JPH02118528A - Camera system - Google Patents

Abstract

PURPOSE:To make a hand shake as hard to occur as possible when a snap picture is taken by calculating a hand shake limit shutter speed according to the focal length of a photographic lens and determining an aperture value and a shutter speed in consideration of the hand shake limit shutter speed. CONSTITUTION:The depth of field between the focus position of a subject and a position farther than the position or the same specific position is calculated and an aperture value AVDEP which satisfies the depth of field is calculated. Further, the hand shake limit shutter speed TVF is calculated according to the focal length of the photographic lens and an exposure value EVS is calculated from the photometric value of a photometry means. A control aperture value AVC and a control shutter speed TVC which control exposure are determined from expressions I - III. Thus, the aperture value and shutter speed are determined in consideration of the hand shake limit shutter speed, so the hand shake is hard to occur. Further, the aperture which satisfies the depth of field between the subject and the same position or a position farther than it is determined, so an excellent snap photograph wherein the subject and background are both in focus is obtained.

Description

[Detailed description of the invention] Emperor Retired Emperor 11] - Standing The present invention relates to a camera system.

Japanese Patent Application Laid-Open No. 133722/1983 discloses that the focus position of the subject is slightly shifted toward the background in order to take a photograph in which both the subject and the background are in focus.

In order to keep both the subject and the background in focus, you can consider reducing the aperture value and increasing the depth of field. However, when the aperture and shutter are controlled separately, a problem arises in that the aperture value is reduced (then the shutter speed to obtain the same exposure value becomes slower, and camera shake is more likely to occur).

The present invention has been made in view of these points, and it is an object of the present invention to provide a camera system that prevents camera shake as much as possible when taking snapshots.

In order to achieve the above object, the camera system of the present invention has the following features:
means for calculating the depth between the focus position of the subject and a specific position that is further away from or the same as the focus position, means for calculating an aperture value AVDEP that satisfies the depth, means for specifying a camera shake limit shutter speed TVF, and a photometry means; It has a means for calculating an exposure value EVS based on the photometric value of the photometering means, and a determining means for determining a control aperture value and a control shutter speed TVC for controlling exposure as shown in the following (1), (2), and (2);
EVS≦TVF + AVoz (However, if AVoz is the open aperture value, AVC-AVoz+ TVC-EVS-AVOZ■TV
F + AVoz < EVS < TVF + AV
DBP i? If available, AVC-EVS-TVF, TV
If C-TVF BVS > TVF + AVDEP, A
VC≧AVDEP.

AV that satisfies TVC≧TVF, EVS-TVC+AVC
C.TVC.

In this case, the specific position can be set to an infinite point.

Further, each of the above-mentioned means other than the above-mentioned photometry means may be provided as an accessory that can be attached to and detached from the camera body.

F-1゜With this configuration, the aperture value and shutter speed are determined taking into account the camera shake limit shutter speed, so blurring is unlikely to occur, and the depth of field at a position that is the same as or further away from the subject is satisfied. Since the aperture to be photographed is determined, a good snapshot with both the subject and the background in focus can be obtained.

In addition, when each of the above-mentioned means other than photometry means is provided in an accessory such as an IC card, calculations and decisions regarding the aperture value and shutter speed are performed within the accessory while the accessory is attached to the camera body. Based on this result, exposure control of the camera body is performed.

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 consists of a COD, an integral control circuit, and an A/D conversion circuit. /D conversion and output to microcomputer (μC).

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

(LM) is a photometry circuit that performs photometry for four areas (described later), converts the photometry values into A/D, and converts the photometry values into microcontroller (μ
C) as luminance information. (DISPC) is a display control circuit which inputs display data and display control signals from a microcomputer (μC) and causes a display section (DISPr) 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 (CD) includes a custom card that allows you to change and select camera modes depending on the user, and controls various functions of the camera depending on the shooting situation (AH program, AE mode, AF mode, etc.) 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 the camera's microcomputer (μC) and electronic flash device (ST).
(STC)
1 is a light control circuit that receives reflected light from a subject during flash emission that has passed through a photographic lens (not shown), and stops the flash emission when the appropriate exposure amount is reached. (LH) 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, and sends pulses to the microcontroller (μC) at every predetermined rotation angle. Output.

The microcomputer (μC) counts these pulses, detects the amount of extension from the current position ω, 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 control signals from a microcomputer (μC);
CT) is an aperture control circuit that controls the aperture based on control signals from a microcomputer (μC), and (MD) is a microcomputer (
This is a motor control circuit that controls the winding and rewinding of the film based on control signals from the microcontroller (μC). (BZ) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is a battery that serves as a power source;
DC/DC is a DC/DC converter (DI) to stabilize the voltage (VDD) supplied to the microcontroller.
(D4) is a group of diodes that provides a voltage lower than the voltage (Voo) to the microcontroller when the DC/DC converter is OFF, reducing power consumption.The hardware of the camera microcontroller (μC) is this low! Since it can be operated with voltage, an interrupt is generated, but the microcomputer (μC2) of the IC card (CD) cannot be driven with this low voltage. (R1
1) (CR) is a reset resistor and capacitor for resetting the microcomputer (μC) when the battery is installed. (Try) is a power supply transistor that supplies power to a part of the circuit described above.

Next, to explain the switches, (SRE) is a battery installation switch that turns off when the battery is installed.When the battery is installed and the switch (SRE) is turned off, the microcomputer (μC) A signal changing from "L" level to rHJ level is applied to the terminal (RE), and the microcomputer (μ
C) will execute a reset routine to be described later. (SEW) is a normally open button type exposure mode change switch, and the operation of this switch (SEW) and the up switch (Sup) and down switch (Sdn) described later
The exposure mode is changed by the operation. (SFUN
) is a normally open button-type function change switch, and functions are changed (for example, switching between continuous shooting and single shooting) by operating this switch and the up switch (Sup) and down switch (Sdn). (Sen) is a normally open button-type card switch that is used when a card is installed to enable/disable card functions or to change data settings on cards other than program cards. Yes (details will be explained later). (Sea
s) is a card data setting switch that is operated when transitioning to data settings when the card is installed. (81) is a switch for performing preparatory operations necessary for photography such as photometry and AP operation. Then, the first stroke of the release button (not shown) turns it on. The above switch (SEW),
(SFLIN), (SCD), (Scps), (
When any one of St) is operated and turned ON, an interrupt (INT+), which will be described later, is executed. (SN)
is the main switch that enables the camera to operate, and by turning this switch ON or OFF, the following (described below)
INT2) interrupt is executed.

(Sr+up) turns ON when the mirror is raised, the shutter mechanism is charged, and turns OFF when the mirror is lowered.
This is a switch that becomes F.

(Se) is the release switch that is operated when performing a shooting operation, and it is turned on by pressing the second stroke (deeper than the first stroke) of the release button. (Siro) is the release switch that is operated when performing a shooting operation. This is a single-frame switch that is turned on when the switch is turned on. (SAEL) is a switch for performing AE focus (exposure lock) and consists of a normally open button switch. (SAF7M) is a switch for AF and manual focus adjustment. This is a state switch for switching the focus adjustment mode.

(SSE) is a permanently 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 (S, u) 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 (SAI
When J) is not operated, the shutter speed is changed by operating the up switch or down switch. (S
FL-) is a film detection switch that detects whether or not film is loaded, and is placed on the film rail surface near the spool chamber, and is turned off when film is present. (SRc) is a back cover close detection switch that turns on when the back cover is closed and turns off when it is opened.
) executes the interrupt routine described below. (hJ is a switch to start film rewinding. When operated, it turns ON, executes the interrupt routine described below, and turns OFF when the back cover is opened. (SCR) is a switch for starting film rewinding.
When the IC card installation switch turns OFF when a CD (CD) is inserted, the microcomputer (μC2) of the IC card (CD) is reset.

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

(Sup) is a normally open up switch that changes or adds the data to be changed, and (Sdn) is a normally open down switch that also performs subtraction.When changing the aperture value in 0M mode, change the aperture. Switch (SQLI)
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 IP2o) and (IF5.) each become "L" level. In FIG. 1, a line (WI) common to each of the switches is connected to a ground potential point (GND).

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

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

(1) Custom card; This IC card allows the photographer to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are considered unnecessary), or to 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 8 possible combinations.
When setting the mode, the selected combination is displayed as shown in FIG. 2(b), and when shooting, the selected exposure mode is displayed [
FIG. 2(C) (A mode selection)] is performed. Dots around the letters (or numbers) indicate blinking. Details will be described later. The entire display is shown in FIG. 2(a) for reference.

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

Regarding (iii), which is related to the operation of the lens side switch, it depends on what AF (autofocus) mode is selected when the switch provided on the lens side (described later) is operated. The modes are: ■First, when the switch is not operated, (E-1)
One shot over the entire area using multiple points/spots (following judgment after focusing) ■When the switch is operated (E-2) Focus lock (E-3) Spot AF (E-4) Continuous AF , when setting the rCuS as shown in Figure 2(d).
The numerical value "3" of t-3J becomes "2", and the blinking display "1"
” will be “1” to “3”, but this blinking display will be “1” to “3”.
"3" corresponds to the above-mentioned rE-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 (III) above, by turning on the card key once when setting the mode, (i) to (I[[
) modes are selected in sequence, and by pressing the up switch or down switch, the function (set value) in that mode is selected. Modes (i) to (III), respectively.
and functions can be set cyclically.

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

(III) Function card; (3-1)) I/S card ((highlight/shadow)
card) This card makes white objects whiter and black objects darker, and overshoots the exposure value obtained by the camera by a certain value (+
2.0) (highlight) and under (-2,0) (shadow), and this can be done by inserting this card (one of the H/S selections) and operating the AE flock switch. be exposed.

(3-2) AE bracket card This card allows you to adjust the exposure obtained with the camera to
(3-3) Auto shift card This allows the exposure to be shifted by 0.3, 0, 5, or 1 stop to the underside (details will be explained later). The purpose is to change the photographic effect (depth or speed) by changing the combination of value and shutter speed.

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

(TV) Data memory card: This is used to store shooting data, including: ・Film counter ・Control aperture value ・Control shutter speed ・Exposure compensation value ・AE mode ・Lens information (focal length and aperture Fso) ・Film sensitivity Data can be stored in memory, and these data can be viewed using the LCD display on the camera body (details will be described later).

Next, we will explain the operation of the camera using a microcomputer (μC) shown in Figures 3 onwards.
) will be explained based on the flowchart, and each part will be explained in detail as necessary.

When the battery (E) is installed, the battery installation switch (STI)
E) turns OFF, and a signal that changes from "L" level to "H" 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) via the IC card (C
A clock is also sent to D) from the microcomputer (μC). In addition, in the case of an interrupt, turning on the DC/DC converter and starting the clock are automatically performed by a hardware circuit.

Next, the microcomputer (μC) is shown in Figure 3 [: RESE
T] routine is executed.

First, the microcomputer (μC) prohibits all interrupts to this flow ($1100) and sets all output terminals other than the DC/DC converter control (PWO) to the rLJ level (11105). In addition, the flags in RAM [Table 8 (
(described later)] and reset all RAM (registers) (
#110).

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

Next, in step (#115), the number of films (N+) stored in g2PJ'lOM, the film sensitivity (S
v) is read and transferred to a predetermined RAM. Thereafter, it is determined whether the main switch (sn) is in the ON state (#120). If the main switch is in the OFF state, (IPa-'HJ), step (#1
Proceed to 25) and turn off the power supply transistor (Try)
(Mf=rLJ), and data communication (VI) of serial data with the card is performed.

