JPH02118537A - Camera system - Google Patents

Abstract

PURPOSE:To facilitate focusing by using an accessory with a close-up photographing function and setting the switching circuit of a camera main body on a spot area side in response to a generated signal. CONSTITUTION:An IC card which is mounted on an IC card CD camera main body as an accessory has a means which changes a distance measurement area forcible into the spot area in close-up photographic mode. The microcomputer (microcomputer muC2) of the card CD generates and sends a multi-point/ switching signal to the receiving circuit of the camera main body. When a battery is loaded in the camera main body, the microcomputer (microcomputer muC) of the camera main body operates respective circuits according to the card IC. Then a receiving circuit outputs a signal indicating the spot area as a switching signal and a switching circuit switches the distance measurement area to the spot area forcibly. Thus, the spot area is selected without fail, so the lens is easily put in focus of even a moving subject.

Description

DETAILED DESCRIPTION OF THE INVENTION - Part 1 - The present invention relates to a camera system, and more particularly to a camera system having a close-up photographing function.

Some cameras are designed to allow close-up photography. On the other hand, in AF (autofocus), a distance measurement area is defined, and there are some systems in which a multi-point area or a spot area can be selected and used as the distance measurement area.

However, when shooting close-ups, the image magnification is large, so even the slightest movement of the subject can cause the subject to go out of focus. 8) It is difficult to focus and the lens may cause hunting.

It is an object of the present invention to provide a novel camera system that solves the above-mentioned problems during close-up photography.

In order to achieve the above-mentioned object, the present invention provides a camera system in which the distance measurement area for autofocus can be switched between a spot area and a multi-point area. The structure has a means for making the spot area specific.

Further, the camera system of the present invention includes a camera body and an accessory that is detachably attached to the camera body, and the camera body has a switching circuit that switches a distance measurement area for autofocus between a spot area and a multi-point area. and a receiving circuit that receives a multi-point/spot switching signal from the accessory and outputs a switching signal to the switching circuit, and has a function of controlling close-up photography for the camera body. The accessory may be configured to output a signal indicating a spot area as the multi-point/spot switching signal.

Knee Pressure - According to the configuration of the present invention, in the close-up shooting mode, the spot area is always selected, so even if the subject moves, it is easy to focus, and lens hunting does not occur.

In addition, when using an accessory with a close-up shooting control function, this accessory generates a signal that indicates the spot area, so the switching circuit on the camera body side is automatically set to the spot area side by this signal. will be done.

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

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

([,D,) is an auxiliary light emitting element that emits light toward the subject to enable focus detection when the intensity is low and focus cannot be detected.

(LM) is a photometering circuit that performs photometry for five areas (described later), converts the photometric values from A/D to microcontroller (μ
C) as luminance information. (DI8PC) is a display control circuit that inputs display data and display control signals from a microcomputer (μC) and causes a display section (DISPI) on the top surface of the camera body and a display section (DISPI) in the viewfinder to perform a predetermined display.

In this embodiment, the IC card (CO) 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), (A
(Vcr) is an aperture control circuit that controls the aperture based on the control signal from the microcomputer (μC), and (MD) is the film winding circuit 9 that controls the aperture based on the control signal from the microcomputer (μC).
This is a motor control circuit that controls rewinding. (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 to stabilize the voltage (VDD) supplied to the microcontroller, (D+) ~ (
D4) is a group of diodes that provides a voltage lower than the voltage (VDD) to the microcontroller when the DC/DC converter is OFF to reduce power consumption.The hardware of the camera microcontroller (μC) operates at this low voltage. Because it can operate,
An interrupt occurs, but the microcomputer (μC2) on the IC card (CD) cannot be driven at this low voltage. (RR)
(C11) 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 becomes 01717 when a battery is installed, and when a battery is installed, the switch (SIIE) turns OFF.
When it reaches F, a signal that changes from "L" level to r) (J level is applied to the terminal (RE) of the microcomputer (μC), and the microcomputer (μC) executes the reset routine described later. (3i: n) is a normally open button type exposure mode change switch, and the operation of this switch (SεII) and the up switch (Sup) and down switch (described later)
The exposure mode is changed by the operation of Sdn). (
SFUN) is a normally open button-type function change switch.
A function change (for example, switching between continuous shooting and single shooting) is performed by operating this switch, an up switch (Sup), and a 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).

(ScDs) is a card data setting switch that is operated when transitioning to data settings when a card is installed. (Sl) is a card data setting switch that is operated to perform preparatory operations necessary for shooting such as photometry and AP operation. The switch is turned on by the first stroke of a release button (not shown). The above switch (SE
M), (SFUN), (SCD), (SCDS),
If any one of (81) is operated and turned ON, an [INT+] interrupt, which will be described later, is executed. (SN
) is a main switch for enabling the camera to operate, and by turning this switch ON or OFF, an interrupt (CINTO), which will be described later, is executed.

(Snup) is ONL when the mirror up is completed, the shutter mechanism is charged, and when the mirror is down, it is ONL.
This is a switch that becomes F.

(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. (S-D) is a one-frame switch that is turned ON when one frame of film is wound. (S-EL) 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.

(Ssp) is a normally open change data selection switch for selecting data to be changed. (SSELF) 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 (SSELF). 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
Lll) 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. (SJIC) is a back cover closure detection switch that turns on when the back cover is closed and turns off when it is opened.
C) executes an interrupt routine to be described later. (SRi
d) is a switch for starting film rewinding, which is turned ON when operated, executes an interrupt routine to be described later, and turned OFF when the back cover is opened. (SCR) is IC
This is an IC card installation switch that turns OFF when a card (CD) is installed, and when turned OFF, resets the microcomputer (μC2) of the IC card (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 of 0. When changing the aperture value in M mode, use the aperture change switch (SOU)
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 IF20) and (IF5.) each reach the "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.

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

First, the functions of this IC card can be selected by (i) selecting the exposure mode, (ii) choosing between two functions, (i)
ii) There is a relationship due to the operation of the lens side switch, 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 (a).
Among the four mode displays (represented by P in the old PROGRA), 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. Mode display [Figure 2 (C
) (A mode selection)] is performed. characters (or numbers)
The dots around 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 up the rCuS 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-24 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 (I) above, modes (i) to (III) are sequentially selected by turning on the card key once when setting the mode, and pressing the up switch or down switch selects that mode. The function (setting value) inside is selected. Modes (i) to (III) and functions can be set cyclically, respectively.

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

(10) Function card; (3-1) H/8 card ((highlight/shadow) card) This card makes white objects whiter and black objects darker, and changes the exposure value obtained by the camera. Over a certain value (+
2.0) (highlight) and under (-2,0) (shadow), and this is done by inserting this card (one of the HI3 selections) and operating 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 The data can be stored in memory, and these data can be viewed using the liquid crystal 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 (SR5
) turns OFF, and a signal that changes from r L J level to rHJ level is input to the terminal (RE), turning on the DC/DC converter. PWO = r HJ ), the built-in clock starts oscillating, and the terminal (φ) A clock is also sent from the microcomputer (μC) to the IC card (CD) via the microcomputer (μC). In addition, in the case of an interrupt, turn on the DC/DC converter.
, and the starting of the clock is done automatically by hard circuitry. Next, the microcomputer (μC) is shown in Figure 3 (RESR
Execute routine T).

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 ($1115), the number of films stored in the E2 PROM (N+) and the film sensitivity (S
v) is read and transferred to a predetermined RA. Thereafter, it is determined whether the main switch (SM) is in the ON state (#120). If the main switch is in the OFF state, (IPe='HJ), step (#1
Proceed to step 25), turn off the power supply transistor (Try),
F(PW=rLJ'), and data communication (VI) of serial data with the card is performed.

Here, 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, C3cIll
= "H"), 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) 2
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
3CD) to “H” and request communication (11270)
. Next, set data indicating data communication (■■), set the camera on the output side, and perform data communication of data indicating communication (Vl) (#272.~
11277). 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 (
#285) After inputting the data, the terminal (C8CD) is set to r L J to indicate the end of communication (#286). From the data input in this way, the camera's microcontroller (μ
C) is in a state where it is okay to go to sleep (stop).This is because the camera's microcontroller (μC) sends the lock and voltage (VDD) necessary for the operation of the IC card to the IC card (CD). Therefore, if these clocks and voltages are not sent during the operation of the IC card (because the clock stops and the voltage drops when the camera goes to sleep), the IC card's microcontroller (μC2) This is to prevent signal processing (control of writing to the E2FROM) from being executed.

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

Next, an explanation will be given of an interrupt [INT2] caused by turning the main switch (Sl) ON or OFF.

First, it is determined in step (#147) whether the interrupt is due to the ON of the switch (SJ), and if the interrupt is not due to the ON (IPa = "HJ"), the interrupt of (: INTO) is prohibited (71240), and the display data is (At this time, all lights are displayed) should be set #245), step (#2
At step 50), data communication is performed with the display microcomputer of the display control circuit (DISPC), and the process proceeds to step (#125), where the same processing as described above is performed.

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

On the other hand, at step (#147) the main switch (SR) is
is ON, in step (#150)
TO) interrupt is permitted, display data is set (standby display) in the next step (#155), and data is exchanged with the display microcomputer in step (#160). Through this data communication, the display microcomputer performs the display shown in FIG. 2(f). 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 “L” level (switch SEMI 5FIJNI)?
(One of Scn, 5cas, and Sr is ON)
It is determined in step (#170) whether or not the signal is at "L" level, and if it is not at the "L" level, the process proceeds to step (#125), where the sleeve is controlled as described above. If the level is "L", proceed to step (#180) and set a flag (
OPF) and executes the [:S, 083 subroutine described later (#190). Next, another terminal (IF
5) is at the “L” level (#200
). If it is rLJ level, the card request signal (DSPREQ) is set to 0 in step (#203), and then the process proceeds to step (#180).
Repeat step 90). If it is not at the r L J level (that is, if none of the above five switches are operated), proceed to step (#205), determine whether the power hold flag (OFF) is set, If it is set, reset and start the power hold timer in step (#215), and then proceed to the next step (#220).
to reset the flag (OFF) and proceed to step (#235
). Even when the power supply holding flag (OPF) is not set, the process proceeds to step (li235), and it is determined whether there is a signal requesting repeating the 5M0N loop from the IC card (CD), and if there is, Step (#
Return to 190). This happens when the display by the display microcomputer is controlled based on data from the IC card, such as during data setting, and even though the user wants to see the display, the camera's power supply is turned off for 5 seconds. This is done to prevent the display from automatically changing to standby when the hold is terminated, making the display inconvenient for use. If there is no repeat request, the process proceeds to step (#237) and it is determined whether or not the timer has elapsed for 5 seconds.

