JPS59100419A - Flash photographing device - Google Patents

Abstract

PURPOSE:To obtain proper exposure and to set an intermediate aperture value freely to obtain free set exposure, by controlling a diaphragm in the middle between an aperture value for flash photography and an arithmetic aperture value of distance, etc., when the former aperture value is smaller than that of the latter. CONSTITUTION:The left half part in a figure partitioned by a chain line A is a camera and the right half part is a flash lighting device. The aperture value signal outputting means AD is a maximum lighting signal outputting means which outputs an aperture value based upon the setting SS of subject brightness and film sensitivity Sv or aperture value Avf for flash photography. A comparing circuit CMP compares a signal Arf with the arithmetic aperture value signal Avd of an arithmetic circuit ALU1. A diaphragm APL is controlled by the Avf when the Avf is smaller than the Avd or by an intermediate aperture value Av when not. Therefore, when Avf>Avd, the limit quantity of under-exposure is reduced. In this case, Av=(mAvf+nAvd)divided by (m+n), where (m) and (n) are optional values close to 1.

Description

Detailed Description of the Invention Technical Field The present invention relates to a flash photography device, and in particular, in a photography device that has a degree of freedom in the aperture for flash photography, when the aperture aperture is inappropriate for the amount of flash light emitted, it is possible to obtain a predetermined exposure. The present invention relates to a flash photographing device having a function of controlling the aperture aperture so as to obtain the desired results.

Prior Art Conventionally, a flash photography device has been proposed in which the aperture aperture for flash photography is determined based on the amount of flash light emitted by the light emitting device at various photographing distances. Since the aperture aperture that provides the correct exposure is uniquely determined according to the shooting distance, if you use a flash photography aperture other than this aperture, you will not be able to obtain the appropriate exposure, which reduces the degree of freedom in determining the aperture for flash photography. There was a problem with the lack of time.

On the other hand, the aperture aperture for flash photography is determined according to the brightness of the subject or according to a manually set value, and the light reflected from the subject due to flash emission is measured through this aperture, and its integral value or a predetermined value is measured. Conventionally, a flash photography device has been proposed that stops flash emission when the amount of light is reached. In the case of this device, since the aperture aperture is variable, there is a degree of freedom in determining the aperture, and it is possible to use a flash photography device aiming at various effects. The advantage is that you can worry about whether the exposure is appropriate or not. However, if the aperture is narrowed down too much, the amount of light reaching the subject will be insufficient even if the flash device emits all the light, resulting in an underexposed photograph. Although it is possible to calculate the limit aperture value for proper exposure according to the shooting distance and the maximum light output of the flash device, this calculation and the operations associated with changing the aperture are often difficult for shooting names. Therefore, it has been desired to develop a device that automatically controls the calculation of the limit aperture value and the aperture change.

Purpose The purpose of this invention is to use a flashlight emitting device when taking a picture, and then automatically adjust the aperture needle to a more appropriate value.
Second, try to reduce the number of companies that are overexposed or underexposed.

In addition to providing flash photography equipment.

Summary In order to achieve the above-mentioned object, the present invention provides means for outputting a first aperture value signal for flash photography, means for outputting a first aperture value signal for maximum flash emission, distance information, etc. means for calculating a value signal; and if the 71st aperture value is more open than the second aperture value, the first aperture value is output;
If the aperture value is on the smaller side than the second aperture value, the aperture value is provided with selection output means for outputting an aperture value intermediate between the second aperture value and the first aperture value. As a result, when the aperture is small relative to the amount of flash light emission, the aperture aperture is widened to the above-mentioned intermediate aperture value to reduce the amount of underexposure.

Example An embodiment of the present invention will be described below.

In Figure 1, the left half of the dotted line A shows a camera whose aperture can be freely set, and the right half shows a flash device (hereinafter referred to as a strobe device). JF4) is a connection terminal on the strobe device side, (JB5) or JI'S8) is a connection terminal on the camera side, and the connection terminals indicated by dotted lines in the figure are connected to each other.

(J)S) is a shooting distance signal output means that outputs a signal indicating the distance between the camera and the subject, and the shooting distance signal is output by manually setting the objective lens of the camera, or by an automatic focus adjustment device (not shown) or distance detection. Output the distance signal I) obtained from the device.

(SS) is the film sensitivity setting EJ one stage, and a film sensitivity signal Sv is output. (ADO) is an aperture value signal output means of the camera, which outputs an aperture value signal Avf for flash photography, such as an aperture value automatically determined based on the subject brightness and film sensitivity Sv, or a manually set aperture value. Output. (MD0) is a maximum light output signal output stage that outputs the maximum light emission signal Lmax of the strobe device,
This signal is input to the arithmetic circuit (ALU1) as the first calculation means via the terminals (JF2) and (JB5). The arithmetic circuit (ALU1) calculates Ivmax-'cSvDv---Avd. This calculated aperture value signal Avd is the limit aperture value at the photographing distance Dv in the photographing state.

Comparison circuit (CMP) has aperture value I L output 17 stages (AI)
The aperture value signal Avf from 0) is compared with the calculated aperture value signal Avd from the performance circuit (ALUl), and Avf<Avd.
When it is “Low′′, Ayl) When it is Avd, it is mountain gh
1 signal is output.

The "warning" stage (RA') is set high by the comparator circuit (CMP).
When the Shinkyu is input, the non-indicating display element ■Tanae lights up the light emitting diode and moves to the above aperture 1.
In flash photography with fT:, the flash light emitting part is insufficient and proper exposure is not achieved)'
+i is not obtained, that is, it warns that underexposure will occur.

The oil dust circuit (ALU2) as a second calculating means performs calculation by inputting the aperture value signal Avf from the aperture value signal output means (ADO) and the calculated aperture value signal Avd from the arithmetic circuit (ALU). It is a circuit. Note that in the above formula, m
, n are set to arbitrary values close to 1, for example. Then, when Avf (AVd) and a "Low" signal is input from the comparator (CMP), the selector (SEL) outputs the signal Avf from the aperture value signal output means.
When Avd is input and a "High" signal is input, the signal AV from the arithmetic circuit (ALU2) is output. The aperture control device (CA) receives the signal A from this selector (SEL).
The aperture of the photographic aperture (APL) is controlled based on vf or Av.

With the above configuration, if the aperture value Avf is on the open side than the aperture value Avd, the aperture (APL) is controlled by the aperture value Avf. Further, when the aperture value Avf is smaller than the aperture value Avd, the aperture (APL) is controlled by the aperture value Av which is intermediate between Avf and Avd and is calculated by the above equation. Therefore, the amount of underexposure when Avf>Avd can be reduced.

In addition, by experimentally selecting m and n in the above equation, we can find an intermediate silence value A that actually restricts the camera when the gray value Avf is on the small aperture side. You can easily set it to something appropriate.

(S\) is an X contact that is linked to the camera shutter. When this X contact (SX) is closed, this closing signal is sent to the flash light emitting device's light emission control via terminals (JB7) and (JF3). A light emission start signal is sent to the circuit (FLC), which causes the xenon tube (XE) to start emitting light. Further, the closing signal of the X contact (SX) is sent to the light emission stop signal output means (FTT) on the camera side.

In response to this close signal, the light emission stop signal output means (FTT) starts measuring the light reflected from the subject due to the flash light emission that has passed through the photographic aperture (APL) of the ladder camera, and calculates the integrated amount of this reflected light. When a predetermined value corresponding to the film sensitivity is reached, a light emission start signal is output.

This signal is sent to the light emission control circuit (FLC) via the terminals (JB5) and (JF1), and stops the light emission of the xenon tube (XE). As mentioned above, a similar configuration can be used to control the aperture when the amount of light emitted is too high.

That is, a signal of the minimum light emission amount Ivmin is sent from the flashlight emitting device to the camera, and the camera calculates Ivmin+5v-Avl-Avd', and the selector (SEL) determines that Avf<Av.
When d', the aperture value signal AV・ determined by the calculation is output, and A
When vf>Avd, the output deviation of Avf is good.

FIG. 2 is a block diagram showing the overall circuit configuration of a camera system to which the present invention is applied. Note that the thick line portion (of the signal lines) is a signal line through which data of multiple bits is transferred.

In FIG. 2, (1) is a microcomputer or microprocessor (hereinafter referred to as μ-
(referred to as Cam). Power-on reset circuit (P
O, ) generates a power-on reset signal (PR, ) when the power battery (BB) is installed in the camera body, and when this signal (PR, ) is applied to the reset terminal (RE), μ- com(1) is reset. The oscillation circuit C06C) is a circuit that outputs a reference clock pulse (CP), and this clock pulse is input to the clock input terminal (CL) of ILcomC,1) and each other block, and the clock pulse (CP) is used to output the reference clock pulse (CP). The circuit operations of the entire camera system shown in FIG. 2 are synchronized.

The display unit (DP, ) is composed of a liquid crystal that is driven in a time-division manner, and the segment terminal (DP, ) of μ-cam ('1) is
Based on the signals from SF, G) and common terminal A (IOM), the exposure control value is displayed, the exposure control mode is displayed, etc. The above μ-com (1), oscillator (OSC), display unit DP1) and an interface circuit (I
F), strobe control device (FC), data selector (M
P,), inverters (IN,) to (IN,), and the AND circuit (AN,) are supplied with power from a power line (+E) directly connected to the power battery (BB).

The switch (MS) is a photometry switch that is closed in conjunction with photometry operation, and when this switch (MS) is closed, μc
Inverter (IN, ) is connected to the input terminal (ST) of om(1).
A “High” signal is input through μ-com (
1) starts reading data for exposure control, and at the same time, the A-D conversion operation of the photometric output, the exposure method, and the display operation start. Furthermore, when the photometric switch (MS) is closed, the power supply transistor (BT) becomes conductive. Circuits other than those mentioned above in the camera body are connected to the power supply line (+\”) 3) via the power supply transistor (BT).
mosquito? , power is supplied. In addition, the power line (+
The power-on reset circuit (
A reset signal (PRl) is output from the camera PO,), and this signal is input to an exposure time control device (CT) and an aperture control device (CA), which will be described later, and these devices are re-centered.

A block (3) surrounded by a broken line is an exposure control section, which is composed of an exposure time control device (CT), an aperture control device (CA), and a pulse generator (PG). The exposure time control device (CT) receives data Tv of the speech or set exposure time from the output terminal (OPl) of μ-com (1). The exposure time control device (CT) generates a signal representing the time corresponding to this data Tν (i.e., the time from shutter opening to shutter closing) as a cling pulse (cp).
+, two units are generated.

This signal controls the exposure time. Aperture control device (
CA) from the output terminal (OP) of u-com (1),
Data ΔAv representing the calculated or set number of refinement stages
Then, a pulse from a pulse generator (PG) is input. A pulse generator (PG) outputs a number of pulses corresponding to the amount of rotation of an aperture ring (not shown) provided on the camera body side.

1) Aperture l) The control device (CA) counts the number of pulses corresponding to the number of aperture stages of the lens (LE) as the aperture ring rotates, which is generated by the pulse energizer (L'<y). , this count value and u-comm(1
) from the output terminal (OP, ) of the narrowed-down J-order data ΔA~・, and determine whether it is both or not. ::When the aperture ring rotates, the aperture aperture is controlled in this way.

The switch (LS) detects whether the interchangeable lens (LE) is attached or not, and is closed when the interchangeable lens (]-E) or the camera body is attached to the ring.
It will be released in an American-made state. This attachment detection switch (LS
) is closed, a "High" signal is input to the input terminal (i1) of μ-com (1) via the inverter (IN, ), and μ-com11 (1) is connected to the attached lens (LE). If the input terminal (i1) is set to "Low" due to the opening of the attachment detection switch (LS), the lens data will not be read and the exposure time will be calculated using Ike's method, which will be described later. Do the following.

In the figure, the flock (5) surrounded by a broken line is a data output section that outputs data for exposure control, including a light receiving element (PD) for open average photometry, and a variable voltage source (5) for outputting a film sensitivity signal.
VE1), a photometric circuit (MP) consisting of a logarithmic compression diode (Dl) and an operational amplifier (OA), an A-D conversion circuit (AI)), a set aperture value signal output device (AS), and a set exposure time. A signal output device (TS), a film sensitivity signal output circuit (SS), a mode signal output device (MSO)
).

The photo-receiving element (PDl) LL shown in FIGS. 3 and 4: 1 is installed as shown in FIG. Indicates the state during exposure to light.

In FIG. 3, the photographic aperture device (APL) is set to the open aperture, and the reflecting mirror (RM) is lowered to guide the source from the subject to the finder optical system. Reflective mirror (
For example, the subject light that passes through a half mirror section installed in the center of the RM) is reflected by a reflector plate (RL), and then passes through a condensing lens (LE13) to a light receiving element (PD).
incident on . At this time, the operational amplifier (OA1) in Figure 2
The photometric output of is Bv+Sv-Avo. Here, Bv corresponds to the focal length of the subject, AVO corresponds to the open aperture, and Sv corresponds to the fill 13 sensitivity. is the apex value.

In FIG. 4, the photographing aperture (APL) is controlled based on a signal representing the set or calculated aperture value Av, and the reflecting mirror (RM) and reflector plate (RL) are retracted outside the photographing optical path. ing. And shutter (SHT)
is in an open state, and therefore, the light that passes through the lens (LE) and photographic aperture (APL) and is reflected on the film surface (FIL) is transmitted to the light receiving element (PD,
). At this time, the output of the operational amplifier (OAl) is Bv+S~.-Av. Based on the output of the operational amplifier (OAl), the amount of light emitted by the strobe device (FL) is controlled as described later.

When a "High" pulse is output from the output terminal 0 of μ-com (1), the A-D converter (AD) converts the analog signal from the operational amplifier (OAl) based on the clock pulse (CP). The photometric signal Bv+Sv-Avo is converted into a digital signal. This AD converted data Bv+S
v-Avo is the input terminal (I
P).

The setting aperture i) value signal output device (AS) is the lens (J).

Data Avs-Avo corresponding to the setting position of the aperture setting ring (not shown) in E) is output to the input terminal (IP3) of the data selector (MPl).

The set exposure time 1L'-small output device TS> outputs digital data of the exposure time tJ-monthly set by the exposure time setting member (not shown) of the camera body. The output terminal of this output device (TS) is connected to the input terminal (IP, ) of the data selector (to 1P1). The film 1 and the sensitivity signal output device (SS) output digital data corresponding to the film sensitivity manually set by a film sensitivity setting percentage material (not shown) of the camera main unit. An output terminal of this output device (SS) is connected to one input terminal (IP, ) of a data selector (bqp, ). A mode signal output device (MSO) corresponds to an exposure control mode manually set on a mode setting member (not shown) of the camera and outputs digital data. The output terminal of this output device (MSO) is connected to the input terminal (IP, , ) of the data selector MP1).

The interface circuit (1 code) is /lcom (1)
When the output terminal (06) of the interface becomes 14igh", various data from the interchangeable lens (1=E) is sequentially read. When the reading of various data from the interchangeable lens (Ll-1) is completed, this interface Circuit (■F)
The data selector (MP1) and the μ-com (
1) via the external data bus (DB), the μ-com
Enter in (1). Note that this interface circuit (
An example of a stationary circuit of the IF) is shown in FIG. 13, and its detailed operation will be described later.The strobe control circuit (FC) is as follows:
Control terminals (O5), (Os), (O
10), (0,0), and (011) and a signal input from the inverter (INl), data is exchanged with the strobe device (FL). The detailed configuration and operation of this control circuit (FC) will be described later with reference to FIGS. 11 and 12.

The data selector (MPl) is based on the 4-pin data given from the output terminal (OP, ) of μ-com (1) to the selection terminal (SL), from the input terminal (IP, ) to (I
The L data input to the data bus (r)B>
input to μ-com (1) via . The data given to the selection terminal (SL) of this data selector (MP, ) and the data bus (DB
) is shown in Table 1.

As shown in Table 1 above, if the data at the output terminal (OP3) is “OH”, the set exposure time data Tvs from the input terminal (IP, ) is “IH”, then the film sensitivity from (1P5) is If data Sν is ′”2H” (■[ゝ6
), if the exposure control mode data from (IP
If the photometric value data from 2) is “4H” (IP7)
If the data of the straw kite from ``'S'' (IP3), the data of the setting narrowing stage number AvsAN・0 are respectively,
It is stored in μ-com (1) via the data bus (DB). Also, if the data of the output terminal (OP,) is “6H”
When it is "to" DH, the interface circuit (I
The data from F) is input to the input terminal (IP, ) of the data selector (MP1). Note that the interface circuit (IF) is connected to the “6” input from the output terminal (OP3).
The lens side circuit (LE
The data read from C) and shown in Table 2 below are output to the terminals (IP, ), respectively. Also, μ-com (
In 1), when the lens-attached switch (+, S) is closed and the input terminal P (i1) is "Low" without "C", only data from "oH" to "4H□" is output from the output terminal (OP3). First, the data related to the lens (LE) is μ-
com(1) is not loaded.