Section 22 briefly explains serial data communication. A serial communication command sends a signal to the other party to start data transfer (in the case of a card, C5co=r
HJ), followed by the serial clock for transfer (SCK
) is output from the camera. The output side (camera or other party) outputs one bit of data in synchronization with the rising edge of this clock, and the input side (the other party or camera) inputs one bit of data in synchronization with the falling edge of the clock. This is 8
By repeating this process (8 bits), one data transfer is completed, and by repeating this process as many times as necessary, the necessary data can be obtained. Data communication with lens (LE) 1
The same applies to data communication with the display control circuit (DISPC) and data communication with the electronic flash device (ST).

Here, the data communication (VI) with the above IC card is
It is shown and explained in Figure (f). In this communication, first the terminal (C
8CD) as r)(J and request communication (#27).

Next, data indicating that data communication m) is set is set, the camera is set on the output side, and data communication of data indicating communication (Vl) is performed (#272. to #27
7) 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, input the terminal (C) to indicate the end of communication.
8CD) to "L"(#286). Based on the data input in this way, the camera's microcomputer (μC) determines whether it is safe to sleep (stop).
! The lock and voltage (V
DD), these clocks and voltages will not be sent during the operation of the IC card (because the clock will stop and the voltage will drop when the camera goes to sleep), and the IC card's microcontroller (μC2) This is to prevent this from happening, since predetermined signal processing (writing control to the E2FROM) cannot be executed.

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

Next, turn the main switches (Sl, l) ON or OFF.
The interrupt (INT2) caused by F will be explained.

First, it is determined in step (11147) whether or not the interrupt is due to the ON of the switch (Sn), and if the interrupt is not due to the ON (IPs=rHJ), the interrupt of (INTO) is prohibited and the display data (#24) is determined. At this time, please set the display (to display all lights off) to #245), and step (#25
At step 0), data communication is performed with the display microcomputer of the display control circuit (DISPC), and the process proceeds to step (#125), where the same processing as described above is performed.

Through data communication, the display 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, in step (#147) the main switch (Sl)
is ONL, in step (#150)
Enable NTO3 interrupts and proceed to the next step (71155
) to set display data (standby display), and perform data communication with the display microcomputer in step (#160). Through this data communication, the display microcontroller is activated as shown in Figure 2 (f).
The display shown in is displayed. In this FIG. 2(f), P mode is selected as the AE mode, no exposure compensation, and single shooting mode.

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

Next, the camera's microcomputer (μC) has a terminal (IPs) of
Is it at "L" level (switch Sεn, 5FLIN,
Sct+, Sc. 6. S, one of them 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 (
OFF) and executes the (S+ON) subroutine described later (#190). Next, another terminal (IPs
) is at the r L J level (#
200). If it is "L" level, step (#20
After setting the card request signal (DSPREQ) to 0 in step 3), proceed to step (1180) and repeat steps (#180) and (#190). If not operated), proceed to step (#205), determine whether or not the power hold flag (OPF) is set, and if set, set the power hold timer in step (#215). Reset start and proceed to the next step (#22
0) to reset the flag (OFF) and step (#2
Proceed to step 35). Even if the power hold flag (OFF) is not set, proceed to step (#235) and
It is determined whether there is a signal requesting repeating the 5M0N loop from the card (CD), and if there is, step (
Return to #190). This is done when setting data, etc.
When the display by the display microcomputer is controlled based on data from the IC card, even though the user wants to see the display, when the camera's 5-second power hold is cut off, the standby display automatically appears. This is done to prevent the display from changing and 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 (#150), from standby display to sleeve control, and on the other hand, if the elapsed time has not elapsed, the flow from step (#190) (C8+ON) 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 [S1] for controlling photometry, AF, and display will be explained with reference to FIG.

First, (INTO) interrupts for this flow are prohibited (#400). This is because if the interrupt (INTO) shown in FIG. 3 occurs during the main control, the control operation will not proceed further. Next, in (#405) the microcomputer (μC)
Set the terminal (PW) of the inverter (IN
+ ) by applying a low level to the base of the PNP transistor (Try).
Try) is turned ON, and power is supplied to the photometry circuit (LM), AF circuit (AFCT), etc. Next, the lens circuit (L
l! Enter information specific to the interchangeable lens from :) (#41
0). This is shown in Figure 10 and explained. First, the terminal (
C3LE) is set to "H" as a bell (#600), and information is input from the lens by performing serial communication as many times as necessary (#605). The circuit inside the lens is shown and explained in Fig. 4(a). 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 (So) is a lens-side switch (see FIG. 4(b)) provided on the lens (10), and since the data must be changed by this switch, the address is also changed. The address set in this way is
Output to OM (8). ROM (8) outputs data based on the specified address. This output is converted into a serial signal by a parallel-to-serial converter circuit (7) and is applied to the camera body.

Next, lens information will be explained. As shown in Table 11, the lens information sent to the camera body includes the lens attachment signal, the lens's open aperture value (Avo), the lens's maximum aperture value (Avmax), the amount of aperture from (1) to close, Focal length information, (lens drive amount/defocus amount) conversion coefficient, ON of the above lens side switch (So), 0FF1
Indicates whether or not to drive the lens (LOK)
), etc., and is input to R4ΔM of the address in the body shown in the table. This signal (LOK) changes from "]" 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 8.
and address structure. (A) and (B) are the same ROM but differ only in the So amount relationship and the LOK relationship.
It stores two similar data in memory. Conventionally, lens information has been relatively small, and a plurality of types of lens information with the same function can be stored in one ROM, and the lens information can be switched depending on the lens used. In this case, the amount of information per lens is fixed, and the required ROM is determined accordingly. In such a case, creating (increasing) new data indicating that the switch is ON or OFF requires two additional steps when data is changed by changing the address in the ROM depending on whether the switch is OH or OFF. This means that a byte (ON, 0FF) is required. If there is room in the ROM, add two bytes, Oh and 08H, as shown in Table 10, and change the address to select 06H and 0814 depending on whether the lens side switch (SQ) is OFF or ON. However, if there is no such margin, as shown in Table 9, in this embodiment, the ROMC provided for multiple types of data other than data to be changed by turning the switch ON or OFF can be stored in (B)]. Same data and switch OF
This can be done by selecting (A) or (B) depending on F and ON. However, in this case, the types of lenses that can be used with this ROM are reduced. For the lenses in Table 9, when the lens side switch (SQ) is OFF, 06H and 0714.08. Either + or O on the other hand
In the case of N, 16n and 17h (bo=o, AF motor stopped) are sent. Note that (XXX) in the address indicates address data that changes depending on the amount of extension of the zoom or focusing lens, and is input from the encoders (3) and (4).

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

For example, when a zoom lens with macro is set to macro mode, AF operation is prohibited at address 07 (1st O).
Table), 08H (Table 9), AF when not in macro mode
Address 09H (Table 10), 07N for operation permission
(Table 9) data is sent.

Now, even when a lens that has the function of the above switch (SQ) is attached to an old camera that does not read this bit (because it is new data), it will also have the function of this lens side switch (SO). (However, since the IC card is not an old camera, the latter two of the changes in function by the IC card - m - selection of focus lock, continuous, and spot AF - m - cannot be performed, and the focus cannot be changed. ), and if the LOK signal is disabled from AF in response to the above switch (So) being turned on, the old camera will still be A.
AF operation is prohibited because the lens cannot perform F.
To perform only focus detection, when the above switch (So) is turned on, B and 10 in Table 9 are selected.
In the table, 07□, 08H, and switch (So) are O.
For FF, A in Table 9, 06) I and 078. in Table 1θ. It is only necessary to change either one of 0GH and 0GH.

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) is set to rLJ level and returns (#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 is determined.

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

This content is shown in the CA4-+CD table (see column ① Communication). Data exchange M(I) is shown in FIG. 5(a). The communication method is almost the same as the data communication (V) shown in Fig. 5(f) above, and the difference is that the communication is carried out as data (I
), and the subsequent data communication (310) 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 (ON) 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.

(DI) is a reverse charge prevention capacitor, (C+) is a large capacity backup capacitor, (μC3)
is a microcomputer that performs sequence control, and (TM) is a detection circuit that detects the width of a pulse indicating the type of serial communication from the camera body and outputs a signal indicating the type of communication to the microcomputer (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 (μC3). (D2) is a rectifier diode, (CM) is a main capacitor that stores energy from the booster circuit, (LEC) is a light emission control circuit that controls light emission, and (DISP) is a display circuit.
As shown in b), this indicates whether the power is ON (signal allows boosting the voltage and communicating data with the camera).
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. (MONT) is a circuit that monitors the amount of light emission itself, and is 1/4 of the total light emission.
When the amount of light emitted is reached, rl(J signal is output. (t, o)
is a normally open switch that switches the light emission amount between 174 and full light emission, and each time the switch is turned on, the light emission is switched to 1740 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 (S,) is operated, the microcomputer (
A signal that changes from "H" (the terminal is pulled up internally) to "L" is input to the microcontroller (40g
) is interrupted, and the microcomputer (/Lct) executes the flowchart shown in FIG. 8(C). In this flowchart, first a flag (O
NF) is set (#5T1
0). When set (ONF = 1), the terminal (Opa) is set to "
"L" level, turn off the ON display and go to sleep (#
5T20 to #5T40), when the above flag (ONF) is not set, the flag (ONF) is set as an operation by turning the power OFF to ON, and the terminal (OF2
) to r HJ level and start boosting (#5T50
．． #5T60). Then, it displays ON (#5T7
0). Next, reset the timer and start 1lsT8
0), waits for 5 minutes to elapse (#5T90), and when 5 minutes have elapsed, proceeds to (#5T20), performs the same control as turning off the power, and goes to sleep.

Next, the interrupt processing (INT+) performed when the camera requests data communication for sending data from the electronic flash device to the camera is shown in FIG. 8(d) and will be described. First, when a pulse width r)(J signal of pulse width (T, ) is sent from the camera, the detection circuit (TM)
) and outputs a signal changing from "L" to "H" level to the (INT+) terminal of the microcomputer (μC3). The microcomputer (μCs) inputs this change signal and
(INT+) interrupt processing.

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

The microcontroller (μC3) first connects the terminal (OPl) to
level, reset the timer, set all timer outputs to "L" level, and do not respond even if a signal is input to the timer (#5TII). Then, set the flag indicating power ON (ON ) is set or not in step (#5T120), and if it is set, the data communication bit (STS+) is set to "
In step (#87140), set the terminal (OF2) to r) (J level and proceed to step (JIST180) in order to start voltage boosting of #5T13. On the other hand, if it is not set, the above bit (STS+ ) and proceed to step (#8T180) (#5T150
). If a signal for canceling the guide number restriction is input from the camera, the process proceeds to step (#5T183), and control for canceling the guide number restriction is performed. When the signal is not input, it is determined whether or not the guide number restriction switch (LO) is turned on.
IP= r LJ) Flag indicating this restriction (LOLMT
F) is set (#5T18
1. #5T182). When set, reset this and set the terminal (OF2) to the "L" level to prohibit the light emission stop signal from the monitor circuit (MONT) from being input to the light emission control circuit (#5T183. #5T1
84).

If the flag (LoLMTF) is not set, set it, set the terminal (OF2) to "H" level to permit light emission limitation, and set communication data (STSg) (#5T186. to #5T187). ), when the switch (LO) is not turned on, step (#8T
190).

Note that this step (#5T190) requires step (#5T190).
It also comes from T184) and (#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 clock (SCK) to be sent. Then, in synchronization with this, communication is controlled to output data through the terminals (S, ut) and the input/output switching circuit (IloCC) (#5T210).
When this is completed, the terminal (OL) is set to the "L" level (#5T220), the above-mentioned timer is reset, and the pulse width from the camera can be detected at any time.