If the elapsed time has elapsed, the process advances to step (11150) and the standby display is changed to sleeve control, whereas if the elapsed time has not elapsed, the flow from (Sr ONE) in step (#190) 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 of CSr) for controlling photometry, AF, and display will be explained with reference to FIG.

First, the interrupt C INT+ ] for this flow is prohibited (#40. This is because if the interrupt C INT+ shown in FIG. 3 is inserted during the main control, the control operation will not proceed further. Next, (#405) the microcontroller (μ
Set the terminal (PW) of C) to “H” level and turn on the inverter (
PNP transistor (Try) via INI)
The transistor (Try) is turned on by applying a low level to the base of the photometry circuit (LM), A,
Supplies power to the F circuit (AFct), etc. Next, input information specific to the interchangeable lens from the lens circuit (LE) (#
410). This is shown in FIG. 10 and explained. First, the terminal (C3LE) is set to the rHJ level, and serial communication is performed as many times as necessary in #60 to input information from the lens (#605). FIG. 4(a) shows the circuit inside the lens and will explain it. A decoder (2) counts the clock input from the camera and creates an address signal. At this time, when the predetermined address is reached, the lens data changes due to zooming, so the focal length is detected by the encoder (3) that detects the focal length, and the address is changed by the address circuit (5) according to the focal length. hand,
Output specified data to the camera body.

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

Next, lens information will be explained. As shown in Table 11, the lens information sent to the camera body includes the lens attachment signal, the lens'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, the above lens side switch (SJ ON, OFF,
Indicates whether or not to drive the lens (LOK)
etc., and is input to the RAM at the address in the body shown in the table. This signal (LOK) changes from "1" to "0" in response to a situation in which AF cannot be performed. The camera body receives this signal and stops the motor.

On the other hand, on the lens (10) side, there is a ROM as shown in Table 9.
and address structure. (A) and (B) are the same ROM but differ only in the So amount relationship and the LOK relationship.
It stores two similar data in memory. Conventionally, lens information has been relatively small, and a plurality of types of lens information with the same function can be stored in one ROM, and the lens information can be switched depending on the lens used. In this case, the amount of information per lens is fixed.) The required ROM must be determined accordingly. In such a case, creating (increasing) new data indicating that the switch is ON or OFF requires two additional steps when data is changed by changing the address in the ROM according to the ON or OFF state of the switch. This means that a byte (ON, 0FF) is required. If there is room in the ROM, the 10th
As shown in the table, two bytes 06n and 08N can be added, and the address can be changed to select 06H and 08H depending on whether the lens side switch (SO) is OFF or ON. However, when there is no such luxury,
As shown in Table 9, ROM [
In this embodiment, it is possible to do this by setting (B) to the same data except for the data changed by turning the switch ON or OFF, and selecting (A) or CB) depending on whether the switch is OFF or ON. However, in this case, the types of lenses that can be used with this ROM are reduced. For the lenses in Table 9, the lens side switch (So) is OFF.
In the case of , either 06H, 07+, or 08H will be sent, and conversely, if it is ON, 16H and 17H (bo=0.AF motor stopped) will be sent. In addition, in the address (XXX
) indicates address data that changes depending on the amount of extension of the zoom or focusing lens, and is input from encoders (3) and (4).

The signal (LOK) in the lens indicates that the lens is not for focus detection. Upon receiving this signal, the camera body side prohibits AF operation (lens drive) and performs only focus detection operation.

For example, when a zoom lens with tuna is set to macro mode, AF operation is prohibited and address 071. (1st
0 table), 08) + (Table 9), address 09H (Table 10), 07 to enable AF operation when not in macro mode.
Data of H (Table 9) 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, the latter two of the changes in functions due to the IC card - selection of focus lock, continuous, and spot AF - cannot be made because the C card is not an old camera, 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, 07□, 08. , and the switch (So) is OFF
When it is F, it is A in Table 9, and 06e and 07 in Table 10.
)1. 09H may be changed respectively.

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 [LJ level and return (#610).

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

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

The contents are shown in the Ca2O3 table (see the first communication column). Data communication (1) is shown in FIG. 5(a). The communication method is the fifth [3fl(f) data communication (V
Almost the same as I), the difference is that data is communicated (
I) The data indicating that the data is set 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.

(Dl) is a reverse charge prevention capacitor, (C+) is a large capacity backup capacitor, (μC3) is a microcomputer that performs sequence control, and (TM) is the pulse width that indicates the type of serial communication from the camera body. This is a detection circuit that detects and outputs a signal indicating the type of communication to the microcomputer (μC3). (D/D) is a booster circuit that converts a low voltage to a high voltage, and starts and stops boosting based on a signal from a microcomputer (μCa). (D2) is a rectifier diode, (CM) is a main capacitor that stores energy from the booster circuit, (LEC) is a light emission control circuit that controls light emission, and (DISP) is a display circuit.
As shown in (b), 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.

(SN) is a normally open bushing switch that turns the power ON and OFF.When the power is ON, it is turned OFF, and when the power is OFF, it is turned ON. (MQNT) is a circuit that monitors the amount of light emitted.
When the amount of light emitted is reached, rH,,1 signal is output. (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 (sh) is operated, the microcomputer (
A signal that changes from "H" (the terminal is pulled up internally) to "L" is input to the microcontroller (μC3).
) has an interrupt, and the microcontroller (μC3) is as shown in Figure 8 (
Execute the flowchart shown in C). In this flowchart, first, a flag (ON
F) is set or not (#ST1. If set (ONF=1), the terminal (OP2) is set to r'f in order to reset this flag and stop boosting.
= J level, turn off the ON display and sleeve (
#5T20 to #5T40). When the above flag (ONF) is not set, the operation is performed by turning the power OFF to ON, and the flag (ONF) is set, and the terminal (OP2) is
Start boosting the voltage at the “H” level (#5T50
．． #5T60). Then, it displays ON (#5T7
0). Next, reset the timer and start #5T80
), wait for 5 minutes to pass (#5T90), and when 5 minutes have passed (#5T20) i: Advance power supply. Performs the same control as FF and goes to sleep.

Next, FIG. 8(d) shows and describes the interrupt processing CINT+) which is performed when a data communication request is received from the camera to send data from the electronic flash device to the camera. First, from the camera, the pulse width ('r+) r )(
” signal is delayed, the detection circuit (TM) detects this time (T1), and the microcomputer (μC3) (INT+
) outputs a signal that changes from "L" to rHJ level to the terminal. The microcomputer (μC3) inputs this change signal and processes the CINT+) interrupt.

Note that the terminal (φ1) is always working when the battery is installed, and the microcontroller (μC3) is connected via this terminal (φ,).
A clock is sent from the timer detection circuit (TM) to the timer detection circuit (TM).

The microcomputer (μC,) first resets the timer by setting the terminal (op+) to the rH level, then setting all the outputs of the timer to the "L" level, and responding to any signal input to the timer. (#5T110). Then, it is determined in step (#5T120) whether or not the flag (ONF) indicating power ON is set, and if it is set, the data communication bit (STS+) is set to rlJ. In order to start the process, in step (#5T140) the terminal (OP2) is set to "H" level and the process proceeds to step (#5T180). On the other hand, if it is not set, the above bit (STS, ) is reset and the process proceeds to step (#5T180) (#5T15).

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, the guide number restriction switch (r, o) is set to O.
Determine whether or not it is turned on, and if it is turned on (I
P = “L”) Determine whether the flag (LoLMTF) indicating this restriction is set (#5T181.1
sT182). When set, reset this and set the terminal (opa) 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. #5T184)
.

If the flag (LoLMTF) is not set, set it, set the terminal (OF2) to "H" level to permit light emission limitation, and set communication data (STS3) (#5T186. to #5T187). ). switch(
r, o) is not turned on, step (#5T
190).

Note that this step (#5T190) requires step (#5T190).
T184) and C#5T187).

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

The signal of the above bit (STS+) and the electronic flash device (ST
) (#5T200), wait for the data communication clock (SCK) to be sent from the camera body, and wait for the data communication clock (SCK) to be sent from the camera body. Then, in synchronization with this, communication is controlled to output data through the terminal (S0ut) and the input/output switching circuit (IloCG) (#5T21).

After completing this, set the terminal (OPl) to “L” level (
#8T220), the above timer is reset so that 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 (engine p+),
The process advances from step (#5T230) to (#5T240).

In step (#5T240), the terminal (OPI) is set to rHJ 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, the camera data sent from the camera in synchronization with the communication clock (SCK) is input to the terminal (S+s) through the input/output circuit (IloCC), and is input to the predetermined register (
RAM) (#5T260. #5T270)
. Then, the terminal (OPl) is set to "L" level to enable reception of pulses from the camera (#5T28
of. Input data includes whether or not to emit light and forced power supply O.
Input the presence/absence of FF, the presence/absence of forced ON of the power supply, and the presence/absence of light emission restriction release.

In step (#5T290), it is determined based on the input data whether or not the power is forcibly turned on. If it is not forced ON, proceed to #5T330. On the other hand, when indicating forced ON, a flag (ONF) indicating power ON is set and the terminal (
Set OF2) to r)(J level, start boosting, display ON, and proceed to step (#8T330) (#5
T300~#5T320).