The switch (RS) is closed when a release button (not shown) is pressed, and opened when the release button is released. The switch (CS) is closed when winding is completed, but is opened when the exposure control operation is completed to prevent accidental exposure.

The signal from the release switch (RS) is transferred to the inverter (I
N4) is input to one input terminal of the AND circuit (AN, ). Accidental Exposure Prevention ■The signal from the two large inch (CS) is connected to the AND circuit (AN) via the inverter (IN,).
, ) is input to the northern input terminal, and μ-co
It is input to the input terminal of m(1). Further, the output terminal of the AND circuit (AN, ) is connected to the interrupt terminal (1t) of μ-com (1). The output terminal (0,) of μ-com (i) goes high when the exposure control operation starts.
h”, and this “High” signal causes the terminals (0,
) is connected to the release circuit (RL) that performs a release operation for exposure control operation. Also, μ-com (1)
The output terminal (O) of the inverter (IN, ) is connected to the input terminal of the inverter (IN, ), and the output of this inverter (IN3) is connected to the base of the power supply transistor (BT, ) via a resistor. With this configuration, even if the photometric switch (MS) is opened during the exposure control operation, this transistor (BT,) is maintained in a conductive state. The output terminal (○) of u-com (1) becomes “High” while the interface circuit (IF) is reading data from the lens (LE) side.
6) is connected to the input terminal of the inverter (IN6),
The output terminal of this inverter (IN6) is connected to the base of the power supply transistor (BT) via a resistor. With this configuration, when the terminal (0,) becomes "High", the output of the inverter (IN,) becomes "Low",
The transistor (BT, ) is conductive and the power supply line (+VB
) to the power line (+VL), the terminal on the camera body side (J
B+) + Lens (L) via the lens side terminal (JL1)
Power is supplied to the circuit (LEC) on the E) side. lens(
The circuit (LEC) on the LE side has a built-in ROM (RO) (described later) in which various lens data can be individually stored. Interface circuit on the camera body side (■F)
The clock pulse (CPL) output from the camera is input to the lens side circuit (LEC) via the camera body side terminal (JB) and the lens side terminal (JL2), and this clock pulse (CPL) is synchronized. As a signal, R is transmitted between the interface circuit (IF) and the lens side circuit (LEC).
The address signal and data signal of OM (RO1) are exchanged alternately via the signal line (SB), the terminal on the camera body side (jB,), and the terminal on the lens side (JL,).

FIG. 5 is a flowchart showing the operation of μ-com (1) in FIG. The operation of the camera system according to the embodiment shown in FIG. 2 will be explained below based on the flowchart shown in FIG.

μ-com (1) normally does not receive a clock (CP) from the outside, is inactive, and consumes low power. When the photometry switch (MS) is closed and the signal from the 11th sieve is input to the start terminal (ST),
μ-com1tA1) starts operation from a specific address. In addition, when the output of the inverter (IN,) reaches ■1igb'', the strobe control circuit (t'C) connects the strobe device (
A command signal is sent to start the operation of the booster circuit (1"L), and the booster circuit starts operating. In step #1, the photometry switch (MS) is closed and the start terminal (ST) is closed. I don't know if it went to "High" or not.
'll be separated. Either the photometry switch (1t4S) is open, or the start terminal (ST) or "Lo+u"
If so, move to step 2 and also starch #215
The operation of step #6 is performed to -3°.This operation L2 will be described in detail later.

- If it is determined that the start terminal (ST) is "Hi8h", the process moves to step #7 and the timer lens (TR) is turned on. Second tie? −
The Renoster (1'R) will be described in detail later.

Next, in step #8, press the lens attachment switch (LS).
is closed and the input terminal (11) is "High". Input terminal (11) is “Lo”
If the output terminal (O6) of u-com (1) is “High”, the process immediately moves to step #10, and if the input terminal (11) is “High”, the process moves to step #9.
h and conducts the transistor (BT2) via the inverter (IN6) to connect the circuit (L) on the lens (LE) side.
At the same time, power is started to be supplied to the lens (EC), and the interfugois circuit (IF) starts reading data from the lens (LE), and the process moves to step #10. In step #10, the output terminal (0,) of μ-com (1) is connected to “
"High" to cause the strobe control circuit (FC) to start reading data from the strobe device (FL),
In step #11, “High
In this way, an operation command pulse is given to the A-D converter (AD), and A-D conversion of the photometric output output from the operational amplifier (○Al) is started. Next, in step #12, μ-com
4-bit data "OH" is set in the data register (DR) in (1), and this data is output to the output terminal (OF2). At this time, as shown in Table 1 above, the exposure open data TνS input to the input terminal (14) is output from the data selector (Mp,), and this data is transmitted via the data bus (DB) to μ- com(1) is read into a predetermined register. Then, in step #15, "1" is added to the contents of the data selector (DR). Then, in step #16, it is determined whether the contents of the data register (DR) have become "5H". If the content of the data register (DR) is not 5, the process returns to step #1j3 and the same operation is repeated.

In this way, the contents of the data register (Dl member 51
→' data from the data selector (MP1) is read into μ-comin (1). If the content of the data register (I)R) is ``1'', the film sensitivity gator Sv is read, and the data for the exposure control mode is read from ``22''. A-D conversion is started by the pulse output from ), and the contents of the data register (DR) are “
3H", the A-D conversion is completed, and it is assumed that data Bv+Sv-Avo representing the brightness of the subject is input to the input terminal (IP2) of the data selector (MPI). Then, this data Bv+Sv -Avo is input into a predetermined register.

Thereafter, in the same manner as described above, the data selector (DR
) becomes “4H”, the data selector (
The data input to the input terminal (IP7) of MP,) is
It is input to μ-com (1). And step #1
6, the contents of the data register (DR) are "5H" at this time, so the process moves to step #17, the terminal (O8) is set to "Low", and the strobe control circuit (FC) is turned off. It becomes inactive and moves to step #18.

In step #18, the state of the input terminal (i1) is determined. When the mounting switch (LS) is not closed and the output of the inverter (IN, ) is "Low", as will be described in detail later, in the steps after step #29, the interchangeable lens (LE) is In step #18, if it is determined that the interchangeable lens (LE) is attached to the camera and therefore the input terminal (11) is "High", #19 Move on to the following steps.

In step #19, data "5H" is sent from the data register (DR) to the output terminal (OP, ), and based on this data "5H", the setting narrowing is input to the input terminal (IP3) of the data selector (MP1). Data AvsAvo representing the number of stages is sent to the data bus (DB). Then, in step #20, the data Avs-Avo is read out and stored in a predetermined register. After that, the contents of the data register (DR) are
1 is added and the process moves to step #22.

In step #22, the interface circuit (1
Wait for the signal applied from F) to the input terminal (L, ) of μ-com (1) to become “High”. That is, from the lens side circuit (LEC) to the interface circuit (IF)
When all data transfer is completed, the interface circuit (IF) sends the 1i'' signal to the input terminal (13) of μ-com (1).

As described above, when the input terminal (i3) of μ-com (1) becomes “High”, the process moves to step #23.

In this step #23, the output terminal (O6) is set to “L”.
ow” and this “Low” signal is sent to the inverter (I
) is inverted and becomes “High”, and this “H”
The “high” signal is applied to the base of the power supply transistor (BT, ), and the transistor (BT, ) becomes non-conductive.Therefore, the power supply from the power supply line (+VL) to the lens side circuit (LEC) is stopped. Then, in the steps after step #24, the interface circuit (I
Start reading data from P) to μ-com (1).

In step #22, when the input terminal (i3) of μ-com (1) becomes “High”, in step #24, the data taken into the interface circuit (IP) is sequentially transferred into μ-com (1). It is captured. In this case, from the output terminal (OP3) of u-com (1),
Signals “6H” to “DH” indicating which data is to be taken into the data bus (DB) of the μ-com (1) are sent to the data selector (MP, ) and the interface circuit (I
F) is given. If the signal output from the output terminal (OP3) is "6H", it is the check data, if it is "7H", it is the open aperture value data Avo, and if it is "8H", it is the maximum aperture value data A.
vm "9H" is the shortest focal length data fw, "AH" is the longest focal length data ft, "BH" is the Dv described later
o data, if “CH”, set shooting immediate separation data Dν, D
H”, the set focal length data fs is sent from the interface circuit (IF) to the data selector (MP,
) is input to the input terminal (1P1). Further, these data are sequentially output from the data selector (MP, ) to the data bus (I)B). In this way, μ
-comf1) repeats the operation of 1) fetching the various data described above from the data selector (hip, ) via the data address (DB). And μ-comin<1
), when the interface circuit (1F) completes the import of all the data described above, the content of the data register (DR) is determined to be "EH" in step #27, and then the next step # Move to step 28.

In step #28, the μ-com (
1) Among the data imported into 1), interchangeable lenses (LE)
is attached to the camera, it is determined whether the required check data has been input. This check data is used for the lens side circuit (LEC).
) is the first data sent to μ-com (1), and is the same data for any lens. When it is determined whether this check data has been input, μ-c
om(1) moves to step #35 and below - If this check data is not inputted, it moves to step #2. This check data is not entered when the interchangeable lens (LE) is not attached to the camera, or when a camera accessory such as an intermediate ring or bellows is attached between the lens and the camera body. sometimes corresponds to

Next, the operations in the steps after step #29 in a state where the interchangeable lens (LE) is not attached to the camera body or the check data is not input will be described.

In step #29, it is determined whether or not a flash photography mode signal is input to the camera body, for example, a strobe device (
PL) is not attached to the camera. This includes a strobe device (PL) as described below.
or when it is not attached to the camera, all data input to the terminal (JB) on the camera body is “Low”.
”.In this way, connect the above terminal (JB
, ), a strobe device (FL) is attached to the camera. That is, it is determined that a flash photography mode signal is being input to the camera body. When it is determined that the flash device (FL) is not attached, the process moves to step #31, and calculations for photographing using constant light are performed.

It is now assumed that an exposure control mode setting device (not shown) has set one of the automatic exposure control modes among program mode, aperture-priority exposure time automatic control mode, and exposure time-priority automatic aperture control mode. In other words, it is assumed that the photographer desires automatic exposure. At this time, the output of the photometric circuit (ME) is Bv-Avn. Here, Avn is the effective aperture value.

Next, the exposure time Tvc is calculated using the following formula.

(BvAvn)5v=Tvc Based on the exposure time Tvc calculated according to the above formula, the shutter speed of the shutter (SHT) is controlled. In this case, the number of aperture steps ΔAv is 0, the photographic aperture device (APL) does not aperture the image, and the exposure time is automatically controlled using the TTL aperture metering method.

Note that in the manual setting mode, the exposure time is controlled by a manually set value, the number of stops is set to 0, and the photographic aperture device (APL) does not stop down.

On the other hand, if it is determined in step #29 that a strobe is attached, the process moves to the slump step 30 and calculations for performing strobe photography are performed. In this case, the number of refinement stages ΔAvf is set to 0. The exposure time Tvf is the exposure time corresponding to the tuning limit (for example, 1/250 se
c).

Note that when the manual exposure control mode is installed and the set exposure time Tvs is shorter than the time corresponding to the tuning limit, the exposure time corresponding to the tuning limit is determined as the control exposure time Tvf. In addition, the set exposure time Tvf
When the set exposure time Tvs is longer than the time corresponding to the tuning limit, the set exposure time Tvs is determined as the exposure time Tvf for flash photography.

Next, the exposure calculation for steady-state photography in step #31 described above is performed, and the process moves to step #32.

In step #32, based on the data input from the strobe device (FL), a signal to be described later indicating that the charging voltage of the main capacitor (not shown) in the strobe device (FL) has reached a predetermined value is input. It is determined whether the

When it is determined that a signal indicating that the receiving voltage of the main capacitor has reached a predetermined value is input, #3
The process moves to step 3, where it is displayed that strobe photography will be performed with the camera.

On the other hand, if the charging pressure of the main capacitor has not reached the predetermined value, the process moves to step #34, and a message indicating that steady light photography is to be performed in the camera is displayed.

If it is determined in step #28 that the check data has been input, the process moves to step #35. Then, in step #35, it is determined whether a strobe device (FL) is attached. When it is determined that a strobe device (FL) is attached, as will be described later, calculations for performing strobe photography are performed in step #36, and the process moves to step #37. On the other hand, if it is determined that the flash device (FL) is not attached, the process moves to step #37, and calculations for performing steady light photography as described below are performed.

Next, the following calculations are performed depending on what kind of exposure control mode is set in the exposure control mode setting device (not shown) of the camera.

First, in the program mode (hereinafter referred to as P mode), the following calculation is performed. Avo<Avc element, Avm(Avo:
When the open aperture value is Avm (maximum aperture value), this calculated aperture value is set as the aperture control value Avc for constant light photography, and then v = 1'\ - (3) The exposure time is calculated as the exposure time control value Tv for constant light photography.
Let it be c. Also, when Av<Avo, Avo is combined with the control value Avc to calculate Toniji-4\~・o=1'\□-(4), and when this calculated exposure time is Tv<Tvmin, , Tv
An under warning is given by setting min (Tvmin; longest exposure time) as the control value Tvc. When Tv≧Tvmin, Tv calculated by equation (4) is set as the control value Tve. Furthermore, when the aperture value Av calculated by equation (2) is Av>Avm, Avm is set as the control value Avc, and t', v--Av
1n=Tv----(5) is calculated, Tv>Tv
max (Tvmax; shortest exposure time), an over warning is given and Tvmax is set as the control value Tve. On the other hand, when Tv<Tvmax, Tv calculated by equation (5) is set as the control value Tvr.

When in aperture priority exposure time automatic control mode (hereinafter referred to as A mode), find the set aperture value Avs by
=Tv---(7) The exposure time is calculated by performing the calculation.

In order to satisfy Tvmin<Tv<Tvmax, the set aperture value Avs and the exposure time Tv calculated by equation (7) are set as control values Avc and Tvc. On the other hand, Tv<Tvmin
In this case, Tvmin is set as the control value Tvc, and the calculation of Ev-Tvmin=Av----(8) is performed, and when Av>Avmin, the aperture value calculated by equation (8) is set as the control value Avc. Further, when Av<Avmin, an under warning is issued by setting Avmin to the control value Avc.

Furthermore, the exposure time Tv calculated by equation (7) is Tv>Tv
max, then Tvmax is set as the control value Tvc and Ev-TVl+laX=i~1. ----Perform the calculation of C9). When Av>Avm, Avm is set as the control value Avc and an over warning is issued, while Av≦Av
When m, the aperture value Av calculated by equation (9) is set as the control aperture value Avc.

When in exposure time priority automatic aperture control mode (hereinafter referred to as S mode), calculate L'v-1" vs. (10) to find Avo≦Av≦Avm. In this case, set exposure time Tvs and aperture value Av found by equation (10) are set as control values Avc and Tvc, and when Av<Av, Avo is set as control value Ave, Ev-Avo-=Tv-- -- Perform the calculation of (11). Then, when Tv>Tmin, T calculated by equation (11) is set as the control value Tve, and when Tv<Tvmin, T
When vmin is set as the control value, an under warning is issued.

On the other hand, when Av calculated by equation (10) is Av>Avm, Ev-Avm (=
Ave)=Tv----(12) is calculated, and when Tv≧Tvmax, Tvmax is set to the control value Tvc.
An over warning will be issued.

Furthermore, when Tv<Tvmax, Tv found by equation (12) is set as the control value Tve.

When in manual setting mode (hereinafter referred to as M mode), set Avs and Tvs are set as control values Ave and Tve,
Next, calculate Ev-(Ave+Tve)=ΔEv---(13).

At step #37, when the calculations for any of the above setting modes are completed, the following calculations are performed: 2\vc, Avo=ΔAvc---(14), and the process moves to step #38.

In this way, when it is determined in step #35 that a strobe is attached, calculations for strobe photography are performed in step #36, and then the above-mentioned calculations for steady light photography are performed in step #37. Perform step by step and move on to step #38.

Next, the calculation contents of step #36 are shown in Figures 6 and 7.
A description will be given based on the graph in FIG. 8 and the flowcharts in FIGS. 9 and 10. Figure 6 shows the aperture value for exposure control in step 3 when the flash unit (FL) is set to flash output control mode (hereinafter referred to as TTL mode) using TTL metering on the camera side, and P mode is set on the camera body side. This shows the relationship between exposure times.

