JPH02124545A - Camera system - Google Patents

Abstract

PURPOSE:To shorten focal time by forcedly stop a scanning function at the time of close-up photographing. CONSTITUTION:When a close-up card is mounted on a camera, plugs and registers are all resetted, and the camera sleeps. Then, when a signal which is changed from L to H, is sent to the terminal CSCD of the card from the camera, the card executes interruption. Then, by synchronizing with a clock from the camera, serial communication is once carried out by the card, in order to input data indicating the kind of the communication. The kind of the communication is judged from this communication data; the serial communication is carried out, and the data is received from the camera; data is set based on this data; and the camera sleeps. Thus, the focusing time can shorten.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera system, and more particularly to a camera system having a close-up photographing function and a scanning function for moving a lens to search for a measurable area.

``Theft''E-side'' [Jutsuichi Some cameras are designed to allow close-up photography. Furthermore, some cameras have a scan function that moves the lens to search for a measurable area and measure the distance when the distance measurement detection signal for autofocus is unable to measure the distance.

However, when taking close-up shots (especially when using a macro lens), even a slight shift in focus can result in a large amount of blur, and the distance measurement detection signal immediately goes into a low-contrast state. It's easy. If the above-mentioned scan function is executed even when the focus is slightly off, the lens may be scanned in the opposite direction from the focus position, and it may take time to reach the focus. There is a risk that the image will be blurred and the photo opportunity will be missed.

Moreover, in the case of close-up photography (particularly when a macro lens is used), the lens drive time from the infinity point to the closest distance is long, and the above-mentioned scanning takes a considerable amount of time.

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

In order to achieve the above object, the present invention provides a camera system having a scan function that moves the lens to search for a measurable area when the distance measurement detection signal for autofocus is unable to measure the distance. The camera is configured to include means for forcibly disabling the scanning function during close-up photography.

Further, the camera system of the present invention includes a camera body and an accessory that can be attached to and detached from the camera body, and the camera body is configured to perform distance measurement when a detection signal for distance measurement for autofocus is not available for distance measurement. a scanning function that moves a lens to search for a possible area; a receiving circuit that receives a signal from the accessory; and a determining means that determines whether or not the signal received by the receiving circuit prohibits scanning. and a prohibition circuit that disables the scan function when the determination means determines that scanning is prohibited, and an accessory having a function of controlling close-up photography for the camera body. It can also be configured to output a scan prohibition signal.

According to the configuration of the present invention, scanning is prohibited in the case of close-up photography, so there is no inconvenience that it takes a long time to focus even if the focus is slightly shifted.

When using an accessory with a close-up shooting control function, this accessory outputs a signal that prohibits scanning, so the determination circuit on the camera body side determines that scanning is prohibited, and the prohibition circuit prohibits scanning. .

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

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

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

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

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

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

The microcomputer (μC) counts these pulses, detects the amount of extension from the current position (1), and detects the distance from this amount of extension (number of extension pulses (CT)). (TVCT) is a shutter control circuit that controls the shutter based on a control signal from a microcomputer (μC).
AVCT) is an aperture control circuit that controls the aperture based on control signals from a microcomputer (μC), and (MD) is a motor control circuit that controls film winding and rewinding based on control signals from a microcomputer (μC). It is. (BZ
) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is a battery that serves as a power source;
DC/DC is a DC/DC converter (D+) to stabilize the voltage (VDD) supplied to the microcontroller.
(D4) is a group of diodes that provides a voltage lower than the voltage (VDD) to the microcontroller when the DC/DC converter is OFF, reducing power consumption. The microcomputer (μC2) of the c card (CD) cannot be driven at this low voltage. (R.R.
) (CI+) is a reset resistor and capacitor for resetting the microcomputer (μC) when the battery is installed. (Tr+) is a power supply transistor that supplies power to a part of the circuit described above.

Next, to explain the switches, (SRE) is a battery installation switch that turns OFF when the battery is installed, and when the battery is installed and the switch (Satε) turns OFF, the microcomputer (μC) A signal changing from the rLJ level to the "H" level is applied to the terminal (RE), and the microcomputer (μC) executes a reset routine to be described later. (SEM) is a normally open button type exposure mode change switch.The operation of this switch (SEM) and the up switch (Sup) and down switch (Sdn
), the exposure mode is changed. (SFu
N) is a normally open button-type function change switch, and the function is changed (for example, switching between continuous shooting and single shooting) by operating this switch and the up switch (Sup) and down switch (Sdn). (Scn) is a normally open button switch that is used when a card is installed to enable/disable card functions or to change data settings on a card other than a program card. Yes (details will be explained later). (Se
as) is a card data setting switch that is operated when transitioning to data settings when a card is installed. (Sl) is a switch for performing preparatory operations necessary for shooting such as photometry and AF operation. Then, press the first release button (not shown).
It turns ON with a stroke. The above switch (SEM),
(SpuN), (scn), (Scns), (s
+) If any one of them is operated and turned ON, the interrupt (INT+:l described later) will be executed. (So)
is the main switch that enables the camera to operate, and by turning this switch ON or OFF, the following [
INT2) interrupt is executed.

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

(S2) is a release q-switch that is operated when performing a photographing operation, and is turned on when the second stroke (deeper than the first stroke) of the release button is pressed. (Sun) is a one-frame switch that is turned ON when one frame of film is wound. (SIIEL) is a switch for performing AE lock (exposure lock) and is composed of a normally open bush switch. (SaF7M) is a focus adjustment mode switching state switch that switches between AF and manual focus adjustment.

(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 (S11u) 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 (Sa
When u) is not operated, the shutter speed is changed by operating the up switch or down switch. (S
FLn) is a film detection switch that detects whether or not film 10- is loaded, and is arranged on the film rail surface near the spool chamber and turns OFF when film is present. (SRC) is a back cover close detection switch which turns OWL when the back cover is closed and turns OFF when it is opened.When this switch is turned ON, the microcomputer (μC) executes an interrupt routine to be described later. (SR11) is a switch to start film rewinding, and turns ON when operated.
L: Executes an interrupt routine to be described later, and turns OFF when the back cover is opened. (SCR) is an IC card installation switch that turns off when an IC card (CD) is installed, and when turned off, resets the microcomputer (μC2) of the IC card (CD).

(x) is the so-called
Becomes FF.

(Sup) is a normally open up switch that changes or adds data to be changed, and (Sdn) is a normally open down switch that also performs subtraction. When changing the aperture value in M mode, turn on the aperture change switch (SaU) and operate (Sup) and (Sdn) to increase or decrease the aperture value, turn the aperture change switch off and (Sup), respectively.
) and (Sdn) function to increase and decrease the shutter speed, respectively. Up switch (Sup),
The terminal (I) indicates that the down switch (Sdn) has been operated.
Detection is made when P20) and (IP21) respectively reach r L '' level. In FIG. 1, a line (WI) common to each of the switches is connected to a ground potential point (GND).

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

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

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

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

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

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

(iii) The relationship depending on the operation of the lens side switch is that which AF (autofocus) mode is selected when the switch provided on the lens side (described later) is operated. The modes are: ■First, when the switch is not operated, (E-1)
One shot over the entire area using multiple points/spots (following judgment after focusing) ■When the switch is operated (E-2) Focus lock (E-3) Spot AF (E-4) Continuous AF , rcuS of the display shown in Fig. 2(d) at the time of setting.
The t-IJ value “3” becomes “2” and the blinking display “1”
” will be “1” to “3”, but this blinking display will be “1” to “3”.
"3j" respectively correspond to the above-mentioned rE-24 to "E-4" (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, modes (i) to (m) are sequentially selected by turning on the card key once when setting the mode, and pressing the up switch or down switch selects that mode. The function (setting value) inside is selected. Modes (i) to (III) and functions can be set cyclically, respectively.

(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).

=16- (Iff) Function card; (3-1) H/S card ((Highlight/Shadow) card) This card makes white items whiter and black items blacker, and is obtained with a camera. Exposure value exceeds 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 floater switch. be exposed.

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

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

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

(IV) Data memory card: This is a device that stores shooting data, including: ・Film counter ・Controlled aperture value ・Controlled 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 (SR1
) turns OFF, and the terminal (RE) changes from 'L' level to r.
A signal that changes to the "H" level is input, setting the DC/DC converter to 0H (PWO = rHJ), the built-in clock starts oscillating, and the IC card (CD) is output via the terminal (φ).
A clock is also sent from the microcontroller (μC) to the microcontroller (μC). In addition, in the case of an interrupt, turning on the DC/DC converter and starting the clock are automatically performed by a hardware circuit. Next, the microcomputer (μC) executes the RESETI routine shown in FIG.

The microcomputer (μC) prohibits all interruptions to this flow (#100) and sets all output terminals other than the DC/DC converter control (PWO) to the rLJ level (#105). 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 AF mode, single shooting (S)/continuous shooting (C), single shooting (S)
), the mode without exposure compensation, and other settings are set.

Next, in step (#115), the number of films stored in E2FROM (N+), film sensitivity (Sv)
is read and transferred to a predetermined RAM. Thereafter, it is determined whether the main switch (So) is in the ON state (#120). If the main switch is in the OFF state (IF5-“H”), proceed to step (#125) and turn the power supply transistor (Trl) to OFF (PW=
rLJ') and performs data communication (VI) of serial data with the card.

Here, serial data communication will be briefly explained. A serial communication command sends a signal to the other party to start data transfer (in the case of a card, C5oD-"
Then, the serial clock (Scx) for transfer 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. Do this 8 times (
8 bits), one data transfer is completed, and by repeating this as many times as necessary, the necessary data can be obtained. The same applies to data communication with the lens (LE), data communication with the display control circuit (DISPC), and data communication with the electronic flash device (ST).

Here, the data communication (v■) with the above IC card is
It is shown and explained in Figure (f). In this communication, first the terminal (C
8CD) to "H" and requests communication (#270).

Next, set the data indicating data communication (VI), set the camera on the output side, and perform data communication of the data indicating communication (Vl) ($1272.~
#277). Once this is completed, 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 ($1
285), after inputting the data, the terminal (C3CD) is set to "L" to indicate the end of communication (#286). Based on the data input in this way, the camera's microcomputer (μC) determines whether it is in a state where it is okay to sleep (stop).
This is from the camera's microcontroller (μC) to the IC card (CD).
) is required for the operation of the IC card and the voltage (V
DD), these clocks and voltages are not sent during the operation of the IC card (when the camera goes to sleep, the clock stops and the voltage drops), and the IC card's microcontroller (μC2) This is to prevent this from happening, since predetermined signal processing (writing control to the E2PROM) cannot be executed.