In step (#5T330), it is determined based on data from the camera whether or not the power is to be forcibly turned off. Forced OF
When F, the microcomputer (μC3) turns off the ON display, resets the flag (ONF) indicating power OFF, sets the terminal (OF2) to "L" level, stops boosting, and goes to sleep (#5T420 to 1lsT440 ). On the other hand, if it is not forced OFF, proceed to step (#5T340),
The timer is reset and started, and it is determined whether 5 minutes have elapsed (#5T350). When 5 minutes have elapsed, the process advances to step (#5T420) and the same control as for forced OFF is performed. If 5 minutes have not elapsed, it is determined whether exposure control has been entered (#5T360), and if exposure control has not been entered, the process returns to step (#5T350) and step (#5T360) is determined.
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 ST+). The detection circuit (TM) detects this and connects the terminal (E
C) to "H" level. When this signal is input,
The microcontroller (μC3) resets and starts the timer (#5T370) and checks the presence/absence of the light emission sent from the camera.
When light is emitted based on the signal indicating no signal, the terminal (OF
2) to r) (J level (llsT400), and when no light is emitted, set the terminal (OF2) to "L" level and proceed to step (#5T412).This step (#5
T412) waits for the time (= 150 m5ec) from turning on the switch (S2) until the shutter's front curtain completes travel + α (emission time of the electronic flash device), and then connects the terminal (OPI).
) to "L"(#5T415), so that even if an interrupt pulse from the camera comes in, it can be processed.
Proceed to switch (#5T80) in figure (C).

In the circuit shown in FIG. 8(a), the AND circuit (AND+) is designed to operate only during the exposure control operation and to receive the dimming completion signal. AND circuit (AN
D2) determines whether or not to permit the light emission signal sent from the camera. Based on the signal from the camera, the microcontroller (μC3) sets the terminal (OF2) to rl (J/“L”).
Make it.

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

The signal (C8ST) indicating the type of data communication to the electronic flash device (ST) (the pulse width changes depending on the type), the clock at the time of communication (SCK), and the signal indicating completion of dimming are OR circuits (OR2+). It is supplied to the electronic flash device (ST) through. When the first curtain of the shutter completes travel, the X contact (X) turns ON (this is the charging operation during winding)
(FF), and 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 according to the signal from the I/QC).

In FIG. 11(a), the camera's microcomputer (μC) outputs a pulse with a fixed time (tl) width to the terminal (C8FL) in order to communicate data with the electronic flash device (input on the camera side). Set the QC terminal to "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 (#65
0 to #655).

Return to Figure 6 and step the AF mode (71417)
Determine. A subroutine for determining the AF mode is shown in FIG. 7(a). First, it is determined from the lens information whether the above-mentioned lens side switch (So) is turned on (#4000). When this switch is turned on, the power retention time is reset and started (10
seconds), step (#4005) flag (OF
F) and determine whether the card function is ON or OFF based on the 0N10FF signal of the card function input through data communication (■) (described later) (#4007).
.

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

On the other hand, if the card function is ON, it is determined whether or not it is a custom card, and if it is not a custom card, the 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)
AFffilJ# is performed based on the AF information set in the card input from the card.

The control is the same when determining the AP mode using the E2FROM in the camera, and when determining the AF mode using the E2PROM in the custom card, only the data used is different, so the explanation will be based on determining the AF mode using the E2PROM inside the camera. 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, if the focus lock mode is selected, switch (So
), set the focus lock bit (Fb-z), reset the auxiliary light mode bit (Fb+3), and if the tracking mode display is on, reset the flag (tracking F) to turn it off. (#4
020~#4030).

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 AF mode is spot AP (
114035). This step (#4035) also comes when the focus lock mode is not set in the above step (#4010). If it is Spot AF, it is determined in step (#4036) whether or not 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 in order to memorize the multi-point/spot mode before the switch (SQ) is turned on, the contents of the bit (Fb2) are written to the bit (Fbr5), and the above flag ( Reset SQONF) #4038), set spot mode in step (#4040) Fb2=1), step (#4045)
). If the flag (SQONF) is set, the process skips step (#4037) and proceeds to step (#4045). Step (#4045)
Then, it is determined whether it is continuous AF or not, and if it is continuous AF, a bit indicating this (Fbs
- Set 1) in #4050), reset the bit (Fb13) indicating the auxiliary light in step (#4055), and return. It is now assumed that the auxiliary light mode for the continuous AP 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 (So) is on, only one of focus lock, spot AP, and continuous AF is set on the IC card, so for example, step (#40
If the focus is locked in step 10), step (
#4035) and (#4045) are both NO.

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

) is OFF, the process advances to step (#4060). In this step (#4080), the bit (Fb+*) indicating the focus lock function is reset.

Spot AF is selected by the switch (So), and it is determined whether or not the control is to be performed immediately after the switch (So) is turned off based on whether or not a flag (SQONF) is set (#4065). If set, the bit (
By transferring the contents of bit (b2) to bit (b2), multiple points/spots before being selected by spot AF by switch (SQ) can be obtained (#4070). Then, reset the flag (SQONF) and step (#4087)
Proceed to. In step (#4065), the flag (SQ
ONF) is not set, it is determined whether it is forced spot AF using an IC card (close-up card), and if it is forced spot AF, the bit (Fb2) is set to indicate spot AF and step (#4087 ). If it is not forced spot AF, step (#408
Skip 5) and proceed to step ($14087).

Next, in step (#4087), it is determined whether or not it is forced continuous AF based on the signal input from the card (sports card), and when it is forced continuous AF, a bit (Fba) indicating this is determined. Set the bit (Fb+3) to disable the auxiliary light mode and return (#4088, #4089
). One shot A when not forced continuous
Reset bit (Fbs) to indicate P (#4090
) and return.

After determining the AF mode described above, the microcomputer (μC) performs card data communication (n) with the IC card (CD) in order to determine the type of the IC card (CD) (114).
20).

This card data communication (n) will be explained with reference to FIG. 5(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 10 times 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, 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 (TV). In particular, the 9th byte is for communication (■)
, the 10th byte indicates communication (■), and this is called a "group designation type". These two specification methods are specified in the 3rd byte bit (b6) of the 4 bytes above.
By switching between cards and transmitting only the necessary data, the system efficiently saves time. Then, returning to FIG. 6, it is determined whether the AF prohibition data input in communication (II) is set or not (#425). , to determine whether the F start switch (S+) is turned on or not based on the indicator of the terminal (IPs) (#427). The above switch (
S+) is turned on (IPs-' L J level), AF is controlled (#429) and the switch (Sl
) to set the flag (81ONF) indicating ON (#
430).

A based on the data entered from the card in communication (II)
When the F prohibition data is set, or when self-timekeeping is in progress, or when the switch (Sl) is set to 0FF (I
Ps = r HJ level), output a signal to stop the AF drive motor to the lens control circuit (LECN) to stop the lens drive in order to prohibit AF operation #4
31), flag indicating that AF is not being performed (AFN
F) should be set #435), and the switch (Sl
) Reset the flag (S+0NF) indicating ON of (
#437). When the data setting mode is set in this way, by disabling AF sub-control and giving priority to data setting in the card example, it is possible to prevent AF from being erroneously set during data setting.
Even if the start switch (S+) is pressed, the AF operation is not performed. When the flag (AFNF) is set, the signal (AEFLAG b+) indicating that image magnification data cannot be used is set to "O" and output to the card during data communication (III).

Here, regarding the above-mentioned AF sub-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, (LM+) 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. Hereinafter, (AFL) is the first island.

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

To explain the AF sub-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 whether it is set or not. If not, the flag indicating focus (AFEF), the flag indicating low contrast scan inhibition (LSII (F)), and the flag indicating the beginning of low contrast scan (LSFI) are reset (#702), assuming that it is pressed for the first time. . #703. #704), proceed to step (#705).

Note that the low contrast scan and these flags will be described later. When set, step (#702
) *Direct step without passing (#705) ~ (#
704). 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)
is selected by the card or not (11
707). If it is forced AF mode, step (#711
). On the other hand, when it is not forced AF mode, you can check whether the focus adjustment mode is AF mode/M mode using the terminal (IP
+o) level #710), and when the AF mode is selected, check whether the focus log mode is selected in step (#711) by checking the pitch (Fb+4
). When in M mode, step (
#798) to disable the auxiliary light mode (Fb13=0)
, After executing the manual focus subroutine (MFOCtlS) in the next step (#799), set the flag (AFNF) indicating that AF is not being performed (#800), and determine whether or not focus is achieved (#780). ), if in focus, set the flag (AFEF) #781),
If not in focus, reset (#782) and return.

This manual focus subroutine is shown in Figure 12 (
As shown and explained in d), first, a flag (MFF) indicating manual focus is set, and integration control is performed to control integration and execute data dump. Then, in manual focus, a flag (AF2F) indicating the second island among the three islands in the AF area is set, the day focus amount (DE12) of this island is calculated, this is set as the day focus amount, and the process returns (
$14100-114110).

The integral control subroutine in the above step (#4101) is shown in FIG. 12(b) and will be explained first. , the process proceeds to step (#4163) without emitting the auxiliary light (#4150.
．． #4155). When focus detection is not 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.
) (Go to J level and proceed to step (#4163) (
114150~#4160).

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

Next, perform integration and count again after the integration is complete (CT)
Read and set this as (CT2) (#4165.
#4167). The average of (c'r+) and (CT2) is calculated, data is input (dumped) as (CTI 2 ), and the process returns. ($14168, #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 (So), the lens drive is stopped in step (#712) 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 it is not set, step ($1799
).

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.

In step (#710) of FIG. 12(a), it is determined that the AI is 7, and in the next step (#711), when the focus is not locked (Fb+a=O), in step (#7
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 CCD for distance measurement, and after the integration is completed, the integrated value is converted into digital data and the obtained data is input (#720 ). Then step (#73
0) to detect whether it is spot AF or not (function data Fb2
If it is spot AF (Fb2=1), the process advances to step (#735) and executes the spot AF subroutine shown in FIG. 12(d). In this subroutine, a flag (AF2F) indicating that AF is being performed is set based on the second island, the day focus amount (DF2) of the second island is calculated from the input data, and this is used for driving the lens. Set as day focus amount (
$14102~#4110).

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

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

In FIG. 12(f), the microcomputer (μC) first resets the flag indicating the island (AFIF - AF3F), detects the largest day focus island, and converts the detected island day focus amount into the lens driving day focus amount. , set the above-mentioned flag (AFIF - AF3F) according to the island and return (
#810 to #885).

After calculating the day focus amount, it is checked in step (9745) of FIG. (For example, focus detection is disabled) If focus detection is not possible, the process proceeds to step (11747) to determine whether or not the mode is auxiliary light mode. If it is in auxiliary light mode, no further focus detection is performed. Since this is wasteful, a flag (LCONF) indicating this is set (#752), a flag indicating the follow-up mode (described later) is reset (#755), and the process returns. In step (11747), if the auxiliary light mode is not selected, proceed to step (#757) to detect whether the brightness is low or not. If the brightness is not low, it is useless to emit the auxiliary light, so low contrast scan control. Low contrast scanning refers to performing focus detection while driving the lens to search for a focus detectable area when focus cannot be detected.