Referring to this graph, the operation in the TTL mode and the P mode will be explained based on the flowchart of FIG.

Step #101 is (BV−−j\vo)+Sv+Avo=Ev−−−−(
15) is performed, and then, in step #102, it is determined based on the data from the strobe device (FL) whether the mode set on the strobe side is TTL mode or external light mode. Then, if the TTL mode is selected, the process proceeds to step #103, and if the external light mode is selected, the process proceeds to step #201 in FIG. 10. Next, in step #103, the camera side or P mode determines the edge, and if it is P mode, #10
If the mode is not P mode, the process moves to step #150.

In step #104, it is determined whether the focal length of the interchangeable lens (LE) attached to the camera body is 30 m or more, and if it is less than 30 mm, the aperture value Avfs corresponding to film sensitivity Sv = 5 is set to 6 ( F8) (Fig. 6 W1
). Then, in #106, the synchronization exposure time Tv
5 (1/30 sec) (W1 in FIG. 6) is set as f. If the focal length is longer than 30 mm, it is determined in step #107 whether it is within the range of 31 mm to 55 mm. When the focal length is within this range, set Avfs to 5 (F5, 6) (Fig. 6 W,) and Tvf to 6 (1/60 sec) (Fig. 6 W2). If it is not within the 55mm range, then
In step #110, it is determined whether the focal length is in the range of 56mm to 120mm, and if it is within this range, A
vfs: 4 (F4), Tvf=7 (1/125sec)
(T in Fig. 6), and if the focal length is 121 mm or more, proceed to step #113 and Avf5 = 3 (F2
, 8), Tvf=8 (1/250 sec) (Fig. 6 T2
) and proceed to step #115.

In the step #115, the calculation Sv-△5v---(16) is performed, and in the step #116, A, F, ten △
Perform 11 calculations of Sv=Av[-Dego (17). In this way, if the film sensitivity changes to, for example, a high sensitivity side by determining Aν[, the amount of light incident on the film due to the appropriate strobe light 1j can be reduced, so that the strobe is kept within a constant strobe interlocking range as much as possible. You can narrow down the aperture with . Therefore, the depth of focus can be made as deep as possible when the strobe S is in the shadow. In addition, if the film sensitivity deviates from Sv=5, the value of the deviation △S
When the aperture is narrowed down by v, the strobe interlock range changes.

In step #l17, in step #116 (17
) Determine whether Avf obtained based on the formula is Avf<Avo, and if Avf<Avo, select #1.
In step 18, set Avo to the aperture value Av for flash photography.
Let it be l. If it is determined in step #117 that Avo≦Avf, then in step #119 Avm<
It is Avf, but let's determine what it is.

And if Avm<Avf then Avm is Avf and waist A
If vm≧Avf, use the Avf calculated in step #116 as it is as the aperture value for flash photography #121
, to move to the step of .

In step #121, it is determined whether Avf+'f'vf≧Ev+1-----(18), and if the formula (IS) is satisfied, proceed to step 131. If not, #
The process moves to step 122.

The value of Fv corresponding to this switching point is Ev=10 in the example of FIG. Then, as shown in FIG. 6, Ev
If <10, the process moves to step #131 with Avf and Tvf remaining at the values determined as described above. On the other hand, for Ev≧10, as shown in FIG. 6, Avf and Tvf corresponding to Ev were calculated by the method described later. rear,#
The process moves to step 131.

In step #122, Ev+1. Avf=Tva---(1, 9) is calculated, and it is determined whether Tva>8 in step #123. Then, when Tva≦8, in step #130, Tva obtained by equation (19) is used as the control exposure time Tv.
As f, the process moves to step #131. This is the 6th
In the example in the figure, if wl, the range 1w is 10≦Ev≦13.
, then 10≦Ev<12 range, if Tl, 10≦E
This corresponds to the range of v≦11. On the other hand, when Tva>8, Tv is set to 8 (1/250 sec) in step #124.
As f, Ev+LTvf””Ava---(20)
Perform the calculation. And if Ava≦Avm (2
0) The Ava calculated by formula is the aperture value Av for flash photography.
As f, the process moves to step #131. On the other hand, Ava
>Avm, the display device (OE) shown in Figure 2 gives an over warning and sets Avm to the control aperture value Avf in #13.
Move to step 1. The part corresponding to steps #124 to #129 is Wl in FIG.
≧13. If W2, Ev≧12° If T1, Ev≧11. T
, corresponds to a region where Ev≧10.

In the above explanation, Ava, based on the value of Ev+1,
Tva is calculated by using the value of IEv as explained in FIG. 1.

In this example, 2 is IEv, or 0Ev-2F]
It is best to set it to an appropriate value within the range of V.

Next, the exposure calculation operation in S mode will be explained with reference to FIG. In Fig. 7, the solid line is Tvs = 3 (1/8se
c), the dashed line is TVS=6 (1/60se
c), the dashed line is Tvs=8(1/25
This corresponds to the case where 0sec) is set. In FIG. 9, if it is determined in step #103 that the mode is not P mode, then in step #150 it is determined whether the mode is S mode. Then, in the S mode, in step #151, it is determined whether Tvs≦8. And Tvs≦
8 and outside, Tvs is defined as control exposure time Tvf #15
Move on to step 4. On the other hand, when Tvs>8, #
In step 153, Tvf is set to 8, and the process moves to step #154. In step #154, the following calculation is performed: [Volume 1-Tvf=Ava----(21), and the control aperture value Ava is calculated. And #155
If Ava<Al1 in step 1 of #
To step 15G, if Ava≧Avor, #]5
Go to step 8 and do 1. #15F) step (
21) Ava calculated based on the formula is Ava<Avo
If so, go to step #156.

After setting Avo as the control aperture value Avf and issuing an under warning on the display device (UE) shown in Fig. 2, #1
Move to step 31. In the embodiment shown in FIG. 7, the solid lines correspond to Ev and 3. The broken line corresponds to an area where Ev<6, and the dashed line corresponds to an area where Ev<8.

If it is determined in step #155 that Ava≧Avo, the process moves to step #158. And #158
In step , it is determined whether Ava>Avm. When it is determined whether Ava≦Avm, in step #165, the aperture value Ava calculated by equation (21) is referred to as the control aperture value Avf, and in the case shown by the solid line in FIG. 7, 3≦ Ev≦11, 6 if indicated by a broken line
≦Ev≦14, 8≦Ev≦16 when indicated by a dashed line
It is carried out in the area of

On the other hand, if it is determined in step #158 that Ava>Aνm, then in step #159,
vm is determined as the control aperture value Avf, and in step #160, the following calculation is performed: Ev+1-Avf=Tva---(22). Thereafter, in step #161, it is determined whether Tva>8. If Tva≦8, the process moves to step #162, and in this step #162, Tva calculated by equation (22) is set to control exposure time T.
vf, and then proceeds to step #131. This means that in the case shown by the solid line in Figure 7, 1
1≦Ev≦16, 14≦Ev≦ when indicated by a broken line
This corresponds to 16 areas. Note that in the case indicated by a dashed-dotted line, the corresponding area does not exist.

On the other hand, if Tva>8, the process moves to step #163, and in the second step #163, the control exposure time T
vf is set to 8 (=1/250 sec), and an over warning is performed using the second display device (OE) shown in 1. Thereafter, the process moves to step #131. This corresponds to the region where Ev>16 in the case shown in FIG.

Next, the calculation operation in the A mode will be explained with reference to the graph of FIG. 8 and the flowchart of FIG. 10.

As mentioned above, if it is determined in step #150 that the mode is not S mode, the process moves to step #170,
In this step, it is determined whether the mode is A or not.

If it is determined that the mode is A mode, the process moves to step #171, and in step #171, it is determined whether the focal length of the lens is 30 mm or less. If it is 30 mm or less, the process moves to step #172, and the exposure time Tvf representing the control target value is determined to be 5 (1/30 sec).

On the other hand, if the focal length of the lens is longer than 30 mm, the process moves to step #173, and it is determined whether the focal length of the lens is within the range of 31 mm to 55 mm. If the size is within this range, the outside is #174
Go to step , and set the exposure time Tvf to 6 (1/60s).
ec).

If the focal length of the lens is not within the range of 31 mm to 55 mm, proceed to step #175,
In step #175, it is determined whether the focal length of the lens is within the range of 56 mm to 120 m. When the size is within this range, the process moves to step #176 and the exposure time Tvf is set to 7 (1
/125spc).

On the other hand, if it is determined that the focal length of the lens is not within the range of 56 m to 120 mm, step #17
7 and exposure time Tvf to 8 (1/250sec)
It is determined that

After performing the above-described operations, in step #178, it is determined whether Avs+Tvf>Ev+1 (23) is satisfied. When formula (23) is satisfied, the aperture value Avs set in step #179 is determined as the control target aperture value Avf, and the process proceeds to step #131. In the example shown in FIG. 8, this operation is performed in the case of Wl, Ev<9, in the case of W2, Ev≦10, in the case of T1, Ev<11, and in the case of T1, Ev There are <12 areas.

On the other hand, if it is determined in step #178 that equation (23) is not satisfied, the process moves to step #180,
In this step #180, Ev+1-Avs=T
va...The calculation of (24) is performed. Thereafter, in step #181, it is determined whether Tva>8.

If it is determined in step #131 that Tva<8, the process moves to step #188, where the exposure time Tva calculated according to equation (24) is set as the control target value, and then the process proceeds to step #131. Transition. The region where the above operation is performed is 9<Ev in Wl of FIG.
<12, W, 10<Ev12, and T1, 11<Ev<12. Note that at T2, there is no region in which the above-described operation is performed.

In step #181, if it is determined that Tva>8, the process moves to step #182, and this step #182
, the exposure time is defined as TvfbW.

After that, the process moves to step #183, and this step #1
At 83, the following calculation is performed: 1->v+1-Tvf=Ava.--(2B). Then, in step #184, the above calculation is performed. It is determined whether Ava is greater than Ava or not. When Ava≦Avm, in step #187, the value Ava calculated by equation (25) is determined as the control target aperture value Avf, and the process moves to step #131. The above operation is performed in the region 12<Ev<16 in FIG. 8.

On the other hand, when Ava>Avm, in step #185 Avm is determined as the control aperture value Avf, and then in step #186 the display device (O
Execute over-preparation by E) and proceed to the next step #1.
31.

If it is determined that the mode is not the A mode in step #170 described above, the process moves to the steps after step 190 corresponding to the M mode.

In step #190, it is determined whether Tvs<8. If ≠svs>8, Tv・' is set as 8, and Tv
When s<8, Tvs is defined as Tvf, and the following #19
In step 3, Avs is determined as Avf, and then the process moves to step #131 in FIG.

If it is determined in step #102 in Figure 9 that the mode is not TTL strobe mode, the external light mode is set to the strobe device (F
L), and #20 in Figure 10
Move to step 1 and subsequent steps.

In step #201, it is determined whether the exposure control mode on the camera side is M mode. When the mode is M, the process moves to step #202 and the membrane pressure exposure time Tvs
>8. When Tvs>8, the control exposure time Tvf representing the control target value is set to 3, and T
When vs≦8, the control exposure time Tvf is equal to the above Tv.
Define it as s.

Next, in step #205, the control aperture value A
vl is determined to be the set aperture value Avs, and the process moves to step #131 described above.

On the other hand, if it is determined in step #201 that the mode is not M mode, regardless of whether the exposure control mode of the camera device is P, A, or S, step
206, the focal length of the lens (LE) is 30mm.
It is determined whether or not: When the focal length of the interchangeable lens (LE) attached to the camera device is 30 mm or less, the control exposure time Tvf is set to 5, and the process moves to step #213. In step #206, when it is determined that the focal length of the lens (LE) is longer than 30 mm, the focal length of the lens (LE) is determined to be within the range of 31 mm to 55 mm. is determined. When the focal length of the lens (LE) is within the range of 31 mm to 55 mm, the control exposure time Tvf is set to 6, and the process moves to step #213.

On the other hand, in step #208 described above, the lens (
If it is determined that the focal length of the lens (LE) is not within the range of 31 mm to 55 mm, the process moves to step #210, where it is determined whether the focal length is within the range of 56 mm to 120 m. It will be done. When the focal length is 56 mm to 120 mm and has a size of 1·n concave circle, the control exposure time Tvf is determined to be 7, and the process moves to step #213. Similarly, #21
If it is determined in step #0 that the focal length of the lens (LE) is not within the range of 56 mm to 120 mm, the control exposure time Tvf is determined to be 8 in step #212, and #213 Move to the next step.

In step #213, the strobe device (FL)
Obtain Avf data based on the data input from
In step #214, it is determined whether Avr<Avo. When Avf<Avo, the control aperture value Avf is determined to be Avo, and the process moves to step #218.

On the other hand, in step #214 described above, Avf≧Av
If it is determined that it is o, it is determined in the next step #216 whether or not Avf>Avm.

When Avf>Avm, the control aperture value Avf is Av
m is determined and the process moves to step #218. Avf<Av
When m, the process immediately moves to step #218.

In step #218, the following calculation is performed: Ev+1-Avr=Tva...(26). Next, in step #219, Tva>Tvf
It is determined whether Tvf>Tva, the process further moves to step #131.

On the other hand, when Tva>Tvf, the process moves to step #220. I 220-7, Telegu, Tva
It is determined whether ≦8, and when Tνa>8, #2
The process moves to step #22, the control exposure time Tvf is set to 8, and the process moves to step #131.

When it is determined in step #220 that Tva≦8, in step #221, the control exposure time Tvf is determined to be Tva calculated by equation (26), and the process moves to step #131. do.

As described above, when photographing is performed in the external light strobe mode, the aperture value of the photographic aperture device (APL) is controlled by the aperture value set for strobe photographing (FL). Also,
In this case, if the exposure time determined according to the type of subject is between the exposure time determined according to the focal length of the interchangeable lens (LE) and the synchronization limit exposure time, the control exposure time Tvf is The exposure time is determined according to the brightness of the subject.

On the other hand, it is determined according to the subject's degree i. If the exposure time is out of the above range, the control exposure time Tvf is set as the exposure time determined according to the focal length or the exposure time of the tuning limit.

In step #131 of FIG. 9, the maximum light emission amount data lvmax based on the data from the strobe, the film sensitivity Sν, and the distance data from the lens Dv are used to calculate Ivmax+5v-Dv''Av (tone (2' tone)). Performs calculations and determines the aperture value Avd of the interlocking limit during flash photography.
Calculate. Then, in step #132, Avf>A
If it is Av, the control aperture value Avf will be smaller than the interlocking limit aperture value Avd, and the amount of light emitted will be insufficient. Proceed to step #133. On the other hand, #132
When Avf≦Avd in step , the aperture value is on the open side than the control aperture value Avf or the interlocking limit aperture value Avd, so there is no insufficient light output and the interlocking is not performed. The process moves to step #138 without issuing a warning.

When it is determined in step #132 that Avf>Avd, in step 133, the calculation '(AJ+Avd)7'2≠uv---(21S) is performed, and the calculated aperture value Avf and the interlocking limit are calculated. Aperture value A
An aperture value Avf intermediate between the aperture value Avf and the aperture value Avf is calculated, and an out-of-interlock warning is issued on the display device (RA) shown in FIG. Next, in step #135, it is determined whether Av<Avo or not. If Av<Avo, Avo is set as the control aperture value Avf, and if .

In step #1, '38, Tvmax+Sv-Avf=Dvmax...(29-
The calculation 1) is performed. Also, in step #139, Ivmin+Sv-Avf=Dvmin...(29-
The calculation 2) is performed. Both formulas (29-1), (29-
2), the longest interlocking distance Dvmax and the shortest interlocking distance Dvmin that are covered by the control value Avf are calculated. These data Dvmax and Dvmin are sent to the strobe device (FL) via the strobe control device (FC), as described later, and in the strobe device (FL), the light receiving element (PD, ) on the camera body side is sent to the strobe device (FL). This indicates that flash photography will be performed in the so-called TTL mode, which controls the amount of light emitted by the flash device (FL) based on the flash signal.

Here, Ivmin is data indicating the minimum amount of light emission in the strobe device (FL).

In addition, the strobe device (FL) attached to the camera body
Adjust the minimum light emission amount to a constant value in advance, and display the minimum light emission amount. The minimum light emission amount data Ivmin of the strobe device (FL) may be read from the flash unit (FL).

Next, in step 140, the number of aperture stages ΔAvf of the photographic aperture device (APL) is calculated according to the following formula.

Avf-Avo-ΔAv (...<30) Step #1
41, the exposure deviation value △ is expressed by the following formula:
-・ is calculated.