Returning to FIG. 3, in step ($1135), the above-mentioned judgment, that is, the judgment as to whether or not the camera's microcomputer (μC) can go to sleep, is made based on the input data. In step (#140), all interrupts are enabled and the program goes to sleep. This sleep causes the clock to stop and the DC/DC converter to be turned off by hardware. If sleep is not possible, step (#
Step (#130) after waiting 30m5ec at 145)
Go back and repeat the same process.

Next, the interrupt [IN72] caused by turning the main switch (So) ON or OFF will be explained.

First, it is determined in step (#147) whether or not the interrupt is caused by the ON of the switch (SM), and if the interrupt is not caused by the ON (IP++"' HJ), [:INT+
), disable interrupts #240), set display data (display all lights off at this time) 11245), communicate data with the display microcomputer of the display control circuit (DISPC) in step (#250), and execute step ( Proceed to #125) and perform the same processing as described above.

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

On the other hand, at step (#147) the main switch (So) is
is ON, in step (#150) [;
Enable the lNTl 1 interrupt and proceed to the next step (#15
Display data is set (standby display) in step 5), and data communication is performed with the display microcomputer in step ($1160). Through this data communication, the display microcontroller is activated as shown in Figure 2 (
Perform the display shown in f). In this FIG. 2(f), P mode is selected as the AE mode, no exposure compensation, and single shooting mode.

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

Next, the camera's microcomputer (μC) has a terminal (IPs) of
Is it at “L” level (switch SEMI 8puN,
In step ($1170), determine whether any one of Sen, 5cos, and S+ is ON or not, and set ``L''.
” level, the process proceeds to step (#125) and the sleeve is controlled as described above. If it is "L" level,
Proceed to step (#180) and set the flag (OFF) to hold the power for 5 seconds, and turn on C81 (described later).
) is executed (#190). Next, it is determined whether the terminal (IPs) is at the "L" level (step #20). If the terminal (IPs) is at the "L" level, step (#20
After setting the card request signal (DSPREQ) to 0 in step 3), the process proceeds to step (#180), and steps (#180) and (#190) are repeated. If the level is not "L" (that is, if none of the above five switches are operated), proceed to step (#205), and determine whether or not the power supply holding flag (OPF) is set; If it is set, reset and start the power hold timer in step (#215), and then proceed to the next step (#22).
0) to reset the flag (OPF) 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 S+ON 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, while if the elapsed time has not elapsed, the flow from step (#190) (C81ON) 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 ($1172), the flow advances to step (#180) and subsequent steps.

Next, the Luruno [S,] that controls photometry, AF, and display will be explained with reference to FIG.

First, interrupts of C lNTl ] to this flow are prohibited (#400). This is because if the interrupt (lNTl) shown in FIG. 3 occurs during the main control, the control operation will not proceed further. Next, ($405), microcontroller (μ
Set the terminal (PW) of C) to “H” level and turn on the inverter (
PNP transistor (Tr+) via INI)
By applying a low level to the base of the transistor (Tr+), the transistor (Tr+) is ONL, the photometry circuit (LM), and the
Supplies power to the F circuit (AFCT), etc. Next, input information specific to the interchangeable lens from the lens circuit (LE) ($
1410). This is shown in FIG. 10 and explained. First, the terminal (C8LE) is set to the rHJ level (#600), and serial communication is performed as many times as necessary to input information from the lens (#805). FIG. 4(a) shows the circuit inside the lens and will explain it. A decoder (2) counts the clock input from the camera and creates an address signal. At this time, when the predetermined address is reached, the lens data changes due to zooming, so the focal length is detected by the encoder (3) that detects the focal length, and the address is changed by the address circuit (5) according to the focal length. Then, predetermined data is output to the camera body.

The switch (S9) 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
The 6ROM (6) that outputs to the OM (6) outputs data based on the designated address. The output of this 61 is converted into a serial signal by a parallel-to-serial conversion circuit (7) and applied to the camera body.

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

On the other hand, on the lens (10) side, there is a ROM as shown in Table 9.
and address structure. (A) and (B) are the same ROM but differ only in the So amount relationship and the LOK relationship.
It stores two similar data in memory. Conventionally, lens information has been relatively small, and a plurality of types of lens information with the same function can be stored in one ROM, and the lens information can be switched depending on the lens used. In this case, the amount of information per lens is fixed, and the required ROM is determined accordingly. In such a case, creating (increasing) new data indicating that the switch is ON or OFF requires two additional steps when data is changed by changing the address in the ROM according to the ON or OFF state of the switch. This means that a byte (ON, 0FF) is required. If there is room in the ROM, add 2 bytes 068, 08H as shown in Table 10, and change the address to select 06H, 08H depending on whether the lens side switch (So) is OFF or ON. do it. However, when there is no such leeway,
As shown in the table, in this embodiment of the ROMC provided for multiple types, (B)] is the same data except for the data changed by turning on and off the switch.
This can be done by selecting (A) or (B) depending on FF or ON. However, in this case, the types of lenses that can be used with this ROM are reduced. For the lenses in Table 9, when the lens side switch (So) is OFF, either 06N, 07H, 08)
In the case of N, 16H and 178 (bo=0. AF motor stopped) will be sent. In addition, in the address (XX
X) indicates address data that changes depending on the amount of extension of the zoom or focusing lens, and is input from encoders (3) and (4).

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

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

Now, even when a lens that has the function of the above switch (So) is attached to an old camera that does not read this bit (because it is new data), it will also have the function of this lens side switch (SO). (However, the latter two of the changes in functions by the IC card - selection of focus lock, continuous, and spot AF - cannot be performed because the IC card is not an old camera, and the focus cannot be changed. ), and if the LOK signal is disabled from AF in response to the above switch (So) being turned on, the old camera will still be A.
AF operation is prohibited because the lens cannot perform F.
Performs focus detection only. In order to execute this, when the above switch (So) is turned on, B in Table 9 and 10th
In the table, it is 07) 1, 08H, and the switch (So) is O.
When it is FF, it is A in Table 9, and 06o and 0 in Table 10.
Either one of 7H and OL may be changed.

Regarding the control on the camera side, it is only necessary to determine whether or not to inhibit AF when reading the lens data, and to control whether or not to inhibit AF, so a description thereof with reference to the drawings will be omitted.

After entering the lens information described above, the terminal (C8
LE) is set to "L" level and returns (#610).

Returning to FIG. 6, the microcomputer (μC) continues to perform data communication (I) with the card in step ($1413). In this data communication (I), the state of the camera switch.

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

This content is shown in the CAeCD table (see column I communication). Data communication (I) is shown in FIG. 5(a). The communication method is almost the same as the data communication (V) shown in Figure 5(f) above, except that data indicating communication (I) is set and output, and then Data communication (SIO) is performed three times, and the camera side is the output side in this communication as well. Note that the use of these data will be described later.

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

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

(Dl) is a capacitor for preventing reverse charging, (C+)
is a large capacity backup capacitor, (μCa
) 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, (IJC) is a light emission control circuit that controls light emission, and (DISP) is a display circuit.
As shown in b), this indicates whether or not the power is on (a state in which boosting the voltage and data communication with the camera can be performed by signals). When it is on, "ON" is displayed, and when it is off, nothing is displayed. Not done. (Ilo CG) is an input/output switching circuit that switches input/output for communication with the camera.

(SM) is a normally open bush 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 light emission amount reaches , it outputs an "H" signal. (Lo) is a normally open switch that changes the light emission amount between 174 and full light emission, and each time the switch is turned on, the switch changes from 1/4 to full light emission.

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

When the above power switch (SM) is operated, the microcomputer (
A signal that changes from "H" (the terminal is pulled up internally) to "L" is input to the microcontroller (μC2).
) receives an interrupt, and the microcontroller (μC3) interrupts the microcontroller (μC3) as shown in Figure 8 (
Execute the flowchart shown in C). In this flowchart, first, a flag (ON
F) is set (#5T10
). When set (ONF=1), the terminal (OP2) is set to “L” to reset this flag and stop boosting.
” level, turn off the ON display, and go to sleep (ls
T20-1lsT40). 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 (OP2) is set.
Start boosting with rHJ level (#5T50.
#5T60). Then display ON (#5T70)
. Next, reset the timer and start #5T80).
Wait for 5 minutes (#ST9, when 5 minutes have passed,
Proceeding to (#5T20), the same control as when turning off the power is performed and the device 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 an "H" signal with a pulse width (T1) 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 (μC3) inputs this change signal and calculates (
INT+:] Processes the interrupt.

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

The microcomputer (μCa) first sets the terminal (OPl) to “H”.
level, reset the timer, set all outputs of the timer to "L" level, and do not respond even if a signal is input to the timer (#5T11). Then, set the flag indicating power ON (ON ) is set in step (llsT120), and if it is set, the data communication bit (STS+) is set to "
1"(#5T130), set the terminal (OP2) to the rHJ level in step (118T140) to start boosting, and proceed to step (#5T180). On the other hand, if it is not set, reset the above bit (STS+) and proceed to step (#5T180) (#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, the guide number restriction switch (r, o)
is turned on, and if it is turned on (IP = r LJ), a flag indicating this restriction (LOLM
TF) is set (#5T1
81.1lsT182). When set, reset this and set the terminal (OL) 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 (OP4) to "H" level, permit light emission limitation, and certify communication data (STS3) (#5T186. to #5T187). ). switch(
When LO) is not turned on, step (#5T19
Proceed to 0).

Note that this step (#5T190) requires step (#S
It also comes from 'l'184) and (#5T187).

In step (llsT190), an electronic flash device (3T
) is the output side, and the terminal (I/QC) is set to the rHJ level in order to indicate the output to the input/output switching circuit (IloCC).

The signal of the above bit (STS+) and the electronic flash device (ST
) (#5T200), wait for the data communication clock (SCK) to be sent from the camera body, and wait for the data communication clock (SCK) to be sent from the camera body. When this happens, communication is controlled to output data through the terminals (So, t) and the input/output switching circuit (IloCC) in synchronization with this (#5T210).
. When this is completed, the terminal (OP,) 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 microcontroller (μC3) inputs this to the terminal (IPl),
Proceed from slow 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 r'[, J level (#5T2
50), the electronic flash device is controlled to be on the input side. Then, the input/output circuit (IloCG) receives the camera data sent in synchronization with the communication clock (SCK) from the camera.
through the terminal (SIN) and read it into the specified register (RAM) (#5T260. #5T2
70). Then, the terminal (OPI) is set to the "L" level, making it possible to receive pulses from the camera (#
5T280). As manually input data, the presence/absence of light emission, the presence/absence of forced OFF of the power supply, the presence/absence of forced ON of the power supply, and the presence/absence of light emission restriction cancellation are input.