This is shown and explained in Fig. 12 (h). It is determined whether the flag (LSII (F)) indicating that a focus detectable area was not obtained even though low contrast scanning was performed is set ( #4400). When set, it is useless to perform low contrast scan any more, so return. When not set, determine whether or not a signal indicating low contrast scan prohibition is input from the card ( #4405). If it is input, return without performing low contrast scan. If it is not input, a flag indicating that this flow has been executed (
LSFI) is set or not.
410), if it is not set, set it #4415), set the flag (FWF) indicating the feeding direction ($14420), and set the lens drive amount n to a positive value greater than the maximum lens feeding amount. (K University) (#
4425), the lens is driven to extend.

When the flag (LSFI) is set, it is determined whether the lens has reached the extreme end of extension or the extreme end of extension ($14430), 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 next time set the lens drive amount to -(K large) to control the renormalization (#4445).
4450), 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
) (114455) and return. Then proceed to (#752), proceed to step (#752),
Perform the same processing as above.

On the other hand, if the brightness is low in step (#757) of FIG. ) to prohibit AF using the auxiliary light, and if it is not in the prohibition mode, proceed to step (#
760), the auxiliary light mode (FbI3=1) is set, and the process proceeds to step (#755).

Next, if the microcomputer (μC) is not unable to detect the focus,
The flag (LCONF) should be reset (#762), and step (
#765), and if it is in focus, set the flag (AFEF) indicating the focus state (#767), set the flag (AFEIF), and proceed to step (1175).
Proceed to 5).

If the focus is not in step (#765), step (#765)
Step #775) executes a subroutine for lens drive control, and then returns. This subroutine is shown and explained in FIG.
8). If it is the follow mode, proceed to the switch (#4330). When the flag (tracking F) is not set, either one-shot AF (-once the lens is focused, further lens driving is stopped, and focus detection may also be stopped at this time) or continuous AF (after focusing It is determined from the data (Fbe) whether the lens follows the subject and drives the lens according to the determined day focus amount (#4250).

In the case of one-shot AF (Fba=0), check whether the flag (AFEF) indicating focus is set (1142
55), and if it is not set or continuous AF (Fbs=1), step (
#4330) and (#4335) to step (#4
The process proceeds to step 340), where the lens drive is controlled. Step (
In step (#4330), the flag (AFEF) indicating focus is reset, in step (#4335), the amount of lens drive is determined, and in step (#4340), the lens is driven, and the process returns. In addition, in the lens drive in this step (#4340), the lens drive circuit (LECN) performs the above drive amount (
This is done by driving the lens by a value corresponding to 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 the current time), and (DPI) is (D
F2) and proceeds to step (#4345). In step (#4345), the lens drive amount (N) is determined by multiplying the determined day focus amount by the value . Read the number of lens extension pulses at that time and set it as (CTa), ΔCT
3 Use CTI□ to find ΔCT as the amount of lens movement from the center of integration, subtract ΔCT from the above N to find the lens drive amount at the end of the 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 brought from an unfocused state is set (#4260).

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 (DFa) that store the day focus amount are reset, and the obtained day focus amount (DF) is stored in the same register (DPI) (#4270). Set variable (N) to O (#4275), above (AFEI
F) (#4280) and return. In step (#4260), after focusing (AFEF・1
), when performing focus detection from the second time onwards (AFEIF, 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 (DF,) are transferred to the register (DF2).
), store the obtained day focus amount (DF) in the register (D
PI)] Add 1 to the variable (N) and store this (N
) is 2 or more, that is, it is determined whether focus detection has been performed three times after focusing, and if it is less than 2, the process returns without driving the lens (#4285 to 114305).

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

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

Here, the display in the finder regarding focus detection will be explained based on the display in the finder shown in FIG. When it is set based on F), the green LED lights up, and otherwise (focus F=O), 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, indicates the spot AP,
When only the outer region (102b) is used, multi-point distance measurement is shown. (103) is displayed when the continuous AF mode or the tracking mode is indicated (following F:1), and is turned off when the continuous AF or tracking mode is not selected. r A F /Ml in (104) performs AF display when in AF mode (AFNF=0), and performs M display in other cases (AFNF=1). In addition, the AF switch (
When S+) is OFF (S+OFFZ0), 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 (11440).

This is illustrated and explained in FIG. 15. Based on the data input from the card, whether or not the display control mode (data setting) is in progress is determined from the data input in communication (II) #90
5) If the mode is display control mode from the card (during data setting), return. When not in the display control mode, it is determined whether a flag (SLP) indicating that time is being measured in self mode, which indicates that time is being measured in self mode, is set (#907). Returns when set. If it is not set, it is determined whether the exposure mode change switch (SEl, l) is ON or not (#910), and if it is ON, the process proceeds to this change subroutine (#915) and returns (details will be described later). ). If the switch (SEM) is not turned on, the process advances to step (#920) and it is determined whether the function change switch (SFLIN) is turned on. When this switch (SFIIN) 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 to P-+A-+SUM and then returns to P, and each time the down switch (Sdn) is turned on, the process progresses sequentially to P4-A4. Proceed as -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 (II)
Based on the 0FF signal, it is determined whether the card function is ON or not (#1000). If it is not ON, the camera enters control. If it is ON, it is determined whether the custom card is used or not (#1001), and if it is not a custom card, the forced P mode signal is input from the camera, but whether or not it is determined that there is no step (#1001).
#1002), and if the forced P mode is set, the P mode is set (#1003) and the process returns. If it is not the forced mode, in-camera control is entered to determine the AE mode among the settable AE modes stored in the E2PRO old memory in the camera. On the other hand, if it is a custom card, the data sent through data communication (rV) (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 E2PROM, card data), and the selection control is exactly the same, so the explanation will be based on the control performed using the data in the camera's E2PROM. only.

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) returns to step (#1055).
Proceed to.

When it is ON, the process advances to step (#1005) and the (Fbo) (Fbl) of the function data (Fbn) of the RAM is
) to determine whether P mode is currently selected as the control exposure mode, and if so, proceed to step (#1010) and check whether the A mode is selectable by checking the internal E2FROM bit. Judging by
If it is selected, change the exposure mode from P to A #1
015), functional data (Fbo, Fbl) as (0,
Change from 0) to (0,1) and return (#1015
). In the above step (#1010), when it is determined that the A mode is disabled, the process proceeds to step (111025), where it is determined whether the S mode is selected, and if the S mode is not selected here, ,
The process further advances to step (171040) to check whether the M mode has been 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 exposure mode to selectable mode, bit (Fbo), Change (Fb+) and return (#1020 to 1030).

Now, when S mode is selected as the control exposure mode (Fbo, Fb+ = L 1), it is determined whether M mode is selected, and if it is selected, it is set to M mode, and if it is not selected, it is set to M mode. , and return to P mode (#1035 to 111045). 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 ($11055), down switch (S
dn) is turned on, the same control as the up switch (Sup) described above is performed, except that the direction of changing the exposure mode is different, so a description thereof will be omitted.

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

Next, the function change switch (SFUN) shown in FIG.
The control when the result is N will be explained. The microcomputer (μC) executes the flow after the data change step (#1205). The microcomputer (μC) determines whether the switch (Ssε) indicating the function to be changed is ON or not (#1205), and if it is ON, determines the function to be changed from the bits (Fbe, Fb+o). #1225
), +/- → S/C → S/A, and after S/A is +/
- Go back to cycling, and then go back to
Change the data of the component (Fbs, 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), $11280), and if the function is in +/- mode (#1285), the exposure compensation amount (
0.5 is added to ΔEv) and the process proceeds to a subroutine (111287) that determines its size. This subroutine is shown in FIG. 18, and if the correction amount (△Ev) is positive, +
As side correction, data Fb4. If Fbs=0.1 and negative side correction, data Fb4. If Fbs=1.0 and the correction is zero, no correction is assumed and the data Fba,
Fbs” Return as O, O (#135
0~#1370).

Returning to FIG. 17, in S/C mode, data (F
bs) to determine whether the current mode is single shooting (S) or continuous shooting, change the data so that it is opposite to the current mode (#1295), and return. The above two modes (
(10/- mode, S/C mode), that is, in S/A mode, the current mode is Spot AP.
(S) or multi-point AF (A) is determined based on data (pb2).1. Change the data (Fbe) to be the opposite of the current mode (#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 (SEN).

If both function change switches (SpuN) are OFF, the up switch (Sup) and down switch (Sd
The process advances to step ($1927) 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). To explain it, first, the microcomputer (μC)
Step (#1800) to check whether p) is turned on or not.
If it is not ON, step (#180
Proceed to step 5) to determine whether the down switch (Sdn) is turned on, and if it is not turned on, return. 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), proceed to step (#1811) and determine whether or not the aperture change switch is turned on. If it is turned on, proceed to step (#1830), which will be described later. Proceed to the following steps, and if it is not turned on, step to change the shutter speed (#1850)
Proceed to. First, I will explain how to change the shutter speed.In step (#1850), add Q and 5Ev,
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 the mode is not M mode in step (#1810), it is determined whether the mode is P mode or A mode in steps (#1815) and (#1820). When in P mode (Fbo, +”O, O), determine whether P shift is prohibited or not (#1817), and if prohibited, return. If not, proceed to step (#1830). ) Proceed to 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, set the maximum aperture value (Avmax) as the aperture value (Av) (#1840); if it does not exceed it, do nothing and proceed to step (#1845) to determine whether it is in P mode. If it is the P mode, the process advances to step (#1879) in the flowchart of FIG. 22(b).

Returns if not in P mode. Step (#18
15) TeP motochi na itokiniha (Fbo, + ≠O
, O), determine whether it is in A mode or not #1820)
, if it is A mode (Fbo, Fb+ = 0.0), proceed to step (#1830) and perform up control of the aperture value (Av), and if neither, that is, S mode (Fbo, Fb+ = 1) .l) is the step (
Proceeding to #1823), the shutter speed (Tv) is increased.

