine for determining the AF mode and locking the focus. 8th
Figure (a) is a circuit diagram of an electronic flash device, and is shown in Figure 8 (0)).
are explanatory diagrams regarding the display, Fig. 8(C) and Fig. 8(
d) 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. 111ffl(a) is a flowchart of flash data input, and FIG. 11rb) is a flowchart of flash data output. Fig. 12(a) is a flowchart of AF, Fig. 12 et al.)
. Fig. 12(C), Fig. 12(6), Fig. 12(e), Fig. 12(f), Fig. 12(b) are flowcharts related to this. Fig. 13 is 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. 17 is a flowchart for selecting a function mode, FIG. 18 is a flowchart for exposure compensation, FIG. 19 is a flowchart for self-processing, FIG. 20 is a flowchart for creating photometric data, and FIG. 21 is a flowchart for AE flash. 22(a) and 22(b) are flowcharts of aperture and shutter speed settings. FIG. 23 is a flowchart of exposure calculation. (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 flowchart showing the display routine, FIG. 29(Q)) is a flowchart showing the interrupt routine, FIG. 29(C), FIG. 29(d) and FIG. 29(e) ) is a diagram showing a display example, and Figure 29 (f
) is a flowchart showing a mode setting routine. FIG. 30 is a flowchart of exposure control, FIG. 30(C) is a flowchart of lens drive,
FIG. 0(d) is a flowchart of shutter speed control. Figures 31(a) and 31(b) show one part of the film.
FIG. 32 is a flowchart showing an interrupt routine related to closing the camera back. FIG. 33, FIG. 34, FIG. 35, and FIG. 36 are diagrams showing the operation flow of the sports card, FIG. 37 is a diagram regarding the exposure setting, and FIG. 38 is a diagram showing a display example.

Claims (4)

[Claims] (1) Photographic magnification detection means for detecting photographic magnification β, photometry means for measuring subject brightness, and aperture value Avc and shutter speed T for exposure control based on the photometry value of the photometry means.
an exposure program diagram determining means for determining vc;
The exposure program diagram determining means includes a portion where the aperture value Avc is equal to the open aperture value Avo and the shutter speed Tvc changes with a change in the exposure value Evs, and a portion where the shutter speed Tvc changes with a change in the exposure value Evs and a portion where the shutter speed Tvc changes with a change in the exposure value Evs. At least aperture value Av
A camera system characterized in that a bending point on an exposure program line where the portion where c changes intersects is determined according to the imaging magnification β. (2) The exposure program diagram determining means determines that A within the range of Evs≦w, where W is a variable that depends on the photographing magnification β.
Let vc=Avo, Tvc=Evs−Avc, and Evs>
The camera system according to claim 1, wherein in W, Avc>Avo and Tvc=Evs-Avc. (3) The exposure program diagram determining means is provided in an accessory that is detachable from the camera body, and the exposure program diagram determining means operates with the accessory attached to the camera body. A camera system according to claim 1. (4) The camera system according to claim 3, wherein the accessory is an IC card.