In step (#5T290), it is determined based on the input data whether or not the power is forcibly turned on. If it is not forced ON, proceed to #5T330. On the other hand, when indicating forced ON, a flag (ONF) indicating power ON is set and the terminal (
OP2) is set to the rHJ level, starts boosting, displays ON, and proceeds to step (#5T330) (lls
In steps T300 to #5T32 (#5T330),
It is determined whether or not the power is forcibly turned off based on data from the camera. When forced OFF, the microcontroller (μC3) turns off the ON display and sets a flag (ONF) indicating power OFF.
Reset the terminal (OP2) to "L" level to stop boosting and go to sleep (#5T420 to #5T4
40). On the other hand, if it is not forced OFF, step (#5
T340), reset and start the timer,
It is determined whether 5 minutes have elapsed (#5T350). When 5 minutes have passed, proceed to step (#5T420) and force 0
Performs the same control as 17F. If 5 minutes have not passed,
Determine whether exposure control is activated (#5T380); if exposure control is not activated, step (#5T350)
Return to step (#5T350) and (llsT36
Repeat 0). 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 sets the terminal (EC) to the "H" level. When this signal is input, the microcomputer (μCa) resets and starts the timer (#5T370). Based on the signal sent from the camera indicating the presence/absence of light emission, the microcomputer (μCa) resets the terminal (OPa) to indicate light emission. r HJ L/HEL (llsT400), when it does not emit light, connect the terminal (OP
Set a) to “L” level and perform each step (#5T41
Proceed to 2). In this step (#5T412), the movement of the front curtain of the shutter is completed from the ON of the switch (S2).
Time to α (light emission time of electronic flash device) (= 150
m5ec) and set the terminal (OP+) to “L” #5
T415), the switch (#
Proceed to 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 (AND2
) 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 (OPa) to "H"/"L".

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

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

-(IloCG) is the input/output switching circuit, which is the terminal of the camera.
Electronic flash device (ST) according to the signal from (I/QC)
It switches the direction of data communication (input or output).

In FIG. 11(a), the camera's microcomputer (μC) outputs a pulse with a width of a certain period (1+) to the terminal (C3FL) 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 (#6
50~#655).

Returning to FIG. 6, the AF mode is determined in step (#417). This AF mode determination subroutine = 4
0- Shown in Figure 7(a). First, it is determined from the lens information whether the above-mentioned lens side switch (SO) is turned on (#4000). When this switch is turned on, the power retention time is reset and started (1
(starts from 0 seconds), flag (O
PF) and determines 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 E2PROM 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.

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

The microcomputer (μC) reads information from the E2PROM in the camera and determines whether or not the AF mode is the focus lock mode in step ($14010). Here, when in focus lock mode, switch (S
Set the focus lock bit (Fb+4) according to o), reset the bit (Fb+s) indicating the auxiliary light mode, and furthermore, when the tracking mode is displayed,
Reset the flag (following F) to turn it off (#
4020 to #403.

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

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

Next, determine whether the 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 (#4036) whether or not the flag (SQONF) indicating that the switch (So) is turned on and the flow has passed for the first time is set, and whether or not it is set. If not, proceed to step (#4037) and change the contents of bit (Fb2) to bit (Fb2) in order to memorize the multi-point/spot mode before the switch (SO) was turned on.
b, 6), reset the above flag (SQONF) #4038), set the spot mode to step (#4040) and set Fb2 to 1), step (#4045).
). If the flag (SQONF) is set, the process skips step (#4037) and proceeds to step (#4045). Step (#4045)
Then, it is determined whether it is continuous AF or not, and if it is continuous AF, a bit indicating this (Fb8
= 1) (#4050), reset the bit (Fb13) indicating the auxiliary light in step (#4055), and return. It is now assumed that the auxiliary light mode for continuous AF is prohibited in consideration of power saving.

Continuous AF that never finishes focusing,
This is because if the auxiliary light is emitted every time focus detection (integration) is performed, the battery, which is the power source, will be consumed quickly and the number of films that can be photographed will be reduced. Step (#40
45), if continuous AF is not used, return immediately. In addition, in the flow when the switch (so) 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 whether or not the control is performed immediately after the switch (So) is turned off is determined based on whether or not the flag (SQONF) is set (#4065). If set, the bit (
By moving the contents of bit (b2) to bit (b2), the multi-point/spot focus before spot AF selection by switch (So) is obtained tL 6 (#4070). Socite,
Reset '75g (SQONF) and step (#4
087). When the flag (SQONF) is not set in step (#4065), 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. Set the step (#408
Proceed to 7). If it is not forced spot AF, step (
Skip #4085) and proceed to step (#4087). Next, in step (#4087), it is determined based on the signal input from the card (sports card) whether or not it is forced continuous AF, and when it is forced continuous AF, a bit (Fbe) indicating this is determined.
bit (Fb+) to disable auxiliary light mode by setting
3) and return (#4゜88, #4
089). When not forced continuous, reset the bit (Fbs) to indicate one-shot AF (#4
090) and return.

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

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

In this data communication, the camera first sends data indicating data communication (II) to the card (one serial communication) (#320 to #327), and then the camera becomes the input side (#330) and waits ( #332) L, perform serial communication once and obtain 10 bytes of data (#33
5). To briefly explain the contents of this data, the first 4
The bytes are data for controlling individual functions of the camera depending on the card (details will be described later).

Next 5th. The 6th byte is a missing byte, the 7th byte is a missing byte, and the 7th byte is a missing byte. The 8th byte specifies the number and start address of data to be output during subsequent data communication (■) (camera input), and this is called a "directly specified address type." Next 9th. The 10th byte is used to input the necessary data by specifying the group of data to be output to communication (■) and communication (IV). In particular, the 9th byte is for communication (■)
, the 10th byte indicates communication (■), and this is called a "group designation type". These two specification methods are specified in the 3rd byte bit (b6) of the 4 bytes above.
By switching between cards and transmitting only the necessary data, the system efficiently saves time. Then, returning to FIG. 6, it is determined whether or not the AF prohibition data input in communication (It) is set (#425). If it is not set, or if self-timekeeping is not in progress (SLP=O), Check whether the AF start switch (Sl) is turned on or not using the terminal (Ip+,)
It is determined based on the level of (#427). When the above switch (Sl) is turned on (IPs/"L" level), the AF is controlled (#429) and the switch (S,)
Set the flag (S, 0NF) indicating ON ($1
430).

AF based on the data input from the card during communication (n)
When prohibited data is set, when self-timekeeping is in progress, or when the switch (Sl) is OFF (I
Ps = r HJ level), in order to prohibit AF operation, a signal to stop the AF drive motor is output to the lens control circuit (LECN), and the lens drive is stopped (#
431), a flag indicating that AF is not being performed (AF
NF), set the switch (11435), and switch (
The flag (S+0NF) indicating ON of S1) is reset (#437). When the data setting mode is set in this way, by prohibiting AF control and giving priority to data setting in the card example, even if the AF start switch (Sl) is pressed by mistake during data setting, AF operation will not occur. I'm trying to prevent it from happening. Furthermore, the above flag (AFNF)
When is set, a signal (AEFLAG b+) indicating that image magnification data cannot be used is set to "0" and output to the card during data communication (I[I).

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

First, in FIG. 14, the outer rectangle (12) indicates the photographing screen. Among them, (LM+) to (LM4) indicate the photometry range, and (API) to (AFL) indicate the focus detection range.

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

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

To explain the AF control shown in the flowchart of Fig. 12(a), first, in order to detect whether the AF start switch (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 (AFEF), the flag indicating low contrast scan inhibition (LSIHF), and the flag indicating the beginning of low contrast scan (LSFI) are reset as if it was pressed for the first time (#702. # 703. #704), proceed to step (#705).

Note that the low contrast scan and these flags will be described later. When set, step (#702
) directly without going through steps (#705) to (#7
Proceed to step 04). Then, it is determined whether the lens is attached based on the input signal from the lens =49- (#705). Then, if the lens is not attached in step (#705), a flag (AFNF) indicating that AF is not being performed is set and the process returns (
#8°.

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 it is forced AF mode, step (#711)
Proceed to. On the other hand, when it is not forced AF mode, you can check whether the focus adjustment mode is AF mode/M mode by using the terminal (IP+).
It is determined by the level of o) #710), and when the AF mode is selected, bit (Fb+4) is used to determine whether focus lock mode is selected in step ($1711)
). When in M mode, step (
$1798) to disable auxiliary light mode (Fb+sO)
, 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 determine whether or not focus is achieved (#780). ), if in focus, set the flag (AFEF) (#781); if not in focus, reset (#782) and return.

This manual focus subroutine is shown in Figure 12 (
As shown and explained in d), first, a flag (MFF) indicating manual focus is set, and integration control is performed to control integration and execute data dump. In manual focus, set Fra /l/ (AP2F), which indicates the second island among the three islands in the AF area, and set the day focus amount (DF2) for this island.
is calculated and returned as the day focus amount ($4100 to #4110).

The integral control subroutine in the above step (#4101) is shown in FIG. Proceeds to step (#4163) without emitting 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 ($14163) ($14150 to $14160).

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

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

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

As a result of the determination in steps (#710) and ($1711), if the focus lock is selected by the switch (SO) in AF mode, the lens drive is stopped in step (#712) and whether the focus is focused or not. , the flag (AF
Determine whether EF) is set (#713), and if it is set, proceed to step (#714), control M focus, and return to step ($1780).
Proceed to. If it is not set, step (#79
Proceed to 9).

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

When AF is determined in step (#710) of FIG. 12(a) and focus is not locked (Fb+4=O) in the next step ($1711), step (#7
15) indicates that AF is not being performed (AFN
F), and at the same time, a flag (MFF) indicating manual focus is reset in step (#717). The microcomputer (μC) controls the accumulation (integration) of the charge generated according to the amount of incident light in the CCD for distance measurement, and after the integration is completed, the integrated value is converted into digital data and the obtained data is input (#720 ). And step ($17
30) to detect whether it is spot AF or not (Fb of function data
2) and spot AF (Fb2=1),
Proceeding to step ($1735), the spot AF subroutine shown in FIG. 12(d) is executed. In this subroutine, a flag (AF2F) indicating that 8F is being performed is set based on the second island, and the day focus amount (DF2F) of the second island is set based on the input data.
) is calculated and set as the day focus amount for lens driving (#4102 to #4110).