When the down switch (Sdn) is turned on in step (#1805), step (#1805) in FIG.
1865), determines whether the mode is M mode, and
mode (Fbo, Fb+ = 1.O)
, determine whether the aperture change switch (S8.) is ON (#1877). If it is ON, proceed to step (#1885) to change the aperture; if not, proceed to step (#1885) to change the shutter speed. 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) (SA ON), the aperture value (Av) is decreased by 0.5Ev in step (#1885), and then in step (#], 890) That value is the open aperture value (A
vo), and if it is smaller, the aperture value is set as the open aperture value (Avo) (#1895).

In the step (#1890), the aperture value (Av)
is not smaller than the open aperture value (Avo), step (#1895) is skipped and step (#1900
)to go into. If the determination in this step (#1900) is that the mode is P, the process proceeds to the above-described control flow for increasing the aperture value (#1850 to #1860) of FIG. 21(a), and if it is not the P mode, the process returns.

In step (#1865), it is determined that the mode is not M mode, and in step (#1870) it is determined whether or not the mode is P mode. Here, when in P mode (Fbo, I=0
．． O), determine whether P shift is prohibited or not (#1872), and if prohibited, return.

If it is not prohibited, proceed to step (#1885). Step (#1870) Nioite P-E-de-n-iteki (Fbo, 1 * 0.0), Step (#18
75), it is determined whether the mode is A, and if it is the A mode, the process proceeds to the flow for controlling the aperture value reduction after step (#1885), otherwise, it is determined that the mode is S, and the process proceeds to step (#1885). 1879) to 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 (SSεLF) is turned on or not. When OFF (IP+2・“H”)
will return immediately.

The self subroutine when ON (IP+2=r L J ) is shown in the 19th rXJ and explained. When the flag (SELFF) indicating self is set,
This is reset L (#945), exits from the self mode, sets a flag (SELF) to execute the self mode if it is not set (#950), and 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 "H" level, the photometry circuit (LM) is commanded to output photometry data, and serial communication is performed (#1605. #1610
).

Through this communication, the brightness values (Bv, to Bv4) of the four photometric ranges shown in FIG. 14 are input. When communication is completed, the terminal (C8LM) is set to r L J level (1116
15). Next, in step (#1617), set Bvc to B.
Enter the value of V2 and set BUII in step (111618)
Proceed to LIE (#1622), determine whether the flag (AFNF) indicating that the camera is not in AF mode is set, and further check whether the flag (LCONF) indicating that focus detection is not possible is set in step (#1624). If either one is set,
Proceeding to step (#1660), the small photometric range (LM2) at the center is set as the spot value (Bvsp).

When the flag (AFNF) and (LCONF) are not set, the distance is calculated from the feeding pulse, and based on the calculated distance information and focal length information, the image magnification β is calculated from β=focal length/distance (#1625 ), and in the next step (#1630), this image magnification β
is larger than a predetermined value (K), and determines 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) the brightness values (
The average of BVI), (BV2), and (BV3) is defined as a spot photometric value (Bvsp).

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, which flag (AFIF - AF
The range is determined by whether the flag (AFIF) is set, and if the flag (AFIF) is set, the brightness value (Bv+) of the photometry range (LMI) is determined, and if the flag (AF2F) is set, the range is determined. is the brightness value (BV2) of the photometry range (LM2), and when neither flag is set, that is, when the day focus amount of the third island (AF3) is selected, the brightness value (BV2) of the photometry range (LM3) is B
V3) as the spot photometric value (Bvsp) (#1
645~#1665).

After determining the spot photometry value in this way, the microcontroller (
μC) proceeds to step (#450) in FIG. 6 and performs control regarding the AE flock, which will be explained with reference to the flowchart shown in FIG. 21.

First, in step (#1740), it is determined whether or not the AE flock switch (SAEL) is turned on, and the
If not, reset the flag (AELF) (#1755). When it is ON, the flag (A
ELF) (#1745), reset the timer (T1) for power retention (#1750), and set the spot photometry value BV2 as the spot value (Bvsp) (
#1752) Return. In this way, when the AE flock switch (SAEL) is turned on, the power is maintained.

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

It is empty when no card is installed. Communication (II
If I) is present, the terminal (C8CD) is set to "H" level #350), data is set (#352), and the data is output to the rc card (CD) (#355).

Next, communicate once (#357) and wait ($13
60) Execute the data output subroutine (#362) and after completing the data output, set the terminal (C3CD) to the "L" level (#365) and return.

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).

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

Go, Gl, G2. G3 data is lens drive and AE
Using the data for calculation, G3 Lpmax . . . maximum lens extension amount. Next, it is determined whether data of group G+ is necessary or not based on the data obtained in communication (n) (#362-4). Return if not needed. If necessary, set the address G of the Gl data #362-5) and set the serial communication to 3.
Do this twice (#362-6). Next, it is determined whether or not the data in G2 is necessary, and if so, address G2 is set and serial communication is performed twice. Next, it is determined whether data 03 is necessary or not, and if necessary, address G3 is
is set, performs serial communication once, and returns. If the group is not specified, please set the address based on the address with the necessary data entered from the card #36
2-7) Perform serial communication for the number of serial communications input from the card (#362-8). In addition, communication (I
In II) there is no addressing type.

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

The flow of this control is shown and explained in Figs. 23 to 27. In Fig. 23, the microcomputer (μC) first outputs the light emission signal, which is the output data to the electronic flash device, by forcing 19 0N=O
, force 0FF=O, initialize GN control release=O (
#2000 to #2003). Next, step (#200
4) It is determined from the input lens data whether a lens is attached, and if it is not attached, the photometry value (Bvah) of the photometry range (LM4) is
) (instead of this, the overall averaged photometric value may be used), add the film sensitivity (Sv) and the exposure compensation value (△Ev), calculate the shutter speed, and return (11200
5). If a lens is attached, it is necessary to determine whether or not forced P mode is selected based on the data input from the card.112
006), in the case of forced P mode, returns without performing exposure calculation. If it is not the forced mode, exposure calculations are performed according to each exposure mode (112010 to #2040).

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 (BVIIM) of the photometric range (LM4) and the spot photometric value (Bvsp) obtained in step (#445).
) is 2Ev or more (#21
00). If it is 2Ev or more, it is determined in step (#2105) whether an electronic flash device is installed (switch SM of the electronic flash device is ON), and if it is installed,
The control exposure value (Ev) is changed to the photometry value (LM4) of the photometry range (LM4).
BVITM) etc., Ev = BVIIn + Avo+
Calculate by 8v-1+ΔEv (#2115). Here, 1
The reason for subtracting it is to make the background look like IEv over to make it look like it is backlit. In addition, I am trying to properly expose the main subject using a flash from an electronic flash device.

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

Returning to FIG. 24(a), in step (#2105), if the electronic flash device (FL) is not installed, the control exposure value (Ev) is set to the spot value in the photometry range in order to properly expose the main subject. (Bvsp) etc., Ev = Bvs
Find p+ Avo+Sv+△Ev (#2130), proceed to the program ■ subroutine (#2135) to find the aperture value (Av), and shutter speed (Tv), and proceed to 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=
Find this aperture value (Av
) is larger than the maximum aperture value (Avmax) of the lens (#2255), and if so, the maximum aperture value (Avmax) is set as the control aperture value (Avc) (#22
60), proceed to step (#2280). Step (#
2255), the aperture value (Av) is the maximum aperture value (Av
max), the aperture value (Av) is equal to the maximum aperture value (Av).
v.

), and if it is smaller, the open aperture value (Avo) is set as the control aperture value (Avc), and if it is not smaller, the calculated aperture value (Av) is set as the control aperture value (Avc). ) (#2265 to #2275
).

In step (#2280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). In the next step (#2285), it is determined whether this is greater than the maximum shutter speed (Tvmax), and if it is, The control shutter speed (Tvc) is limited to (Tvmax) (#2290), and if it is not larger, it is determined in step (#2292) whether it is slower than the slowest shutter speed (Tvmin), and if it is slower, Let (Tvmin) be the control shutter speed #
2293), if not slow, the calculated shutter speed (Tv
) as the control shutter speed (Tvc) #2295)
, reset the light emission signal (=0) to prohibit light emission (#
2298), return.

Returning to FIG. 24(a), in step (#2100), when the difference in BulIn 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 (LMI) to (LM4) is performed. Value (Bv+ +
Find the exposure value (Ev) from BV2 + BV3 + BV4)/4, and set the aperture value (Av) using the program ■ above.
) and shutter speed (Tv) (#2150),
The shutter speed (Tv) is the camera shake warning speed (Tv)
= 6.1/60) (#2
155). Then, when the speed is less than the camera shake warning speed, it should be determined whether an electronic flash device is installed or not #2160
), if it is attached, executes a strobe light emission program (#2165) and returns.

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

Next, Fig. 25 shows a flowchart for determining the aperture value (Av) and shutter speed (Tv) in A mode. First, it is determined whether or not an electronic flash device is attached. If so, control shutter speed (
Tvc) is 7 (1/125), and the set aperture value (Av
) as the control aperture value (Avc) (#23
00, #2305 and #2345). If it is not installed, calculate the exposure value (Ev) from the horizontal light value, and subtract the set aperture value from this exposure value (Ev) to determine the shutter speed (Tv) (#2315. #2320)
, Then, 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 (Tvmax) is determined in step (#2330). T
vmax) as the control shutter speed (Tvc) and proceeds to step (#2345). If not, it is determined in step (#2331) whether or not the speed is lower than the lowest controllable speed (Tvmin), and if it is low,
In step (#2333), (Tvmin) is set as the control shutter speed (Tvc), and if the speed is not lower than (Tvmin), in step (#2335), the calculated value (Tv) is set as the control shutter speed (Tvc), and each step ( Proceed to #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 ($72400), the exposure
Ev) is calculated from the average photometric value, etc., and it is determined in step (#2405) whether an electronic flash device is installed. If it is installed, the shutter speed (Tv) is determined to be 7 or less in step (#2415). 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). Each proceeds 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
It is determined whether the value is larger than the maximum aperture value (Avmax) (#2445), and if it is larger than the maximum aperture value (Avmax).
) as the control aperture value (Avc) #2450), and if it is not larger, set the calculated aperture value (Av) as the control aperture value (Avc)
(#2455) and return.

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

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

Returning to Figure 6, after completing the exposure calculation (#480), the camera's microcomputer (μC) determines whether there is a signal requesting an extension of the time required from the card to the communication CTV') (#461). , if there is, wait for 10m5ec ($1
463), if there is no requested signal, do nothing and perform the fourth data communication with the IC card (CD) (
#465).