(Ev+1)(Avf+]'vf)=ΔEv...(3
1) The calculated deviation value △Ev is displayed on the display section (DP,
) is displayed. The above deviation value △IEv is 10
Shows how far the camera deviates from the subject force and proper exposure when shooting in a single point.

The step #142 is the step #141.

It is determined whether ΔEv≧0 is calculated. Then, if △)self≧(), that is, in the case of Ev≧10 in Fig. 6, it is the fill-inflash mode, so the terminal (O,,) is set to “High”.
Then, the process moves to step 145. On the other hand, #142
If it is determined that △Ev<(') in step #144, the terminal (011) is set to "Lo" because in this case, the strobe device is used as an industrial light source.
w” and move on to step #145. Connect this terminal (
The operations of the strobe control circuit (FC) when 011) is 'High' and when 'Lou' are described in 1) below.

Next, in step #145, the shooting distance data from the lens Dv or the longest shooting distance data from the lens Dvoo
Determine if it matches.

Here, the longest shooting distance data DvOO is taken from a position at infinity to a position in front of the camera. 〉Distance data D~.'ζThis data is outputted, and since this data differs for each lens, it is sent from each interchangeable lens to the camera body as fixed data. Details regarding this will be described later.

If it is determined in step #145 that Dv≧Dv■, even if flash photography is performed in this case, there is a very high probability that the exposure will be insufficient because the photographing distance is close to infinity.
Since flash photography is basically impossible, a warning is given on the display device (FI) (FIG. 2) in step #i46, and the process moves to step #37. on the other hand,
If it is determined in step 145 that l)v<Dv(a), the process directly proceeds to step #37 in FIG.

This is an explanation of the strobe calculation operation in step 1 to step 3 of #36 in FIG. In addition, over warning.

Under warning, out-of-linkage warning, and infinity warning are connected to the respective terminals (○
l), (○,), (0,), (0,)′”)4i6h
By the way, in Figure 9, Section 1
0 to 1 does not explain the case where there is no need to issue such a warning, but when there is no need to issue a warning, the terminals (0,), (02), (Oi, (0, 1) It is necessary to output the "l-,our" signal.If this is not done, even if the warning is given once and then the situation of the subject changes and the warning is no longer necessary, This is because there is a problem that the warning state is maintained.The second point has been omitted to simplify the chart.

Next, the operation of the flownaya Nl of FIG. 5, and thus the apparatus of FIG. 2, will be explained again.

In step #38, from the strobe device (FL)
- Determine whether a charging completion signal (hereinafter referred to as a charging completion signal) indicating that the charging voltage of the main capacitor (not shown) in the strobe device (FL) has reached a predetermined value is input to com(1). . When the fullness signal is input, in step #39, the camera device is set to the bevel photography mode, and the control exposure time Tvf and control aperture value Abh in the exposure control mode are determined.
', the exposure error ΔI is displayed on the display device (DP, ).

Next, the terminal (O10) is set to "High", and distances Dvmax and Dvmi corresponding to the maximum and minimum interlocking limits calculated in steps #138 and #139 are set.
Sending of data representing n from the strobe controller (FC) to the strobe device (FL) is started, and a "Low" signal is input to the terminal (is).

The above-mentioned data Dvmax, Dvmin strobe device (
When the transmission to FL) is completed, the terminal (is) becomes “L”.
ow” and moves to the next step #42 to connect the terminal (
0°1,) is set to “Low” and the process moves to step #471.

In step #38 above, the filling completion signal is μ-com (
If it is determined that 1) is not input, step #4
3, the camera device performs photography in the constant light mode, and the exposure control mode, control exposure time Tvc, control aperture value Avc, and exposure error ΔEv at the time of photography, and the second It is displayed on the display device (DP, ) in the figure, and the process moves to the next step #44.

In step #44, it is determined that the camera device is capable of performing an exposure control operation, that is, interlaced, and the process returns to step #]. Then, when returning to step #1, the photometric switch (MS) is closed, and therefore the terminal (ST) of μ-com (1) is set to "High".
If the above terminal (ST) is "High", the operation from step #7 onward is performed in the same manner as described above. On the other hand, the process returns to step #1. And outside, the photometry switch (M
If the terminal (ST) of μ-comIn(1) is “Lowυ”, step #2
Then, it is determined whether the terminal (i2) is "Low". The exposure control operation has been completed, but the film winding and shutter charging operations have not yet been completed.
That is, the switch (CS) is opened and the terminal (i2)
If the state is "Low", the process moves to step #4.

In step #4, a plank display signal for display erasing fingering is output, and in step #5, the above-mentioned interwoven is disabled, and μ-com (1) stops operating. In step #2 above, the film winding has completed the ζ pull and shack charge operations, the switch (CS) is closed, and therefore μ-c
Is the terminal (i2) of am(1) “High”?
When separated, the process moves to step #3. Then, in step I3, it is determined whether the contents of the timer register 'rr=j have reached a certain value K or not. When the contents of the timer reno star (TR) have reached a certain value, the process moves to step #4 described above, while the constant value K
When the timer register (TR) is not reached, the timer register (TR)
1 is added to the contents of , and the operations from step #8 onwards are performed in the same manner as described above. To summarize the above operation in μ-com(l), data is read while the photometric switch (MS) is closed.

The operation shown in calculation 9 is repeated. In addition, even if the photometry switch is opened, if the film winding and shutter charging operations are completed, for a certain period of time (the period from when the contents of the timer register (TR) go from 0 to K),
In the same manner as described above, the operations of reading, calculating, and displaying data are repeated, and when the photometry switch (MS) is opened and the above-mentioned predetermined time has elapsed, the above-mentioned operations are stopped. The above-mentioned fixed time is, for example, about 15 seconds.

When the photometry switch (MS) is closed and the first calculation operation is completed, the interrupt terminal (
It becomes possible to accept an interrupt signal to (it). Then, when the film winding and shutter charging operations are completed and the accidental exposure prevention switch (CS) is closed, when the release switch (RS) is closed,
The output of the AND circuit (AN,) becomes "High", and an interrupt signal is input to the interrupt terminal (t). At this time, the calculation of the exposure control data has been completed and it is possible to accept an interrupt signal, so the process moves to the flow for performing the exposure control operation from step #50 onwards.

In this way, as long as the exposure control data is calculated and interrupt operation is possible, even if the step operation with μ-com (1) is being performed, it is possible to receive an interrupt signal. Immediately move to a specific step after #50 and execute the following operations. 6. The release button (not shown) is pressed and the release switch (RS) is closed. As a result, an interrupt signal is input to μ-com (1), and when the process moves to step #50, a blank command signal instructing to erase the display is outputted. Then step #
51, when the lens side circuit (LEC) is only reading data, the terminal (0δ) is set to “Low” so that the data from the lens is not input to μ(om(1)). ” signal is output. On the other hand, when data is being read from the strobe device (FL) to μ-com (1), an interrupt signal or u-com
When the voltage is applied to m(1), the terminal (i4) becomes “High”.
Wait until the voltage changes from 'h' to 'Low'. Then the terminal (
When i4) becomes “Low”, “
It outputs a "Low" signal and moves to step #54.

In step #54, when the above interrupt signal is input to u-com (1) while data is being transferred from the strobe control device (FC) to the strobe device (FL), the terminal (is) is From “High” to “
Wait until the pin becomes "Low".Then, the terminal (is)
When it becomes "Low", the process immediately moves to step #55, sets the terminal (O10) to "Low", and moves to step #56.

In step #56, the terminal (O8) is “High”
From the strobe device (FL) to the strobe control device (
It is determined whether a fullness signal has been input to the FC). Then, when it is determined that the terminal (i6) switches to "Low" and the reading of the charging signal of the main capacitor (C,) in the strobe device (FL) is completed, the process moves to step #58, and the terminal (i6) switches to "Low". O8) is set to "Low", and in the next step #55, the terminal (l,) is set to 'High'.
It is determined whether When the above-mentioned fullness signal is input from the strobe device (FL) to μ-com (1),
The terminal (i2) of u-com (1) is set to "High", and when the fullness signal is not input, the terminal (1)
is set to “Low”.

In the above step #59, the terminal (I7) becomes “Hi”.
gh”, in slap #60, the data representing the number of aperture steps ΔAvf when performing strobe photography calculated in step #30 or #36 is sent to the output port. (OP2) is output to the aperture control device (CA).Then, the next step #61
The exposure time data Tvf is transmitted to the output port (OP,
) to the exposure time controller (CT).

On the other hand, in the above step #59, when the fullness signal is
com(1) and therefore the terminal (
i7) is determined to be “Low”, step #
62 and #63, as described above, the data representing the number of aperture steps ΔAve and the data representing the exposure time data Tve when photographing with constant light, calculated in step #31 or #3i, are ,Respectively,
It is output from the output ports (OP2) and (OP,).

As mentioned above, immediately before starting the shutter (SHT) release, the u-com (1
), and when the fullness signal is input to u-com (1), control data for performing strobe photography is output to each device to be controlled. , when the fullness signal is not input, each control data for photographing with constant light is output to each device to be controlled.

Next, in step #64, the terminal (OS) is set to “Hi”.
gh”, the release circuit (RL) starts operating, and a “Low” signal is applied to the base of the power supply transistor (BT) via the inverter (1N).
Thereafter, even if the photometric switch (MS) is opened, the transistor (BT, ) is self-maintained in a conductive state. When the release circuit (RL) starts operating, the exposure control mechanism (3) in FIG. 2 starts operating.

In the exposure control mechanism 3, when the aperture ring (not shown) starts the aperture operation, a pulse generator (PG) generates a number of pulses corresponding to the amount of rotation of the aperture ring.
) is input to the aperture control device (CA). The aperture control device (CA) counts the pulses input from the pulse generator (PG), and outputs the counted value to the output terminal (O
When the diaphragm control device (C
The rotation of the aperture ring according to A) is stopped. In this way, the aperture aperture of the photographic aperture device (APL) is determined.

In this case, if the camera device is, for example, a 7-rex camera, the operation of raising the reflecting mirror (RM) is performed at the same time, as shown in FIG. The above reflection mirror (RM) has been raised completely, and the shadowmost aperture device (
When the aperture aperture of APL) is determined, as shown in FIG.
Counting of the exposure time is started based on data input from the output terminal (OP) of the camera. When the camera device is set to flash photography mode using a strobe device (FL), when the shutter (SHT) is fully opened, the strobe device (F
A light emission start command signal is input to the terminal (JF) of L), and the strobe device (FL) starts generating flash light.

When the strobe side mode is TTL mode, when the integral value of the photometric amount by the film surface photometry circuit (described later) in the strobe controller (FC) reaches a predetermined value, the terminal (J
A light emission stop signal is input from the strobe device (FL) to the terminal (JF, ) of the strobe device (FL), and the strobe device (FL) stops emitting light. Regardless of whether the camera device is set to flash photography mode or constant light photography mode, the exposure time count value in the exposure time control device (CT) is μ-com ( 1
When the value of the exposure time data input from the output terminal (OP, ) of ) is reached, the exposure time control device (CT) starts running the trailing curtain in the shutter (SHT). When the rear curtain of the shutter (SHT) completes running,
The accidental exposure prevention switch (CS) is opened, and as shown in FIG. 3, the reflection mirror (lvlR) is lowered, the aperture of the photographic diaphragm (APL) is set to the open aperture, and the exposure operation is completed.

When the above exposure control operation is completed, the accidental exposure prevention switch (CS) is opened, and the output of the inverter (INS) is Low, that is, the input terminal (lz) of μ-com (1).
becomes "High", and in step #66, the output terminal (O,) becomes "Low", and the release circuit (RL
) stops operating, and the power supply transistor (B
TI) self-retention is released.

Next, in step #67, the interrupt terminal (it
) interrupt signals cannot be accepted, and the process returns to the start. If this and the external photometry switch (MS) are closed, read the data again in the same way as described above.
Calculation and display operations are performed. Also, when the accidental exposure prevention switch (CS) is open, the photometry switch (MS)
) is closed, reading, calculation, and indication are performed in the same way as described above, while μ-com (1) is in a state where it can accept interrupt signals, but when the release is Even if the switch (RS) is closed, the accidental exposure prevention switch (C3) is open, so the output of the AND circuit (AN) is held at "Low". Therefore, the interrupt terminal (it) of μ-com (1)
No interrupt signal is input to , and it is possible to reliably prevent μ-com (1) from performing an exposure control operation by mistake.

FIG. H shows a specific example of a strobe control device (FC) that interferes with the canora device of FIG. 2, and FIG. 12 shows a specific example of a strobe device (FL).

The equipment (FC
) and (FL) operations will be explained.

When the main switch (N/IAS) shown in Fig. 12 is closed, the strobe device (■Power L
), and the power-on resen i・circuit (
A set pulse is output from the PO output terminal (PR,), and the @circuit section of the strobe device (FL) is set.

When the changeover switch (SS,) on the SY robot side is switched to the contact (CU) side, the strobe device (Do1,) is set to the first mode F for the camera with the first flash photography control type. Ru. At this point, the output of the inverter (IN, 4) is “L”
ow”, the output of (IN, 5) becomes “High”, and therefore the output of the OR circuit (OR15) becomes “High”
This “High” signal is transmitted by transistors (BTs).
) is applied to the base of Therefore, the main switch (M
At the same time as the transistor (AS) is closed, the transistor (BT8)
becomes conductive, and the booster circuit (DD) starts boosting operation.

On the other hand, when the changeover switch (SS, ) is switched to the contact (EX) side, the strobe device (FL) is set to the second mode for the camera of the second flash photography control type. At this time, the output of the inverter (IN15) is “Low”,
On the other hand, the output of the OR circuit (OR+,) is "High" due to the power-on reset signal (PRa) mentioned above.
According to the "High signal" from the OR circuit (OR14) 1)
, flip-flops (FF, C) have been reset.

Therefore, the output of the OR circuit (orb, 8) becomes LO field. Therefore, just by closing the main switch (\'IAS), the transistor (BT8) does not conduct, and the layer pressure circuit (1) D ) does not work.

Close the photometry switch (4S) on the camera body side shown in Fig. 2, apply a "Low" signal to the base of the transistor (BT, ) to make the transistor (BTU) conductive, and turn on the power supply on the camera side. From the battery (BB) to the transistor (
When power is supplied to the power-on reset circuit (PO2) through the power-on reset circuit (BT,), the power-on reset circuit (PO-) outputs a power-on reset signal (PR, ) I2, and this power-on reset signal (PR2) The voltage is applied to the strobe control device (Do C) in Fig. 11, and the strobe control device (F
C) is reset.

Furthermore, when the photometry switch (MS) is closed, the output of the inverter (IN,) becomes "High", and the one-shot circuit (O8,) in the strobe control device (FC) in Fig. 11 becomes "High". Output a pulse.This'
The “High” pulse is output from the OR circuit (OR,), the terminal on the camera body side (JB5), and the terminal on the strobe device (FL) side (
JF, ) is applied to the set terminal of the flip-flop (FF13) in the strobe device (FL) in FIG. Therefore, the flip-flop (FF11) is set, the output of the OR circuit (OR, 8) becomes "High", and this "High" signal is sent to the transistor (BT8).
is applied to the base of the transistor (BT), the transistor (BT) becomes conductive, and the booster circuit (DD) operates. Further, the above-mentioned "Higb" pulse is applied from the terminal (JF, ) of the strobe device (FL) to the timer circuit (T1.), and this timer circuit (TL) receives the above-mentioned pulse for a predetermined period of time, e.g. , outputs a pulse when 0.5 seconds have elapsed. The pulse output from this timer circuit (TI.) is input to the reset terminal of the flip-flop (FF, , ) via the OR circuit (OR14), and
, ) are reset and the flip-flops (FF, , )
The Q output of becomes “Low”, and this “Low” signal is
Through an OR circuit (OR, , ), a transistor (BT,
) is applied to the base of the transistor (BT, ), and the transistor (BT, ) is turned off. Therefore, the booster circuit <DD) stops operating. This timer circuit (T11) is reset and performs a predetermined timing operation every time it receives one pulse from the terminal (JF1).

As mentioned above, the terminal (J) of the strobe control device (FC)
B,) to the terminal (JF) of the strobe device (FL).
While the “Igh” signal is applied at a cycle shorter than the above-mentioned predetermined time (1.5 seconds), the step-up circuit (DD) of the strobe device (FL) is activated, but the metering switch (MS) of the camera Honjo By opening the strobe device (F
After a short predetermined time of 0.5 seconds set in the timer circuit (TL) of L) has elapsed, the transistor (BT3) is turned off, and therefore the operation of the booster circuit (DD) is stopped. In this way, the booster circuit (DD) is enabled to operate only for the minimum necessary period, thereby preventing unnecessary consumption of power in the booster circuit (DD). Note that the timer circuit ('111) operates, for example, 10 times after receiving the first pulse.
1 to output a reset pulse after about a minute.
That's fine.