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

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

=54- In Fig. 12(f), the microcomputer (μC) first resets the flag indicating the island (AFIF-AF3F), detects the largest day focus island, and uses the detected island day focus amount for lens driving. As the day focus amount, the above flag (
AFIF - AF3F) and return ($
1810~#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 set the flag (LCONF) to indicate the failure.#
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, auxiliary -55 = It is useless to emit light. , controls low contrast scan. Low contrast scanning refers to performing focus detection while driving the lens to search for a focus detectable area when focus cannot be detected. This is shown and explained in Fig. 12 (h). First, there is a flag (LSIHF) indicating that a focus detectable area was not obtained even though low contrast scanning was performed.
is set (#4400).

When it is set, it is useless to perform low contrast scan any more, so return. If not set, it is determined whether a signal indicating prohibition of low contrast scan is input from the card (#4405). If it is input, return without performing relow control scan. If it is not input, determine whether the flag (LSFI) indicating that this flow has been executed is set (#4410), and if it is not set,
Set this (#4415), and set the flag (FWF) indicating the feeding direction (#442, set the lens drive amount n to a positive value (K large) that is larger than the maximum lens feeding amount ($14425) , 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 (#4430), and if it has not come, return. , then stop the lens (#4430), and determine whether or not it was extended before stopping ($4440).

In order to detect this extreme end, a hard timer (not shown) is working, and this hard timer is reset and started every time a pulse from the encoder is received. When this timer has counted a certain period of time, it detects the extreme end of extension or the extreme end of retraction as a state in which the lens cannot be driven. And if it is a payout (FWF=1
) Reset this #4445), and next time set the lens drive amount to -(K large) to control the renormalization (#4445).
4450), return.

When the flag is not set, it is useless to perform low-contrast scans even if both carry-out and carry-out are performed, so the flag (LSIHF
) ($14455) and return. Then proceed to (#752), proceed to step (#752),
Perform the same processing as above.

On the other hand, if the brightness is low in step (#757) of FIG. ) to prohibit AF using the auxiliary light, and if it is not in the prohibition mode, proceed to step (#
760), the auxiliary light mode (Fb13=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 (
$1765), and if it is in focus, set the flag (AFEF) indicating the focused state (#767), and set the flag (AFEIF) and step (#755)
Proceed to.

If the focus is not in step (#785), step (#785)
Step #775) executes a subroutine for lens drive control, and then returns. This subroutine is shown and explained in FIG.
48). If it is the follow mode, proceed to the switch (#4330). When the flag (tracking F) is not set, either one-shot AF (-once the lens is focused, further lens driving is stopped, and focus detection may also be stopped at this time) or continuous AF (after focusing (follows the subject and drives the lens according to the required day focus amount)
Determine whether it is based on data (Fba) (#4250
). In the case of one-shot AF (Fbs=0), check whether the flag (AFEF) indicating focus is set (#4
255), and if it is not set or in the case of continuous AF (Fb8=1), step (#4330) and (#4335) are performed.
4340), the lens drive is controlled. In step (#4330), a flag (AFEF) indicating focus is reset, in step (#4335) the lens drive amount is determined, in step (#4340) the lens is driven, and the process returns. The lens driving in this step (#4340) is performed by the lens driving circuit (LECN) driving the lens by a value corresponding to the driving amount (N).

FIG. 12(g) shows the subroutine for determining the amount of lens drive described above. The microcomputer (μC) determines whether or not the flag (following F) indicating the tracking mode is set (#4341). If not, proceed to step ($14345). When the flag (tracking F) is set, the current day focus amount (DF)
(DPI) (#4342). Then, find the day focus amount DF = DF + (DF - DF2) (DF2 is the previous day focus amount, that is, the difference between the previous and current day focus amount is added to this time), and set (DPI) as (DF2). Proceed to step (#4345). In step (#4345), the lens drive amount (N) is determined by multiplying the determined day focus amount by the value . Read the number of lens extension pulses at that time and set it as (CTa), △
CT3CT12 calculates ΔCT as the amount of movement of the lens from the center of integration, subtracts ΔCT from the above N to find the lens drive amount at the end of the calculation, and returns (#434B) ~
(#4348).

In step (#4255), when the flag (AFEF) indicating that focus is set is set, the process proceeds to step (#4257). Then, it is determined whether or not forced one-shot AF is being used, and if it is forced one-shot AF, the process returns immediately. This prohibits tracking mode during forced one-shot AF. When the tracking mode is the normal one-shot AF mode that is not prohibited = 60-, the flag (AFEI
F) is set (#426).

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

First, in step (#4265), the registers (DF2) and (DF3) that store the day focus amount are reset, and the obtained day focus amount (DF) is stored in the same register (DPI) (#427, Set variable (N) to O (#4275), above (AFEI
F) (#4280) and return. In step (#4260), after focusing (AFEF・1
), when performing focus detection from the second time onwards (AFEIF=O
), proceed to step (#4285), and sequentially memorize the day focus amount in the register that stores the day focus amount [The contents of the register (DF2) are stored in the register (D
F3), transfer the contents of the register (DPI) to the register (DF
2), store the obtained day focus amount (DF) in the register (
DPI)] Add 1 to the variable (N) and store this (
It is determined whether N) is 2 or more, that is, focus detection has been performed 3 times after focusing, and if it is within 2 times, the lens is driven and returns (#4285 to #4305).

In step (#4305), if it has been performed three or more times (N22), proceed to step (#4310),
The day focus amount is determined by the average of the past three day focus amounts (the average of the contents stored in the register), and in the next step (#4315) it is determined whether this value is greater than or equal to a predetermined value. This means that it has been determined in the past three focus detections whether the subject is moving at a predetermined speed (on the image plane). When the value is less than the predetermined value, it is assumed that the subject is not moving, and the tracking flag is reset (#432).
0), return.

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

Here, the display in the finder regarding focus detection will be explained based on the display in the finder shown in FIG. When 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 the focus detection area, and when the internal area (102) is displayed, it indicates spot AF,
When only the outer region (102b) is used, multi-point distance measurement is shown. (103) is displayed when the mode for continuous AF or tracking mode is indicated (following F.1), and is turned off when the mode is not continuous AF or tracking mode. (104) "r AF 7M" performs AF display when in AF mode (AFNF=O), and performs M display in other cases (AFNF=1). In addition, the AF switch (
$1) is OFF (81OFF=0), the display in the viewfinder is turned off.

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

This is illustrated and explained in FIG. 15. Based on the data input from the card, whether or not the display control mode (data setting) is in progress is determined from the data input in communication (II) #90
5) If the mode is display control mode from the card (during data setting), return. When not in the display control mode, it is determined whether a flag (SLP) indicating that time is being measured in self mode, which indicates that time is being measured in self mode, is set (#907). Returns when set. If it is not set, it is determined whether the exposure mode change switch (SEM) is turned on or not (#91); if it is turned on, the process proceeds to the change subroutine (#915) and returns (details will be described later). If the above switch (SEM) is not turned on, proceed to step (#920) and function change switch (
SFUN) is turned on. When this switch (SFuN) is turned on, the process proceeds 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.
Every time the up switch (Sup) is turned on once, the process progresses cyclically, progressing sequentially to P-+A-+8-+M and then returning to P, and the down switch (Sdn) is turned on once.
Each time, the process progresses like P4-A4-84-M,
After P, it moves cyclically in the opposite direction to the above-mentioned up direction, like moving to M, but the E2F inside the camera
By ROM data or data in custom card,
The exposure mode 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)
Determine whether the card function is ON based on the FF signal ($1100). If not ON, enter camera control. If ON, determine whether it is a custom card or not.#
1001), if the card is not a custom card, check step (#) whether or not a forced P mode signal is input from the camera.
1002), and if the forced P mode is set, the P mode is set (#1003) and the process returns. If it is not the forced mode, in-camera control is entered to determine the AE mode from among the settable AE modes stored in the E2FROM in the camera. On the other hand, if it is a custom card, data (EEC8TM=0.
Based on step 1), the AE mode is determined from among the settable AE modes stored in the card.

The only difference in the selection of modes P, A, S, and M is the data to be selected (camera E2FROM, card data), and the selection control is exactly the same, so the explanation will be based on the data of the E2PROM inside the camera and the camera. Control only.

The microcomputer (μC) determines whether 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.
).

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. If it is selected, proceed to step (#1010) and check whether A mode is selectable in the internal E2PROM. Determine by bit, and if selected, change exposure mode from P to A.
11015), functional data (Fbo, Fb+) (
Change from 0,0) to (0,1) and return (#10
15). If it is determined in the above step (#1010) that the A mode is disabled, the process proceeds to step (#1025), where it is determined whether the S mode is selected and if the 8 mode is not selected. If the M mode is selected, the process further advances to step (#1040) to sequentially search for selectable modes. Then, if there is a selectable mode, it is set. And A, S,
When M mode is not selectable, that is, only P mode is selectable, P mode is selected (
#1050).

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

Now, when S mode is selected as the control exposure mode (Fbo, Fb+ = 1.1), it is determined whether M mode is selected, and if it is selected, M6
If it is not selected, it is set to P mode and returns (#1035 to #1045). When the control exposure mode is not 8 mode, that is, when it is M mode, then P mode is selected. This is because the P mode is always selected in this embodiment.

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

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

Next, the function change switch (SFUN) shown in FIG.
The control when the result is N will be explained. The microcomputer (μC) executes the flow after the data change step (#1205). The microcomputer (μC) determines whether the switch (SSE) indicating the function to be changed is turned on (#1205), and if it is turned on, determines the function to be changed from the bits (Fbo, Fb+o). $1122
5), Proceeds as +/- → S/C → S/A, and after S/A is +
The data of the bits (Fbo, Fb+o) are changed by proceeding cyclically such as 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
o, Fb+. ) to determine the amount of exposure compensation (#1280), and if the function is in +/- mode (#1285)
0.5 is added to Ev) and the process proceeds to a subroutine (#1287) that determines its size. This subroutine is the 18th
As shown in the figure, if the correction amount (ΔEv) is positive, the data Fba and Fb5 are set to 0.1 as + side correction, and -
If it is side correction, data Ft)4. Fb5=1. O,
Furthermore, if the correction is zero, it is assumed that there is no correction and the data Fba
, Fb5=0. Return as O (#1
350~#1370).