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

The microcomputer (μCa) inputs this to the terminal (IP+) and proceeds from step (#5T230) to (#5T240).

In step (#5T240), the terminal (OPI) is set to r) (J level as described above, and the terminal (I/QC) indicating input/output control is set to "L" level (llsT25).
0), the electronic flash device is controlled to be on the input side. Then, camera data sent from the camera in synchronization with the communication clock (SCK) is input to the terminal (SIN) through the input/output circuit (IloCC), and read into a predetermined register (RAM) (#5T260 . #5T27
0). Then, the terminal (OPI) is set to rLJ level so that it can receive pulses from the camera (
#5T280), whether or not to emit light as input data
Inputs a signal indicating whether to cancel the light emission restriction.

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

In step (llsT330), it is determined whether or not the power is forcibly turned off based on data from the camera. Force O
When it is FF, the microcontroller (μC3) turns off the ON display and
The flag (ONF) indicating power OFF is reset, and the terminal (OF2) is set to "L" level to stop boosting and go to sleep (#5T420 to #5T440).
If it is not forced OFF, the process proceeds to step (#5T340), the timer is reset and started, and it is determined whether 5 minutes have elapsed (#5T350). If 5 minutes have elapsed, proceed to step (#5T420) and perform the same control as forced OFF. If 5 minutes have not elapsed, determine whether or not exposure control has entered #5T360). If there is none, return to step (#5T350) and repeat steps (#5T350) and (#5T380). The signal from the camera indicating that exposure control has entered is a pulse width (T3) signal input through the terminal (ST+). The detection circuit (TM) detects this and connects the terminal (
EC) to "H" level. When this signal is input, the microcomputer (μC3) resets and starts the timer (#5T370), and determines whether or not to emit light from the terminal (O
F2) to rH, Lebel (#5T400), and when no light is emitted, set the terminal (OF2) to the "L" level and proceed to step (#5T412). This step (#
5T412), from the ON of the switch (S2), the movement of the front curtain of the shutter is completed + α (light emission time of the electronic flash device)
After waiting for the time (z150msec), the terminal (OL)
Set it to "L"(#5T415), so that even if an interrupt pulse from the camera comes in, it can be processed as shown in Figure 8 (
Proceed to switch C) (#5T80).

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

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

The signal (C8ST) indicating the type of data communication to the electronic flash device (ST) (the pulse width changes depending on the type), the clock signal (SCK) during communication, and the signal indicating completion of dimming are the OR circuit (OR21). 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 turned OFF by the charging operation during winding)
), and a high level "H" signal is output from the terminal (X?).

(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).

Returning to FIG. 6, the AF mode is determined in step (#417). This AF mode determination subroutine is
Shown in Figure (a). First, it is determined from the lens information whether the above-mentioned lens side switch (So) is turned on (#4000). If this switch is ON, the flag (OPF
), and it is determined whether the card function is ON or OFF based on the 0N10FF signal of the card function input through data communication (■) (described later) (#4007).

If the card function is OFF, the E2FR inside the camera
Based on the OM information, the AF is controlled in the previously stored AF mode.

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

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

The control is the same when determining the AF mode with the E2PROM in the camera and when determining the AF mode with the E2PRON in the custom card, only the data used is different. This is done only when determining the

The microcomputer (μC) reads information from the E2FROM in the camera and determines whether the AF mode is the focus lock mode or not in step (#4010). Here, when in focus lock mode, switch (S,
), set the focus lock bit (Fbts), reset the bit (Fbts) indicating the auxiliary light mode, and if the tracking mode display is on, reset the flag (tracking F) to turn it off ( #4
020 to #403.

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

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

Next, determine whether the AF mode is spot AF (
#4035). This step (#4035) also comes when the focus lock mode is not set in the above step (#4010). In the case of spot AF, it is determined in step (#403B) whether or not the flag (SQONF) indicating that this flow has passed is set for the first time when the switch (So) is turned on. If not, proceed to step (#4037) and change the contents of bit (Fb2) to bit (
Fbts) and reset the above flag (SQONF) #4038), set spot mode in step (#4040) Fbt=1), step (#4045)
Proceed to. If the flag (SQONF) is set, the process skips step (#4037) and proceeds to step (#4045). In step (#4045), it is determined whether or not it is continuous AF, and if it is continuous AF, a bit indicating this (Fbs4
) should be set #4050), and the bit (F
bts) in step ($4055) and return. It is now assumed that the auxiliary light mode for continuous AF is prohibited in consideration of power saving.

With continuous AP, focus adjustment never ends.
This is because if the auxiliary light is emitted every time focus detection (integration) is performed, the battery, which is the power source, will be consumed quickly and the number of films that can be photographed will be reduced. Step (#40
45), if continuous AF is not used, return immediately. In addition, in the flow when the switch (SQ) is on, only one of focus lock, spot AF, or continuous AF is set on the IC card, so for example, step (#40
If the focus is locked in step 10), step (
#4035) and (#4045) are both NO.

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

In this step (#4060), the bit (Fb+4) 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, by moving the contents of bit (b+s) to bit (b2),
Multiple points/spots are obtained before spot AF is selected by the switch (So) (#4070). Then, reset the flag (SQONF) and step (#4087
). In step (#4Q85), the flag (S
QONF) is not set, it is determined whether the IC card (close-up card) is used for forced spot AF, 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 (#40
Skip step 85) 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 (Fbs) indicating this is determined. bit (Fbts) to disable fill light mode by setting
Reset and return (#4088, #408
9) When not forced continuous, one-shot AF should be indicated (reset bit (Fbs) (#4)
090) and return.

After determining the AF mode described above, the microcomputer (μC) performs card data communication (I[) with the IC card (CD) to determine the type of the IC card (CD) ($14
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 to 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 (IV).In particular, the 9th byte is for communication (m).
, the 10th byte indicates communication (■), and this is called a "group designation type". And specify these two methods using the 3rd byte bit (also b) of the 4 bytes above.
By switching between cards and transmitting only the necessary data, the system efficiently saves time. Returning to FIG. 6, it is determined whether or not the AF prohibition data input in communication (n) is set (#425). If it is not set, or if self-timekeeping is not in progress (SLP=0), Determine whether the AF start switch (S+) is ON or not based on the level of the terminal (IPS) (#427). If the above switch (S,) is ON (IPs"' L J
level), controls the AP (#429), and switches (
s+) is set (#430).

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

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

First, in FIG. 14, the outer rectangle (12) indicates the photographing screen. Among them, (LMI) to (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 (AFL ) to (AF3), AF is performed to focus on the subject closest to the camera. Hereinafter, (AFL) is the first island.

(AF2) to ff12 island, (AF3) to 3rd island
Let's call it Island.

To explain the AP control shown in the flowchart of FIG. 12(a), first, in order to detect whether the AF start switch (sl) is pressed for the first time, a flag (S+0NF) is determined and whether it is set or not is determined. If not, the flag indicating focus (AFKF), the flag indicating low contrast scan inhibition (LSI IF), and the flag indicating the start 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
) directly without going through steps (#705) to (#7
Proceed to step 04) and determine whether the lens is attached based on the input signal from the lens (#705)
, If the lens is not attached in step (#705), set a flag (AFNF) indicating that AF is not being performed and return (#8゜O
).

When a lens is attached, forced AF mode (forced AF even if manual focus adjustment is selected)
mode and enables lens drive by motor)
Determine whether or not is selected by the card (#7
07), if in forced AF mode, step (#71)
Proceed to step 1). On the other hand, if it is not the forced AP mode, check whether the focus adjustment mode is AF mode/M mode by checking the terminal (I).
When the AF mode is selected, the bit (Fb+
When the mode is 1M determined by J), the auxiliary light mode is prohibited in step (1798) and (FbI3=
After executing the manual focus subroutine (MFOCUS) in the next step (#799), set the flag (AFNF) indicating that AF is not being performed (#800), and judge whether or not focus is achieved.# 780), if in focus, set the flag (AFEF) $1781)
, 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 (AP2F) indicating the second island among the three islands in the AF area is set, the day focus amount (DF2) of this island is calculated, and this is set as the day focus amount and returned ( #4100 to #4110).

The integral control subroutine in the above step (#4101) is shown in FIG. 12(b) and will be explained. First, when the focus cannot be detected (LCONF=1) or when it is not in the auxiliary light mode (Fb+5=o). , proceed 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) (
$14150-$14160).

In step (#4163), the count (CT) of the feed amount (number of feed pulses) is read and set to (CTI).

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

Returning to FIG. 12(a), if manual focus adjustment is not selected in step ($1710), or if forced AP mode is selected in step (#707), check whether focus lock mode is selected in step (#711). Determine whether

As a result of the determination in steps (#710) and (#711),
In AF mode, if focus lock is selected by the switch (SQ), stop the lens drive in step (#712) and check whether the focus is achieved by checking the flag (AFE).
It is determined whether F) is set #713), and if it is set, proceed to step (#714),
The M focus is controlled and the process proceeds to step (#780). If not set, step ([799)
Proceed to.

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 to be AP, and in the next step (#711), when the focus is not locked (Fb+4=0), step (#71
5), the flag indicating that AF is not being performed (AFNF
), and at the same time, a flag (MFF) indicating manual focus is reset in step (#717). The microcomputer (μC) controls the accumulation (integration) of the charge generated according to the amount of incident light in the distance measuring COD, and after the integration is completed, the integrated value is converted into digital data and the obtained data is input (#72 Then step (#730)
Detect whether it is spot AF or not (detected by Fb2 of the function data). If it is spot AF (Fb2 = 1), proceed to step (#735) and execute the spot AP subroutine shown in FIG. 12(d). Execute. In this subroutine, a flag (AP2F) 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 to drive the lens. Set to day focus amount (#4
102~#4110).

On the other hand, in step (#730) of FIG. 10(a), multiple points A
When F mode is selected, step (#74
0) and executes the normal AF control subroutine shown in FIG. 1(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 flag (APIF - AP3F) according to the island and return (
#810 to #865).

After calculating the day focus amount, it is checked in step (#745) of FIG. If it is low, focus detection is disabled) If focus detection is not possible, proceed to step (#747) to determine whether or not it was in the auxiliary light mode, and if it was in the auxiliary light mode, further focus detection is performed. It is useless to do this, so please set a flag (LCONF) to indicate this.#
752), resets a flag indicating that it is the tracking mode (described later) (#755), and returns. In step (#747), if it is not the auxiliary light mode, proceed to step (#757) to detect whether the brightness is low or not, and if the brightness is not low, it is useless to emit the auxiliary light.
Low contrast scanning, which controls low contrast scanning, refers to performing focus detection while driving the lens to search for a focus detectable area when focus cannot be detected. To explain this as shown in FIG. 12(h), it is determined whether or not a flag (LSIHF) indicating that a focus detectable area was not obtained even though low contrast scanning was performed is set (#4400). ). When it is set, it is useless to perform low contrast scan any more, so return. If not set, it is determined whether a signal indicating prohibition of low contrast scan is input from the card (#4405). If it is input, it returns without performing low contrast scan. If not entered, a flag (LSF
Check whether I) is set or not #4410)
, if it is not set, please set this 9441
5) Set the flag (FWF) indicating the feeding direction (#4420), and set the lens drive amount n to a positive value (K large) larger than the maximum lens feeding amount (#4425).
, to drive the lens to extend.

When the flag (LSFI) is set, it is determined whether the lens has reached the extreme end of extension or the extreme end of extension. If the lens has not come, return is made.