In addition, in the strobe device (FL,), when the flip-flop (F,) is set, both the flip-flop (FF, .) and the D flip-flop (D1o) are reset. Therefore, the output of the NOR circuit (No,) is ``Hi8h''.At this time, as will be described later, the output of the NAND circuit (NA) is ``H''.
Therefore, the AND circuit (AN
, , ) and the output of the OR circuit (OR=1) are both ``High''.Here, the above changeover switch (
When SS, ) is closed to the contact (■EX) side and the strobe device (FL, ) is set to the second mode, both input terminals of the AND circuit (AN7.) have "
High” signal is applied, and the AND circuit (AN24)
The output becomes "High". Therefore, the OR circuit (
The output of OR22) becomes “High”, and this High
”The signal is applied to the base of the transistor (BT6) to turn on the transistor (BT, ), and the transistor (B
T, ) is turned on, and from this transistor (BT7), a “High” signal is transmitted from the terminal (JF2) of the strobe device (FL) to the terminal (JB, ) of the strobe control device (FC).
A signal is sent out.

When the above-mentioned photometry switch (MS) is closed, when the terminal (O9) of μ-com (1) in the camera body shown in Fig. 2 becomes "High", the strobe control device shown in Fig. 11 is activated. The one-shot circuit (O3, ) of (FC) is turned on, and one pulse is output from the one-shot circuit (OS, ). At the rising edge of this pulse, the flip-flop (FF+) is set and the counter (CO, ) is reset. Then, each time one pulse is input from the frequency divider (DV) of the strobe control device (PC) to the D flip-flop (DF,) connected to the Q terminal of the flip-flop (FF,), At the rising edge of the pulse (DP), the Q output terminal of the D flip-flop (DFl) becomes "High". Note that the period of the pulse (DP) from the frequency divider (DV) is set to be shorter than the predetermined time of the timer circuit (T1.) of the strobe device (FL). This D flip-flop (DF
Every time the Q output terminal of
) is applied to the terminal (JF, ) of the strobe device (FL) in FIG. 12 via the terminal (JB, ). Further, a pulse generated from the AND circuit (AN, ) based on the pulse (DP) described above is applied to the counter (CO, ).

Furthermore, (A1) Every time the Q output terminal of the flip-flop (DF, ) becomes "High", one pulse is output from the one-shot circuit (OS) due to this "High" signal, and this pulse is sent to the inverter (IN7). is reversed by Then, in response to a "Low" pulse signal being output from the inverter (IN7), a "High" pulse having a predetermined pulse width is applied from the NAND circuit (NA) to the base of the transistor (BT, .). The transistor (BT, , ) is turned on while this pulse is applied4, thus transistor <BT,. ) is turned on, a "Low" signal is input to the terminal (JF2) of the strobe device (FL) in FIG. 12 via the terminal (JB, ) of the strobe control device (LC).

In the strobe device (PL) of FIG. 12, when the changeover switch (SSI) is closed to the contact (EX) side and set to the second mode, the strobe device (PL) shown in FIG. While the transistor (BT10) of the strobe control device (FC) is turned on, the strobe device (F
When a “Low” signal is applied to the terminal (JF) of L),
This "Low swing signal" is inverted by the inverter (IN, o), and this inverted pulse is sent to the AND circuit (AN).
ps) is output from the output terminal (FR'). and,
The pulse from the output terminal (FR) of the AND circuit (AN, , ) and the pulse (D
P) is an AND circuit (AN.

, ), a pulse corresponding to the pulse from the terminal (R) of the AND circuit (AN3.) is applied to the set terminal S of the AND circuit (AN, Ikara flip-flop (FF1o)). , the flip-flop (FF1
0) is set. Therefore, flip-flop (FF
) is set to “High”, and this “High”
"The signal is applied to one input terminal of the NOR circuit (NO), and from this NOR circuit (NO) the above AND circuit (AN1-
), a "Low" signal is applied to one input terminal of the AND circuit (AN22), and the output of the AND circuit (AN22) becomes "Low".

The Q output terminal of the above flip-flop (FF16) is “H”
When it becomes “High”, this “High” signal is applied to the - input terminal of the AND circuit (AN, 1). Therefore, the other input terminal of this AND circuit (AN11) is
A signal applied from the OR circuit (OR12) is applied to the base of the transistor (BT6) via the OR circuit (OR), (OR,), AND circuit (AN, ), and the OR circuit (OR). During the period when the transistor (BT) is on, the base of the transistor (BT) is “Low”.
A signal is applied to turn on the transistor (BT). In this way, from the terminal (JF:) of the strobe device (FI) to the strobe control device (FC) shown in FIG.
) is input with a "High" signal corresponding to the output of the above-described OR circuit (OR).

As mentioned above, the output terminal of the AND circuit (ANa, )]'
Every time one pulse is output from (FR), that pulse is sent to counter (CO.
) is applied to the reset terminal (RE) of the counter (C
O, ) is reset by a pulse from the above-mentioned OR circuit (OR10). And this counter (CO,)
counts the pulses (DP) input from the terminal (JB) of the strobe control device (FC) to the terminal (JF) of the strobe device (FL).

A decoder (DE, ) is connected to the counter (CO.), and the decoder (DE,) responds to the signals output to the output terminals (CF) to (CF:) of the counter (CO,). As shown in Table 2, “High” and “Low” signals “H” and “
Outputs “L”.

The terminal (b0) of the above decoder (DE,) is connected to the counter (
CO3) or the terminal (JF”) of the strobe device (FL)
It becomes "High" during the period from the falling edge of the first pulse inputted from to the falling edge of the second pulse. The “High” signal of this terminal (b0) is an AND circuit (AN26)
The signal is input to one input terminal of the AND circuit (AN, , ), and the completion signal output circuit (C
A fullness signal is input from D).

This fullness signal output circuit (CD) is a strobe device (FL).
) When the charging voltage of the main capacitor (C0) in the main capacitor (C0) reaches a predetermined value, a "High" charging completion signal is output, whereas when the charging voltage does not reach the predetermined value, the charging completion signal is not output. Therefore, the AND circuit (AN3,) connects the terminal (b) of the decoder (DE2).

, ), and also receives a charge completion signal from the charge completion signal output circuit (CD).
h” signal is output, and this “High” signal is sent to the OR circuit (
OR12) AND circuit (AN11), OR circuit (OR1)
3) and (OR21), the AND circuit (AN24), and the OR circuit (OR22).
is applied to the base of T), turning on the transistor (BT6) and thus turning on the transistor (BT') as well. By turning on the transistor (BT), a “High” signal is output to the strobe device (FL).
is input from the terminal (JF) to the terminal (JB, ) of the above-mentioned strobe control device (FC) on the camera body side. The "High" signal input to the terminal (JB, ) of the strobe control device (FC) described above is transmitted to the strobe control device (FC).
The result is applied to the serial input terminal (Sl) of the shift register (SR, ). When this shift register (SR,) receives the second pulse from the AND circuit (AN,), the shift register (SR,) receives the second pulse from the AND circuit (AN,).
Receives the “High” signal from AN3).

Next, the terminal (b,) of the decoder (DE,) is connected to the terminal 2 where the counter (CO,) is input from the terminal (JF1).
It becomes "High" during the period from the falling edge of the second pulse to the falling edge of the third pulse. This "High" signal is input to one input terminal of the AND circuit (AN71), and the TTL signal described below is input from the inverter (IN13) to the other input terminal of this AND circuit (AN71).
The connection is made so that a signal indicating which mode is selected, ie, external light mode or external light mode, is input. When the switch (MOS) is closed to the contact (TT) side and TTL mode is selected in the strobe device (FL), the inverter (IN12) outputs a "High" signal and the switch (MOS) closes to the contact (OU). When the side is closed and external light mode is selected, the inverter (
IN, , ) outputs a “Low” signal. The output signal of this inverter (IN13) is inputted from the terminal (JF) of the strobe device (FL) to the terminal (JF) of the strobe control device (FC) in the same way as the above-mentioned fullness signal, Furthermore, when the third pulse is received from the AND circuit (AN, ) via the AND circuit (AN3) of this strobe control device (FC), the shift register (S
R,).

In addition, in the same manner as described above, the terminals (b2) to (bs) of the decoder (DE, ) receive the third to sixth pulses that are sequentially input to the counter (CO3) via the terminal (JF, ). The "High" signals appearing at the terminals (b,) to (b,) of this decoder (DE), which become "High" sequentially in response to the falling edge of the AND circuit (A
N72) to (AN75) are each input to one input terminal. On the other hand, these AND gates (AN7,)
A signal representing the maximum light emission amount Ivmax of the strobe device (FL) is input from the decoder (DE) to the other input terminals of (AN, , ).

The signal representing the maximum light emission amount Ivmax is transmitted through the AND circuits (AN72) to (AN7.) in the same manner as the operation of the AND circuits (AN, , ) and (ANl) described above.
Sent to the terminal (JF) of the strobe device (FL),
Furthermore, the terminal (JB6) of the strobe control device (FC)
) are taken into the above-mentioned shift register (SR, ).

Output terminals (G,), (G) of the above decoder (DE,),
Table 3 shows an example of the relationship between the signals appearing in (G, ) and (G3) and the value of the maximum light emission amount 1vmax.

The input terminal of the decoder (decoder) E3) is connected to an adjustment mechanism (
Outputs a signal indicating the type of light emitting panel (not shown) used in the strobe device (FL) and the type of light emitting panel (not shown) used in the strobe device (FL). It is connected to the means (1''S).In addition, in the embodiment of 2,- as a panel for light emission,
In this configuration, either a wide-angle shooting panel or a normal shooting panel is used, J.
1), the decoder (DE,) has the above means (GS) and (P
Based on the two data input from S), data representing the maximum light emission Ivmax shown in Table 3 is output.

Furthermore, the terminals (b6) to (
1]6) is connected to the counter (c) via the above terminal (JF, ).
In response to the falling edges of the 7th to 9th pulses that are sequentially input to the 7th to 9th pulses, the signal becomes "High" in sequence. “” appearing on terminals (b6) to (b) of this decoder (DE, )
The "High" signals are sequentially input to the upper input terminals of each of the AND circuits (AN, 6) to (AN7.).

Then, these AND circuits (ANJ) to (AN,,
Signals representing the aperture value set for the strobe device (FL) are sequentially input from the decoder (DE, ) to the external input terminals of the strobe device (FL).

The input terminal of the decoder (]) E, ) is connected to the adjustment mechanism (
Aperture value signal output means (APS) linked with (not shown)
It is connected to the. The signals appearing at the output terminals (F.), (F,) and (F,) of this decoder (DE4),
Table 4 shows an example of the relationship with the set aperture value Av.

Set aperture value Av output from the above decoder (DE,)
The signal representing , is read into the shift register (SR, ) of the strobe controller (FC) in the same manner as the data output from the decoder (DE, ) described above.

In addition, as described above, the decoder (DF2) has l,
Then, when the 10th pulse input to the counter (com,) is 9-1000, the decoder (DE=j terminal (
b) is switched to "Low". This "Low" signal is input to the reset terminal R of the flip-flop (FF, .) via the OR circuit (OR, .), and the Q output terminal of the flip-flop (FF, .) is switched to "Low". Change. This “Low” signal, AND circuit (AN,,)
is input to one input terminal of the AND circuit (AN11
) becomes “Low”, and the NOR circuit (NO3
) output becomes “High”. In this way, the terminal (JF2) of the strobe device (FL) becomes “High” again.
h”.

On the other hand, when the 10th pulse (DP) is input to the decimal counter (CO, ) in the strobe control device (FC), a pulse is output from the carry terminal (CY), and this pulse is connected to the OR circuit (OF: ) is input to the reset terminal (RE>!) of the flip-flop (FF, ), and the reset terminal (RE>!2) of the flip-flop (FF, ) is input to both flip-flops (FF, ) and (DFl).
is reset, and the Q output terminals of both flip-flops (FF1) and (DFI) are both set to "Low". The "Low... signal output to the Q output terminal of the D flip-flop (DF, ) is input to one input terminal of each of the AND circuits (AN2) and (AN,), and both AND circuits (AN2) and (AN ) are both closed. Therefore, the maximum input from the terminal (JF, ) of the strobe control device (FL) to the terminal (JB6) of the strobe control device (FC) as described above is Reading of the data representing the light emission amount ■νmax and the set aperture value Av into the shift register (SR, ) is stopped. Also, the "Lo" of the Q output terminal of the flip-flop (FF, ) is stopped.
w" signal is input to the input terminal (i6) of μ-com (1). As a result, μ-com (1) transmits data from the strobe device (FL) to the strobe control device (FC). It is determined that the loading is completed.Furthermore,
The data read into the shift register (SR,) is transferred to the input port (I) of the delta selector (MPaj) shown in FIG.
P) and specified by the selection command signal input from μ-com (1) to the terminal (SL) of the theta selector (MP, ). -read into com(1).

In addition, in this example, diftrenosta (SR,
) is used as a 9-bit shift register,
Therefore, in order to input all the data read into the shift register (SR,) to μ-com (1), μ-
If the number of bits in com(1) is small, the process is divided into two or three times using a known method.

In addition, if the strobe device (FL) is not attached to the camera device, or even if it is attached, if the electronic source switch (MAS) of the strobe device (FL) is turned off, the shift register (SR1) All data input to is "0".

In this way, based on the data input from the data selector (MP, ) to μ-com (1) via the data bus (DB), it is determined that the strobe device (FL) is not attached to the camera device; and a power switch (M
AS) is not closed.

When the strobe device (PL) is switched to the switch (SS, ) or contact (CU) side and set to the first mode, the output of the inverter (IN14) is “Low”.
It is said that As a result, the gate of the AND circuit (ANp,) is closed, and the gate of the AND circuit (ANp,) is closed, and the gate of the AND circuit (ANp,) is closed.

2) Data such as Ivmax and set aperture value are not transferred. Therefore, the inverter (1N,
) becomes "High", and this "High" signal is input to one input terminal of the AND circuit (AN, .). Then, the AND circuit (A
N. ), the output of this AND circuit (AN20) becomes "High" when the completion signal is input to the input terminal of the other power. At this point, as will be described in detail later, until the X contact (SX) of the strobe control device (DoC) is closed,
The output of the AND circuit (AN, , ) is "Low", and the output of the inverter (IN, 6) to which the "Low' signal is input from this AND circuit (AN26) is "High".
Therefore, the AND circuit (AN25
) are both connected to the above-mentioned AND circuit (
“High” from AN2o) and inverter circuit (IN16)
h” signal is input, and the output of the AND circuit (AN,) is “
The “High” signal from this AND circuit (AN2.) is passed through the OR circuit (OR22),
It is applied to the base of the transistor <BT6), and this transistor (BT6) becomes conductive. When this transistor (BT6) becomes conductive, the transistor (BT, ) becomes conductive as described above. Therefore, from the terminal (JF2) of the strobe device (FL) to the strobe control device (F
A charging completion signal is input to the terminal (JB,) of C). In this way, when set to the first mode, the strobe device (FL) is transferred to the shift register (SR,) of the strobe control device (FC), unlike in the case of the second mode described above. , only the charge completion signal is always read as a "High" signal during data reading.

In the case of 2, as shown in Tables 3 and 4, when the second mode is set, the data to be read is coded so that it does not become all “High”. The operation mode of the strobe device (FL) can be determined to be the first mode.

An example of a method for performing the above strobe mode determination in μ-com (1) will be described below.

In the step consisting of the following steps, when the calculation mode for flash photography is commanded, it is first determined whether the mode is the first mode. This determination result.

If it is determined that the mode is not the first mode, the process moves to step #101 in FIG. 9 and the above-mentioned calculation is performed.

On the other hand, if it is determined that the mode is the first mode, the exposure time is set to 1/250 sec, and the aperture is set to the set aperture value preset for the flash device (FL),
Thereafter, the process moves to step #140.

Next, a description will be given of an operation for inputting data corresponding to a range in which the flash light emission amount can be properly controlled by the strobe device (FL), that is, a so-called interlocking range, from the camera body to the strobe device (FL).

In FIG. 11, the terminal (01,) of u-com (1)
When the signal becomes “High”, this “High” signal is applied to a one-shot circuit (OS, ), and from this one-shot circuit (OS, ) one pulse with the desired pulse width or a flip-flop (FF) is applied. ) and the reset terminal (RE) of the counter (CO). Therefore, the output terminal Q of the flip-flop (FF, )
becomes "High", and this "High" signal is input to one input terminal of each of the AND circuits (AN3.) and (ANJ). Further, the counter (CO, ) is reset, and the count content of the counter (CO) becomes zero.