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, communication (IV) is necessary, but it is determined whether communication (IV) is necessary or not.
Make a decision based on the signal obtained in step I), and return if it is not necessary. If necessary, set the terminal (C8CD) to “H”
level (#367), performs serial communication with the IC card (CD) (#375), and notifies the IC card that the IC card is on the output side. Now, wait for some time #377), use the camera as the input side to perform serial communication, and input data from the IC card (CD) #382)
, When this data communication is completed, the terminal (cscD) 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 (IV) to the address input from the card #382-11), perform serial communication the number of times input from the card (6382-12), and return.

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

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

Go...Display data being set...9 serial communications G2...ΔLp...Lens drive pulse...1 serial communication Returning to FIG. 6, when data communication (IV) with the card is completed, the microcomputer (μC) outputs data to the electronic flash device (ST) (#467). 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 #48
7-1), step if not ON (#467-10)
Proceed to. When it is ON, it is forced ON, forced 011F, G based on the control signal of the electronic flash device input from the card.
N limit release 1 flash step each (#467-2)
(#467-4) (#467-6) (#467-
8), the control signal is forced ON, forced OFF,
If G, N restriction release or non-emission is indicated, step them (#487-3), (#487-5).

(#467-7), (#476-9), and if the above four are not shown, (#4B?-3°
), (#467-5°), (#467-7')
(#487-9°) to reset the respective signals and step (
Proceed to #467-10). Step (#487-10)
Now, the terminal (C8FL) is set at the 'HJ level for a certain period of time (T2) to indicate that the camera is in data output mode to the electronic flash device. The camera has an input/output switching circuit (Ilo)
CG) 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 ($1470). 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=0
) 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), and film sensitivity (Sv) are determined by the data input from the IC card (#2815 to #263).

If the above data is not (Av) or (Tv) data,
It is determined whether the data is (ΔAv) and (ΔTv) (#2635). If the data is not (ΔAv) or (ΔTv), the process returns. (ΔAv), (ΔT
v) data, the control aperture value (Avc) is set to (ΔA
v) and (Δ
Tv), add (ΔSv) to the film sensitivity (Sv), and return (#2B40 to #265).

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.

Shutter speed... Shutter speed data or card name data is stored here 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.

AH mode... bo, b+ is one of the currently set P, A, S, H modes, b4 to b6 are 8 of the modes set by the IC card. Each type of data is entered. b2. b3
controls blinking, lighting, and extinguishing of data b4 to be.

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.

Batkan/Head day display... Data for displaying the Patokan mark and the Vero mark.Shivabo is control data indicating whether to turn on or off.

Card display: b+, ba (address D
Pan) is the data for turning on and off the display for +/- of exposure compensation, bs, ba (address DP6s) are:
Single shooting/continuous shooting selection and display off control, bo, b+(
Address DP7H) is control data for blinking, lighting, and turning off the card display, and b4. bs (address DP7.I) indicates multi-point AF/spot AF switching display and light-off control, respectively.

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 0FF) b,...
・Standby (main switch ON, SI 0F
F) ba...Card display ba...Initial load b4...81 0N b5...Rewinding LED Infiner indicator - bo...Focus display presence/absence b+...Focus detection Presence/absence of disabled ba... Presence/absence of tracking mode ba... Presence/absence of multi-point AF b4... AF/M are shown, respectively.

A flowchart of the display microcomputer that controls this display is shown in FIG. 29(b) and will be described. Display control circuit (DI
SPC) to the camera microcomputer (μC) terminal (C8DI
When a signal that changes from "L" to "H" is input from SP), 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 the mode is all off from the input control data #D-
10), in case of all lights off mode (DPQH, bo=1
), all lights are turned off without displaying anything (#D-15). If it is not in all-lights-out mode (DPQH, bo: 0), it is determined whether it is in standby mode or not #D-20), and if it is in standby mode (DPQH, b+ = 1),
Displays the currently set AE mode on the DP3H.

, b+ (#D-25). DPQH,
Card display based on DPyH information, DPII)
Cursor (△) based on data in data change display of I
Displays the position of , and turns off the other lights. The second example is
This is shown in Figure 9(c). FIG. 29(c) shows the display of P mode, card function enabled, △ 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 (#D
-45). When it is initial load (DP9H2b
s”1), the number of film sheets (DPso), and the patrol/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 (DPQH, bs=1), "-" in FIG. 29(d)
” indicates the number of films being rewound at that time.

When not rewinding, determine whether a card is displayed (#
D-70). When displaying a card (DPGH, b2=1)
, decodes the DPH data and displays the card name,
Numerical display based on DP2H data, DP3H b
2 to b6 are used to display what is selected (currently selected) by the IC card, and furthermore, numerical values are displayed based on the data of DPas, 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 the card display mode is not determined in step D-70), proceed to step (#D-105) and turn on the switch (Sl).
If it is ON, the in-finder display is performed based on the in-finder information (#0-11, if it is not ON, the in-finder display is not performed, and each Step (#D-1
Proceed to step 15).

After that, the shutter speed (88) is displayed based on the DPII4 information, the aperture value is displayed based on the DP2H information, and the AE mode is displayed based on the DP2H bo and b+.
Display of film number based on DP3H, DP4H
Batkan display based on DPQH,? Display of card related information based on information of H, display of data change (Δ) based on information of DPQH, be of DP9, b7. Dh
. The AF mode and self are displayed based on the bo of □ (#D-115 to #D-155). An example of this is as follows:
The flowchart of display control (creation of display data) on the camera side is shown in Fig. 29(a) and will be explained first.
In step #2700), it is determined whether or not card display control is being performed based on the data obtained through communication with the card (n), and if card display control is being performed, the mode is set to output the information input from the card as is. , perform serial communication 12 times (
#2705-2730). On the other hand, when not controlling the card display, the mode is to output data created by the camera (shutter speed, aperture value, number of films, etc. - see Figure 29 (e)) (#271, serial communication is performed 12 times). 112720).Next, in step (#2735), it is determined whether or not the card side has the authority to control the buzzer based on the data input from the card.If the card side has the control authority, it is determined whether or not the card side has the authority to control the buzzer. Determine whether or not there is a camera shake warning signal (#2740). If it is a camera shake warning, a buzzer warning is issued regardless of whether or not there is a buzzer warning by the custom card (#2745), and step (#2
765). If it is not a camera shake warning, the process proceeds to step (#2765) without issuing a buzzer warning. If the card does not have the buzzer control 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, determine whether the card function is ON based on the data input in communication (n), and if it is not ON, determine whether there is a buzzer warning based on the data in the E2FROM in the camera.# 2754), performs a buzzer warning if there is one, does not issue a buzzer warning if there is no warning, and returns step (
Proceed to #2765).

If the card function is ON, determine whether or not it is a custom card (#2758) L. If it is not a custom card, proceed to camera control and perform the above-mentioned control. If it is a custom card, determine whether or not there is a buzzer based on the communication (IV) data input from the card #2760), and if so, issue a buzzer warning #275
B), proceed to step (#2765), 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 Interaction (IV) when it is ($12770), step ($12
775). When there is no write control signal, step (#2770) is skipped and step ($127
Proceed to 75).

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 if the available exposure modes have been changed.
Compare the FROM data and the data input from the IC card (CD) to make a judgment #3203), and if they are different (that is, there has been a change), force the exposure mode to P mode. Set the data (Fbo, Fb+) to (0, O) #3205) and return.

When the display control (#471) described above in FIG. 1) Determine whether 10 seconds have passed (#
474). If the time has elapsed, the process advances to step (#490) to perform exposure control. If 10 seconds have not elapsed, return to step (#180). When self-timekeeping is not in progress (SLP=O), the process advances to step (71473) to determine whether the release switch (S2) is turned on or not.
), proceed to step (#520), permit all interrupts, and return.

When it is ON (IP?='L J), it is determined whether the release prohibition data obtained through communication (I[) is set or not (#475), and if it is set, the step (#475) is set. 520). On the other hand, if it is not set, it is determined whether the self mode is selected (#476), and if it is not selected (SE
LFF=0), proceed to step (#481).

When selected (SELFF=1), set the flag (SLP) indicating self-timekeeping ($1477), and reset and start the timer (separate from power hold) (17478). Then, in order to maintain power, a flag (
OPF) should be set #479), AE flock flag (
AELF) is set (#480), the measured value is fixed, and the process proceeds to step (#180).

Step ($148) to proceed to step (#475) in Figure 6 when not in self mode (IP+2='HJ)
In 1), manual focus mode I: MFF=
1 (focus lock or manual focus adjustment using only focus detection)], and if it is manual focus mode, the process proceeds to step (#490). When not in manual focus mode, step (#48
Proceed to 5). In step (#485), the flag (AFEF) indicating focus is set to zero!・Determine whether or not the
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, the terminal (C3C
Set D) to r)(J level (11390) and communicate (V
), set the data indicating that it is #391), output the camera side (#392), and perform serial communication 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 11385), performed serial exchange 8 times (#396), and connected the terminal (C8CD) to r.
Set it to L J level (#397) and return. This data is data for the memory card memory.

Here, the data contents are shown and explained in the CA (-) 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
In the case of N (IP7=rLJ), 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); if it has not been input, it is determined in step (#510) whether or not it is continuous shooting mode, and if it is continuous shooting mode (Fb3
= 1), enable all interrupts in step (#515) [
Proceed to the SO3 routine. When not in continuous shooting mode (Fb
3=o) returns to step (#505) and waits for the release switch ($2) 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 (11495) is shown in FIG. 30(a) and will be described. First step (
#2805), connect the terminal (C8ST) between (t3) r) (J
level and indicates 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) (#
281 In the next step (#2815), the control aperture value (
Avc), the aperture control is performed and mirror-up is started. Next, the lens is driven during release. To explain this as shown in FIG. 30(b), first, it is determined whether the card function is ON or not (#2822-0).
Check whether there is a snap drive bit signal input from the C card that indicates lens drive during release (#28).
22-1), and if there is no signal indicating card function OFF or snap drive, step (#2822-4)
) and waits for the mirror up to be completed, and when the mirror up is completed (■P2o="L"), returns.