If the lens is stopped, it is determined in step #443 whether or not the lens was extended before the stop (step #444. For this ultimate detection, a hard timer (not shown) is working, and this hard timer It is reset and started every time a pulse from the encoder arrives.When this timer has counted a certain period of time, it detects the extreme end of extension or the extreme end of retraction as a state in which the lens cannot be driven.And if it is extended ( FWF = 1) Reset this #4445), and next time set the lens drive amount to -(K large) to control the renormalization (#44
50), return.

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

On the other hand, if the brightness is low in step (#757) of FIG. 12(a), it is determined in step (1758) whether or not the auxiliary light from the card is prohibited mode, and if it is in the prohibited mode, step (#752) is performed. Proceed to step (#) to disable AP using the auxiliary light.
7f30), the auxiliary light mode (Fb+s:1) is set and the process proceeds to step (#755).

Next, if the microcomputer (μC) is not unable to detect the focus,
The flag (LCONF) should be reset (#762), and step (
If the focus is determined in step #785), set a flag (APRF) indicating the focused state (#767) and set the flag (AFKIF), and proceed to step (#755).

If it is not in focus at step (1765), step (
Step #775) executes a subroutine for lens drive control, and then returns. This subroutine is shown in FIG. 12(e) and will be explained. It is determined whether a flag (following F) indicating the following mode is set (#424
8) If in follow mode, switch (#4330)
If the flag (tracking F) is not set, proceed to One-shot AF (-Once in focus, subsequent lens drive is stopped, and focus detection may also be stopped at this time),
Determine whether continuous AF (follows the subject even after focusing and drives the lens according to the determined day focus amount) based on data (Fbs) (#4250
), in the case of one-shot AF (Fbs=O), check whether the flag (AFEF) indicating focus is set (#4
255), and if it is not set or in the case of continuous AF (Fbs=1), step ($4330) and (#4335) are performed.
14340), and lens drive control is performed. In step (#4330), the flag (AFEF) indicating focus is reset, in step (#4335) the lens drive amount is determined, in step ($14340) the lens is driven, and the process returns. The lens driving in this step (#4340) is performed by the lens driving circuit (LECN) driving the lens by a value corresponding to the driving amount (N).

FIG. 12(g) shows the subroutine for determining the amount of lens drive described above. The microcomputer (μC) determines whether or not the flag (following F) indicating the tracking mode is set (#4341). If not, the process advances to step (#4345); if the flag (following F) is set, the current day focus amount (DF) is set to (DPI) (#4342). Then, find the day focus amount DF: DF+(DF-DF2) (DFa is the previous day focus amount, that is, the difference between the previous and current day focus amounts is added to this time), and (DPI) is (
DF2) and the process proceeds to step (#4345). In step (#4345), the determined day focus amount is multiplied by a value to determine the lens drive amount (N). Read the number of lens extension pulses at that time and set it as (CTs), ΔC
'h Use CTl2 to find ΔCT as the amount of movement of the lens 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).
~(14348).

In step (#4255), when the flag (AFEF) indicating that focus is set, the process proceeds to step (#4257), and it is determined whether or not it is a forced one-shot AP. will return immediately. This prohibits tracking mode during forced one-shot AF. When the tracking mode is the normal one-shot AF mode that is not prohibited, determine whether the flag (AFKIF) indicating when the focus is achieved from an out-of-focus state is set (#4260). First, in step (#4265), the registers (DF2) and (DF3) that memorize the day focus amount are reset.
Store the obtained day focus amount (DF) in the same register (DPI) (#4270), set the variable (N) to O (#4275), reset the above (AFEIF) (#4280), Return. Step (
#4260), after focusing (AFEF=1), when performing the second or subsequent focus detection (AFEIF=O), proceed to step (#4285) and sequentially store the dayfocus amount in the register that stores the dayfocus amount. [The contents of register (DF2) are stored in register (DFz),
Transfer the contents of register (DPI) to register (DF2),
Register the obtained day focus amount (DF) (DPI)
] Add 1 to the variable (N), and this (N) becomes 2.
As described above, after focusing, it is determined whether focus detection has been performed three times,
If the number of times is less than 2, return without driving the lens (#
4285-94305).

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 set based on F), the green LED lights up, and otherwise (focus F=0) 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 a focus detection area; when the inner area (102) is displayed, it indicates spot AP; when only the outer area (102b) is displayed, it indicates multi-point distance measurement. (103) is continuous mode,
Alternatively, it is displayed when the tracking mode is indicated (tracking F.1), and turns off when the mode is not continuous AF or tracking mode. (104) rAF/MJ is AF display when in AF mode (AFNF=0), and otherwise (
AFNF=1) performs M display. In addition, the AF switch (S
l) is OFF (SIOFF=O), the display in the viewfinder is turned off.

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

This is illustrated and explained in FIG. 15. Based on the data input from the card, whether or not the display control mode (data setting) is in progress is determined from the data input in communication (II) #90
5) If the mode is display control mode from the card (during data setting), return. When not in the display control mode, it is determined whether a flag (SLP) indicating that time is being measured in self mode, which indicates that time is being measured in self mode, is set (#907). Returns when set. If it is not set, it is determined whether the exposure mode change switch (SEPl) is turned on (#910), and if it is turned on, it proceeds to the subroutine for this change ($1915) and returns (details will be described later). If the above switch (Sε) is not turned on, proceed to step (#920) and function change switch (
SFUN) is turned on. If this switch (SFLIN) is turned on, the process advances to a subroutine for changing the switch (#925).

Here, the above two subroutines are shown and explained in FIGS. 16 and 18, respectively. First, the exposure mode is changed.
Each time the up switch (Sup) is turned on, the process progresses cyclically from P→A→S→M and then back to P, and each time the down switch (Sdn) is turned on, the process progresses sequentially to P4. -A+-84-M, and after P, it moves cyclically in the opposite direction to the upward direction, but the E2PROM inside the camera
The data or the data in the custom card is changed according to the exposure mode set by the IC card (CD), and unselected modes are skipped.

To explain this with reference to FIG.
) is 0N10 of the card function input in data communication (n)
Based on the FF signal, it is determined whether the card function is ON or not (#1000). If it is not ON, the camera enters control. If it is ON, it is determined whether it is a custom card or not (#1001), and if it is not a custom card, it is determined in step (111002) whether a forced P mode signal is input from the camera, and if it is in forced P mode, it is determined whether the forced P mode signal is input.
As the mode (#1003), if it is not the 0 forced mode to return to, in-camera control is entered to determine the AE mode among the settable AE modes stored in the E2PROM in the camera. On the other hand, if it is a custom card, the data sent via data communication (TV) (EEC8TM
=0.1), 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 E2 FROM, card data), and the selection control is exactly the same, so the explanation will be based on the control performed using the E2 FROM data in the camera. 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) determines whether or not the up switch (Sup) is turned on.
Proceed to.

If it is ON, proceed to step (#1005) and read (Fbo) (Fb) of the RAM function data (Fbn).
+ ) to determine whether P mode is currently selected as the control exposure mode, and if it is selected, proceed to step (#1010) and check whether A mode is selectable or not using the internal E2 PROM. If it is selected, change the exposure mode from P to A (111015), change the function data (Fbo, Fb+) from (0, O) to (0, 1), and return (#1).
015), If it is determined in the above step ($11010) that the A mode is disabled, the process proceeds to step (#1025), where it is determined whether the S mode is selected, and here the 8 mode is selected. If not, the process further advances to step (#1040) to check whether the M mode is selected and to sequentially search for selectable modes. Then, if there is a selectable mode, it is set. And A,
When the S and M modes are not selectable, that is, when only the P mode is selectable, the P mode is selected (#1050).

Similarly, when A mode is currently selected as the control exposure mode (Fbo, Fb+ = 0.1),
Determine whether S mode is selectable, and if not selectable, determine whether M mode is selectable, change the exposure mode to the selectable mode, bit (Fbo), Change (Fb+),
Return ($11020-1030).

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

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

In addition, both switches C3up) (Sdn) are OFF.
If F, do nothing and return.

Next, the control when the function change switch (SFLIN) shown in FIG. 17 is turned on will be explained. The microcomputer (μC) executes the flow after the data change step ($1205). The microcomputer (μC) determines whether the switch (SSE) indicating the function to be changed is turned on (#1205), and if it is turned on, it determines the function to be changed from the bits (Fbe, Fb+o). #122
5), ÷/-→S/C→S/A, and after S/A is +
The data of the bits (Fbe, Fb+o) are changed cyclically by returning to /-.

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
#1280), the function is +
/- mode, use (#1285) to set the exposure compensation amount (△E
0.5 is added to v) and the process proceeds to a subroutine (#1287) that determines its size. This subroutine is shown in FIG. 18, and if the correction amount (ΔEv) is positive, data Fb4. If Fbs=0.1 and negative side correction, data Fb4. Fbs=1,0, and if the correction is zero, no correction is assumed and data Fb4. Fbs=
Return as O, O (#1350 to #1370
).

Returning to FIG. 17, in S/C mode, data (F
bz) to determine whether the current mode is single shooting (S) or continuous shooting, change the data so that it is opposite to the current mode (111295), and return. When it is not in either of the above two modes (+/- mode, S/C mode), that is, when it is in S/A mode, the current mode is Spot A.
Data (Fbe) whether it is F (S) or multi-point AP (A)
Then, change the data (Fbe) so that it is opposite to 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 (6
Except for subtracting 0 and 5 Ev 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 (SFUN) are OFF, the up switch (Sup) and down switch (Sd
The process advances to step (#927) showing a subroutine for changing the aperture value (Av) and shutter speed (Tv) according to n).

This subroutine is shown in FIGS. 22(a) and 22(b). 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 or not, and if it is not turned on, return. When the up switch (Sup) is turned on, the process proceeds from step (#1800) to step (#1810), and 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 next step, and if it is not turned on,
The process advances to step (#1850) to change the shutter speed. First, to explain how to change the shutter speed, in step (#1850) 0.5Ev is added and in step (#1
855). 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 it does not exceed
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, -0, 0), it is determined whether P shift is prohibited or not (#1817), and if it is prohibited, returns. If it is not prohibited, proceed to step (#1830). In step (#1830), 0°5Ev is added to the aperture value (Av), and it is determined whether this exceeds the maximum controllable aperture value (AvmaX) (#1835). If it exceeds the aperture value (A
v) Please set the maximum aperture value (Avmax) #1
840), if it is not exceeded, do nothing and step (#
1845) to determine whether the mode is P mode or not.
If the mode is selected, the process advances to step (#1879) of the flowchart in FIG. 22(b).

Returns if not in P mode. Step (#18
15) and when it is not P mode, (Fbo, +≠0.0
), to determine whether it is in A mode #1820), A
If the mode is (Fbo, Fb+ = 0.0), proceed to step (#1830) and perform up control of the aperture value (Av), and if it is neither, that is, S mode (
Fbo, Fb+ = 1.1) is the step (#182
Proceed to step 3) to increase the shutter speed (Tv).

When the down switch (Sdn) is turned on in step (#1805), step (#1805) in FIG.
1865), determines whether the mode is M mode, and
mode (Fbo, Fb+ = 1.O)
, determine whether the aperture change switch (SQυ) is ON (#1877); if it is ON, proceed to step (#1885) to change the aperture; if not, proceed to step (#1905) to change the shutter speed. ). Step (#1905) subtracts 0.5Ev from the set shutter speed and determines whether this is slower than the camera's minimum shutter speed (Tvmin) #1
907), if slow, limit the shutter speed to the lowest shutter speed #1908), otherwise return without doing anything. When the aperture change mode is determined in step (#1877) (SauON), step (#1885) subtracts 0.5Ev as a reduction in the aperture aperture (Av), and then subtracts that value in step (#1890). 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 control flow for increasing the aperture value (#1850 to #1860) shown in FIG.