Furthermore, the pulse output from the one-shot circuit (OS, ) is inverted by the inverter (IN,), and this inverted pulse is applied to the base of the transistor (BT10) via the NAND circuit (NA,). The transistor (BT, . . . ) is turned on.

In addition, the terminals (JB,
) to the terminal (JF, ) of the strobe device (FL, ) in Figure 12.
, ), a “Low” signal is input to the strobe device (
The output terminal (FR) of the AND circuit (AN25) of FL) becomes "High" as described above. At this time, the terminal (JF, ) of the strobe device (FL) is “Low”
This “Low” signal is connected to the inverter (IN
z) is inverted to “High” and the AND circuit (AN
15) is input to one input terminal. Further, the other input terminal of this AND circuit (AN, , ) is connected to the “High” signal from the output terminal (FR) of the above-mentioned AND circuit (ANzs).
” pulse is input. Therefore, this AND circuit (A
A pulse is input from the flip-flop (FF1.) to the set terminal S of the flip-flop (FF1.), and the flip-flop (FF) is set and its Q output terminal becomes "High". , are input to the D input terminal of the D flip-flop (DF10).

When one pulse (FCP) of a predetermined frequency is input from the oscillation circuit (FOS) to the clock terminal (CL) of this D flip-flop (DF10), the Q output terminal of this flip-flop (DFIQ) “High”
become. This "High" signal from the Q output terminal is input to AND circuits (AN16) and (AN17).

Therefore, the oscillator (F'0
! The pulse (FCP) from C) is output, and this pulse is sent to the counter (CO,) and shift register (SR,).
are input to the clock terminals (CL) of the OR circuits (OR13) (OR21), AND circuits (AN,
), OR circuit (OR22), transistor (BT.),
(BT,) to the terminal (JF,), and from the camera Kimoto side terminal (JB) to the clock terminal (CL) of the above-mentioned reset counter (CO.) via the AND circuit (AN). =A Q output of D flip-flop (DF10) is “High”
”, the one-shot circuit (OSil) becomes “H”.
A pulse of "high" is output, and the shift register (SR:) is reset via an OR circuit (OR).

Also, the counter (CO.) is activated by the pulse from the terminal (FR).
is reset via an OR circuit (OR16).

The counter on the strobe control device (FC) side (CO2 is the strobe device (FL) input from the AND circuit (AN4).
) is a counter that counts pulses (FCP) from
This output is input to the decoder (DE1). , this decoder (DEl) is the decoder (DE.) in FIG.
As the output data of the counter (CO2) increases by 1, the terminal (aOL(al)
. . . (an) sequentially outputs a "High" signal.

Here, the following explanation will be given assuming that the Dvmax data transferred from the camera body to the flash device (FL) is n-bit data.

When the first pulse (FCP) is input from the AND circuit (AN, ) to the counter (CO, ), the terminal (a.) of the decoder (DE,) becomes "High" at the rising edge of this pulse, and at the rising edge of the second pulse It is “High” until the end.

This opens the gate of the AND circuit (AN,),
Dvm from the output port (OP, ) of μ-com (1)
The data of the most significant bit of the data of ax is connected to an OR circuit (OR5), an AND circuit (AN, , ), an OR circuit (OR
, ) from the terminal (JB, ), and is applied from the strobe side terminal (J1 color) to the serial input terminal (SI) of the shift register (SR) via the AND circuit (AN, , ). This shift register (SR3.) is designed to take in data at the falling edge of the pulse (FCP) from the AND circuit (AN, , ), so the first pulse (
FCP) falls to the top of Dvmax.

When the data of 1 is taken in, the terminal of the decoder (DE) is input at the rising edge of the second pulse (FCP).
al) becomes “High” and the third pulse (FCP
) remains “High” until the rising edge of the signal. Next, the second bit of Dvmax data is output from the AND circuit (AN=+) on the strobe control device (FC) side, and this data is taken into the shift register (SR) at the falling edge of the second pulse (FCP). It will be done. The same operation is repeated, and the terminal (an) of the decoder (DE, ) becomes "High" at the rising edge of the n+1st pulse (PCP), and the
+ “High” until the rise of the second pulse (FCP)
Continue. During this time, Dv from the AND circuit (ANhn)
The data of the least significant bit of min is output, and this data is taken into the shift register (SR2) at the falling edge of the (n+1)th pulse (FCP).

The counter (CO,) is an n+binary counter,
Carry terminal (CY) for n+2nd pulse (FCP)
This pulse is output from the flip-flop (FF13) and the flip-flop (I
) is applied to the reset terminal of node 1o), these are reset and the gates of the AND circuit (LAN1s)+(AN1, ) are closed. At the falling edge of this last (n+2)th pulse, the shift register (SR8) becomes “High” or “
Either take in the "Low" signal or do not give the data of the least significant bit to the constant part (DP, ).On the other hand,
On the camera body side, the counter (CO2) is similarly n+2
It is a forward counter, and the n+2nd pulse (FCP
) rises, all outputs of the counter (CO, ) are “
The output terminal (a) of the decoder (DE1) becomes "Low".

)(an) all become “Low”.

The terminal (an) of the decoder (DE) is an OR circuit (OR1)
It is connected to the reset terminal of flip-flop (FF2) through hand,
The gates of AND circuits AN4, (ANs) are closed.

Also, the Q output of the flip-flop (FF) is μ-com
The input terminal (is) of (1) is connected to L, and μ-com (1) determines that the data transfer is completed when this terminal (is) becomes “Low”.

In the strobe device (FL), the display section (DP) displays the interlocking range of strobe light emission based on Dvmax and Dvmin data sent from the camera body. The switch (DS) is a switch that changes the display contents; when it is closed to the terminal (m) side, it displays meters, and when it is closed to the terminal (ft) side, it displays feet. The interlocking range is the display part (DP,) on the camera body side.
Also displayed by

The display part (DP,) is on the back of the strobe, the display part (DP, )
It is desirable to display this in the viewfinder, on the top of the camera, or on the back cover.

The timer circuit (TI) is a one-shot circuit (OS4)
A pulse is output from , and a pulse is output after a period of time sufficient to transfer Dvmax and Dvmin to the strobe. This is the terminal (an) of the decoder (DEL) when the strobe device (FL) is not attached to the camera body.
This is because the flip-flop (FF, ) is not reset after being set, since it never falls from "High" to "Low". Therefore, the timer circuit (TI
, ) resets the flip-flop (FF, ) via an OR circuit (OR) after a time sufficient for data transfer.

Next, the operation of detecting whether a charge completion signal is output from the strobe device (FL) when the release switch (RS) on the camera body side is closed is shown in Figures 11 and 1.
Figure 2 will be explained later.

When the release switch (RS, ) is closed, the terminal (O8) of u-com (1) shown in Fig. 11 becomes “High”.
This “High” signal is a one-shot circuit (OS
e) is applied. The second one-shot circuit (OS) outputs a "High" pulse having a predetermined pulse width, and this pulse is applied to the set terminal S of the flip-flop (FF), and the The Q output terminal of becomes "High". “Hi” of this Q output terminal
gh” signal is input to the D input terminal of the D flip-flop (DF2).Then, the D flip-flop (DF,
) When the clock pulse (DP) of the frequency divider (DV) is input to the clock terminal (CL) of the
The Q output terminal of this D flip-flop (DF2) is “H”
The “High” signal of this Q output terminal is applied to one input terminal of the AND circuit (AN,) to which the clock pulse (DP) is input from the frequency divider (DV), and the The clock pulse (DP) is sent from the circuit (AN, ).This pulse (DP) is sent to the 12th The strobe device (FL) shown in the figure
) is input to the terminal (JF, ).

In addition, the “High” signal of the Q output terminal of the D flip-flop (DF) is connected to another one-shot circuit (
OS10). Then, from this one-shot circuit (OS10), one predetermined pulse width “High” is output.
” is output, and this pulse is passed through the inverter (I
) is inverted and input to one input terminal of a NAND circuit (NA). And this NAND circuit (NAs
) outputs a "High" pulse having a pulse width corresponding to the pulse width from the one-shot circuit (O810) described above. This pulse is a transistor (BT
,. ) is applied to the base of the transistor (BT).

) is turned on for a period corresponding to the pulse width of the above pulse. Therefore, the terminal (J
B, ) to the terminal (JP, ) of the strobe device (FL),
A "Low" pulse having a pulse width corresponding to the period during which the above-mentioned transistor (BT, .) is turned on is input. .

The pulse applied to the terminal (JP2) of the above-mentioned strobe device (PL) is applied to the inverter (■N20) as mentioned above.
) and applied to one input terminal of the AND circuit (ANzs). In this way, the output terminal (FR) of this AND circuit (AN2.) outputs a pulse having a predetermined pulse width. At this time, the strobe device (FL)
As described above, pulse 2, (DP) is input from the strobe control device (FC) to the terminal (JF, ) of ).
This pulse (L)P) is applied to a flip-flop (1:F1o
) is input to the set terminal -8, the "7"/block flop (FF1o) is set, and its Q output terminal becomes "Hi".
This “High” signal is a NOR circuit (N
o,) and is inverted to “Low” through the AND circuit (A
N22) and the other input terminal of the AND circuit (AN=).

On the other hand, the counter (CO,) of the strobe device (FL) is
Upon receiving the above-mentioned pulse (DP) input to the terminal (JFl), the count becomes "0001". The terminal (
b,) becomes 'High', and this 'HiHh' signal 1 is applied to the -power input terminal r of the AND circuit (AN7°).Therefore, this AND circuit (AN, o) &) The fullness signal output r!! mentioned in F is added to the input terminal of the pond power!!
The belief from the first circuit (C1)) is the above-mentioned L2, OR circuit (OR12), AND circuit (AN11), OR circuit (OR13) and (OR2,), and AND circuit (AN2).
4) Through the OR circuit (OR,), transistors (BT6) and (BT7), the strobe device (FL, )
is sent to the terminal (JF'2). In this way, the above-mentioned fullness signal is sent to the terminal (JP2) of the strobe device (FL).
to the terminal of the strobe control device (FC) on the Kimoto side of the camera (
JB).

In addition, in the strobe control device (FC), when the Q output terminal of the D flip-flop (DF2) becomes "High", the pulse (DP) from the frequency divider (DV) is sent to the AND circuit (AN6). Sent from This pulse (
DP) is inputted from the reset terminal R of the flip-flop (FF3) to the reset terminal (RE) of the D flip-flop (DF, ) via an OR circuit (OR, ), and both flip-flops (FF, ) and (DF.) are both reset at the falling edge of the pulse (DP). In this way, the strobe control device (FC) on the camera body side
) to the strobe device (FL), one pulse (DP)
or sent.

On the other hand, in the strobe control device (FC), the flip-flop (FF3) is set and its Q output terminal becomes "High", and this "High" signal is input to the D input terminal of the D flip-flop (DF, ). After being
Clonk terminal CL of this D flip-flop (DF,)
At the rising edge of the pulse (DP) input from the frequency divider (DV), the Q output terminal of this D flip-flop (DF) becomes "High". Furthermore, the frequency divider (D
The next pulse (DP) from D flip-flop (D
When input to the clock terminal (CL) of F,), D
The Q output terminal of the flip-flop (DF, ) is “High
”. Then, the above D flip-flop (DF3)
The “High” signal of the Q output terminal of the
, ) is input to one of the input terminals. Therefore, as described above, the fullness signal inputted from the strobe device (FL) to the terminal (JB, ) of the strobe control device (FC) is sent out from the AND circuit (AN7).

Further, the "High" signal of the Q output terminal of the D flip-flop (DF,) is inputted to one input terminal - of the AND circuit (AN, , ), and the AND circuit (AN51)
A "High" pulse is sent from. In this way, from the AND circuit (ANsl), another “High
When a pulse of “h” is output, the AND circuit (AN7
) to the D flip-flop (DF, ), the fullness signal from the above-mentioned fullness signal output circuit (CD) is input, and the Q output terminal of this D flip-flop (DFS) is
”, and this “High” signal is the μ-eom signal described above.
It is input to the input terminal (j7) of (1).

In this way, the fullness signal is input to u-com(1).

Further, the pulse sent from the AND circuit (ANl,) is passed through the OR circuit (OR,) to the reset 7F terminal (RE
), and the Q output terminals of both I] flip-flops (DF3) and (DF4) are both set to "Low". Then, the "Low" signal of the Q output terminal of the D flip-flop (DF3) is transmitted to the strobe device (F1.
) is input to the input terminal (16) of .mu.-com (1) as a signal indicating that the reading operation of the fullness signal from .mu.-com (1) is completed.

On the other hand, in the above-mentioned strobe device (FL), when the flip-flop (FF, o) is sent as described above, the )(i8h" signal of the Q output terminal of this flip-flop (FF, .) The second timer circuit (TIs) is input to the strobe device (FL,
) is appropriately set to a time longer than the time required to transfer the fullness signal from the strobe control device (FC).

The timer circuit jTI8) outputs a "High" signal when the above-mentioned set time has elapsed;
gh” signal is sent to the reset terminal (RE) of the counter (CO3) via the OR circuit (OR, , ) and the OR circuit (
It is input to the reset terminal R) of the flip-flop (FF, .) via OR, .), and the counter (com,) and flip-flop (FF, .) are reset at the same time. When transmitting the fullness signal from the strobe device (-L)h to the camera body, only one pulse is given to the counter, so the timer circuit (TIs) is By providing this, the output of the counter (com,) is held at "0001" for an unnecessarily long time, and the flip-flop (FF, .) is set to "0001".
It is possible to prevent it from being held in the 7-point state.

− F strobe device (pulse (+) 1) input to terminal Fl=j (JF, )) and a full charge signal output circuit (CD
) and the “High” signal from the 3-input AND circuit (A
111B) is input to the two input terminals of ν.
Here, the output terminal (T'R) of the AND circuit (AN,,) is connected to the other input terminal of the AND circuit ()\N18).
When nokurusu is input from , the second AND circuit <AN2
The pulse from S) is input to the output terminal S of the flip-flop <FF, □) via the AND circuit (ANls), and is also input to the output circuit (OS, , ). Therefore, the flip-flop (FF12) is set, and the one-shot circuit (OS12) is
A "High" pulse having one predetermined pulse width is output. The pulse width output from this one-shot circuit (OS) is determined by the terminal (JF) of the strobe device (FL).
The period is set to be longer than the period of the pulse (DP) input to the DP. In this way, when a plurality of output read command pulses (DP) are input to the terminal (JF), one pulse is output from the one-shot circuit (OS, one pulse (DP) terminal (
Complete the input to JF), omit it, and pass it from the AND circuit (AN, , ) to the OR circuit (OR),
By inputting the signal to the reset terminal (R) of the flip-flop (FF), the flip-flop (FF) can be reliably reset.

On the other hand, after the release switch (RS) is closed,
When only one pulse (DP) is input to the terminal (JF1), the pulse is sent out from the AND circuit (AN1.), and the flip-flop (FF12) is held in the set state. At this time, the switch (SS) is the contact (EX)
Therefore, the inverter (IN,...
) is “High”, this “High”
h” signal is an AND circuit (AJ3.) and an OR circuit (AJ3.).
It is inputted to one input terminal f of the AND circuit (AN, , ) via OR, , ). Therefore, the strobe control device (F
When a strobe light emission start command signal is input from the terminal (JB) of C) to the terminal (JF, ) of the strobe device (FL), the strobe light emission start command signal is The signal is sent to the strobe light emission control circuit (FLC) via the antenna circuit (AN2.). In other words, when the second mode is set and a full charge signal is output, if a release switch (RS) opening signal is input from the camera body, the strobe is enabled to emit light.

Assume that the X contact (SX) of the strobe control device (FC) is now closed. At this time, the strobe control device (FC)
The terminal (JB) of the ) is entered. Therefore, the one-shot circuit (OS, , ) outputs one "High" pulse, and this pulse is output by the above-mentioned AND circuit (AN
=, ) is input to the other input terminal. As mentioned above, when a "High" signal is input from the OR circuit (OR1.) to one input terminal of this AND circuit (AN, ,), the signal from the one-shot circuit (0; The output pulse is sent to the light emission control circuit (FLC) via the AND circuit (AN). As a result, the xenon tube (Xe) is connected to the light emission control circuit (FLC) using a known method.
A trigger signal for light emission command is applied to the hesenon tube (
Xe) enables the generation of flash light.