If the above signal is present, drive the lens by the amount of lens drive (Δn) input from the card (#2822-3), stop the lens (#2822-4), and wait for the mirror up to be completed (#2822-3). 5). Mirror up is completed (
■P2o=“L”) and return.

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

If it is ON, 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 bit, it is determined whether or not a default card is inserted (#2830-5). Returns if it is not a deformed force card. In the case of a defocusing card, the count pulse number (CNT) at the current position of the driven lens is set as "CT"#2830-6
), the difference (Δ
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 (#2836), and the first act (not shown) is started (#2837). And the card function is O
It is determined whether it is N or not (#2838), and if it is OFF, the flow moves to wait for the exposure time (T) to elapse (#2846).

On the other hand, if it is ON, it is determined whether or not defocusing is in effect (#2839). If it is a deforming force card, the pulse currant at the current position of the lens is set as CT' in memory L (#21340), 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 it is not a deforming force card, the exposure time (T) is reached (#284f3), and when it becomes T, the second act (not shown) starts running (#2847) and the running is completed. Wait for a certain amount of time (#2848), stop the lens drive motor (#2849), and return.

FIGS. 31(a) and (b) show the steps (#) in FIG.
500) is a flowchart of the control for winding one frame of the film shown in FIG. To explain this, in Fig. 31(a), the microcomputer (μC) outputs a motor hoisting signal to the motor control circuit (MD), and the timer (T
3) Reset and start (#2850. #28
55).

This timer winds the film to the last frame,
This is a timer to detect when the film is stretched. The microcomputer (μC) switches the switch (SIJD) to indicate that one frame has been wound in the step (#2860).
) is turned on, and if it is not turned on, it is determined in step (#2865) whether 2 seconds have passed in this state, and if 2 seconds have passed, the motor is controlled to stop. (Assuming that the film is taut in #287, control the film tautness (#2875), and then set the cancel signal to 1 to cancel the bracketing or auto shift that is continuous shooting in #2876). Perform communication (#2877) and return. The above-mentioned subroutine is shown in FIG. 31(b) and will be explained. A signal is output to reverse the motor (#2930).
), the film detection switch (SEL, , ) is turned off.
Wait until it becomes F (#2935) and turn the switch OFF.
When F is reached, the motor is stopped (#2955) in order to wind the film into the cartridge chamber, and then the process returns.

Returning to FIG. 31(a), when the 1-frame winding completion switch (SWDON) 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 (N,) of the counter indicating the number of completed film shots is incremented by 1, and the process proceeds to step (#2900). In step (92900), this number of films (N,) is written into the E2 PROM.

Next, when the back cover close detection switch (SRC) or the rewind switch (SRJ) 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. In the flow shown in the same figure, the microcontroller (μC) first prohibits interrupts to this flow (#3000), and then steps (#3000).
05), it is detected whether the rewind switch (SR, ) is turned on. If it is ON, execute the C rewind routine shown in FIG. 31(b) to perform the rewind operation, permit interrupts, and return (#301).
0). When the rewind switch (SRw) is not turned on, it is assumed that the camera back closing switch (SRD) is turned on.
Furthermore, to restore the bracket function or auto shift function, set the cancel signal (used for data communication) 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 (SpLn) is OFF, step (#310
Proceed to 0). On the other hand, if there is a film (i.e., 5FL11 is 0N (7)), the terminal (C8DX
) to rHJ L/bevel and film sensitivity reading circuit (
DX) and transmits film sensitivity data (S
v) and the number of film shots (N), and when communication is completed, rLJ L/bevel the terminal (C8DX) (#
3020~#3030). Then, set the number (N,) to -2 (#3035), then the terminal (C3DISP)
r) IJ level, performs serial communication with the display control circuit (#3045), and outputs a signal indicating initial load (D
P9Hbt=1) and the data on the number of films are output, so that data other than the data indicating the number of films (N, ) are not displayed. When serial communication is finished, the terminal (C3DISP) is set to “L” level (#3050
). The value of the number of films (N,) is displayed using two 7 segments. Next, the microcontroller (μ
C) outputs a signal indicating motor winding to the winding control circuit (#3055) and waits for one frame to be wound (#3055).
3080), when the 1-frame winding switch (Sun) is turned on, 1 is added to the number of film sheets (N,), and it is determined whether or not it has become 1. If it is not 1, step (#
Return to 3040). If it is 1, step (#
3075), stop the motor, and proceed to step (11).
3095). Then, in step (#3095), the number of films (N,) and the film sensitivity are set to E2.
Write to the specified address of PROM, and after writing is completed,
Enable all interrupts (#3100) and return.

Here, in this embodiment, setting and resetting of flags and bit 1. It should be added that it is the same as O.

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 the close-up card will be explained.

Here, the close-up card is used when taking close-up shots.

Close-up card〉 The close-up card is the 33rd card when attached to the camera.
Execute the reset routine shown in the figure and register the flag register (R
AM), reset all E-5), and go to sleep.

Next, when the camera sends a signal that changes from "L" to r HJ to the card terminal (C8CD), the card
4 Execute the interrupt shown in Figure 4. Here, the card performs serial communication once in synchronization with the clock sent from the camera to input data indicating the type of communication (E
-15).

From the data from this communication, determine the type.E-2
0), communication (I), use the card as the data input side E-25), perform serial communication (E-30), and receive data (see CAHCD) from the camera. Based on this data, a data setting subroutine is executed (E-30), and the computer 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 close-up card table.

In communication (n): ・FL forced ON (=1) C8II
-1-bl・ON restriction release (-1) C8I
I-1-b3・Whether the card performs display control C8I
I-1-BN・Card function 0N10FF
C8II-1-BS・With/without camera shake buzzer
C8U -1-b7・P shift prohibited (”1)
C8I[-2-b.

・Forced P mode (=1) C8n -2-b
l・No. ■No communication (=O) C8II~2-
ba release prohibited (4) C3lI −
2-ba・AF Rawanhot (=1) C3l
I-2-be・Tv, Av/display data C8I
I-3-bs・No. ■Communication Yes (=1) C
3lI -3-b-・No.■Communication Yes (4)
C8n -3-bs・Group specification (=O)
C3lI-3-be・Photometry loop repetition
C3II-3-bv/shake buzzer control (=1)
C8I[-4-b.

・AF spot (=1) C8m -4-
bl/low contrast scan prohibited (=1) C8II
-4-ba In the above, AF raw shot means prohibition of AF tracking mode after focusing by the camera.

In addition, the reason why the AP spot is used in the above case is that in the case of close-up photography, the image magnification is large, so even the slightest movement of the subject can cause the focus to shift. This is to prevent focus detection information from areas that have moved, which can sometimes make it difficult to focus. Also, the reason why low-contrast scanning is prohibited is that with a macro lens, the range in which the subject is in focus is narrow, and the lens quickly becomes low-concentration.

In addition, all signals other than the above are rQJ, and from the table, the * mark is set to "1" or rQJ depending on the time, "1"
When , the control is ON, and when it is RO, it is OFF.

"0" for things that are fixed.

Decide on "1". In communication (II), in order to specify group 1 of communication (III) in group communication, C8ll-9-bl.1. There are two types of communication (IV): display and control data, so C3lI-10-bl, b2
=1.1. Otherwise, rQJ is used.

Note that in the above table, any data may be stored in the blank areas.

In communication (VI), a signal indicating that the sleeve is available is sent. This is because there is no write control to the E2PROM.

Next, the data setting subroutine is shown in FIG. 35(a) and will be explained. First, steps (E-146) and (E-
147) to set the display control data to "0" and set the release prohibition to r.
Initialize QJ and proceed to step (E-160).

Step (E-16) checks whether the DISREQ (card name display request) signal obtained in communication (1) is "1" or not.
0), and if it is "1", set the display control data to rlJ and set the card display function 0N10FF to 0N(1).
(E-17 (1, E475). Then the flag (S
IF) is set or not. E-200
), if it is not set, set this flag (SIF) as if this flow is going through for the first time (E-205
), reset and start the timer (E-210
) Proceed to step (E-215). Even when the flag (SIF) is set, the process proceeds to step (E-215). In step (E-215), the timer is set to 1.
Determine whether 0 seconds have passed. If 10 seconds have not elapsed, set the photometry loop repeat signal to "1" and set E-22.
0), sets the card display base and data for only card display (E-222), and returns. This display is shown in FIG. On the other hand, if 10 seconds have passed, the photometry loop repetition signal is set to "0" (E-225), the flag (SIF) is reset (E-226), and the display control data is set to "0" (E-227). ), return.

If DISREQ=0 in the above step (E-160), proceed to step (E-162) and connect the terminal IPS
” (i.e., switch SεM, 5FUNI Scn+
Determine whether either 5ells or S+ is ON) and reset the display flag (display F) that indicates control to display the card name when it is "L". E-163)
, If it is not "L", do nothing and step (
Proceed to E-165). This step (E-165)
After resetting the flag (SIF) in Fig. 35(b)
Proceeding to step (E-260), it is determined whether the self signal obtained in communication (II) is "1" or not.

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.
E-430) and turn on the card switch (Sco)
card switch (Sen).
When is OFF, reset this flag (ScoF) (E-460), determine whether the display flag (display F) is set (E-465), and return if not set. If it has been set, the process advances to step (E-170) and the display of the card name is controlled. Card switch (Sco) at step (E-430)
When is ON, it is determined in step (E-435) whether or not the flag (SCDF) is set, and if it is set, it is determined that the switch continues to be operated and the process proceeds to step (E-465). If it is not set, please reset it (E-440), the card function is currently OFF.
It is determined in the next step (E-445) whether or not it is turned on, and if it is turned on, it returns as 0FF (communication (n) data) (E-450).

If it is OFF, it is turned ON (communication (n) data) and the process proceeds to step (E-170), where card name display control is performed.

Returning to Figure 34, if it is not communication (I), determine whether it is communication (■) or not (E-40), and if it is communication (II), put the card on the output side to output the data set above to the camera. Then, it performs serial communication 10 times (E-50) and goes to sleep.