In step (#1865), if the mode is not M mode, it is determined in step (#1870) whether or not the mode is P mode. Here, when in P mode (Fbo, +:
0. O), determine whether P shift is prohibited or not (#1872), and if prohibited, return. If it is not prohibited, proceed to step (#1885). When step (#1870) is not in P mode (Fbo, 1≠0.0), step (11187
Proceed to step 5) to determine whether the mode is A, and if it is the A mode, proceed to the flow for controlling the aperture reduction after step (#1885); otherwise, it is determined that the mode is S and step (# 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 (SSELF) is turned on. When OFF (IP+2: r HJ
) returns immediately.

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

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

In FIG. 20, the microcomputer (μC) first determines in step (#1600) whether or not a flag (AELF) indicating the AE flock is set, and then
LF) 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. #161
of.

Through this communication, the brightness values (Bv, to Bv4) of the four photometric ranges shown in FIG. 14 are input. When communication is completed, set the terminal (C8LM) to "L" level (#1615)
, Then, in step (#1617), BvcG:B
Enter the value of v2 and set BU11υ in step (#1618)
ε to (#1622), it is determined whether a flag (AFNF) indicating that the camera is not in AF mode is set, and further, a flag (LCONF) indicating that focus detection is not possible is set in step (#1624). If either one is set, the process proceeds to step (#1660) and the small photometric range (LM2) at the center is set as the spot value (Bvsp). When the 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), it is determined whether this image magnification β is greater than or equal to a predetermined value (K), and the size of the subject occupying the photographic screen is determined. If it is greater than or equal to the predetermined value, it is assumed that the subject is large, and in step (#1640) each photometry node [1 (
Luminance values (B
Let the average of v+ ), (BV2), and (Bva) be the spot photometric value (Bvsp).

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, which flag (AFIF-AP
3F) is set, and if the flag (AFIF) is set, the brightness value (Bv+) of the photometry range (LMI) and the flag (AF2F) are determined.
is set, the brightness value (BV2) of the photometry range (LM2), and when neither flag is set, that is, the day focus amount of the third island (AFs) is selected, the photometry range (LM3) brightness value (
BV3) respectively as spot photometric values (Bvsp) (#
1645~#1665).

After determining the spot photometry value in this way, the microcontroller (
μC) proceeds to step (#450) in FIG. 6 to control the AE flock, which will be explained with reference to the flowchart shown in FIG.
#1740) AE floc switch (S, εL)
Determine whether or not it is turned on, and if it is not turned on, reset the flag (AELF) (#1755)
, When it is ON, set the flag (AELF) (#1745) and the timer (T1) to maintain the power supply.
Start resetting (#1750) and set the spot photometry value BV2 as the spot value (Bvsp) (#1752)
Return. In this way, the AE floc switch (SII
When the EL) 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 the presence/absence of communication (I Returns when there is nothing.

It is empty when no card is installed. Communication (I[
If there is [), set the terminal (C3CD) to r) (J level #350), set the data (#352), and output the data to the IC card (CD) (#355).

Next, communicate once (#357) and wait (#3
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 specified (1362-1).

In case of group designation (sports card, snap card, etc.), group designation Go, GI, G2. G
, controls the output of group data to the card.

First, set the address for group Go #362-2
), serial communication is performed 15 times (#362-3).

GO, Gl, G2. G3 data is lens drive and AE
With the data for calculation, r-Tvc... Control shutter speed ■Avc・
. . . Control aperture value G3Lpmax . . . Lens maximum extension amount and then group G. Whether or not data is necessary is determined based on the data obtained in communication (n) (#362-4). Return if not needed. If necessary, the address G of the GI data
, and perform serial communication three times (#362-6). Next, determine whether the data in G2 is necessary, and if necessary, set address G2,
Perform serial communication twice. Next, it is determined whether data 03 is necessary, and if so, address G3 is set, serial communication is performed once, and the process returns. If the group is not specified, please set the address based on the address with the necessary data entered from the card #362-7
), serial communications are performed for the number of serial communications input from the card (#362-8). Furthermore, communication (I[I)
There is no addressing type in .

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

The flow of this control is shown and explained in Figs. 23 to 27. In Fig. 23, the microcomputer (μC) first turns on the light emission signal, which is the output data to the electronic flash device, by forcing 19 ON and 0.
9 Forced 0FF=O, GN control release: Initialize to 0φ(
#2000 to #2003). Next, step (#200
In step 4), it is determined whether the lens is attached or not based on the input lens data, and if it is not attached, the photometry value (BvIIn) of the photometry range (LM4) (
Instead, add the film sensitivity (Sv) and exposure compensation value (△Ev) to the overall averaged photometric value,
Calculate the shutter speed and return (#2005).

If a lens is attached, determine whether it is forced P mode based on the data input from the card #2006)
, in forced P mode, returns without performing exposure calculation. If it is not the forced mode, exposure calculations are performed according to each exposure mode (#2010 to #204).

Therefore, the exposure calculation for P mode is shown in Fig. 24 (a) to (c).
To explain it as shown in the figure, the microcomputer (μC) first
In step (#2100) of Figure (a), the backlight condition is determined using the photometric value (BVAM) of the photometric range (LM4) and the spot photometric value (Bvsp) obtained in step (#445).
Judgment is made based on whether the difference is 2Ev or more (#210
0). If it is 2Ev or more, it is determined in step (#2105) whether an electronic flash device is installed (switch Sn of the electronic flash device is ON), and if it is installed, the control exposure value (Ev) is set. Photometric value (B) of photometric range (LM4)
yon) etc., Ev = BVaM+ Avo+5v-1
Calculate by +ΔEv (#2115). Here, the reason for subtracting 1 is to make the background appear to be backlit by IEv. In addition, I am trying to properly expose the main subject using a flash from an electronic flash device.

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

The program I is shown in FIG. 24(b) and explained as follows.
Tuning the shutter speed control value (Tvc) = 7
(33 = 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 GN restriction of the electronic flash device (#2235)
At the same time, a light emission signal is set (#2240), and the process returns. This is because the aperture is retracted and the GN
This is because if you limit the main subject, it may not be possible to photograph the main subject properly with strobe light.
It also takes into account that the photographer has little intention.

Returning to FIG. 24(a), in step (#2105), if the electronic flash device (FL) is not installed, the control exposure value (Ev) is set to the spot value in the photometry range in order to properly expose the main subject. (Bvsp) etc., Ev = Bvs
Find p+ Avo+Sv+△Ev (#2130), proceed to the program ■ subroutine (#2135) to find the aperture value (Av), and shutter speed (Tv), and proceed to step (
Return after $12,170).

This subroutine is shown and explained in FIG. 24(C).
First, in step (#2250), set the aperture value (Av) to Av=
This aperture value (Av
) is larger than the maximum aperture value (Avmax) of the lens (#2255), and if so, the maximum aperture value (Av+aax) is set as the control aperture value (Avc) (#2255).
Proceed to step 226 (#2280). Step (
#2255), the aperture value (Av) is the maximum aperture value (A
vmax) or less, the aperture value (Av) is equal to the open aperture value (
Av.

), and if it is smaller, the open aperture value (Avo) is set as the control aperture value (Avc), and if it is not smaller, the calculated aperture value (Av) is set as the control aperture value (Avc). ) ($12265~#227
5).

In step (#2280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). In the next step (#2285), it is determined whether this is greater than the maximum shutter speed (Tvmax), and if it is, the control aperture value (Avc) is Shutter speed (Tvc) (
Tvmax) (#2290), if it is not larger, then in step (#2292) it is determined whether or not it is slower than the slowest shutter speed (Tvmin), and if it is slower, (Tvmin) is controlled. Toshiku #2
293), if not slow, calculate shutter speed (Tv)
Control shutter speed (Tvc) (82295),
Reset the light emission signal (=0) to prohibit light emission (#2
298), return.

Returning to FIG. 24(a), in step (#2100), when the Buan-Bvsp difference is less than 2, it is determined that there is no backlight condition and the process proceeds to step (#2145), and the average of the photometry range (LM+) to (LM4) is Photometric value (Bv+ + B
V2 + BV3 + Ev4)/4 to exposure value (E
v), determine the aperture value (Av) and shutter speed (Tv) using the above program ■ (112150), and set the shutter speed (Tv) to the camera shake warning speed (Tv=
6.1760) (#215
5). Then, when the speed is less than the camera shake warning speed, it is determined whether or not an electronic flash device is attached (12160);
If it is attached, execute strobe light emission program (#2165) and return.

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

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

Next, the control in S mode is shown in FIG. 26 and explained. First, in step (712400), the exposure value (H
v) 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
Determine whether it is larger than the maximum aperture value (Avmax) (#2445), and if it is larger than the maximum aperture value (Avmax).
) as the control aperture value (Avc) #2450), and if it is not larger, set the calculated aperture value (Av) as the control aperture value (Avc)
(#2455) and return.

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

Next, when in M mode (see Figure 27), step (
The aperture value (Av) preset in #2515) is set to the control aperture value (Avc), and the aperture value (Av) set in advance in the next step (li2520) is changed to the control aperture value (Avc).
Control the shutter speed (Tv) with Shutter speed (Tv
Return as c).

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

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

FIG. 5(d) shows a flowchart of this control. First, it is determined whether communication (IV) is necessary or not.
), and if it is not necessary, return. If necessary, connect terminal (C3CD) to r) (J
level (1367), performs serial communication with the IC card (CD) (#375), and notifies the IC card that the IC card is on the output side. At this point, 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
), and when this data communication is completed, the terminal (C8CD) is set to “L”.
' level and return.

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

When specifying a group, each communication number (Go
, G+, G2), the address of the input register in the camera is set, and serial communication is performed 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;

(i i) Bracket card, H/S card ΔAv...
.... Aperture shift amount ΔTv ..... Shutter speed shift will be explained when specifying a group for setting fire.

Go... Display data during setting... 9 serial communications G2... ΔLp... Lens °
Return to drive... One serial communication Return to Figure 6 When the data communication (IV) with the card is completed, the microcomputer (μC) outputs data to the electronic flash device (ST)6 (#467), To explain this as shown in No. 11 rxJ (b), the microcomputer (μC) first determines whether the card function is ON based on the data input from the card #467-1), If not ON, step (#4
6710). When it is ON, it is forced ON or forced O based on the electronic flash device control signal input from the card.
FF, GN restriction release 2 emission steps (#46
7-2) (4 to 1467) (#467-6) (#
467-8) and the control signals indicate forced ON, forced OFF, GN restriction release, and non-emission, respectively.
Step them (#467-3), (#467-5
).

(1487-7), (#476-9), and if the above four are not shown, (#487-3'
), (#467-5'), (#467-1'
) (#467-9") to reset the respective signals and proceed to step (#487-10). Step (#467-1
0), the terminal (C8FL) is held for a certain period of time (T2)'HJ
level, indicating that the camera is in data output mode to the electronic flash device.
loCG) is set as the output side (rHJ), waits for predetermined processing within the electronic flash device, and then performs serial communication once (#467-11 to #467-13).

When data communication with this electronic flash device is completed in Figure 6,
The microcomputer (μC) executes the card control flow of step ($1470). Based on the data you entered, this flow will
This figure shows how to determine whether or not to control the camera using
Based on the data input from the C card, it is determined in step (#2610) whether or not the camera can be 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, the control aperture value (Avc), control shutter speed (Tvc), and film sensitivity (Sv) are each determined by the data input from the IC card (#2615 to #2630).