On the other hand, as mentioned above, the one-shot circuit (OS13)
The pulse output from is given to the NAND circuit (NA) via the AND circuit (AN, ), and
Set the output of A) to "Low". Therefore, the Nando rotation (
NA), AND circuit (AN5.), OR circuit (OR:)
, the one-shot circuit (OS1, ) with a pulse width according to
w" pulse is input. This pulse is inverted by the inverter (IN, , ) of the strobe control device (FC:) and applied to one input terminal of the AND circuit (AN). At this time, A “High” signal that instructs the start of the release operation of the shutter (SHT) has already been output to the terminal (0,) of μ-com (1), and this “High”
gh'' signal is applied to the other input terminal of the AND circuit (ANa).

Therefore, a "High" pulse is output from this AND circuit (AN), and this pulse is a flip-flop.

The signal is applied to the set terminal (S) of the flip-flop (FF, ), and the Q output terminal of the flip-flop (FF, ) is set to "High". The “High” signal at the Q output terminal of this flip-flop (FF, ) is applied to one input terminal of the AND circuit (ANs), and the transistor (BT
, ), and the transistor (BT, ) is turned off.

On the other hand, a regular light signal representing the film surface photometry result based on the strobe light is applied to the transistor (BT1) from the operational amplifier (OA) of the photometry circuit (ME) shown in FIG. A collector current flows through the collector in accordance with the intensity of the strobe light on the film surface of the camera device. The collector current of this transistor (BT) is integrated by the capacitor (C,).
When the main light source is used, this terminal becomes "Low". Therefore, in the fill-inflasb mode, the analog switch (AS, .) is conductive and the low voltage source (CE
5. ) is input to the comparator (t\0), and when the strobe device (IF+-) is the main light source, the output of the inverter (IN, , ) is “High”.
The analog switch (AS,) becomes conductive and the constant voltage source (CE) becomes conductive.

The voltage signal from l) is input to the comparator (AC). The ratio of the signal voltage of the constant voltage source (CE20) to the signal voltage of (CE21) is 3:4, and when converted into an apex value, the value of (CE20) is smaller by 0.5 Ev. And a constant voltage source (CE).

The signal voltage from 1) corresponds to the appropriate exposure level.

When the integral value of the capacitor (C,) (i.e., the integral value of the amount of reflected light from the subject illuminated by the strobe light TTL photometry) reaches the output voltage of the constant voltage source (CE20) or (CE21), the comparator ( ACl) output?
“High” and one-shot circuit (OS) outputs “
At this time, if a signal indicating TTL mode is read in the shift register (SR,), an AND circuit (AN9), an OR circuit (OR,
), a pulse is sent to the terminal (JF, ) of the strobe device (FL) (FIG. 12) via the terminal (JB, ), and the light emission is stopped.

Here, when in fill-in flash mode,
When the exposure amount level to the film (FIL) reaches a level 0.5 Ev below the appropriate exposure level, the light emission is stopped, and when a strobe device is used as the main light source, the light emission is stopped when the appropriate exposure level is reached. Is this the first
This corresponds to the case where the value of 1 is set to 0.5Ev as detailed in FIG.

The pulse from the AND circuit (AN,) is
10) is also entered. This timer circuit (T11o
) outputs a "High" pulse after the above pulse is applied and a light-length time has elapsed for the strobe to fully emit light, resets the flip-flop (FF5), turns on the transistor (BT4), and Circuit (AN,)
Close the gate. Furthermore, D flip-flop (D
F5) is also reset.

In a strobe device (FL), a one-shot circuit (
The “High” pulse from OS13) is output by the AND circuit (
When output from AN26), the flip-flop (FF
14) is set and its Q output becomes "High". At this time, if the changeover switch (MOS) is switched to the contact (OU) side, that is, if the external light mode is selected, the outputs of the inverters (IN18) and (IN19) both become "High". . Therefore, the NAND circuit (N
The output of A) becomes "Low", and this "Low" signal is applied to the base of the transistor (BT,), turning off the transistor (BT,) and opening the gate of the AND circuit (AN,). It will be done. And the xenon tube (
A strobe device (FL) that receives reflected light from the subject via the receiving aperture (AP) when
) side phototransistor (PT) is integrated by a capacitor (C2). This capacitor (C,)
When the integral value reaches a value corresponding to the film sensitivity from the variable voltage source (VE,), the output of the humparator (AC2) becomes "High" and the one-shot circuit (OS,
, ) outputs a “High” pulse. This pulse is sent to the light emission control circuit (AN28) via AND circuits (ANs) and OR circuits (OR, , ), and is sent to the xenon tube (
The light emission of Xa) stops.

On the other hand, when the changeover switch (MOS) is switched to the contact (TT) side and the TTL mode is selected, the output of the inverter (IN40) becomes "High" and the gate of the AND circuit (AN2.) will be held. Therefore, the one-shore circuit (O39) of the strobe control device (FC)
The light emission stop signal is sent to the terminal (JF) of the strobe device (FL) from the AND circuit (AN).

), the light emission control circuit (F
LC), and the xenon tube (Xe) stops emitting light.

The light emission starting pulse from the AN1ζ circuit (AN, , ) is
It is also applied to the timer circuit (TI2), and this timer circuit (
T1. ) counts the time required for the A.senone tube (Xe) to fully fire. Then, when the time set in the timer circuit (TL) has elapsed, the pulse output from the timer circuit (T12) is sent to the reset terminal (R) of the flip-flop (FF, , ) via the OR circuit (OR1g). is applied to reset the flip-flop (FF12), and is also applied to the reset terminal (R) of the flip-flop (FF, 4) via the OR circuit (OR23) to reset the flip-flop (FF, , ) → Ru.

When the strobe device (Flj switching inner<8:"l1) is switched to the contact (CU) side and the ft51 mode is selected, the output of the inharter (IN,,) is "I(
Then, the fullness signal output circuit (CI))
However, if the fullness signal is output, the AND circuit (AN2
．． ), the output of the OR circuit (OR20) becomes "High", and the gates of the AND circuits (AN, . . . ) are opened, making it possible to emit light. Also, if the X contact (SX) is open in this state, the output of the inverter (IN, 6) will be “H”.
Therefore, the output of the AND circuit (AN2-) becomes "High", and this "High" signal is sent to the terminal (J-do2) via the 37 circuit (0R22) transistors (Br3) and (BT, ). This fullness signal is output as a fullness signal. This fullness signal is read as a signal of all "1s" in the Sl-I Cobo control device (FC), that is, it is determined that the mode is the first mode, and the above-mentioned calculation operation is performed. will be carried out.

When the X contact (SX) of the strobe device <rX'L) is closed, the ant'
One John 1 circuit (O3, 3) from the circuit (AN, e)
A pulse is output by the inharter (I
N16) is inverted and made into a "Low" pulse, and this pulse is connected from the terminal (JF, ) of the strobe device (t"L) to the terminal r- (JBゎ) of the strobe control device (FC) to the strobe device (FL). ) is input as a signal indicating the start of light emission from the flash control device (
The light emission stop signal input from the AND circuit (A
N27), Oh? It is sent to the light emission control circuit (FLC) via the circuit (OR2,). On the other hand, when the external light mode is set, the light emission stop signal from the one-shot circuit (OS, , ) is sent to the AND circuit (AN28) and the OR circuit (OR24).
The light is sent to the light emission control circuit (Fl, C) via the xenon tube (Xe), and the light emission of the xenon tube (Xe) is stopped.

(Fl) CI) (Fig. 11) of the strobe control device (FC) and (E”DC2) (Fig. 12) of the strobe device <1”L).
Figure) shows her husband Noah, one-shot circuit (O3,), (O3
This is a display device for confirming dimming that 1) indicates that the dimming operation has been performed using the respective light emission stop signals from , , ).

In the strobe control device (FC), a signal indicating the TTL mode is read by the shift lens star (sR,), gate Y of the AND circuit (AN,) is opened, and -)
, an external display device (Fl) indicates that a light emission stop signal has been output.
C,) displays a message for a certain period of time to confirm whether the light adjustment of the camera device is appropriate. - In the strobe device (PL), when the light emission stop signal is output from the OR circuit (OR, , ), the display device (FDe2
) performs a display for a certain period of time to confirm dimming, similar to the display device (Fl) C1).

Figure 13 shows a specific circuit example of the interface circuit (■F) and lens side circuit (LEC) in Figure 2, and Table 5 shows the information stored in the lens side ROM (RO, ). Table 61 shows the contents of the data stored in the address of iROM (RO).

The address “00000001” of RON (RO) is
Check data "11100" for electrically detecting lens attachment on the camera Honda side is stored. This address "00000001" contains data "111" with the same value as check data, regardless of the type of lens attached to the camera body.
00" is memorized. The data for this check is not limited to 11100", but may also be pond data, which is common to all types of lenses.
).

The address "00000010" contains the data of the open aperture value AVo described in iij.1. meeting, is “00000
The data of the maximum aperture value Avm is stored at the address 011''.

Data on the shortest focal length fw of the zoom lens is stored at the address "00000100".

Note that in the case of a fixed focal length lens whose focal length is not variable, the focal length data of that lens is stored at this address. At the address "00000101", negative data of the longest focal length of the zoom lens is stored.

In the case of a fixed focal length lens, data "11111" indicating that the lens has a fixed focal length is stored. The data of the longest photographing distance Dvoo is stored at the address "00000110". The above data is the fixed data of the lens.

At addresses "00010000" to "00011111", shooting distance data as variable data is stored. The shooting distance information output device (DS) outputs the data of the L-11 bin), taking into account the amount of movement of the distance ring (not shown in the figure) from the infinite position, and with this data, r3 to r9 of the address data. The address of the lower 4 bits is designated and the data of the photographing distance (absolute value) stored in the corresponding address is output. An example of one lens is shown in Table 7.

As is clear from Table 7, the data up to 11m from the infinite He device corresponds to Dv=8.5, and the data from 14 to 16m corresponds to Dv=8.5.
Here, the data corresponds to Dv=3.0. Similarly, if the distance is shorter than 1.4 m, Dv=1. In addition, the data of Dvoo mentioned above is ノ(In case of S, 1.,
) corresponds to the data "11+1 (11") of a≠W゜5.
Therefore, as mentioned above, the shooting distance data Dv is "1".
1001" data, it is located with the Dvoo data, so when using this data, an infinity warning indicating that flash photography is impossible is displayed on the display device (FIP) shown in Figure 2. ) 7.).

In addition, the address from the shooting distance information output device (DS),
Increase the number of bits of data for ROM (1<O)
The number of bits of data increases by 1, and the bits of data tend to increase by 1.
+J Noh.

Addresses "00100000" to "00101111" store focal length data set in the case of a zoom lens. ``Fixed focus lens?'' Where used, indicating that it is a fixed focus lens, e.g. ``111''
11'' data are stored in the respective addresses of the radar.Similar to the data of the photographing distance Dv, the focal length information output device (FS) is stored in the following addresses of the radar.
Shortest focus F[) of lens zoom ring (not shown)
Movement from one position to another h1. A 1-bit digit is output depending on the month, and this data is used to fill r of the address data.
3 to r. The address of the lower 4 bits is specified, and the focal length (absolute value) data stored there is output. (IF), the output terminal (O6) of μ-com (1) is “H”.
When it becomes "high", a pulse with a predetermined pulse width is output from the one-shot circuit (OS3.), and the flip-flop (FF30) is set based on this pulse.

Then, by setting the flip-flop (FF30), the AND circuit (A
A clock pulse (CPL) is input to the clock terminal (CL) of the D flip-flop (DF3o) via the D flip-flop (DF3o). Therefore, at the rising edge of the next clock pulse, D
Q output of flip-flop (DF30) is “High”
becomes. The Q output of this D flip flop (DF30) allows counters (CO16), (CO11) and (C
O12) is released from the reset state, and the decoder (DE1
1) and (DE12) are both ready for output. Also, Ri II Tsukupapal (C]P, L-,) is Inter 7
It is sent from the terminal (JB) of the ground circuit (IF) to the terminal (JL, ) of the lens side circuit (LEC). On the other hand, the output terminal (O6) of u-com (1) in Fig. 2 is “High”.
When this happens, the power supply transistor (BT2) shown in Figure 2 becomes conductive, and the terminal on the camera side (JB) connects to the lens side circuit (
Predetermined power is supplied to the power supply terminal (JL) of the LEC. When a predetermined power is supplied to the above power supply terminal (JL,), a pulse is output from the Baso Onrya 71 circuit (ho,). (FF, , ) and D flip-flop (DF
31) are both reset, while the flip-flop (FF34) is set at the rising edge of the L pulse. Then, at the falling edge of the first clock pulse (CPL), the Q output of the D flip-flop (DFII) becomes “Hi”.
This “High” signal causes the counter (
CO15) and CO16 are both reset or released, and the decoder (DL15) becomes ready for output.

This completes the preparation for starting data input/output operations.

Interface circuit (IF) counter (coml1
), decoder (DE11) and lens side circuit (LEC
) counter (CO1s) and decoder (DE15) are
People, both the main body side and the lens side (4j
There is a circuit that outputs a timing signal to synchronize with I.

The counter (com, o) is a 4-bit hexadecimal counter that counts clock pulses (CP), and the power counter (CO15) is a 4-bit hexadecimal counter that counts clock pulses (CP). The lower 3 bits (CB2), (CB1), (CB6), and (CB1) of the counters (CO10) and (CO11) are respectively stored in the power and output terminals 4, tecoders (1) and (DE,). CL2)
, (CL1) and (CLo) are input, and one of the output terminals (TB) to (TB,) and (TL,) to (TL,') is input according to the data of these lower 3 bits. of"
High”.

Table 8 shows the state of this output from the decoder (DE11) and (D
An example of the relationship between input and output in E15) is shown.

In addition, the terminals (TB,) and (TL,) or “High
The timing when the terminals (TB) and (TL, ) become "High" is determined by the timing of (TB9) and (TL), respectively,
” timings are respectively referred to as (TB1) and (TL1) timings.

The counter (COI) of the above interface circuit (1F)
, ) is a counter () which counts -4 pulses output from the output terminal (CB3) of the counter (CO10). , the output of the second counter (CO,) CS2
) to (CS, ) and the output (CB
j) is input to the decoder (I) [false, ). Then, this decoder (DE12) has a counter (CO11).
) output and counter (com, o) output (CFs3'
), one of the terminals (SO) to (S1.) is set to "High". The "High" signal output from the Tehuda (DE, , ) of , - determines the step of outputting address data from this interface circuit (1F) to the lens side circuit (LEC) and the step of reading lens data. 1 piece of rice is used. Below are the terminals (
A step designated when the terminal (Sl) is "High" is called a step (So), and a step designated when the terminal (Sl) is "High" is called a step (Sl). Table 9 shows an example of the relationship between the input and output of the decoder (DEl2).

Shift register (SR) of interface circuit (IF)
, o), an 8-bit shift register is used. Terminals (Ba3) and (f3a) of this shift register (SR, ,)
F) and (Ba1) have counters (CO12
) are connected, and these terminals (BA)
, (Ba=), (13A) to 1 input terminal (Ba
7) to (BA) and (Bao) are commonly grounded.

This shift register (SR,,) switching terminal (SP
) is "High", data is taken in one column to the input terminals (Ba7) to (BA) at the rising edge of the clock pulse (CP) input to the clock terminal (CL), and the -. , Switching edge-(8P) is soil (IIU”
When the clock pulse input to the clock terminal - (CL) rises, the corresponding shift register (SR
,. ) is output to the output terminal (OUT) sequentially from the upper focus to the iα column.

The input terminals P of -no.j of the AND circuits ()\N31) and (ALL, , ) are commonly connected to the output terminal of the oscillator (OSC), and both the AND circuits (AN31) and (
) to N, 2) is the same 11, and the extra clock pulse (CP)
is now entered. And the AND circuit (
AN3. ) is connected to the terminal (TB6), and the other input terminal of the AND circuit (AN3.) is connected to the terminal (TB7) of the dehooder (DE, .). Furthermore, the output terminal of the AND circuit (AN31) is the flip 7
It is connected to the 77F terminal 2f of the 0p (FF33), and the AND circuit () to N3. ) output terminal is a flip-flop (F
l-', 3) Connected to the glue set terminal. The Q output terminal of this flip-flop (1"F, .) is connected to the switching terminal (SP) of the shift register (SR,.).
(3J) is set at the falling edge of the clock pulse (cp) output at the timing of (TB, ), and (1I
The clock pulse (C
It is reset at the falling edge of P). Then, when the output terminal T-(TB,) of the decoder (DE, , ) becomes ")Iigh", the shift register (SRlo) outputs 4F.
The data is taken into the column, and the data taken in at timings (TBo) to (TB7) are output in series. NaJ
3. AND circuit (AN, 9) of lens side circuit (LEC)
Toku AN,. ), flip-flops (t'F,,) and shift registers (sit,,) are connected to the AND circuit ()\N,1) and (AN
3. ), a flip-flop (FF, )) and a shift register (SR3, SR6).