Returning to FIG. 17, in S/C mode, data (F
b3) determines whether the current mode is single shooting (S) or continuous shooting, changes the data so that it is opposite to the current mode (#1295), and returns. The above two modes (
+/- mode, S/C mode), that is, S/A mode, the current mode is Spot AF.
(S) or multi-point AF (A) based on the data (Fb2), and set the data (Fb2) so that it is opposite to the current mode.
Change Fb2) #1300) and return.

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

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

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

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

If 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.O), it is determined whether P shift is prohibited (#1817), and if it is prohibited, returns. If it is not prohibited, proceed to step (#1830). Step (#1830)
Then, 0°5Ev is added to the aperture value (Av), and it is determined whether this exceeds the maximum controllable aperture value (AvmaX) (#1835). If it exceeds, set the maximum aperture value (Avmax) as the aperture value (Av) (#1840), if it does not exceed it, do nothing and proceed to step (#1845) to check if it is in P mode. If it is the P mode, the process proceeds to step (#1879) of the flowchart of FIG. 22(b).

Returns if not in P mode. Step (#18
15) and when it is not P mode, (Fbo, +≠0,0
), to determine whether it is in A mode #1820), A
If the mode is (Fbo, Fb+ = O, O), proceed to step (#1830) and perform up control of the aperture value (Av), and if it is neither, that is, S mode (
Fbo, Fb+ = 1.1) is the step (#1.8
Proceeding to step 23), the shutter speed (Tv) is increased.

When the down switch (Sdn) is turned on in step (#1805), step (#1805) in FIG.
1865), determines whether the mode is M mode, and
mode (Fbo, Fb+-1, ■, it is necessary to determine whether the aperture change switch (S9.) is ON.
1877) If it is turned on, the aperture is changed and the process goes to step (#188.5); if it is not turned on, the shutter speed is changed and the process goes to step (#1905). Step (#1905) subtracts 0.5Ev from the set shutter speed and determines whether this is slower than the camera's minimum shutter speed (Tvmin) #1
907), if slow, limit the shutter speed to the lowest shutter speed #1908), otherwise return without doing anything. When the aperture change mode is determined in step (#1877) (SIIUON), the aperture value (Av) is decreased by 0.5Ev in step (#1885), and then that value is set to open in step (#1890). Aperture value (A
vo), and if it is smaller, the aperture value is set as the open aperture value (Avo) (#1895).

In the step (#1890), the aperture value (Av)
is not smaller than the open aperture value (Avo), the step ($11895) is skipped and the step ($119
00). In the judgment of this step (#1900)
If it is the mode, proceed to the control flow for increasing the aperture value (#1850 to #1880) in FIG. 21(a) described above, and proceed to P
Returns if not in mode.

If it is not the M mode in step (#1865), it is determined whether the mode is P in step ($11870). Here, when in P mode (Fbo, +・
0.0), 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 (#1875)
Proceed to and determine whether it is A mode, and if it is A mode,
The flow advances to step (#1885) and subsequent steps to control the aperture value reduction, and if not, the S mode is assumed and the flow advances to step (#1879) to control the shutter speed reduction.

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” HJ
) returns immediately.

The self subroutine when ON (IP+2='L J) is shown in FIG. 19 and explained. When the flag (SELFF) indicating self is set, it is reset L, (#945), self exit the mode,
If it is not set, a flag (SRLP) 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 ($1445) where photometric data is input from the photometric circuit (LM) and spot photometric values used for exposure are created. Here, creation of photometric values will be explained with reference to the photometric range shown in FIG. 14 and the flowchart for inputting and creating photometric data of the microcomputer (μC) shown in FIG.

In FIG. 20, the microcomputer (μC) first determines in step (#1600) whether or not a flag (AELF) indicating AE flock is set, and then
When F) is set, the photometric value is not updated and the process returns. When the flag (AELF) is not set, the terminal (C8LM) is set to "H" level, the photometry circuit (LM) is commanded to output photometry data, and serial communication is performed (#1605. #1610
).

Through this communication, the brightness values (Bvl to Bva) of the four photometric ranges shown in FIG. 14 are input. When communication is completed, the terminal (C8LM) is set to "L" level (#1615
). Next, in step (#1617), set BV2 to Bvc.
Input the value of BLIAUE in step (#1618), proceed to (#1622), determine whether the flag (AFNF) indicating that it is not in AF mode is set, and then in step (#1624), proceed to BLIAUE (#1622). Determine whether the flag (LCONF) indicating that it is possible is set,
If either one is set, proceed to step (#1660) and set the small photometry range (
LM2) is the spot value (Bvsp). Flag (A
When FNF) and (LCONF) are not set, the distance is calculated from the feed pulse, and based on the calculated distance information and focal length information, the image magnification β is calculated from β=focal length/distance (#1625). , in the next step (#1630), this image magnification β is set to a predetermined value (
K) Determine whether or not the above is the same, and determine the size of the subject that occupies the photographic screen. If it is greater than or equal to the predetermined value, it is assumed that the subject is large, and in step (#1640) each photometry range (LMI
), (LM2), (LMa) brightness values (By+)
, (BV2), and (Bva) is taken as the spot photometric value (Bvsp).

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, which flag (AFIF - AF
The range is determined by whether the flag (AFIF) is set, and if the flag (AFIF) is set, the brightness value (Bvl) of the photometry range (LMI) is determined, and if the flag (AF2F) is set, the range is determined. is the brightness value (Bv2) of the photometry range (LM2), and when neither flag is set, that is, when the day focus amount of the third island (AFa) is selected, the brightness value (Bv2) of the photometry range (LM3) is B
va) are respectively spot photometric values (Bvsp) (#1
645~#1665).

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

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

In FIG. 6, after controlling this AE block, the microcomputer (μC) performs data communication with the card for the third time in step (#455). To explain this data communication with reference to FIG. 5(c), the microcomputer (μC) determines whether communication (m) is present or absent based on the signal input from the card, Tokisu turn. It is empty when no card is installed. When there is communication (I [I), set the terminal (C8CD) to r) (J level #35
Set the data (#352) and insert the IC card (CD
) (#355).

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

This data output subroutine is shown in FIG. 5(g) and will be explained. First, it is determined from the data communicated at the time of communication (■) whether a group is specified (#362-1).

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

Go, Gl, G2. G3 data is lens drive and AE
With the data for calculation, =79- G3Lpmax...Lens maximum extension amount, and then determine whether data of group G is necessary or not based on the data obtained in communication (II) ($13 El 2-4) . Return if not needed. If necessary, set the address G1 of the Gl data (#362-5), and perform serial communication three times (#362-6). Next, it is determined whether the data in G2 is necessary or not, and if necessary, the address G2 is
and 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 not specified as a group, set the address based on the address with the required data entered from the card.#
362-7), serial communication = 81 is performed as many times as the number of serial communications input from the card (#362-8). Note that there is no addressing type for communication (m).

Upon completion of the above-mentioned card data communication (m) in FIG. 6, the microcomputer (μC) proceeds to step (#480) and performs exposure calculation here.

The flow of this control is shown and explained in Figs. 23 to 27. In Fig. 23, the microcomputer (μC) first outputs the light emission signal, which is the output data to the electronic flash device, by forcing 19 0N=O
, forced 0FF=0. Cancel GN control and initialize to 0 (#2000 to #2003). Next, step (#20
04), it is determined from the input lens data whether the lens is attached, and if it is not attached, the photometric value (BVAM) of the photometric range (LMa) (
Instead of this, the overall averaged photometric value may be used), film sensitivity (Sv) and exposure compensation value (ΔEv) are added,
Calculate the shutter speed and return (#2005).

If a lens is attached, determine whether it is forced P mode based on the data input from the card #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 (112010 to #2040).

Therefore, the exposure calculation for P mode is shown in Figures 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 (BVITM) of the photometric range (LMJ) and the spot photometric value (Bvsp) obtained in step (#445).
) is 2Ev or more (#21
00). If it is 2Ev or more, it is determined in step (#2105) whether an electronic flash device is installed (switch SM of the electronic flash device is ON), and if it is installed,
The control exposure value (Ev) is changed to the photometry value (LMJ) of the photometry range (LMJ).
BVAM) etc., Ev== BVah + Avo+5
Find it by v-1+ΔEv (#2115). Here, the reason for subtracting 1 is to make the background appear to be over IEv to make it look like it is backlit. In addition, I am trying to properly expose the main subject using a flash from an electronic flash device.

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

The program I is shown in FIG. 24(b) and explained as follows.
Tuning the shutter speed control value (Tvc) = 7
(SS1/125), and the aperture value (Av) is the exposure value (
Determine whether this aperture value (Av) is greater than 7 (F/11) or not, and if it is, limit the control aperture value (Avc) to 7. and return (#2215). When the aperture value (Av) is 7 or less, the calculated aperture value (Av) is equal to the open aperture value (Av
o) Determine whether it is smaller than or not, and if it is smaller, set the open aperture value (Avo) to the control aperture value (Avc) #2225
), if it is not small, the calculated value (Av) is changed to the control aperture value (A
vc) (#223. And the GN of the electronic flash device
Set to 1 to release the restriction (#2235), set the light emission signal (#2240), and return. This is because when the aperture is retracted and the GN is limited, such as when there is backlight, the main subject may not be photographed properly under strobe light, and if the camera is in P mode, the photographer's intention is not very clear. We are also considering this.

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+ΔEv (#2130), proceed to the program ■ subroutine (#2135) to find the aperture value (Av), and shutter speed (Tv), and proceed to step (
#2170) and returns.

This subroutine is shown and explained in FIG. 24(C).
First, in step ($12250) set the aperture value (Av) to Av
= 5/8Ev -2578, and this aperture value (A
v) is larger than the maximum aperture value (Avmax) of the lens (#2255), and if so, the maximum aperture value (Avmax) is set as the control aperture value (Avc) (#2
Proceed to step 26 (#2280). Step (#
2255), the aperture value (Av) is the maximum aperture value (Av
max), the aperture value (Av) is equal to the maximum aperture value (Av).
v.