If it is not communication (n), determine whether it is communication (III) or not (E-51). If communication (1), enter the card side (E-52) and perform serial communication 15 times. (E-53), inputs camera data, and in the next step (R-54) calculates data for controlling the camera (including exposure calculation), and goes to sleep. This calculation will be described later. Communication (IV) if not communication (I[I)
If it is communication (IV), the data is output side E-60). If it is display control, it is determined E-65). It is assumed that data is to be output (E-70), an address is set, serial communication is performed nine times (E-75), and the device goes to sleep. When not display control (Tv, Av day) T
Specify the data address of v and Av, perform serial communication four times, and go to sleep. When it is not communication (■), it is assumed that it is communication (Vl), and first performs serial communication according to the clock from the camera on the data output side (E-2
5) Sleep.

Next, the calculation subroutine of step (E-54) in FIG. 34 is shown in FIGS. 37(a) and 37(b) and will be described.

First, in step (E-500), the camera shake limit T'uH is determined from the focal length f using the formula Tv+-1,25X1og2f150 +5.875, and this TVH limit is determined in step (E-505).
~ (E-520).

Subsequently, in steps (E-525) to (E-535), the shutter speed that determines the flare flash is set (T) in order to perform natural light photography using Avβ and Av+ as much as possible.
Processing is performed to find the smaller of VH) and (TVx).

Incidentally, here, the Tvx tuning speed is expressed. Next, in steps (E-544) to (E-570), the control limits of the control shutter speed (Tvc) and the control aperture value (Avc) are determined from the control limit exposure value. In the next step (E-575), it is determined whether the image magnification β is valid or not. If it is not valid, proceed to the flow after step (E-670), and if it is valid, proceed to step (E-580). It is determined whether β≧1. If β≧1, the features of this close-up card cannot be utilized, so the card function is turned off (E-585) and the process returns. When β is less than 1, the process proceeds to step (E to 590), and it is determined whether β<174. Here, when β<1/4, step (E-670
), and when β>1/4, proceed to step (E-595
), Avβ is calculated according to the formula Avβ=1 1ogpl/β. The situation in this case is shown in FIG. 38, and the program diagram is shown in FIG. 39.

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

Let AVc be AVβ. Calculated shutter speed TV to EV
It is determined whether this TV exceeds TVmax, and if it exceeds it, the control shutter speed (TV
c) is TVmax, and the control aperture value (AVc) is EVs.
- Recalculate TVmax color and proceed to #660.

When TV≦TVmax, determine whether TV<TVF, and when TV≧TVF, set TVc to TV #6
Proceed to 60.

When TV<TVpte, the control aperture value (AVc) is
Calculate s-TVF and determine whether AVc<AVmin.When AVc<AVmin, AVc=AVm
in, recalculate TVc as EVs-AVc, and (#
660). When AVc≧AVmin, set TVc as TVF and proceed to 1” (#860). Exposure value (EVs
) is greater than or equal to TIIF +Avmin, and RV
When s < TVF + AVmin and the flash is ON, proceed to flash control.

E-725: Calculate background exposure value EVA=BVA+SV.

E-730--In order to make the background IEV7 under,
Let Vc=EVn+1. This is because the background light and strobe light are used to properly expose the main subject.

E-735...Shutter speed TV=EVC-AVC
KonoTV calculates TVH (TVF camera shake limit speed and T).
VxE-775 (slowest shutter speed) or higher), and if it is, TVc; TV determines whether it is equal to or higher than the longest shutter speed (TVmin), and TVmi
If it is less than n, the limit value is set as TVc=Tvmin and the process proceeds to door 80.

If TV<TVp, then the control is tuned to TVc=TVx, the control aperture value AVc=EVc-TVc, and it is determined whether or not this AVc exceeds the maximum aperture value (AVmax). If it exceeds, limit it to AVmax and use E-78.
Go to 0.

E-780... Calculate the flash dimming level (described later), set the flash emission signal, turn off the camera shake buzzer signal, and proceed to (2).

β upper 1/2 → TTL=χ 1/2≧β≧1/3→ TTL=χ+0.251/3≧
β≧1/4→ TTL=χ+0.51/4〉β →
Assuming TTL = χ + 0.75, when the subject occupies the screen becomes smaller (β is small), the amount of reflected light returned from the subject decreases, the light adjustment completion signal is delayed, and the amount of light emitted increases, resulting in overexposure. becomes. In order to correct this, the amount of light emission is reduced as β becomes smaller. When β cannot be used, assuming that there are many subjects with 1/4>β, set TTL=χ+0.75.

Then, set the control light amount (SVc) to the film sensitivity SV.
Add L.

To explain this dimming level calculation as shown in FIG. 37(c), the exposure value (EVC) is calculated from AVc+TVc, and EVc
-EVs (exposure value of main subject)>0.

When EVc-EVs≦0, the correction amount is set to χ=1.5,
Set the light emission amount (light control amount) to under, so that the main subject is not overshot, and proceed to E-840.

When EVc-EVs > O(7), EVc-EVs >
3. Determine whether or not there is TE, and if EVc-EVs > 3, set the correction amount χ=0 and proceed to TE-840. EVc-EV
When s ≦3 (7), x = 1/2 (EVs - EVc
+3) To L, To E-840#: Proceed. Image magnification (β)
Determine whether or not it can be used, and if it can be used (#660), press E.
When Vs≧TVF+AVmin or when the flash is off (including when the flash is not attached), camera shake is determined. Camera shake detection is the same as for sports cards.

In #775, the camera cannot be released unless the camera is in focus. If the camera is not in focus immediately, release is prohibited = 1,
If the camera is in focus, the release will be returned as 20, prohibition of release.

When β information is not valid or β < 1/4 #
Proceeding to 670, in the above step (E-870) Av+
The calculation is performed according to the formula. Steps (E-680) to (E-6
In step 95), the limit correction of the aperture value is performed, the control shutter speed is determined from the determined control aperture value (TVc), and the process proceeds to #660.

An example of the RAM map in the camera is shown in Table 4. In the case of such a RAM (including E2FROM) map, group M of data (Go, Gl, G2) is
PI, HF3. When MPIO is required, if a group is specified, the above MPI, HF3. The start address and number of MPIOs may be stored and read out in response to a signal. In existing card systems, these only read fixed data, so
It is possible. However, if a new card with other functions is created and, for example, the data MP2 and HF2 of the above functions are required, the other data cannot be read out.

To make this possible, it is necessary to directly specify the start address of the data and its number (direct addressing type). However, in that case, it is not possible to specify discrete data (for example, only HF2 data and P7 data), and all data from MP2 to MP7 is specified, and the data transfer ( (memory and time) is wasted. 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 1 Table 1 (Continued) Table 4 Table (Continued) Table Function Data (Fbn) RAM Table 4 (M) Table 7 Table 1 (Continued) Table (Continued) ) Table 1 Lens (I) Table 10 Lens (n) Table Lens information in camera Since a spot area is selected, it is easy to focus even if the subject moves.
No lens hunting occurs.

In addition, when using an accessory with a close-up shooting control function, this accessory generates a signal that indicates the spot area, so the switching circuit on the camera body side is automatically set to the spot area side by this signal. This is convenient. If this accessory is an IC card, the accessory will be small and lightweight.

[BRIEF DESCRIPTION OF THE DRAWINGS] The figures are all related to embodiments of the present invention, in which 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 flowchart showing a camera reset routine. Figure 4 (a
) is a circuit diagram of the lens circuit, and FIG. 4(b) is a side view of the lens. FIG. 5 is a flowchart regarding data communication between the camera and the card. FIG. 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., and FIG. 7 is a flowchart showing a routine for determining the AF mode and locking the focus. FIG. 8(a) is a circuit diagram of an electronic flash device, and FIG. 8(b) is a circuit diagram of an electronic flash device.
) is an explanatory diagram regarding the display, FIGS. 8(c) and 8(d) are flow charts showing an interrupt routine regarding the electronic flash device, and FIG. 9 is a diagram showing the interface circuit of the electronic flash device. FIG. 1O is a flowchart of lens data input. FIG. 11(a) is a flowchart of flash data input, and FIG. 11(b) is a flowchart of flash data output. Figure 12(a) is an AF flowchart, Figure 12(b)
), Figure 12 (C), Figure 12 (d), Figure 12 (e)
, FIG. 12(f), FIG. 12(g), and FIG. 12(h) are flowcharts related to this, and FIG. 13 is a diagram showing an example of display in the finder regarding this. FIG. 14 is a diagram showing the distance measurement range and photometry range within the photographic screen. Fig. 15 is a flowchart for data setting, Fig. 16 is a flowchart for changing exposure mode, Fig. 17 is a flowchart for selecting function mode, Fig. 18 is a flowchart for exposure compensation, Fig. 19 is a flowchart for self-setting, 20
The figure is a flowchart for creating photometric data, and Figure 21 is an AE
This is a flowchart of floc. FIGS. 22(a) and 22(b) are flowcharts for setting the aperture and shutter speed. FIG. 23 is a flowchart of exposure calculation, and FIGS. 24(a) and 24(a)
b), Figure 24 (C), Figure 25, Figure 26 and Figure 27
The figure is a flowchart of each mode therein. 28th
The figure is a flowchart of control using an IC card. FIG. 29(a) is a flowchart showing the display routine, FIG. 29(b) 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. Figure 30 is a flowchart of exposure control, Figure 30(b)
and FIG. 30(C) is a flowchart of lens driving. FIG. 30(d) is a flowchart of shutter speed control. FIGS. 31(a) and 31(b) are flowcharts for winding one frame of film, and FIG. 32 is a flowchart for showing an interrupt routine for closing the back cover. 33, 34, and 35 are diagrams showing the operation flow of the close-up card, FIG. 36 is a diagram showing a display example, FIG. 37 is a diagram also showing the operation flow, and FIGS. 38 and 3.
FIG. 9 is an explanatory diagram thereof.

Claims (3)

[Claims] (1) In a camera system capable of switching the distance measurement area for autofocus between a spot area and a multi-point area, it is preferable that the camera system has a means for forcibly setting the distance measurement area to the spot area in close-up shooting mode. Features a camera system. (2) The camera body includes a camera body and an accessory that can be attached to and detached from the camera body, and the camera body has a switching circuit that switches the distance measurement area for autofocus between a spot area and a multi-point area, and and a receiving circuit that receives a multi-point/spot switching signal and outputs a switching signal to the switching circuit, while the accessory having the function of controlling close-up photography for the camera body is the multi-point/spot switching signal. / A camera system characterized by outputting a signal indicating a spot area as a spot switching signal. (3) The camera system according to claim 2, wherein the accessory is an IC card.