If the above data is not (Av) or (Tv) data,
It is determined whether the data is (ΔAv) and (ΔTv) (#2635). and (ΔAv), (ΔTv)
If the data is not, return. (ΔAv), (Δ
Tv) data, the control aperture value (Avc) is set to (Δ
Av) and (
ΔTv) is added, (ΔSv) is added to the film sensitivity (Sv), and the process returns (#2640 to #2650).

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 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.

AE 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 the data of b4 to b6.

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

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

Card display...b+, ba (address DP6N) are the data for turning on and off the exposure compensation +/- display, bs, be (address DPa14)
) controls the selection of single shooting/continuous shooting and turning off the display, bo,
b+ (address DP7N) is control data for flashing, lighting, and turning off the card display, ba, bSc address DPyII
) respectively indicate multi-point AF/spot AF switching display and light-off control.

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

Control data: Data indicating the camera sequence, bo: All lights off (main switch 0FF) bl...
・Stand on (main switch ON, S+ 0
FF) ba...Card display ba...Initial load b4...S+ 0N b5...Rewinding LED Infinitor" -Display-bo...Focus display presence/absence bl...Focus Presence/absence of undetectable 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 r)IJ from SP) is input, the interrupt shown in Figure 29(b) is executed, and 11 bytes of display data from the camera (see Table 5) are serially communicated. Go and input (#D-5). Determine whether or not the mode is all off from the input control data #D-
10), when the mode is all lights out (DPeH, bo; l
), all lights are turned off without displaying anything (#D-15),
If it is not in all-lights-off mode (DPeH, bo = 0), determine whether it is in standby mode #D-20), if it is in standby mode (DP++n, b+ = 1
), display the currently set AE mode on the DP311.
Display based on bo, b+ (#D-25),
026M, DP? The card is displayed based on the information of H, the position of the cursor (Δ) is displayed based on the data of data change display of DPsn, and the other lights are turned off. That-
An example is shown in FIG. 29(c). Figure 29(c) shows P mode, card function cloth, △ mark (cursor) at the exposure compensation position,
It shows the display of exposure compensation mode, single shooting mode, and multi-point AP.

If it is not the standby mode in the step (IID-20), it is determined whether it is the initial load (#
D-45). When it is the initial load (DPIIN
, bs; 1), displays only the film number display (DPsH), and the Batkan Pero display, and turns off the other lights (
#D-50 to #D-6. Figure 129 (d) shows that the film is loaded and is at initial load during 0 rewinding (also for DP9H2b; 1), and the "-" display in Figure 29 (d) indicates that the film is being rewinded at that time. Indicates the number of films.

When not rewinding, determine whether a card is displayed (#
D-70), when the card is displayed (DPsH,ba=
1), Decode the DPIH data and display the card name, display the numerical value based on the DP2H data, DP3)
1, b2 to b6 are used to display what is selected (selected) by the IC card, and further, numerical display is performed based on the data of DP4H, and card display is controlled based on bo and b+ of DPy+. (#D-75~#D-95
), the display of this card will be explained in detail later. If it is determined in step (#D-70) that it is not the card display mode, proceed to step (#D-105) and switch (S).
l) is turned on, and if it is turned on, the in-finder display is performed based on the in-finder information (#D-11, if it is not turned on, the in-finder display is performed) First, they each proceed to step (#D-115).

After that, the shutter speed (SS) is displayed based on the DPIH information, and the aperture value is displayed based on the DP214 information.
Display of AE mode based on ba, b+ of DP2H,
Display of film number based on DP3H, button display based on DP4H, card related display based on DPeH+v+ information, data change (Δ) display based on DPIIH information Dh□ be, by, DPIO
The AF mode and self are displayed based on the bo of H (#D-115 to #D-155). An example of this is shown in FIG. 29(a), which shows a flowchart of display control (display data creation) on the camera side. First, step (#
2700), it is determined whether or not it is card display control based on the data obtained in the communication (n) with the card, and if it is card display control, the mode is set to output the information input from the card as is, Perform serial communication 12 times ($
12705-2730). On the other hand, when not controlling the card display, serial communication is performed 12 times (#2710) to output data created by the camera (shutter speed, aperture value, number of films, etc. - see Figure 29 (e)). #2720). 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, and if the card side has the control authority, the camera shake warning signal is sent from the card. It is determined whether or not there is (#2740). If it is a camera shake warning, a buzzer warning is issued (#2745) regardless of whether or not there is a buzzer warning by the custom card, and step (#2
Proceed to step (#2765) 0 If the camera shake warning is not issued, the process proceeds to step (#2765) without issuing a buzzer warning. If the card does not have buzzer control authority, determine whether the shutter speed determined by the camera is less than 6 (#2750); if not, proceed to step (#2765); if less than 6, the card function It is determined based on the data input in communication (n) whether it is ON, and if it is not ON, it is determined whether there is a buzzer warning based on the data in the E2PROM in the camera (#2754), and if it is, a buzzer warning is issued. If there is no buzzer warning, step (
Proceed to #2765).

If the card function is ON, determine whether it is a custom card (#2758) L. If it is not a custom card, proceed to camera control and perform the control described above. If it is a custom card, from the card Determine whether or not there is a buzzer based on the input communication (IV) data #2760), and if so, issue a buzzer warning #275
6), 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 to RON,
Write data from custom card in communication (TV) when it is (#2770), step (#277
Proceed to 5). When there is no write control signal, skip step (#2770) and proceed to step (#2775)
Proceed to.

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

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

Now, in the flow of Fig. 29(f), the microcomputer (μC
), first check E2 to see if the settable exposure mode has been changed.
Compare the 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, 0) #3205) and return.

When the display control (#471) described above in FIG. 1) Determine whether 10 seconds have passed (#
474). If 10 seconds have elapsed, the process proceeds to step (#490) to perform exposure control; if 10 seconds have not elapsed, the process returns to step (1180). When self-timekeeping is not in progress (SLP=0), the process advances to step (#473) to determine whether or not the release switch (S2) is turned on, and when it is not turned on (Ih=' HJ
), proceed to step (#520), permit all interrupts, and return.

When it is ON (IP7=rLJ), it is determined whether or not the release prohibition data obtained in communication (II) is set (#475), and if it is set, step (#520) is performed. On the other hand, if it is not set, it is determined whether the self mode is selected (1476), and if it is not selected (SEL
FF=0), proceed to step (1481).

When selected (SELFF = 1), set the flag (SLP) indicating self-timekeeping (#477) and reset and start the timer (separate from power hold) (
1478). Then, in order to maintain the power supply, a flag (OF
F) should be set #479), AE floater flag (Ag
LF) is set (#48), the measured value is fixed, and the process proceeds to step (1180).

Step (1481) to proceed to (IPl = r) ('') when not in self mode in step (#475) of Figure 6
Now, in manual focus mode (MFF=1 (
Manual focus adjustment (focus lock or focus detection only)
], and if it is manual focus mode, proceed to step (#490). If not manual focus mode, proceed to step (#485). Step (#485) indicates focus. Flag (A
FEF) is set, and if it is not set, the process returns through step (#520). If it is set, proceed to step (#490) to disable all interrupts in the same way as when not in AP mode, and then proceed to step (#492) to communicate (V) with the card. It is shown and explained in FIG. 5(e).

First, the microcomputer (μC) determines the presence/absence of communication (V), returns if there is no communication, and returns to the terminal (C8C) if it exists.
Set D) to r) (J level (#390) and communicate (V)
Set the data indicating that it is (#391), set the camera side as an output (#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 #39
4), set the camera side as input #385), perform serial exchange 8 times (#396), and connect the terminal (C8CD) to r L
Set it to J level (#397) and return. This data is data for the memory card memory.

Here, the data contents are shown and explained in the CAM CD table.
(i) Number of film sheets (ii) Open FNO (iii) Control F value (iv) Control shutter speed (v) Exposure compensation value (vi) Exposure mode (vii) Exposure mode (viii) Film sensitivity, communication (V) After finishing, the microcomputer (μC) proceeds to step (#495) and performs exposure control (described later), and then winds the film one frame in the post-screening step (#500) (this will also be described later). Release switch (S
2) is ON or not in step (#505), and
If N (IP?=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 the continuous shooting mode is selected, and if the continuous shooting mode is selected (Fba
-1) In step (11515), all interrupts are enabled and the routine proceeds to (SO). When not in continuous shooting mode (F
b3=O) returns to step (#505) and waits for the release switch (S2) to be turned off. When it is turned off, all interrupts are enabled in step (#520) and the process returns.

Next, the exposure control subroutine of step (#495) is shown in FIG. 30(a) and will be described. First step (1
At step 2805), the terminal (C8ST) is set to r) (J level during (t3)) to indicate to the electronic flash device (ST) that it is in exposure mode.

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

In the next step (#2815), the control aperture value (Avc
) to perform aperture control and start mirror up. Next, the lens is driven during release, and this is the 30th
As shown in Figure (b), first it is determined whether the card function is ON or not (#2822-0), and if it is ON, there is a snap drive bit signal input from the IC card indicating lens drive during release. Step (#2822-
If it is determined in step 1) that there is no signal indicating the card function OFF or snap drive, proceed to step (#2822-4) and wait for the mirror up to be completed, and when the mirror up is completed (IP20'' L J ) Return. If there is the above signal, drive the lens by the amount of lens drive (Δn) input from the card (#2822-3), stop the lens (#2822-4), and wait for the mirror up to be completed ( #2822-5), returns when mirror up is completed (IP2o: "L").

Next, returning to FIG. 30(a), the shutter speed is controlled (#2825), and the [lens drive REL]
n control] (#2830) and return. To explain this as shown in FIG. 30(C), first it is determined whether the card function is ON or not (12830-0), and if it is OFF, the process returns.

If it is ON, determine whether there is a snap drive bit signal or not (#2830-1), and if there is, the reverse signal (-
Δn) (#2830-2), stop the lens (#2822-4), and return. When there is no signal of the above bit, it is determined whether a defocusing card is inserted (#2830-5). Returns if it is not a defocusing card. If it is a deforming force card, the count pulse number (CWT) 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), Reset and start the timer for measuring exposure time (#2838), start running the first act (not shown) (#2837), and determine whether the card function is ON or not (#2838), if it is OFF. , flow to wait for exposure time (T) to elapse (#2846)
Move to. On the other hand, if it is ON, it is determined whether or not it is a defocusing card (#2839). If it is a defocusing card, the pulse current at the current position of the lens is set as CT' and memory L (#2840), and the exposure time (
T)? /4 (12841). ? /4, the driving direction must be detected from the information of (ΔLp) input from the card to the far side or the near side (12842), the direction is set accordingly, and the lens is driven at the highest speed (#2
845). At this time, the counter that monitors the lens extension position is still operating. At this time, or when there is no defocusing card, the exposure time (T)
(#2846), and if it becomes T, start the second act (not shown) running (112847), wait for the time when the running is expected to be completed (#2848), and stop the lens drive motor. (#2849) and return.

FIGS. 31(a) and (b) show the steps (#) in FIG.
500) is a flowchart of the control for winding one frame of the film shown in FIG. To explain this, in Fig. 31(a), the microcomputer (μC) outputs a motor hoisting signal to the motor control circuit (MD), and the timer (T3
) (#2850. #285
5).

This timer winds the film to the last frame,
This is a timer to detect when the film is stretched. The microcomputer (μC) switches the switches (Sl, I) to indicate that one frame has been wound in step (#2860).
Determine whether or not n) is ON, and if not, check whether 2 seconds have passed in this state (#2865)
If 2 seconds have passed, the motor is controlled to stop (#2870), and if the film is considered to be tight, the film is controlled to be tight (#2875).
Next, set the cancel signal to 1 to cancel bracketing or auto shift that is continuous shooting #2876
), performs data communication I (#2877), and returns. The above-mentioned subroutine is shown in FIG. 31(b) and will be explained. A signal to reverse the motor is output (#2
930) and the film detection switch (Sp) is set to O.
Wait until it becomes FF (#2935), and turn the switch to OFF.
When it becomes FF, in order to roll the film into the patrone room,
After performing motor stop control (12955), return.

Returning to FIG. 31(a), when the one-frame hoisting completion switch (SwoON) is turned on in step (#2860), the motor is stopped in step (#2880), and then the motor is stopped in step (#2890). ), the count number (N1) of the counter indicating the number of completed film shots is incremented by 1, and the process proceeds to step (#2900). In step (#2900), this number of films (N1) is written into the E2 PROM.

Next, when the back cover close detection switch (SRC) or the rewind switch (Saw) is operated, the terminal (INT2
), the microcomputer (μC) executes the interrupt (INT2) shown in FIG. In the flow shown in the same figure, the microcomputer (μC) first prohibits interrupts to this flow in step #300, and then in step #3
005), it is detected whether the rewind switch (S++w) is turned on. If it is turned ON, the rewind operation shown in FIG. 31(b) is performed to perform the rewind operation.
Execute the routine, enable interrupts, and return (
#3010). When the rewind switch (SaW) is not turned on, it is assumed that the camera back closing switch (SiD) is turned on, and the cancel signal (used in data communication 1) is set to 0 to restore the bracket function or auto shift function.
(#3012) and proceed to step (#3015).
Determine whether film is present. If there is no film, therefore, the film detection switch (Sp) is turned OFF.
In case of F, step (#
3100); on the other hand, if a film is present (i.e., SFLM is 0N(7)), proceed to terminal (C3
DX) to “H” level, and the film sensitivity reading circuit (
DX) and transmits film sensitivity data (S
v) and the number of film shots (N), and after completing the communication, connect the terminal (C8DX) to r L "L/ /< h
Nit 6 (#3020-#3030). And the number (
N1) should be set to -2 (#3035), then terminal (
C3DISP) is set to r) (J level, performs serial communication with the display control circuit (#3045), outputs a signal indicating initial load (DPQII b3 = 1) and data on the number of films, and thereby the number of films (N1 ).When serial communication is finished, the terminal (C3DISP) is set to "L" level (#3050).This number of films (Ml
), the display is displayed using two 7-segments. Next, the microcomputer (μC) outputs a signal indicating motor winding to the winding control circuit (#3055), waits for one frame to be wound (#3060), and when the one-frame winding switch (SuD) is turned on, the number of films ( Add 1 to N and judge whether it becomes 1 or not. If it is not 1, go back to step (#3040). If it is 1, go to step (#3075) and start the motor. Stop and proceed to step (#3095). In step (#3095), the number of films (N,) and film sensitivity are written to the specified address of E2FROM, and after writing is completed, all interrupts are enabled. (#3100)
, 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. The IC card (CD) has a built-in microcomputer (μC2) with a built-in E2 PROM.

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

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

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

Reset all registers (RAM) (0-5) and go to sleep.

Next, connect the camera to the auto depth card terminal (CSCD)
When a signal changing from "L" to "H" is sent to the auto-depth card, the auto-depth card executes the interrupt shown in FIG.

Here, the auto-depth card synchronizes with the clock sent from the camera and performs serial communication once to input data indicating the type of communication (0-15). Based on the data from this communication, the type is determined. If it is communication (1), set the card to the data input side and set it to 0-20).
25) Perform serial communication (0-30) to receive data (see CA-CD table) from the camera. 0-3 Execute the data setting subroutine based on this data.
5) Sleep.

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

In communication (II): ・FL forced ON C3n-1-b
.

・GN restriction release (・1) C5ll-1-
CS whether or not the card performs bs/display control ■-1-b
.

・Card function 0N10FF CS ll-
1-bs snap drive bit C5ll-1
-bi/shake buzzer presence/absence cs n-t-
bF/P shift prohibited (・1) CS n
-2-be・Forced P mode (=l) C5
ll-2-bi・Noth V communication (・0)
CS If-2-b low/AF Rawanhot (-1)
C5ll-2-bi・Forced A F (-1)
C5n-3-b.

'Tv' Ay/display data C5■-3-
bz・Communication (rV) Yes (・l) C5ll
-3-b4・Communication (1) Yes (=1) CS
II-3-bs・Group specification (・O)
C3ll-3-b.

・Photometering loop repetition CS ll-3-by
- Hand shake buzzer system? II (・1) C5■-4
-b.

Note that AF raw shot here refers to prohibiting the tracking mode after focusing on the camera side, and the camera side prohibits the tracking mode by inputting this signal (
(On the camera side, this is called a forced one-shot.)

All signals other than the above are set to "0", and the * marks in the table are set to "1" or "0" depending on the situation, and when it is "1", the control is ON, and when rQ, it is OFF. For those that are fixed, 'OJ, rl' is determined. In communication (II), in order to specify group GO+Gl of communication (Ill) in group communication of communication (IV), C5II-9-(bO,bl)-1,1, communication (I
V) consists of display control data and lens drive data, so C3lI-10-bi, bz, bs=1.1.1
．． Otherwise, mark "O".

Any data can be stored in the blank areas.

In the communication (Vl), a sleep permission signal is sent.

The data setting subroutine is shown in FIG. 35(a) and will be explained. First, in step (0-150), display control data is initialized to "0", and in the next step (0-160), communication (1) is set. I got DISRII! Determine whether the Q (request for card name display) signal is "1" and set it to "1".
If so, set the display control data to "1" and set the card display function 0N10FF to 0N (1) (0-170.
0-175) 0 Next, in step (0-200) it is determined whether the flag (SIF) is set, and if it is not set, this flow is passed for the first time.
Set this flag (SIF) (0-205), reset and start the timer (0-210), and proceed to step (O-215). In step (Q-215), it is determined whether or not the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, set the photometry loop repeat signal ``rl'', card display name, and data to only display the card (0-222).
Return. This display is shown in FIG. On the other hand, 10
When seconds have elapsed, the photometry loop repetition signal is set to "0", the flag (SIF) is reset (0-226), the display control data is set to r□ (0-227), and the process returns. When old 5REQ = O in step (0-160), rps = rL, J (i.e., switch SUN +
5FIIN + sea + 5ees l sl (0-162)
, "L", reset the display flag (display F) indicating control to display the card name (0-163), rL, proceed to step (0-165) without doing anything, and reset the flag (SIF). ) to reset. After that,
Proceeding to step (0-260) in FIG. 35(b), it is determined whether the self signal obtained in communication (n) is "1" or not.

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

When the self signal is not "1", the process proceeds to step (0-430) in FIG.
When Sco) is OFF, this flag (SC11F) should be reset (0-460), and then it should be determined whether the display flag (display F) is set or not (0-465).
, returns when not set. When it is set, the process advances to step (0-170) and the display of the card name is controlled.

When the card switch (See) is ON in step (0-430), a flag (SCI,
Step (0-435) determines whether or not F) is set.
), and if it is set, it is assumed that the switch continues to be operated and the process proceeds to step (0-465).If it is not set, it is determined to be reset (0-440).
), it is determined in the next step (0-445) whether the card function is currently ON, and if it is ON, it is set to OFF (communication (If) data) (0-45).
0) Return. If it is OFF, turn this on
(communication (If) data) and step (0-17
Proceed to step 0) to control the card name display.

Returning to Fig. 34, when it is not communication (1), communication (If)
0-40), and when communication (It), set the card as the output side to output the data set above to the camera, perform serial communication 10 times, and then perform serial communication (0-40).
50), sleep.

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

If it is not communication (II[), check whether it is communication (IV) or not (0-55), and if it is communication (IV), set the card as the output side (0-60), and check whether it is display control or not. If it is determined to be 0-65) and display control is being performed, display data is output (0-70), the address is set, serial communication is performed nine times (0-75), and sleep is performed.

When not display control (Tv, Ay data), Tv, A
Specify the data address of v, perform serial communication five times (0-85), and go to sleep. If it is not communication (■), it is assumed that communication is (VT), and first, serial communication is performed in accordance with the clock from the camera (0-125) using the data card as the output side, and the device goes to sleep.

Next, FIG. 36(a)(6) shows a flowchart for performing AE (exposure) calculation for the auto-depth card, and will be briefly described.

First, FLGO inputs whether it is in focus or not through communication (n)
It is determined whether or not (beep) (be) is "l". If it is not in focus (b, =O), the depth aperture (AVDEP) is set to the shallowest open F-number (AV.) and the process proceeds to O.

This is because this card focuses on both the subject position and the background, so this information cannot be obtained unless the subject position is in focus. For this reason, if you consider the maximum aperture value that indicates the shallowest depth, and place the subject in front of this depth (on the camera side), the subject will be in focus no matter what aperture value you use. This is because they match. When in focus (bO”'1), 2K
It is calculated by EL・α・0 (α・δ are constants related to depth). This F value is an aperture value for covering the depth from the ψ position at a position that is half of the current feed-out amount (Lp) from the ■ position.

Set this to the apex value AVDEP (0).

In step 2, the aperture value is calculated to satisfy the depth from the current lens position to the (g) position.

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

t and p are 0 at infinity and increase in value as the distance gets closer. At infinity, there is a considerable depth of field, so there is no need to shift the lens, so set F=0. As the subject gets closer, the lens must move more to capture the background, so the F number increases. AVDEP sought
However, the maximum aperture value (
Avatax) or more, the limit value is set to AVD or AVs□.

In step 0, a reference value (Tvf) of shutter speed is calculated in order to sound a buzzer to warn of camera shake. Lenses with long focal lengths tend to cause camera shake, so (T
vt) becomes faster (see Figure 38)
.

zFz-16XIogzf150+56 (f: lens focal length (an)) When the shutter speed is faster than a certain point (TVF>8
) TVF・8 to prevent camera shake from sounding the buzzer.
shall be.

When the flash switch is not ON and the spot key is ON (AEL 1), the exposure value Ev is calculated from the spot brightness (BVc) (BVz brightness).
ff, or when the spot key is turned off (AE
L・0), brightness (aVS) --- Main subject brightness ---
The exposure value Evs is calculated from the following.

Then, the maximum aperture value (AV, , ), minimum (AV, ,
, or Avo), maximum shutter speed (TV, □)
, minimum (TV, i, ), the Evs obtained above exceeds the control limit (AV@@X+ TVaax, or AVo
+TVsta), set to the above limit value,
Proceed to camera shake detection. When within the above limit range, ^C Av
If the shutter speed when set to o is less than camera shake (TVF), TV -Evs -Avo, TVc a
Set TV, AVc = AVo, and proceed to camera shake detection. However, when the TV exceeds the camera shake (TVF), in O, when Evs > Avoz + Tvt, priority is given to avoiding camera shake, and the aperture is set to increase the depth of field. Squeeze the line (10). EDS≦AVDE
When P+TVf, control aperture value A V C4-A
V, and control shutter speed TVc4-TV. ) i
When yl > Ay)zp+ Tvt, this (A
The effect is the same even if the aperture is narrowed down more than VDEP), so AV
, create a diagram that increases TV at the same rate (see Figure 39).

When the obtained AV exceeds the maximum aperture value (AVmax), set the control AVc to AVmax, control TVc = + EVs
−AVa+ax.

When the calculated AV does not exceed the maximum aperture value (AVmax), this is set as the control AVc, and the calculated TV = EVs - AV
It is determined whether this exceeds TVmax, and if it does, the control TVc is set to TVa+ax and the control 411A is
Recalculate Vc as AVc - EVs - TVmax. When the calculation TV does not exceed TVmax, the calculation TV is set as the control TVc.

When [F] (that is, the shutter speed TVc obtained is
When the camera shake is less than H), set the communication (■) signal (S n-t-bt) to 1 to issue a camera shake warning, and when there is no camera shake, set this signal (s If-t-by) to O. do.

Then, the bit (bo) of the communication (IV) signal CTRLB
) is set to 0 to prohibit flash emission.

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

0-1-AVn≧AVoz (Determine whether it is greater than or equal to the open F (iAVoz).

0-2...The luminance difference ΔBV with the background is BVA (BV
, brightness) - BVS (main subject brightness).

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

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

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

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

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

0-7-...When not in previous flash mode, ΔBV≧1
Determine /16BVs + 0.5. From 0-4, 0
．． By increasing the size by 25Ev, it will emit less light.
It's happening.

0-12 when 0-8-AVD ≦AVO2 (when AVD is below the open F value) ΔBV < 1/16 BVs + at 0-4
0.25 (ΔBV < 1/16BV at 0-6 when D
S(7) when 0-7 ”i?ΔBV < 1/16BV
It comes when s + 0.5 (7).

Below this, the main subject (EVs) is at the low brightness judgment level /L
/ (TVF + AVoz + ΔEV). Δ
EV is ΔEv·−0,25 when there is no previous calculated value, and it is brighter when the previous light is emitted. If the previous non-emission time was low light and the condition is non-emission, the process advances to 0-13 to control flash non-emission.

Next, flash control will be explained.

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

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

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

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

Determine whether the shutter speed at Z) is equal to or higher than the synchronized speed, and when it is equal to or higher than the synchronized speed, set the control shutter speed (TVc) to the synchronized speed (TVx), and set the aperture value (AV).
is calculated from EVc - AVx, and the aperture value (AV) is A
It is determined whether the aperture value is equal to or greater than VD, and when it is equal to or greater than AVD, the control aperture value (AVc) is set to AVD, thereby preventing the main subject from being underexposed.

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

Then, each flash dimming level is calculated.

F-12"i? When TV<TVx, the control aperture value (AV
c) is the aperture F value (AVoz), determines whether the TV is equal to or higher than the minimum shutter speed (TVmin), and when it is equal to or higher, the control shutter speed (TVc) is set to TV, and TVmin
When the control shank speed (TVc) is less than TVmin
Proceed to calculate the flash dimming level.

To explain this dimming level calculation as shown in FIG. 36(C), the exposure value (EVc) is calculated from AVc + TVc, and E
It is determined whether Vc - EVs (exposure value of main subject)>0.

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

When EVc −EVs > O(7), EVc −EV
s > 3”i? Determine whether or not, EVc −EV
When s>3, the correction amount χ=0 and the process proceeds to the door. l
When 1iVc −EVs ≦3, Z= M(EVs
−EVc + 3) and advance by teaa−1, image magnification (β
) can be used, and if it can be used, β≧1/7
→ TTL, χ 1/7〉 β → TTL = χ+0.5L/10
> β≧1/40 → TTL = χ+0.875
1/40> β → TTL - χ + 1.25, and as the subject occupies the screen becomes smaller (β is small), the amount of reflected light returned from the subject decreases, and the light adjustment completion signal is delayed (and the light is not emitted). As the amount increases, overexposure occurs.In order to correct this, the amount of light emitted is reduced as β becomes smaller.

When β cannot be used, assuming that there are many subjects with 1/10>β≧l/40, TTL·χ10.875 is used. And the system? Il! Add light amount (SVc) to film sensitivity SV and TTL.

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

Then, it is determined whether the control aperture value (AVc) > AVDEP, and when AVc > AVDEP, the AVF (aperture value for determining the focus shift amount) is set to AVDEP. This brings the background (up to Co) and the main subject into focus.

When AVc≦AVDEP (7), AVF=AVc,
The main subject is set at the front of the depth of field (the one closest to the camera), and the background is placed as far as possible within the depth of field.Then, it is determined whether or not it is in focus, and if it is not, the amount of focus shift is determined. (ΔLP)・O.When in focus, convert the AVF to F using the table, and set the amount of focus shift (ΔLP) to ΔLP.
-FXKEL Calculate by Xα×δ.

This will be briefly explained in FIG. 40.

In FIG. 40, the X mark indicates the lens position (subject position). For the depth of AVDEP, AVc is AV
The depth when the depth is greater than or equal to DEP is narrower and closer to the depth of AVDEP. At this time, the lens drive control is set so that the main subject is in front of the depth of field.The dotted line indicates that the focus is out of focus (≠AVDEP).Next, when AVc exceeds AVDEP The depth of field becomes wider as the whole becomes closer.In this case, the lens is controlled to the position determined by AVDEP.

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

An example of the RAM map in the camera is shown in Table 7. In the case of such a RAM (including Et FROM) map, group M of data (Go, G+, Gz) is
P,,MP,,MP,. If it is necessary to specify a group, use the above MP, , MPff in advance.

M.P. It is sufficient to memorize the start address and number of the data and read them in response to a signal. These are compatible with existing card systems because they only read fixed data. However, new cards with other functions have been created, such as the above-mentioned other data MP,
and MP, other data cannot be read.

To make this possible, it is necessary to directly specify the start address of the data and its number (direct addressing type). However, in that case, it is not possible to specify discrete data (for example, data of MP and only data of MP), and all data from MP to MP is specified. There is no waste (memory and time) in the transfer.This embodiment transfers data efficiently by using these methods properly.

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

Table (Continued) Table Functional Data (Fbn) RAM No. 4!2 (FF) Fourth Table Loop (jIlI Table 7 Table (Continued) Table Lens (I) Table (Continued) ) Table Lens (I [) Table 11 Table 12 Table Auto depth card Camera lens information In the above embodiment, the part related to determining the aperture value and shutter speed is particularly the auto depth card shown in Figure 36 (a). The calculation flow is shown in the calculation flow.In this, AVC, TVC
The determination is performed in steps (2-1) to (2-7) and subsequent steps. That is, it is determined in step (2-2) whether the photometric value EVS obtained by the photometric means satisfies EVS≦TVF+AVoz. Step (
In step 2-2), it is determined whether TV≦TVF, but this TV is determined in step (2-1) i? TV-EVS-AV
Since there are oz and natte, in the end step (2-2) is E.
This means that it is determined whether VS≦TVF+AVoz. Then, if EVS is within this range, in step (2-3) AVC=AVoz, TVC=TV=EV
It is determined as S-AVoz.

If it is not within this range, in step (2-4) AV =
EVS-TVF and step (2-5) TeAV
≦AVDf! P.

That is, it is determined that EVS≦TVF+^VDEP. In this case, TVF +AVoz<EVS ≦TVF +AVDE
If this range is satisfied, AVC-AV, that is, AVC-EV, is determined in step (2-6).
S-TVF and TV-TVF are determined.

EV>TVF +AVDEP (7) When step (
In 2-7), EV=TV+AV, and in the subsequent steps, TVC≧TVF and AVC≧AVDEP are satisfied.'l) TVC and AVC are respectively determined.

According to the present invention, the aperture value and shutter speed are determined in consideration of the camera shake limit shutter speed, so camera shake is unlikely to occur, and the depth of field at a position the same as or further away from the subject is satisfied. Since the aperture is determined, a good snapshot with both the subject and background in focus can be obtained.

In addition, if each of the above-mentioned means other than the photometry means is provided in the accessory, the calculation function of the aperture value and shutter speed for snapshots that do not cause camera shake can be provided on the accessory side, and the camera body can be used accordingly. The burden on the side is reduced. When this accessory is an IC card, the accessory becomes small and lightweight, making it convenient.

[Brief explanation of drawings]

The figures are all related to embodiments of the present invention, and Fig. 1 is a circuit block diagram of the entire camera, Fig. 2 is a diagram showing the display form on the display section, and Fig. 3 is a diagram showing the camera reset routine. FIG. Figure 4 (a
) is a circuit diagram of the lens circuit, and FIG. 4(b) is a side view of the lens. FIG. 5 is a flowchart regarding data communication between the camera and the card. FIG. 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., and FIG. 7 is a flowchart showing a routine for AP mode determination and focus lock. 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 flowcharts showing an interrupt routine regarding the electronic flash device, and FIG. 9 is a diagram showing an interface circuit of the electronic flash device. FIG. 10 is a flowchart of lens data input. FIG. 11(a) is a flowchart of flash data input, and FIG. 11(b) is a flowchart of flash data output. Figure 12(a) is a flowchart of AF, Figure 12)
. Figure 12 (C), Figure 12 (d), Figure 12 (e), Figure 12 (f), Figure 12 (barrel), Figure 12 (c) are flowcharts related to this. Figure 13 is FIG. 14 is a diagram showing a display example in the finder regarding this. FIG. 14 is a diagram showing the distance measurement range and photometry range in the shadow screen. FIG. 15 is a flowchart of data setting, and FIG. 16 is a diagram showing exposure mode change. 17 is a flowchart for selecting a function mode, FIG. 18 is a flowchart for exposure compensation, FIG. 19 is a flowchart for self, FIG. 20 is a flowchart for creating photometry data, and FIG. 21 is a flowchart for AE flash. FIG. 22(a) and FIG. 22(0)) are flowcharts for setting the aperture and shutter speed. FIG. 23 is a flowchart of exposure calculation, and FIGS. 24(a) and 24[
]), Figure 24 (C), Figure 25, Figure 26, and Figure 2
FIG. 7 is a flow chart of each mode therein. Second
FIG. 8 is a flowchart of control by the IC card. FIG. 29(a) is a flowchart showing the display routine, FIG. 29(g)) is a flowchart showing the interrupt routine, FIG. 29(C), FIG. 29(d) and FIG. e) is a diagram showing a display example, and Fig. 29<
f) is a flowchart showing a mode setting routine. Figure 30 is a flowchart of exposure control, Figure 30(b)
30(C) is a flowchart of lens driving, and FIG. 30(d) is a flowchart of shutter speed control. Figure 31(a) and Figure 31 et al.) are 1 of the film.
FIG. 32 is a flowchart showing an interrupt routine related to closing the camera back. Figures 33, 34, 35, and 36 are diagrams showing the operation flow of the auto depth card, Figure 37 is a diagram showing examples of its display, Figures 38, 39, and 40. is an explanatory diagram thereof. Figure 2 (a) Figure 2 (b) Figure 2 (C) Figure 2 (d)

Claims (5)

[Claims] (1) means for calculating the depth between the focus position of the subject and a specific position that is further away from or the same as the focus position; means for calculating the aperture value AVDEP that satisfies the depth; means for specifying the camera shake limit shutter speed TVF; and photometry. means for calculating an exposure value EVS based on the photometric value of the photometering means, and a control aperture value and a control shutter speed TVC for controlling the exposure.
and determining means for determining as in the following [1], [2], and [3]; [1] EVS≦TVF+AVoz (however, if AVoz is the open aperture value, then AVC=AVoz, TVC =EVS-AVoz[2]T
If VF+AVoz<EVS<TVF+AVDEP, AVC=EVS-TVF, TVC=TVF [3] If EVS>TVF+AVDEP, AVC≧
AVDEP, TVC≧TVF, EVS=TVC+AVC
AVC and TVC that meet the requirements. (2) The camera system according to claim 1, wherein the specific position is a point at infinity. (3) The camera system according to claim 1, wherein the camera shake limit shutter speed is calculated based on a focal length of a photographing lens. (4) The camera system according to claim 1, wherein each of the means other than the photometric means is provided as an accessory that is detachable from the camera body. (5) The camera system according to claim 4, wherein the accessory is an IC card.