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

In step (#2280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). In the next step (#2285), it is determined whether this is greater than the maximum shutter speed (Tvmax), and if it is, the control aperture value (Avc) is Shutter speed (Tvc) (
Tvmax), if it is not large, it is determined in step (#2292) whether or not it is slower than the slowest shutter speed (Tvmin), and if it is slower, (Tvmin) is controlled. Toshiku #22
93), if it is not slow, set the calculated shutter speed (Tv) to the control shutter speed (Tvc) #2295), and reset the light emission signal to 0) to prohibit light emission (#229).
8), Return.

Returning to FIG. 24(a), in step (#2100), when the difference in Buah Bvsp is less than 2, it is determined that there is no backlight condition and the process proceeds to step (#2145), where the average photometry of the photometry range (LM+) to (LMJ) is performed. Value (BVI+BV
Obtain the exposure value (gv) from 2+BV3+BVJ)/4, determine the aperture value (Av) and shutter speed (Tv) using the program ■ mentioned above (#2150), and set the shutter speed (Tv) to the camera shake warning speed (Tv= 6.1760
) (#2155). Then, when the speed is less than the camera shake warning speed, it is determined whether an electronic flash device is attached (#2160), and if it is attached, a flash flash program is executed (#2160).
2165) 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, $12305 and $12345). If it is not installed, calculate the exposure value (Ev) from the average metering value, and subtract the set aperture value from this exposure value (Ev) to determine the shutter speed (Tv) (#2315. #2320
). Then, in the next step (#2325), the shutter speed (Tv) is set to the maximum controllable shutter speed (
If it is larger than the maximum shutter speed (Tvmax), in step (#2330) the maximum shutter speed (Tv
max) as the control shutter speed (Tvc) and proceeds to step (#2345). If not, it is determined in step (#2331) whether the speed is lower than the controllable minimum speed (Tvmin), and if it is low, (Tvmin) is set to the control shutter speed in step (#2333). (Tvc), and if the speed is not lower than (Tvmin), the calculated value (Tv) is set as the control shutter speed (Tvc) in step (#2335), and the process proceeds to step (#2345). In step (#2345), the set aperture value (Av) is made to become the control aperture value (Avc).

Next, the control in S mode is shown in FIG. 26 and explained. First, in step (#2400), the exposure value (Ev
) is calculated from the average photometric value, etc., and it is determined in step (#2405) whether or not an electronic flash device is installed. If it is installed, in step (#2415) it is determined whether the shutter speed (Tv) is 7 or less. If it is 7 or less, the set shutter speed (Tv) is set as the control shutter speed (Tvc) (#2420), and if it exceeds 7, the synchronized speed 7 is set as the control shutter speed (Tvc). Proceed to step (#2430).

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

In step (#2405), if it is not attached, the set shutter speed (Tv) is set as the control shutter speed (Tvc) and in step (#246)
Proceed to step 30) and execute the subsequent flow.

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

Returning to Figure 6, after completing the exposure calculation (#460), the camera's microcomputer (μC) determines whether there is a signal requesting an extension of the time required for communication (IV) from the card (#461). , if there is, wait for 10m5ec ($14
63), if there is no requested signal, do nothing and perform the fourth data communication with the IC card (CD) (#
465).

This request signal is sent because the calculation time is long in the case of a differential focussing 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 (C8CD) to r)(J
level (#367), performs serial communication with the IC card (CD) (#375), and notifies the IC card that the IC card is on the output side. 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). Set the address of the input register in the camera and perform serial communication a predetermined number of times. The contents of the data are as follows for the addressing type: (i) for a custom card, for the card;

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

Go...Display data being set...Nine serial communications b, ~b7...missing number" G2...ΔLp...Lens drive pulse...
...One serial communication Returning to Figure 6, when data communication (IV) with the card is completed, the microcomputer (μC) outputs data to the electronic flash device (ST) ($1467)
. This is shown and explained in Fig. 11(b).The microcomputer (
μC) must first determine whether or not the card function is ON based on the data input from the card #467-1)
If not, proceed to step (#46710). When it is ON, the steps of forced ON, forced OFF, and GN restriction release 1 flash are performed based on the control signal of the electronic flash device input from the card (#467-2) (#467-4)
(8467-6) (#467-8), and if the control signals indicate forced ON, forced OFF, GN restriction release, or non-emission, step them (#467).
-3), (#467-5).

(#467-7), (#476-9), and if the above four are not shown, (#467-3°
), (#467-5'), (#467-7")
(#467-9”) to reset the respective signals and step (
Proceed to #467-10). Step (#467-10)
Now, connect the terminal (C8FL) for a certain period of time (T2)'H
J level to indicate that the camera is in data output mode to the electronic flash device. The camera has an input/output switching circuit (
IloCG) is set to the output side (rHJ), waits for predetermined processing within the electronic flash device, and performs serial communication once (#467-11 to $1467-13).

When data communication with this electronic flash device is completed in Figure 6,
The microcomputer (μC) executes the card control flow of step (#470). This flow describes how to determine whether or not to control the camera using an IC card (in this case, a program card) based on input data, and how the camera operates when this is done. To explain it as shown in Figure 28, a microcomputer (μC) is first an IC.
Based on the data input from the card, it is determined in step (#2610) whether or not the camera is controlled by the card, and if the camera is not controlled by the card (CDFNF=0)
returns.

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

If the above data is not (Av) or (Tv) data,
It is determined whether the data is (ΔAv) and (ΔTv) (#2635). If the data is not (ΔAv) or (ΔTv), the process returns. (ΔAv), (ΔTv
) data, the control aperture value (Avc) is set to (ΔAv
) is added to the control shutter speed (Tvc), and (ΔT
v), add (ΔSv) to the film sensitivity (Sv), and return (#2640 to #265).

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

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

Shutter speed °... Shutter speed data or card name data is stored here using 1 byte.

Aperture value・・・・・・・・・Aperture value or numerical value (
Setting data when using a card) is stored in memory, and BO flashes for 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. ba, ba
controls blinking, lighting, and extinguishing of data b4 to b6.

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

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

Card display...b+, ba (address DP6H) are the data for lighting and turning off the +/- exposure compensation display, bs, be (address DP6H)
controls the selection of single shooting/continuous shooting and turning off the display, bo, b
+ (address DP7H) indicates flashing/lighting of the card display.
Light-off control data, ba, bs (address DP7H
) respectively indicate multi-point AF/spot AF switching display and light-off control.

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

Control data: Data indicating the camera sequence, bo: All lights off (main switch 0FF) bl...
・Standby (main switch ON, SI 0
FF) ba...Card display ba...Initial load b4...SI 0N bs...Rewinding LED Infiner indicator...bo...Focus display presence/absence... - Presence/absence of focus detection ba...Presence/absence of tracking mode ba...Presence/presence of multi-point AF b4...AF/M are shown, respectively.

A flowchart of the display microcomputer that controls this display is shown in FIG. 29(b) and will be described. Display control circuit (DI
SPC) to the camera microcomputer (μC) terminal (C8DI
When a signal that changes from "L" to "H" is input from SP), the interrupt shown in Figure 29 (b) is executed, and 11 bytes of display data from the camera (see Table 5) are serially communicated. (#D-5). It is determined from the input control data whether or not it is in the all-lights-off mode. If it is in the all-lights-off mode (DPIH, bo=1) in step #D1, all lights are turned off without displaying anything (#D-15). If it is not in all-off mode (DPIH, bo = 0), determine whether it is in standby mode or not #D-20), and if it is in standby mode (DPIH, b+・1), the currently set AE mode The display is based on the bo and b+ of DhH (#D-25). The position of the cursor (Δ) is displayed based on the card display based on the information of DP6H and DP7H, and the data change display data of DPIIH, and the other lights are turned off. An example thereof is shown in FIG. 29(c). Second
FIG. 9(c) shows the display of P mode, card function enabled, △ mark (cursor) at the exposure compensation position, exposure compensation mode disabled, single shooting mode, and multi-point AF.

If it is not the standby mode in the step (#D-20), it is determined whether or not it is the initial load (#D
-45). When the initial load is (DPsv, b
a=1), only the film number display (DPSN) and Patokan/Pero display are displayed, and the other lights are turned off (#D-
50~#D60). FIG. 29(d) shows that the film is loaded and is in the initial load state. During rewinding (DPen, bs=1), "-" in Figure 29(d)
The display shows the number of films currently being rewound.

When not rewinding, determine whether a card is displayed (#
D-70). When displaying a card (DPIH, b2=1)
, decodes the data of DPIH and displays the card name, displays the numerical value based on the data of DP2H, b of DP3H
2 to b6 are used to display what is selected (selected) by the IC card, and furthermore, numerical values are displayed based on the data of DP4+, and card display is controlled based on bo and b+ of DP7H (# D-75 to #D-95). The display of this card will be explained in detail later. Step (#
If the card display mode is not determined in step D-70), proceed to step (#D-105) and turn on the switch (Sl).
If it is turned on, the in-finder display is performed based on the in-finder information (#D-110), and if it is not turned on, the in-finder table =98= is displayed. 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 DP2H information.
DP2o's. , AE mode display based on bl;
Display of film number based on DP3H, button display based on DF'4H, card related display based on DP6H17H information, data change (Δ) display based on DPen information b6 of DP9□. b7. Dp+
. 8th. The AF mode and self are displayed based on (#D-115 to #D-155). An example of this is as follows:
A flowchart of display control (creation of display data) on the camera side is shown in FIG. 29(a) and will be explained first.
#2700), it is determined whether the card display control is being performed or not based on the data obtained in the communication with the card (II), and if it is the card display control, the mode is set to output the information input from the card as is. , performs serial communication 12 times (#2705 to 2730). On the other hand, when not controlling the card display, serial communication is set to 12 as a mode (#2710) to output data created by the camera (shutter speed, aperture value, number of films, etc. - see Figure 29 (e)).
(#272) Next, in step (#2735), it is determined whether the card side has the authority to control the buzzer based on the data input from the card, and if the card side has the control authority, it is determined whether the card side has the authority to control the buzzer or not. , determines whether there is a camera shake warning signal from the card (#2740).If it is a camera shake warning, a buzzer warning is issued regardless of whether or not there is a buzzer warning from the custom card (#2745), and step ($2
765). If it is not a camera shake warning, proceed to step (#2765) without issuing a buzzer warning. If the card does not have the buzzer control authority, it is determined whether the shutter speed determined by the camera is less than 6 (#2750), and if it is not, the process proceeds to step (#2765). If it is less than 6, determine whether the card function is ON based on the data input in communication (II), and if it is not ON, determine whether there is a buzzer warning based on the data in the E2PROM in the camera.# 2754), a buzzer warning is issued if there is a buzzer warning, and if there is no buzzer warning, the buzzer warning is not performed and the process proceeds to step ($12765).

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 0- control described above. If it is a custom card, determine whether or not there is a buzzer based on the communication (IV) data input from the card #2760), and if so, issue a buzzer warning #2756), proceed to step (#2765), If there is no buzzer warning, proceed to step ($12765). In step (#2765), it is determined whether there is a write control signal from the custom card to the E2PRO, and if there is a signal, data from the custom card is written in communication (IV) (#2770); Step (
Proceed to $12,775). When there is no write control signal, step (#2770) is skipped and step (#2770) is skipped.
2775).

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

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

Now, in the flow of Fig. 29(f), the microcomputer (μC
), first check E2 to see if the settable exposure mode has been changed.
Compare the FROM data and the data input from the IC card (CD) to make a judgment #3203), and if they are different (that is, there has been a change), force the exposure mode to P mode. Change data (Fbo, Fb+) to (0, O) ($13205) and return.

After completing the display control ($1471) described above in FIG. 1) Determine whether 10 seconds have passed (
#474). If the time has elapsed, the process advances to step (#490) to perform exposure control. If 10 seconds have not elapsed, return to step (#180). When self-timekeeping is not in progress (SLP=O), proceed to step (#473) and determine whether or not the release switch (S2) is turned on. If it is not turned on (IF5-"H")
Then, the process advances to step (#520), allows all interrupts, and returns.

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

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

Step (#481) to proceed to (IP+2-'HJ) when not in self mode in step (#475) of FIG.
), manual focus mode (MFF=1
(Focus lock or manual focus adjustment using only focus detection)], and if it is the manual focus mode, the process proceeds to step (#490). When not in manual focus mode, step (#485)
Proceed to. In step (#485), a flag indicating focus (
AFEF) is set, and if it is not set, the process returns through step (#520). When it is set, the process proceeds to step (#490) to prohibit all interrupts in the same way as when the AF mode is not set, and then, in step ($1492), communication (V) with the card is performed. This is shown and explained in FIG. 5(e).

First, the microcomputer (μC) determines the presence/absence of communication (V), returns if there is no communication, and returns to the terminal (C8C) if it exists.
D) to the rHJ level (#390), set data indicating communication (V) (#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 #394
), input the camera side (#385), perform serial exchange eight times (#396), set the terminal (C8CD) to "L" level (#397), and return. This data is data for the memory card memory.

Here, to explain the data contents in the CAHCD table, (
i) Number of films (ii) Open FNO (iii) Control F value (iv) Control shutter speed (v) Exposure compensation value (vi) Exposure mode (vii) Exposure mode (viii) Film sensitivity. After completing the communication (V), the microcomputer (μC) advances to step (#495) and performs exposure control (described later), and then winds the film one frame in step (#500) (this is also (described later), release switch (S
Determine whether 2) is ON or not in step ($1505),
If it is ON (IPv-r L J ), it is determined whether a forced continuous copying signal from the card is being input. If it has been input, the process advances to step (#515); if it has not been input, it is determined in step (#510) whether or not it is continuous shooting mode, and if it is continuous shooting mode (Fb3
= 1), enable all interrupts in step (#515) [
Proceed to the SO3 routine. When not in continuous shooting mode (Fb
3=O) returns to step (#505) and waits for the release switch (s2) to be turned off. When it is turned off, all interrupts are enabled in step ($1520) and the process returns.

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

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

In the next step (#2815), the control aperture value (Avc
) to perform aperture control and start mirror up. Next, the lens is driven during release. This is the 30th
As shown in Figure (b), first, it is determined whether the card function is ON or not (#2822-0), and if it is ON, there is a snap drive bit signal indicating lens drive during release inputted from the IC card. Step (#2822-
If it is determined in step 1) that there is no signal indicating card function OFF or snap drive, proceed to step (#2822-4) and wait for mirror up to be completed. ”) Return. When the above signal is present, the lens drive amount (Δn
) (#2822-3), stop the lens (#2822-4), and wait for mirror up to be completed (#2822-5). Mirror up is completed (Eng. P2
o=“L”) and returns.

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 (#2830-0), and if it is OFF, the process returns.

If it is ON, it should be determined whether there is a snap drive bit signal (#2830-1), and if there is, the signal opposite to the above (Δ
n) (#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 (CNT) at the current position of the driven lens is set as CT'” #2830-6
), the difference (Δ
n) and (#2830-7) step (#283
0-2), performs the same control as described above, and returns.

The Tv control routine in step (#2825) of FIG. 30(a) is shown in FIG. 30(d) and will be explained. First, the microcomputer (μC) changes Tv to exposure time (T) (#2835), The timer for measuring exposure time is reset and started (#2836), and the first act (not shown) is started (#2837). Then, determine whether the card function is ON or not (#2838), and if it is OFF,
The flow moves to wait for the exposure time (T) to elapse (82846). On the other hand, if it is ON, it is determined whether or not it is a defocusing card (#2839). In the case of a deforming force card, the pulse curant at the current position of the lens is set as CT” in memory L (#2840), and the exposure time (T) is set to T.
/4 (#2841). When it comes to T/4,
Detect the driving direction from the (ΔLp) information input from the card to the far side or the near side (#2842), set the direction accordingly, and drive the lens at the highest speed (#2845)
. At this time, the counter that monitors the lens extension position is still operating. At this time, or when the card is not a deformation force card, the exposure time (T) is reached (#2846), and when it reaches T, the second act (not shown) is started (#2847) and the run is completed. Wait for a certain amount of time (#2848), stop the lens drive motor ($12849), 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 ('
ri) (#2850. #2
855).

This timer winds the film to the last frame,
This is a timer to detect when the film is stretched. The microcomputer (μC) is a switch (Swn) that indicates that one frame has been wound in step (#2860).
It is determined whether or not the motor is OW, and if the CN is not ON, it is determined in step (#2865) whether 2 seconds have elapsed in this state, and if 2 seconds have elapsed, the motor is controlled to stop ( #2870), assuming that the film is taut, control the film tautness (#2875), then set the cancel signal to 1 to cancel bracketing or auto shift, which is continuous shooting, #287B), and communicate data. Perform the work (#2877) and return. The above-mentioned subroutine is shown in FIG. 31(b) and will be explained. A signal is output to reverse the motor (#2930).
), the film detection switch (SFLM) is turned off.
($12935), and then turn the switch OFF.
When F is reached, the motor is stopped (#2955) in order to wind the film into the cartridge chamber, and then the process returns.

Returning to FIG. 31(a), when the 1-frame winding completion switch (SLIDON) is turned on in step (#2860), the motor is stopped in step (#2880), and then in step (#2890) ), the count number (N1) of the counter indicating the number of completed film shots is incremented by 1, and the process proceeds to step (#2900). In step (#2900), this number of films (N,)
Write to E2FROM.

Next, when the back cover close detection switch (SRC) or the rewind switch (SRw) is operated, the terminal (INT2
), the microcomputer (μC) executes the interrupt (INT2:l) shown in FIG. 3000), then step (#
3005), it is detected whether the rewind switch (8Rw) is turned on. If it is ON, execute the [Rewind] routine shown in FIG. 31(b) to perform the rewind operation, permit interrupts, and return (#3
010). When the rewind switch (S+tU) is not turned on, it is assumed that the camera back close switch (SRn) is turned on, and the cancel signal (used in data communication ■) is set to O to restore the bracket function or auto shift function. (#3012) The process proceeds to step (#3015) to determine whether or not a film exists. If there is no film, the film detection switch (SFL) is turned off.
In case of F, step (#
3100). On the other hand, if the film is present (i.e., SFLM is 0N (7)), the terminal (C8
DX) to rHJ L/bevel, perform serial communication with the film sensitivity reading circuit (DX), input the film sensitivity data (Sv) and the number of film exposures (N), and when the communication is finished, connect the terminal (C3DX) to Set to “L” level (#
3020~#3030). Then, set the number (N1) to -2 (#3035), then set the terminal (C8DISP)
rH" level, performs serial communication with the display control circuit (#3045), and outputs a signal indicating initial load (DP
9Hb3=1) and the number of film sheets, thereby preventing data other than the data indicating the number of film sheets (N1) from being displayed. When serial communication is finished, set the terminal (C8DISP) to “L” level (#3050)
. The value of the number of films (N1) is displayed using two 7 segments. Next, the microcomputer (μC
) outputs a signal indicating motor winding to the winding control circuit #3055) and waits for one frame to be wound (#3
060), when the 1-frame winding switch (sl, D) is turned on, 1 is added to the number of film sheets (N1), and it is determined whether or not it has become 1. If it has not become 1, step (#
Return to 3040). If it is 1, step (#
3075) to stop the motor and proceed to step (#3
095). Then, in step (#3095), the number of films (Nl) and the film sensitivity are set to E2P.
Writes to a predetermined address in the ROM, and after writing is completed, all interrupts are enabled (#3100) and the process returns.

It should be added here that in this embodiment, setting and resetting the flag and setting the bits to 1 and 0 are the same.

In the above, the microcomputer (μC) on the camera side of this embodiment
Although various flowcharts have been explained with a focus on the operations, the control operations on the side of the IC card attached to this camera will also be explained using flowcharts. In addition, each type of card will be explained. The IC card (CD) has a built-in microcomputer (μC2) with a built-in E2FROM.

Next, the operation of the close-up card will be explained.

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

Close-up card〉 The close-up card is the 33rd card when attached to the camera.
Executes the reset routine shown in the figure, flags, registers (
Reset all RAM) and go to sleep.

Next, when the camera sends a signal that changes from "L" to "r" (J) to the card's terminal (C8CD), the card executes the interrupt shown in Figure 34.Here, the card
Perform serial communication once in synchronization with the clock sent from the camera to input data indicating the type of communication (
E-15).

From the data from this communication, determine the type.E-2
In the case of communication (I), the card is used as a data input side (E-25), serial communication is performed (E-30), and data (see CAHCD) is received from the camera. Execute the data setting subroutine based on this data.
30), Sleep.

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

In communication (I[), FL forced 0N (=1) C8II -1
-bl・ON restriction release (=1) C8I[-
1-BS/Whether or not the card performs display control C8II-
1-b4・Card function 0N10FF C8I
[-1-bs・With/without camera shake buzzer C8II
-1-bv/P shift prohibited (・1) C8
II-2-b.

・Forced P mode (=1) C8II -2-
bl/V No communication (0) C3II-2
-be release prohibited (=1) C8m -
2-bs・AF Rawanhot (=1) cs
II-2-be・TV, Av/display data C3
I[3bs・No.■Communication present (=1) C8I
I-3-b4・No. ■Communication (=1) C
8II -3-bs・Group specification (=O)
C8n -3-be・Photometering loop repetition
C8II-3-t) v・Hand shake reflexor control (=1) c
s■-4-b.

-AF spot (4) C3lI -4-
bl・o-:+n scan prohibited (□1) C3lI
-4-be In the above, AF raw shot means prohibition of AF tracking mode after focusing by the camera.

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

In addition, all signals other than the above are set to "0", and the * mark on the front is set to "1" or "o" depending on the time, and "1" is set.
When , the control is ON, and when rOJ, it is OFF. “O” for things that are already decided.

Decide on "1". In communication (n), in order to specify group 1 of communication (III) in group communication, C8n -9-bl =1. There are two types of communication (IV): display and control data, so C8II-10-bl,
b2=1.1. Otherwise, it is set to "0".

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

In the communication (Vl), a signal indicating that the sleeve is available is sent. This is because there is no write control to the E2FROM.

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

Step (E-16) checks whether the DISREQ (card name display request) signal obtained in communication (I) is "1" or not.
0), and if it is "1", set the display control data to "1" and set the card display function 0N10FF to 0N (1).
(E-170, E-175). Next, select the flag (S
IF) is set or not. E-200
), if it is not set, this flag (SIF) is set as if this flow is going through for the first time (E-20
5) Reset and start the timer (E-21
0) Proceed to step (E-215). Flag (SIF)
Even when is set, step (E-215)
Proceed to. In step (E-215), it is determined whether the timer has elapsed for 10 seconds. If 10 seconds have not elapsed, set the photometry loop repeat signal to "1" and set E-2.
20) Set the card display name and data for displaying the card only (E-222) and return. This display is shown in FIG. On the other hand, if 10 seconds have passed, set the photometry loop repetition signal to rQJ (E-225), reset the flag (SIF) (E-226), set the display control data to "0" (E-227), Return.

If DISREQ=O in step (E-160) above, proceed to step (E-162) and
(i.e. switches sE, l, 5FUN, 5CD
Determine whether either I5cns or S+ is ON) and reset the display flag (display F) that indicates control to display the card name when it is "L". E-163)
If it is not "L", do nothing and step (E
-165). After resetting the flag (SIF) in this step (E-165), the process proceeds to step (E-260) in FIG. Determine whether

When the value is "1", a return is made to prohibit control by camera switch operation (card related). When the self signal is not “1”, step (C) in FIG.
E-430) and turn on the card switch (SCD)
card switch (SCD)
When is OFF, reset this flag (ScnF) (E-460) and determine whether the display flag (ScnF) is set (E-465). If not, return. If it has been set, the process advances to step (E-170) and the display of the card name is controlled. Card switch (Sep) at step (E-430)
) is ON, it is determined in step (E-435) whether or not the flag (ScnF) is set, and if it is set, it is determined that the switch continues to be operated and the process proceeds to step (E-465). When not set,
To reset this (E-440), it is determined in the next step (E445) whether or not the card function is currently ON, and if it is ON, it is set to 0FF (communication (n) data) (E-440). 450) Return.

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

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

If it is not communication (I[), check whether it is communication (III) or not (E-51). If communication (III), enter the card side (E-52) and perform serial communication 15 times. (E-53), inputs camera data, performs the next step (E-54) calculates data for controlling the camera (including exposure calculation), and goes to sleep. This calculation will be described later. If not communication (I), communication (IV
), E-55), communication (IV), data is output side E-60), display control, E-65), display control. It is assumed that display data is to be output (E-70), an address is set, serial communication is performed nine times (E-75), and the device goes to sleep. When not display control (Tv, Av data) Specify the address of Tv and Av data, perform serial communication four times, and go to sleep. When it is not communication (■), it is assumed to be communication (VI), and first performs serial communication according to the clock from the camera on the data output side (
E-25) Sleep.

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

First, in step (E-500), the camera shake limit TLIH is determined from the focal length f using the formula Tv+=1.25X1og2f150 +5.875, and this TVH limit is determined in step (E-505).
~ (E-520).

Next, in steps (E-525) to (E-535), the shutter speed that determines the flickering light emission is set (TV
Processing is performed to find the smaller of H) and (TVX). Incidentally, here, the Tvx tuning speed is expressed. Next, in steps (E-544) to (E-570), the control limits of the control shutter speed (Tvc) and the control aperture value (Avc) are determined from the control limit exposure value. In the next step (E-575), it is determined whether the image magnification β is valid or not. If it is not valid, proceed to the flow after step (E-670), and if it is valid, proceed to step (E-580). It is determined whether β≧1. Here, when β≧1, the characteristics of this close-up card cannot be utilized, so the card function is turned off (
E-585), return. When β<1, the process proceeds to step (E-590) to determine whether β<1/4. Here, when β<1/4, step (E-670)
Proceed to step (E-595) when β>1/4
Avβ is calculated according to the formula Avβ=7−log21/β. The situation in this case is shown in FIG. 38, and the program diagram is shown in FIG. 39.

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

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

When TV≦TVmax, it is determined whether TV<TvF, and if TV≧TvF, TVc is set to TVL, then step #660G: Proceed.

When TV<TVFte, control aperture value (AVc) is changed to EV
S-TVF Determine whether AVc<AVmin If AVc<AVmin, AVc=AV
min, and recalculate TVc as EVS-AVC, (
Proceed to #660). When AVc≧AVmin, TVc
Set it as TVp and proceed to Te (#660). Exposure value (EVs)
Determine whether or not is greater than or equal to TLIF +Avmin, and EVs
When <TVp +AVmin and the flash is ON, proceed to flash control.

E-725: Calculate background exposure value EVa=BVa+SV.

E-730...To make the background IEV7:/der,
EVc=EVo+1. This is because the background light and strobe light are used to properly expose the main subject.

E-735-Shutter speed TV=EVC-AVC Te (7) TV7! l<TV)l (whichever is slower between TVp camera shake limit speed and TVxE-775 synchronization speed) is determined. , if it is less than TVmin, the limit value is set as Tvc=Tvmin and the process proceeds to E-780.

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

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

β≧1/2 → TTL=χ 1/2≧β≧1/3→ TTL=χ+0.251/3≧
β≧1/4→ TTL=χ+0.51/4〉β →
Assuming TTL=χ10.75, if the subject occupying the screen becomes smaller (β is small), the amount of reflected light returned from the subject will decrease, the light adjustment completion signal will be delayed, and the amount of light emitted will increase. The image will be overexposed. In order to correct this, the amount of light emission is reduced as β becomes smaller. When β cannot be used, assuming that there are many subjects with 1/4>β, TTL=χ+0.75 is set.

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

This dimming level calculation is shown and explained in FIG. 37(C).The exposure value (EVc) is calculated from AVc+TVc,
- Determine whether EVs (exposure value of main subject)>O.

When EVc-4Vs≦0, the correction amount is set to χ=1.5,
Set the light emission amount (light control amount) to under, so that the main subject is not overshot, and proceed to E-840.

When EVc-EVs>O, it is determined whether EVc-EVs>3, and when EVc-EVs>3, the correction amount χ=0 is set and the process proceeds to E-840. EVc-EVs≦3
When χ=1/2 (EVs-EVc+3), E-
Proceed to 840. Determine whether the image magnification (β) can be used,
When usable (#660), EVs≧TVF +AVmi
Hand shake detection is performed when the flash is off or when the flash is off (including when the flash is not attached). Camera shake detection is the same as for sports cards.

In #775, the camera cannot be released unless the camera is in focus. If the camera is not in focus immediately, release is prohibited/set to 1.
If the camera is in focus, it returns as release prohibition = 0.

When β information is not valid or when β<1/4#
Proceeding to 670, in the above step (E-670) Av+
The calculation is Ay, = Avmin+ −Evs −(Avmin+
TvH). Step (E-680) ~
(E-695) performs limit correction of the aperture value, calculates the control shutter speed from the determined control aperture value (TVc), and #
Proceed to 660.

Table 7 shows an example of the RAM map in the H.26 camera. In the case of such a RAM (including E2FROM) map, the data (Go, Gl, G2) group key is communicated.

, MPa, MP+o are required, and if a group is specified, the above Mh, MP3. It is sufficient to memorize the start address and number of Mho and read them in response to a signal. These are compatible with existing card systems because they only read fixed data. However, if a new card with other functions is created and, for example, the other data MP2 and MPa are required, the other data cannot be read. To make this possible, it is necessary to directly specify the start address of the data and its number (direct addressing type)
. However, at that time, the data (for example, MP
2 data and XP7 data), all data from MP2 to MPv will be specified, resulting in wasted data transfer (memory and time). In this embodiment, data is transferred efficiently by using these methods.

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

Table 2 (Continued) Table 2 Table J1 - 4 Table 33 - IJZ Table 4 (Continued) 137 - Table 7 Table 1 (Continued) Table 2 (Continued) Table Lens (I) Table Lens (II) Table! According to the present invention, scanning is prohibited in close-up shooting mode, so even if the focus is slightly off,
In cases where the image quickly returns to its original position (for example, when a leaf is moved by the wind but immediately returns to its original position), scanning does not cause the inconvenience of having to wait for a long time before focusing.

Further, when using an accessory with a close-up photography control function, this accessory outputs a signal to prohibit scanning, so that scanning is automatically prohibited when the accessory is used, which is convenient. At this time, if the accessory is composed of an IC card, the accessory will be small and lightweight.

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

Claims (3)

[Claims] (1) In a camera system that has a scan function that moves the lens to search for a measurable area when the distance measurement detection signal for autofocus is unable to measure distance, the scan function is forced when shooting close-ups. A camera system characterized by having a means for disabling the camera. (2) It has a camera body and an accessory that can be attached to and detached from the camera body, and the camera body has a lens that searches for a measurable area when the distance measurement detection signal for autofocus is not available. a receiving circuit for receiving a signal from the accessory; a determining means for determining whether the signal received by the receiving circuit prohibits scanning; and the determining means determines that scanning is prohibited. The accessory has a prohibition circuit that disables the scan function when the camera body is scanned, and an accessory having a function of controlling close-up photography for the camera body outputs a scan prohibition signal. A camera system characterized by: (3) The camera system according to claim 2, wherein the accessory is an IC card.