In addition, a shift register (SR, ) for address data output of the interface circuit (Il') and a shift register (SR, ) for data output of the lens side circuit (LLC) are used.
R, , , ) are timing (TIE, ), (
'1L, ) is loaded into column 11a at the rising edge, and thereafter the data is read in from timing ('T''Bo) to (T''Bo), respectively.
B7), (TLo) to (1″l-77) are sequentially ~γ,
1-1 of each imported data
Output terminal (OlJ) sequentially from qpi/1 to the lowest bit
Output 1 in series to T). A shift register that performs such an operation has a dog-like circuit structure. First, a 1 (a flip-flop that presets the data input to the - column or 1 corresponding to each bit) will be explained in detail.

Then, the output terminal 1 of the flip-flop corresponding to the pin point t is connected to the input terminal of the flip-flop corresponding to the 191-th bit of the bit (J=J). By doing this, each flip-flop 7 block L is synchronized with the clock pulse.
The preset data is sequentially transferred from the lower bits to the upper bits. Further, among the eight flip-flops, the output terminal of the flip-flop that presets the most significant bit of data is connected to the input terminal L of another ninth flip-flop. And this 9
The output terminal f of the th flip-flop is assumed to be the output terminal of the shift register. In this way, the 9th flip-flop takes in the output of the flip-flop whose uppermost 11γ bits of data are preset in synchronization with the clock pulse, and outputs data with a delay of exactly one clock pulse. It looks like this.

When the counter (com2,) becomes "001" at the timing (TB, ) of the (So) step, this counter (
The data of co,2) is taken into the shift register (SR,.) at the timing of (TB,). Then, when (TB, ) to (TF3.) of the next (Sl) step rises, the data 'Of3(110('+(+1t))' of the shift register (Sl'<1°) is , are sequentially sent to the terminal (JB3) of the interface circuit (11.) via the Suinona circuit (SC1), and further,
1/lens side circuit (1, )EC) terminal (Jl, :l)
is input in series. In the lens side circuit (LEC), the switch circuit (SC,) is conductive at this time, so at the timing of the rising edge of the clock pulse (Cr) L), the data is , shift register (S
l-, , , ) are sequentially taken in. The data taken into this shift register (SR, , ) is sent to the address terminals (r6) to (c,) of Ohl (RO) through the data selector (4P3). And this R
From OM (RO), data at the address specified by the input data is output. The outputs (1,, -, A) to (lA) of the shift register (SR,,) are:
It becomes "0000001" at the falling edge of the clock pulse at the timing of (TL,), and the address "00000001" is designated to the ROM (RO). From this ROM (RO), the check data “11100°” stored at the specified address is output.The second check data is the timing of (TL,,) Shift register (SRls)
) will fit into J.

(TL, o) to <T in the next step (S,)
At the timing of Lt), the output terminal ((iL3) of the counter (com,,) becomes "Low", and at the rising edge of the timing of (TL.) to (TL,), the shift 1-
Register (SR.

The data taken into the input terminals (Lb7) to (Lb.) of Circuit (IF) terminal (J
B,) are input in series.

As described above, data is input from the lens side circuit (L to C) to the inter-2 circuit (IF).
In step (S,), the output (CB,) of the counter (CO, o) of the interface circuit (IF) is “L”.
ow" and the switch circuit (SC,) is conductive. Therefore, as mentioned above, the check data "11100" input to the terminal (JB3) is passed through the switch circuit (SC2). At the falling edge of the clock pulse (CP), the clock pulse (CP) is taken into the shift register (SR11).Then, at the falling edge of the clock pulse (CP) at the timing (TB,), the shift register (SR11) is taken into the shift register (SR11).
) becomes “11100”, and furthermore, (TB, )
At the rising edge of the pulse output from the AND circuit (AN, , ) at the timing of , the shift register (SR11)
The data output from is latched by the latch circuit (LA). Then, at the rising edge of the pulse sent from the AND circuit (AN36) at the timing of (TB,),
The data latched by the latch circuit (LA) is input into the register (R(,;1)l).

Also at the step (S,), at the timing of IJro (TB,), the counter (COM,
) L = pulse is input, the counter (CO,,
) becomes “010”. Then, at the timing of (TB2), "0000010" is stored in the shift register (SR,,).
The data of 0) is taken I) 1. Next, in step (S,), the counter (CO1
When the output terminal (CB3) of L) becomes "High", this "High" signal passes through the AND circuit (AN,), is input to the switch (SC,), and the switch circuit (S
C1) is conductive. - G, lens side circuit (■, G'',
C), the output terminal (CL
, ) becomes “High”, this “High” signal is sent to the switch circuit (SC) via the AND circuit (AN, , ).
3), and the switch circuits (SCs) become conductive. 3. Therefore, the address data sent from the shift register SR,o) of the interface circuit (■F) is sent to the terminal (JB,)t via the switch circuit (SC,) as described above. The signal is then input to the terminal (JL, ) of the lens side circuit (LEC), and taken into the shift register (SR, ). In this way, the data stored in the shift register (SR12) is transferred to the ROM (R
It is input to the address terminals (r,) to (ro) of O). Then, (TL7) tie, Nuku standing -F- is l)
llk Toshiji, address “0() in ROM (RO)
Open aperture value Av stored in "Q00U10".

The data is taken into the shift register (SR, 3).

(S4), the terminals (CB) of the counters (CO, , ) of the interface 1-wind circuit (IF) and the counter (CO15) of the lens side circuit (LEC)
The terminals (CL,) of both become "Low", and each "
“Low” signal causes the switch circuit (S,
) and (SC, ) are made conductive. Therefore, in the same manner as described above, from the shift register (SR13) of the lens side circuit (LEC) to the switch circuit (SC,)
, the terminal (JL,), the terminal (JB.) of the interface circuit (IF), and the switch circuit (SC),
Data “00111” is placed in the shift register (SR1,)
This data is latched into the latch circuit (LA) at the timing of (TB). And (TB6
At the timing of ), the pulse l) is input from the ant circuit (AN,'+) to the register (RC;,), and the open aperture value Avo is sent from the latch circuit UJ (LA) to the register (RG,). data is imported.

Similarly, in the base step of (S,), "0
The address data of "0000110" is sent to the lens side (C circuit), and in the step (R6), the data of the maximum aperture value Avo11 is sent to the Honjo side interface circuit (I, Nl; The data of 5,- is taken into the register (RGI) at the timing of (TI3.)?).Furthermore, in the step of (5,),
0 (1 (1100 (1) address data or lens side circuit (L to C)
This data is sent to the input circuit (IF) and is taken into the register (RC,) at the timing (TB,).

At step (S,), the address data of "OU001010" is sent to the lens side circuit (L, to C), and at step (Sl), the maximum focal pressure ≦111
The data of 1't is sent to the interfgoce circuit (II path), and this data is sent to the register (19G,)! at the timing of (T13.). Take this +16° step (S,
, ), the address data of "00001100" is sent to the lens, and in step (S, ,), the longest shooting distance data Dvω is sent to the main body side, and is taken into the register (RG6) at the timing of (TB, ). Twisted. This completes the operation of reading fixed data from the lens side to the camera body side.

(In step S1c, at the falling edge of the clock pulse (CPL) at the timing (TB, ), the shift register (SbW) in the lens side circuit (LEC)
The outputs (La), (LA), and (LA) become “110”, and the AND circuit (AN, 7
) to the flip-flop (FF, ) set terminal (S
) At the rise of the clock pulse (CPL) input to the flip-flop (FF3, ), the terminal (FD) connected to the Q output terminal of this flip-flop (FF3, FD) is “Low”
become. Therefore, the output terminal (CL
,) regardless of the output state of the AND circuit (AN, 6)
A “Low” signal is sent from the inner high terminal, a “High” signal is sent from the output terminal of the OR circuit (ORas), and these “Low” and “High” signals are sent to the switch circuit (SC). , ) and (SC,). Therefore, the switch circuit (sc,) becomes non-conductive, and the switch circuit (SC,) becomes conductive. Therefore, on the lens side, from this point on, the lens side circuit (LEC
) can now be transferred to the camera body.

In steps (S, ,), the data of the longest shooting distance Dvoo is transferred to μ-com (1), and (TB6
), based on the pulse from the AND circuit (AN+1), the maximum shooting distance is set in the register (RG=).
) At the same time as the data of VCsO is taken in, a pulse from the output terminal (ENl) of the AND circuit (AN41) is inputted to the set terminal S of the flip-flop (FF), and the flip-flop (FF) is set. Therefore,
Regardless of the output state of the output terminal (CB, 1) of the counter (C01°), the output of the AND circuit (AN3.) is "Lo".
w”, the output of the O? circuit (0 [shi.) becomes “High”, the inner circuit (SC,) becomes 11 points, and the switch/su circuit (SC2) becomes conductive. From this point forward, data can only be transferred from the lens side to the camera body side.

At the timing of (') in step (8, 2), the counter (C0,
6) calculates the number of pulses input from the AND circuit (AN, 8) by Nf, and 1' in the count is 0, which is "(11").
, the second color/ri (the output "01" of (A) is the data number and is input to the IP address selector), and goes up to the data input part of this data selector (N・1P,). (α1
) is output, and a read address for the ROM (RO) is designated based on this data. Note that the upper 4 bits of the address data specified in this ROM (RO) are stored in the counter (CO).
, ,) indicates "0001" corresponding to the output, and the lower 4
The bit indicates data on the shooting distance from the shooting distance information output device (DS). The data representing the photographing distance Dv is stored in the shift register (SR,) at the timing (TL,).

). Then, at the input step (S, , ), the signal is transferred to the above-mentioned interface circuit (IF) at the falling edge of the clock pulse (CP) at timings (TBa) to (TB4). And this data (D
v) is taken into the shift register (SR1,) of the interface circuit (IF), latched into the touch circuit (LA) at the timing (TB,), and transferred from the register from the AND circuit (AN4.) at the timing (TB6). (RG,
), data on the photographing distance Dv is taken into the register (RG, ).

At the timing of (Tl6), the counter (com, ,
) When one pulse is input, this counter (com,
6) is 10”, and this counter (com, 6) is 10”.
) is input to the data selector (Ml) 3). And from this data selector (MP,),
The data input to the data input section (α2) is sent to the RO (R, O), and based on this data, the ROM
A read address for (RO) is specified. Of this data, the lower four bits indicate the focal length from the focal length information output device (FS). The data representing this focal length [S, as described above, is taken into the shift register (SR, :l) at the timing of J3 times (Tl7) in step (S, ,), and furthermore, this shift register ( SR, Ikara interface circuit (
IF). Then, at the timing of (Tl) in step (St4), the above data (h,) is taken into the latch circuit (La), and furthermore, this data (
r, ) registers (RG,) at the timing of (TB6).
).

At this time, the output (EN, ) of the AND circuit (AN3) is
The signal is input to the set terminal S of the flip-flop (FF, , ), and the flip-flop (FF31) is set.

The "High" signal at the Q output terminal of this flip-flop (FF3.) is input to the input terminal (1) of μ-com (1).
), when the input terminal (L) receives a "High" signal, it is determined that the data regarding the interchangeable lens has been read into the camera body, and the output terminal (O) of the μ-com (1) is It becomes “Low”. Therefore, as mentioned above, the power supply transistor (13T,) in figure f52
is turned off, and power supply to the lens side circuit (LEC) is stopped. This completes the data transfer from the lens side circuit (LEC) to the camera body side interface circuit (■F).

Next, the operation of reading data from the interface circuit (IF) to μ-com (1) via the data bus (DB) will be described.

If the data output to the output terminal (OP3) of μ-com (1) is “6H”, the interface circuit (IF
) output terminal (do) of the decoder (DE1o) is “Hi”.
Therefore, the check data is stored in the register (R
) to the data selector (MP+) and the data bus (D
B) is read into μ-com (1).

Next, when the data output to the output terminal (OP3) of μ-com (1) is “7H”, the decoder (DE10)
The terminal (d,) becomes "High", so the data of the aperture value Avo stored in the register (RG,) is transferred to μ-com (1) via the data bus (1)B). Loaded. Step 1, down, and register (RG)
Data stored in A to (8 in R) Av+n, h, I
t, Dv, and fs are sequentially data bus (D13)
via ζ, 77-com (1). In this way, when the reading of the data of the register bars RG, ) to (RG, ) described above to μ-com+n(1) is completed, the operation is then performed according to the flowchart shown in FIG. 5 described above. .

Note that the circuit in Figure 11.13 is based on the power supply 'A stock (13
It goes without saying that it is also reset by the signal (PR1) from the power-on reset circuit (POt), and it is also reset by the signal (PR1) from the power-on reset circuit (POt). In this embodiment, the aperture value unrelated to the steady-state t level is the aperture value corresponding to the focal length or the set aperture value, but the shooting distance D
The aperture value determined from v and the maximum light emission amount Ivmax of the strobe device, or the aperture value determined from the shooting distance Dv and a predetermined light emission amount Ivmean between the maximum light emission amount 1vmax and the minimum light emission amount Ivmin may be output.

In addition, if the camera is designed to stop down at the minimum aperture when the subject is bright, or if the system does not transmit shooting distance information from the interchangeable lens, it is not possible to determine the interlocking range of the flash device, so for safety, it is necessary to set the maximum aperture. It is also possible to set a value (for example, C8) so that the upper aperture value is not narrowed down.

Effects As described above, according to the present invention, the aperture value Ava for flash photography is calculated based on distance information, etc.
On the smaller aperture side, the aperture is controlled at an aperture value between the two, so the exposure can be made as low as 4°, and the aperture value in the middle can be adjusted relatively freely. By selecting , it is possible to perform flash photography with an exposure amount that takes into account the photographer's intentions and also takes into account the constant light component.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of the present invention, and FIG. The figure is an optical system layout diagram showing the photometric optical system of the camera, and Figure 5 is the second
Flowchart showing the operation of the microfum computer in Figure 6, Figures 6-1 to 8 are graphs showing the relationship between aperture value and exposure time, Figures 9 and 10 are step #36 of Figure 5.
FIG. 11 is a circuit diagram showing an embodiment of the strobe control device (FC) shown in FIG. 2, and FIG.
The figure shows the strobe device <IF'1. ), 1st: (The figure is a circuit diagram showing an example of -=,・Shooting distance signal output means, (SS)...Film sensitivity signal output means, (Also...Aperture 1) value signal output means, (MDO...Maximum light emission amount signal output means, (A1., L) , g...first calculation means, (ALLI
2. Second calculation means, (CMI) .. Comparison means,
(SEL...Selection output means, (FLC...Light emission control circuit, (FTT...Light emission stop signal output means, (APL)
(CA) Aperture control means. Patent applicant: Minolta Camera Co., Ltd. Agent Patent attorney: Soga Aoyama (2) Osaka Kokusai Building, Minolta Camera Co., Ltd., 2-30 Azuchi-cho, Higashi-ku, Osaka @ Inventor Toru Inoue 2-30 Azuchi-cho, Higashi-ku, Osaka Osaka Kokusai Building Minolta Camera Co., Ltd. Inventor Minoru Sekida 2-30 Azuchi-cho, Higashi-ku, Osaka 187- Osaka Kokusai Building Minolta Camera Co., Ltd.

Claims (1)

[Claims] (1) An aperture value array output means that outputs an aperture value for flash photography that is unrelated to the shooting distance during flash photography, a shooting distance signal output means that outputs a change in shooting distance, and the maximum light emission amount of the flash light emitting device. No. 43 from the photographing distance signal output means; a signal from the maximum light emission amount signal output means; and a film sensitivity signal output means for outputting a film sensitivity signal. a first calculation means for calculating an aperture value signal that provides a proper exposure when the flash light emitting device is caused to emit light at the maximum light emission amount based on a signal from the film sensitivity signal output means; a second calculation means for calculating a G representing an intermediate aperture value of the image signal based on the signal from the aperture value signal output means, and the signal from the aperture value signal output means and the first calculation means; and a comparison means for comparing the signal from the first calculation means, and based on the signal from this comparison means, the aperture value (if the signal from the No. 3 output means is on the aperture side than the signal from the first calculation means) If the signal from the second aperture value signal output means is on the smaller aperture side than the signal from the first nine output means, the signal from the second aperture value signal output means is selected and outputted. A photographic diaphragm controlled by an aperture control means including a selection output means for selectively outputting an intermediate aperture value signal from the calculation means, and an aperture control means for controlling the aperture of the photographic aperture based on the signal from the selection output means. light emission stop No. 48 output means for measuring the reflected light from the subject due to the flash light emission passing through the aperture and outputting a signal for stopping the flash light emission when the integrated amount of this reflected light reaches a predetermined value. A flash photography device characterized by: