JPH07120815A - Flash photographing system - Google Patents

Abstract

PURPOSE:To make it possible to easily check shading by flash light on an actual photographic image screen in ordinary flash photographing. CONSTITUTION:This flash photographing system is composed of a camera 600 capable of transmitting a light emission control signal by flash of a built-in flash 601 and a flash device 100 capable of receiving the light emission control signal by receiving the flash by a signal receiving section 101. The flash device 100 has a test light emission mode for checking the shading of a subject by the flash and the camera 600 has an operating switch SW indicting the test light emission by the test light emission mode. A test light emission request signal is transmitted from the camera 600 by operation of the operating switch SW. The test light emission request signal is received by the flash device 100 to execute the test light emission in accordance with the preset light emission conditions of the test light emission mode. A photographer is thus able to remotely control the test light emission of the flash device 100 while viewing a finder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash photographing system including a camera and a flash device which can be remotely controlled by a radio signal transmitted from the camera.

[0002]

2. Description of the Related Art For example, when a flash device mounted on a camera body emits light to photograph a subject with a wall in the room as a back, unnecessary shadows on the wall behind the subject due to flash light are taken. May occur and impair the image quality of the photograph.

Conventionally, for example, a flash device which can be remotely operated by a control signal transmitted from the camera body by a flash light of a built-in flash has been commercialized. By combining such a flash device and a camera, a flash photographing system having less of the above-mentioned problems can be obtained. It is configurable. In this flash photographing system, since the flash device can be separated from the camera body, it is possible to improve the conditions under which the subject is exposed to flash light by setting the flash device at a position where no shadow is produced on the wall or the like.

However, even in the above flash photographing system, since the actual shadow produced by the flash light can be confirmed only in the print after the photographing, the flash photographing is related to setting the irradiation direction of the flash light suitable for the photographing condition of the subject. It requires a relatively high level of knowledge and experience, and some users may not be able to fully utilize the above functions.

Therefore, in recent years, a flash device has been proposed and commercialized, which makes it possible to check a subject and a shadow behind the subject due to flash light before photographing. This flash device is equipped with a special test light emission mode (hereinafter referred to as modeling mode) for confirming the above-mentioned shadow in addition to the normal test light emission mode for confirming the light emission of the flash, and is provided in the main body of the device. By operating the test flash switch, test flash in modeling mode is possible. In the modeling mode, the flash flashes at a frequency of about 20 Hz (hereinafter referred to as "multi-flash"), and when applied to macro photography of flowers and the like, it is possible to confirm the fine shadows on petals and leaves. .

[0006]

Since the conventional flash photographing system does not have the test light emission function in the modeling mode, it is difficult to check the shadows formed on the subject and behind the subject by the flash light before photographing.

It is possible to apply a flash device having the above modeling mode to the above flash photographing system. However, the light emitting condition in the conventional modeling mode is for macro photography, and this light emitting condition is compared with a snap photograph or the like. Even if it is applied to ordinary flash photography for photographing a subject located at a distant distance, it is difficult to effectively confirm the shadow by the flash light. Moreover, since the test flash switch is provided in the flash device, the test flash in the modeling mode cannot be fired while looking through the viewfinder of the camera, and it is difficult to confirm the shadow of the flash light on the actual shooting screen. .

The present invention has been made in view of the above problems, and an object of the present invention is to provide a flash photographing system which can easily confirm a shadow due to a flash light on an actual photographing screen in ordinary flash photographing. .

[0009]

SUMMARY OF THE INVENTION The present invention provides a flash photography system comprising a camera and a flash device which can be remotely controlled by a wireless signal transmitted from the camera, wherein the camera has a built-in flash generation means. And a test light emission instructing means for instructing a test light emission for confirming the shadow generated on the subject by the flash light from the flash device, and a test light emission by the flash light of the built-in flash light generating means in response to the operation of the test light emission instructing means. The upper flash device includes a transmission control means for transmitting a request signal, the upper flash device generates a flash light, a receiving means for receiving the flash light and receiving the test light emission request signal, and a test light emission by the receiving means. When the request signal is received, the flash light is emitted according to the predetermined light emission condition for shadow confirmation by the preset flash light emission. The light emission control for test firing the raw device is obtained and means.

[0010]

According to the present invention, when the test light emission instructing means of the camera is operated, a predetermined test light emission request signal is generated in response to this operation, and the test light emission request signal is supplied to the internal flash generation stage. It is transmitted to the flash device by a flash. When the flash device receives the light emission by the built-in flash generation means and receives the test light emission request signal from the light emission, the flash device emits test light according to a predetermined light emission condition for confirming a shadow produced on the subject by the flash light emission. For example, the light quantity of the guide number GN = 5.6 per time, and the multi-light emission is performed three times at the light emission frequency of 2 Hz, and the subject is irradiated with the flash light. Therefore, in ordinary flash photography such as snapshots, by operating the test flash instruction means while looking through the viewfinder of the camera, it is possible to confirm the direction and size of the shadow produced on the subject by the flash light on the actual photography screen. It will be possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic configuration diagram showing the configuration of a flash photographing system according to the present invention.

The flash photographing system includes a built-in flash 601. The camera body 600 capable of transmitting a light emission control signal of the flash device 100 by the flash light of the built-in flash 602, and the flash light from the built-in flash 601 are received to receive the flash light. The flash unit 100 includes a receiving unit 101 that receives a light emission control signal, and performs flash light emission based on the light emission control signal.

The flash unit 100 has two types of modeling modes, as will be described later, and is preset when the receiving unit 101 receives a test light emission request signal transmitted by the flash of the built-in flash 601 from the camera body 600. The flash circuit 102 is designed to emit a test light according to the light emission conditions of the modeling mode.

On the other hand, the camera body 600 has an operation switch SW for instructing the test light emission in the mode ring mode, and the test light emission request signal is transmitted by the flash of the built-in flash 601 according to the operation of the operation switch SW. It has become so. Therefore, even when the flash unit 100 is separated from the camera body 600, it is possible to remotely control the test light emission from the camera body 600 in the modeling mode, thereby checking the shadow of the flash light on the actual shooting screen while looking through the viewfinder. Is able to.

FIG. 3 is a front view of a flash device applied to the flash photographing system according to the present invention, and FIG. 4 is a rear view of the flash device.

The flash unit 100 comprises a light emitting section 200 and a light emission control section 300. Light emitting unit 200
Is provided above the light emission control unit 300 and has a light emission window 201 on the front surface. Has on the back. Luminous window 20
1, a condenser lens 203 composed of a Fresnel lens is attached, and a xenon discharge tube which is a light emitting source is provided at the back of the condenser lens 203.

The light emission control section 300 is provided with a light receiving section 301 for receiving flash light emitted from the built-in flash of the camera body and a battery storage chamber 305 on the front side, and a display section consisting of an LCD (Liquid Crystal Display) on the back side. Thirty
2 and an operation unit 303 are provided, and an attachment unit 304 for attaching to the camera body is provided on the lower surface. Mounting part 3
On 04, four contact pins P1 to P4 for connecting a communication line with the camera body are provided in a protruding manner.

The display unit 302 is the flash unit 10.
It displays various kinds of information related to the 0 function and has the display contents shown in FIG.

In the figure, the display DA1 is a power supply display of the flash unit 100, and when the power is turned on, "O" is displayed.
"N" is displayed. The display DA2 shows the setting state of the light emission mode. The flash device 100 is
When the flash mode is set to the multi mode, the flash mode has two kinds of flash modes, that is, a multi mode that flashes multiple times, and a single mode that flashes flash only once.
“MULTI” is displayed. Details of the light emission mode will be described later.

Further, the display DA3 shows the setting state of the light emission control. The flash unit 100 has a wireless mode which is remotely controlled by flash light of a built-in flash of a camera and a normal (non-wireless) mode which is controlled by serial communication through a communication line connected through the contact pins P1 to P4. If you have different types of light emission control and wireless mode is set,
"ESS" is displayed. Details of the light emission control will be described later.

The display DA4 displays the setting of the modeling mode, the light emission frequency, the light emission amount, and the like.
The modeling mode is a mode in which test flash light is emitted in order to confirm the direction and size of the shadow that is generated on the subject and behind the subject by the flash light. Flash device 10
0 has two types of modeling modes, a portrait mode and a macro mode, and the light emission purpose, light emission condition, and light emission content in both modes are as shown in Table 1.

When the portrait mode is set, three emission arrows and "MODEL" are displayed,
When the macro mode is set, three emission arrows and "MO
"DEL" is displayed. Further, in the above-mentioned multi-mode or modeling mode, the flash is designed to emit multiple flashes periodically, and when this emission frequency is set, the set value is also displayed on the display DA4. The amount of light emission is converted to the irradiation distance (m) of the flash light and displayed.

[0023]

[Table 1]

Further, the display DA5 displays the zoom position and the number of times of light emission. The flash device 100 is
It has a zoom function that can change the reaching distance of the flash light, and can set a plurality of zoom positions as described later. Zooming of the flash light is performed, for example, by providing a reflecting umbrella on the back surface of the xenon discharge tube so as to be movable toward and away from the xenon discharge tube, and changing the position of the reflecting umbrella.

When the zoom position is set, the zoom position set in the display DA5 is displayed as the focal length (mm) of the corresponding lens. In addition, when the number N of times of light emission is set in the multimode or modeling mode, “R
"ESP" is displayed and the set value N is displayed.

6 to 11 are views showing examples of displays on the display unit 302. FIG. 6 is a display example in normal use, and is a display example when the normal mode is set as the light emission control mode and the single mode is set as the light emission mode. In this case, the display unit 302 displays the light emission amount and the zoom position. The figure shows the case where the zoom position is set to 50 mm.

FIG. 7 is a display example when the wireless mode is set as the light emission control mode, the portrait mode is set as the modeling mode, and the zoom position is set to 24 mm. "W
"IRELESS", "CH-1" as a channel display for wireless emission, and three emission arrows and "MODEL" as a display in portrait mode. Further, "24 mm" is displayed as the display of the zoom position.

FIG. 8 shows the case where the modeling mode is changed from the portrait mode to the macro mode in the display state of FIG. 7, and the display of three light emitting arrows is changed to the display of five light emitting arrows. ing.

FIG. 9 shows a display example when the multi-mode is set as the light emission mode. “MULTI” is displayed as the display of the light emission mode, and the light emission frequency “30 Hz”, the shooting distance “5.0 m”, and the number of times of light emission “RESP 10” are displayed as the display of the light emission conditions.

FIG. 10 shows a case where the number of times of light emission is changed from the display state of FIG. 9 to "2 times", and "RESP" is set.
The display of "10" has been changed to the display of "RESP 2".

FIG. 11 shows the case where the display of the number of times of light emission is changed from the display state of FIG. 9 to the display of the zoom position.
The display of "RESP 10" has been changed to the display of "50 mm".

Returning to FIG. 4, the operation unit 303 is composed of eight switches S1 to S8 and a power switch S0. The power switch S0 is a slide switch,
If you slide it to the "ON" side, the flash unit 100
The main power of is turned on.

The switch S1 is a switch for switching and setting the light emission amount of the flash. Each time you press switch S1,
Flash output is "1"-"1/2"-"1/4"-"1 /"
It can be switched cyclically in the order of 8 ”-“ 1/16 ”-“ 1/32 ”.

The switch S2 is a switch for switching and setting the modeling mode. Each time the switch S2 is pressed, the modeling mode is cyclically switched in the order of "OFF"-"portrait mode"-"macro mode".

The switch S3 is a switch for switching and setting the light emission control mode. Each time you press switch S3,
The "wireless mode" and the "normal mode" are switched alternately.

The switch S4 is a test light emission switch. When the switch S4 is pressed after the charging is completed, the test flash is emitted.

The switch S5 is a switch for switching and setting the light emission mode. Each time the switch S5 is pressed, the "multi mode" and the "single mode" are switched alternately.

The switch S6 is a switch for switching and setting the light emission frequency. Each time the switch S6 is pressed, the flash emission frequency changes from "100Hz" to "50Hz" to "30H".
It is switched cyclically in the order of "z"-"10 Hz".

The switch S7 is a switch for switching and setting the number of times of light emission. Each time the switch S7 is pressed, the flash emission frequency is cyclically switched in the order of "10 times"-"5 times"-"2 times".

The switch S8 is a switch for switching and setting the zoom position. Every time the switch S8 is pressed, the zoom position of the flash is "70mm"-"50mm"-"35mm".
-It is switched cyclically in the order of "28mm"-"24mm".

When the power is turned on, various setting values of modes and light emission conditions corresponding to the switches S1 to S8 (excluding the switch S4) are as follows: light emission amount = “1”, modeling mode = “OFF”, light emission control Mode = “normal”, light emission mode = “single”, light emission frequency = “10”
0Hz ", number of issues =" 10 "and zoom position =" 70 "
mm "is initially set.

12A and 12B are external views of the camera body applied to the flash photographing system. FIG. 12A is a perspective view seen from the front side, and FIG. 12B is a perspective view seen from the back side.

A lens mounting portion 602 to which an interchangeable lens is mounted is provided substantially in the center of the front surface of the camera body 600, and a built-in flash 601 is provided above the lens mounting portion 602. When the pull-up button 601A is pressed, the built-in flash 601 rises from the inside of the camera body to expose a light emitting portion (not shown).

The camera body 600 is composed of the camera body 60.
Remote control of the flash device 100 separated from 0 is possible, and the control signal is transmitted to the flash device 100 by using the flash light of the built-in flash 601. For example, a plurality of types of control signals are transmitted from the camera body 600 to the flash device 100 using flash light by changing the number of times of light emission and the light emission cycle of the built-in flash 601 according to the type of control signal.

In the wireless mode, the operation timing of various operation buttons such as the release button 604 and the spot metering button 605 is transmitted from the camera body 600 to the flash unit 100 by causing the built-in flash 601 to emit light. The spot metering button 60
Reference numeral 5 denotes an operation button in which the functions of spot metering and test flash in the modeling mode are multiplexed. When operated in flash photography in the wireless mode, a test flash request signal is transmitted from the flash light to the flash device 100. .

An accessory shoe 603 to which the flash unit 100 is attached is provided at a position behind the built-in flash 601. Accessory shoe 60
3 is provided with four terminal plates (not shown) with which the four contact pins P1 to P4 projecting from the mounting portion 304 of the flash device 100 come into contact with each other.
When the flash unit 100 is mounted on the camera body, a communication line is connected via the contact pins P1 to P4, and various information regarding flash emission is serially communicated via the communication line. In normal mode,
The light emission control signal is transmitted to the flash device 100 by the serial communication.

FIG. 2 is a circuit configuration diagram of a flash device applied to the flash photographing system according to the present invention.
In the figure, the flash circuit 400 includes the light emitting unit 2
00, and the flash control circuit 500 is provided in the light emission control unit 300.

The flash circuit 400 includes a xenon discharge tube 401 which is a light emitting source, a light emission control circuit 402 which controls light emission of the xenon discharge tube 401, and the xenon discharge tube 40.
1, a main capacitor CM that supplies discharge energy to
It is composed of a voltage detection circuit 403 that detects the voltage of the main capacitor CM, a DC-DC converter 404 that generates the charging voltage of the main capacitor CM, and a power supply battery E.

The main capacitor CM is the DC-
A rectifying diode D is provided at the output end of the DC converter 404.
And is charged via the DC-DC converter 404 at a predetermined high voltage.

The voltage detecting circuit 403, which is composed of a resistor R1 and a resistor R2 connected in series, is connected in parallel to the main capacitor CM, and the voltage Vc of the main capacitor CM is a divided voltage Vc '(= R2.Vc / (R1 + R2)). Detected as. The light emission control circuit 402, the xenon discharge tube 401, and the IGBT are connected to the main capacitor CM.
A series circuit of switching transistors Q each including an (Insulated Gate Bipolar Transistor) is connected in parallel, and the accumulated charge of the main capacitor CM is discharged to the xenon discharge tube 401, so that the xenon discharge tube 401 emits light.

The trigger terminal of the xenon discharge tube 401 and the base of the switching transistor Q are respectively the control terminal T1 and the control terminal T2 of the light emission control circuit 402.
The emission control circuit 402 controls the emission operation of the xenon discharge tube 401. Light emission control circuit 40
2 is a xenon discharge tube 4 based on light emission conditions such as the amount of light emission, the number of light emission times, and the light emission frequency input from the CPU 505
The output of the trigger signal to 01 and the ON / OFF drive of the switching transistor Q are controlled to cause the xenon discharge tube 401 to emit light according to a predetermined light emission condition.

For example, in the test light emission in the single mode, the switching transistor Q
Is turned on and the high voltage Vc of the main capacitor CM is applied to the xenon discharge tube 401, and then a trigger signal is sent only once at a predetermined light emission timing to cause the xenon discharge tube 401 to emit light once. In the macro mode of the modeling mode, a pulse train signal having a frequency of 40 Hz is sent to the xenon discharge tube 401 as a trigger signal for 4 seconds to cause the xenon discharge tube 401 to emit multiple lights 160 times.

The flash control circuit 500 includes a light receiving circuit 501 which constitutes the light receiving section 301, a zoom circuit 502 which controls a zoom operation of the light emitting section 201, and the display section 3.
02, an LCD display 503, a key matrix circuit 504 that constitutes the operation unit 303, and a CPU 505 that centrally controls the drive of the flash unit 100.

The light receiving circuit 501 includes a light receiving element 501A.
And the light receiving signal of the light receiving element 501A from the camera body 600
And a receiving circuit 501B that receives the information transmitted from.

The receiving circuit 501B includes the light receiving element 5
The waveform of the light received by 01A is adjusted and output to the CPU 505. The information received by the receiving circuit 501B is input to the WL terminal of the CPU 505, and the CPU
It is used for light emission control of 505. For example, the light receiving element 501
When the flash light is received by A, the receiving circuit 501
A low level pulse is output from B to the WL terminal of the CPU 505. The CPU 505 shifts to interrupt control by this pulse, and performs light emission control based on the transmission information from the camera body 600.

The zoom circuit 502 controls the drive of a reflector (not shown) of the xenon discharge tube 401, and a drive motor 502A for driving the reflector and a motor drive circuit for controlling the drive of the drive motor 502A. And 502B. The motor drive circuit 502B is a CP
Based on the information on the zoom position output from the ZOOM terminal of U505, the drive motor 502A is driven by a predetermined amount to set the reflector to the instructed zoom position.

The LCD display 503 has the plurality of displays DA1 to DA5, and the LCD of the CPU 505.
A predetermined display is turned on based on the display information output from the output terminal.

The key matrix 504 has the power switch S0 and switches S1 to S8, and a switch operation signal is input to the KEYW terminal of the CPU 505.

The CPU 505 uses the "WL", "ZOO"
"M", "LCD output" and "KEY" terminals, as well as "O"
It is provided with respective control terminals of "SC", "READY" and "TRIG" and connection terminals of "SCK", "SI / SO", "X" and "GND" with the camera body. The SCK terminal, SI / SO terminal, X terminal and GND terminal are contact pins P1, P2, P provided on the mounting portion 304.
3 and P4, respectively.

The OSC terminal is a control terminal for controlling the boosting operation of the DC-DC converter 404. "RE
“ADY” is a control terminal for monitoring the charge state of the main capacitor CM, and the voltage of the main capacitor CM detected by the voltage detection circuit 403 is input to the READY terminal. CPU505 is the main capacitor CM
When the voltage of 2 becomes equal to or lower than a predetermined voltage value, a boosting control signal is output from the OSC terminal to start charging.

The TRIG terminal is used for the xenon discharge tube 40.
1 is a control terminal for controlling light emission, and a control signal is output from the TRIG terminal to the light emission control circuit 402 at a light emission timing according to light emission conditions such as the amount of light emission, the number of times of light emission, and the light emission frequency.

The SCK terminal is an input terminal for a control signal and a clock for serial communication between the CPU 505 and the CPU in the camera body. SI / SO terminal is CPU50
5 is an input / output terminal for data exchanged between the CPU 5 and the CPU in the camera body. The X terminal is an input terminal for the timing signal of the X contact sent from the camera body 600, and
The terminal is a ground terminal.

Next, the light emission control operation of the flash device will be described with reference to the flow charts of FIGS.

FIG. 13 is a flowchart of the main flow. This flow is applied to both normal mode and wireless mode.

When the power switch S0 is turned on and the flash unit 100 is activated, various modes and light emission conditions corresponding to the switches S1 to S8 are initialized (# 1). Subsequently, it is determined whether or not charging is required by whether or not the voltage Vc of the main capacitor CM detected by the voltage detection circuit 403 exceeds a predetermined value (# 2). If the voltage Vc is less than or equal to the predetermined value, the CPU 505 To DC-D
A charge control signal is sent to the C converter 404 to start charging the main capacitor CM. When the voltage Vc exceeds the predetermined value, it is determined that the charging is completed, and the charging control of the DC-DC converter 404 is stopped (# 3).

Then, after the reflector of the xenon discharge tube 401 is set to the initial zoom position (# 5), the switch S is pressed.
1 to S3, S5 to S8, a predetermined mode and a light emission condition are set according to the input, and a predetermined display process corresponding to the set process is performed (# 6) to operate the switch S4. Accordingly, the test light emission process is performed (# 7).

While the power switch S0 is on, the processes of # 1 to # 7 are executed (loop of # 1 to # 8), and when the power switch S0 is turned off (YE in # 8).
S), the light emission control operation ends.

FIG. 14 is a flow chart of an interrupt process when an interrupt signal such as main light emission or test light emission is input.

When the main flow of FIG. 13 is being executed, in the wireless mode, an interrupt process is performed by the received light signal of the flash light from the receiving circuit 502, and in the normal mode, by the communication signal with the camera body 600. Is performed.

In FIG. 14, # 10 to # 14 represent interrupt processing in the wireless mode, and # 15 to # 20.
Indicates an interrupt process in the normal mode.

When the interrupt processing is started, whether the interrupt request is due to a signal input from the light receiving circuit 501 to the WL terminal of the CPU 505 or serial communication between the flash unit 100 and the camera body 600. Is determined (# 10).

Upon receiving the flash light, the light receiving circuit 501 sends out an L level pulse as an interrupt signal to the WL terminal of the CPU 505. Further, when the flash device 100 is attached to the camera body 600, the contact pins P1 to P of the attachment portion 304 are attached.
Serial communication is performed between the flash device 100 and the camera body 600 via the communication device 4, and an interrupt request is generated from the camera body 600 to the flash device 100 by this serial communication.

The interrupt request is sent to the L terminal which is input to the WL terminal.
If it is due to level pulse (YE in # 10
S) Further, it is determined whether or not the flash light received by the light receiving circuit 501 is emitted from the camera body 600 (# 11). This determination is made based on whether or not the light emission cycle or the number of times of flash light emission has a preset cycle or number of times.

If the flash light is not emitted from the camera body 600 (NO in # 11), it is regarded as noise and returns. If the flash light is emitted from the camera body 600 (# 11) YES), it is determined whether or not the information transmitted by this flash light is for instructing test light emission (# 12).

If the transmission information indicates the test emission (YES in # 12), the test flag TF is set to "1" and the process returns (# 13), and the transmission information indicates the test emission. If not (# 12 N
O), that is, if it is an instruction for main light emission, a predetermined release process is performed (# 14). In this release process, the xenon discharge tube 401 is main-emitted based on the X contact timing signal transmitted from the camera body 600.

If the interrupt request is based on serial communication at # 10 (NO at # 10), at # 15 to # 17,
The request contents are transferred from the camera body 600 to the flash unit 1.
00, a communication request from the flash unit 100 to the camera body 600, or a release instruction.

If the interrupt request content is a communication request from the camera body 600 to the flash unit 100 (Y in # 15).
ES), the camera body 6 according to the flowchart of FIG.
The data transmitted from 00 is read (#
18). That is, it is determined whether or not the spot photometry button 605 of the camera body 600 is operated and the test light emission request in the modeling mode is made (# 30). If the test light emission request is made (YES in # 30), the test is made. After the flag TF is set to "1"(# 31), the data is read (# 32), and if the test light emission request in the modeling mode is not made (N in # 30,
O), the data is read without setting the test flag TF (# 32).

Also, the content of the interrupt request is the flash device 1
If the communication request is from 00 to the camera body 600 (# 1
6 YES), the flash unit 100 to the camera body 6
Predetermined data is transmitted to 00 (# 19), and if it is a release operation (YES in # 17), a predetermined release process is performed (# 14). In this release process, a timing signal of the X contact input from the camera body 600 to the X terminal via the contact pin P3, for example, H
The xenon discharge tube 401 emits the main light in synchronization with the inversion timing of the level inversion signal inverted from the level to the L level.

FIG. 16 shows the switch S in # 5.
6 is a flowchart of a setting process when the multi mode is set by 5.

In # 7, when the switches of the operation unit 303 are operated, it is determined whether or not a plurality of switches are simultaneously operated (# 40). If a plurality of switches are simultaneously operated, an operation error occurs. Then, the process returns to # 6 and the display content on the display unit 302 is held at the current display content. If any switch is operated normally (NO in # 40), the setting state of the light emission mode is determined (# 41), and if the light emission mode is set to the normal mode (NO in # 41), The content corresponding to the operated switch is changed to the value set by the switch (# 42, # 43), and the process returns to # 6 and the display unit 302
The display content of is changed to the above changed value.

If the light emission mode is set to the multi mode (YES in # 41), it is determined whether or not the operated switch is the switch S7 (light emission number setting key) (# 42), and the switch S7 is turned on. If it is operated (# 42
If YES, the process proceeds to # 43 to # 46, and the display content on the display unit 302 is changed to the number of times of light emission set by the switch S7.

That is, the display DA of the current display unit 302
If the display in 5 is the display of the number of flashes (Y in # 43
ES), the set value of the number of times of light emission is changed to the set value after the change (# 44), and the changed value of the number of times of light emission is displayed in the display RAM.
(# 45), which causes the display unit 30 to be rewritten.
The display DA5 of 2 is changed to the new set value.

On the other hand, if the current display DA5 of the display unit 302 is the zoom position display (N in # 43).
O), the set value of the number of times of light emission is written in the display RAM (#
46), whereby the display content of the display DA5 of the display unit 302 is changed to the set value of the number of times of light emission.

The switch operated in # 42 is the switch S.
If it is not 7 (NO in # 42), it is determined whether or not the operated switch is the switch S8 (zoom position setting key) (# 47), and if the switch S8 is operated (YES in # 47). ), # 48 to # 51, and the display content on the display unit 302 is changed to the zoom position set by the switch S8.

That is, the display DA of the current display unit 302
If the display in 5 is the zoom position display (YES in # 48), the set value of the zoom position is changed to the changed set value (# 49), and the changed value of the zoom position is rewritten in the display RAM. (# 50), whereby the zoom position display of the display DA5 on the display unit 302 is changed to the new set value.

On the other hand, if the current display on the display DA5 of the display unit 302 is the display of the number of times of light emission (N at # 48).
O), the set value of the zoom position is written in the display RAM (# 51), whereby the display DA5 of the display unit 302 is displayed.
The display content of is changed to the set value of the zoom position.

The switch operated in # 47 is the switch S.
If it is not 8 (NO in # 47), the process proceeds to # 52 and # 53, the content corresponding to the operated switch is changed to the value set by the switch (# 52, # 53), and the display unit 302 The display content of is changed according to the change value.

17 and 18 are flowcharts of the light emission control operation when the test light emission is instructed.

At # 7, the switch S4 is operated to instruct the test flash, or # 13 (FIG. 14, FIG.
If the test flag TF is set to "1" according to the reference), the setting states of the light emission mode and the modeling mode are determined in # 60 to # 62, and the processing corresponding to the setting state of each mode is performed in # 63 to # 73. Is performed.

When the light emission mode is set to the multi mode (YES in # 60), the modeling mode is reset to the OFF state (# 63) and the switches S1, S6, S
The light emission conditions such as the light emission amount, the light emission frequency, and the number of times of light emission selected by the operation of 7 are sequentially set (# 64, # 65,
# 66).

When the light emission mode is set to the single mode and the modeling mode is reset to the OFF state (NO in # 60 and # 61), that is, in the normal test light emission, the switch S1 is operated. The light emission condition of the selected light emission amount is set (# 67).

If the light emission mode is set to the single mode and the modeling mode is set to the portrait mode (NO in # 60, YE in # 61 and # 62).
S), light emission conditions such as light emission amount, light emission frequency, and number of times of light emission in preset portrait mode (see Table 1)
Are sequentially set (# 68, # 69, # 70), the light emission mode is set to the single mode, and the modeling mode is set to the macro mode (NO in # 60, # 6).
(YES in 1 and NO in # 62), the light emission amount in the preset macro mode, the light emission frequency f (Hz), and the light emission number N (times) (see Table 1) are sequentially set (#). 71, # 72, # 73).

Then, the light emission is started according to the set light emission conditions, the test flag TF is reset to "0"(# 74), and the flash device 100 emits light indicating that the camera body 600 is emitting light. The medium signal is transmitted (# 75). The light emitting signal is a signal output from the SI / SO terminal, and is, for example, an H level state identifying signal during non-light emitting and L level during light emitting. Therefore,
In # 75, the state identification signal is inverted from H level to L level. In the multi-mode, when the first light emission is completed after the light emission is started, the second, third, ... Emissions are continuously repeated.

Subsequently, the counting of the set number of times of light emission and the set emission frequency f is started (# 76), and when the counting of the predetermined number of times and frequency is completed (YES in # 77), the test emission is stopped (# 78). ), The state identification signal is L
The level is inverted to the H level and the emission of the light emitting signal is stopped (# 79).

[0095]

According to the present invention, in a flash photographing system comprising a camera and a flash device which can be remotely controlled by a radio signal transmitted from the camera, a shadow produced on a subject by a flash of light from the flash device on the camera. Is provided with a test emission instruction means for confirming
In response to the operation of the test flash instruction means, the test flash request signal is transmitted by the flash of the built-in flash, and the flash device receives the flash light of the built-in flash and receives the test flash request signal. When the test light emission request signal is received by the receiving means, the test light emission of the flash is performed according to the predetermined light emission condition for shadow confirmation by the preset flash light emission. It is possible to remotely control the test flash for checking shadows by flashing the device, and in the actual shooting screen,
It is possible to easily confirm the shadow generated on the subject by the flash light.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a flash photography system according to the present invention.

FIG. 2 is a circuit configuration diagram of a flash device applied to a flash photographing system according to the present invention.

FIG. 3 is a front view of a flash device applied to the flash photographing system according to the present invention.

FIG. 4 is a rear view of a flash device applied to the flash photographing system according to the present invention.

FIG. 5 is a diagram showing display contents on a display unit.

FIG. 6 is a diagram showing a display example when a normal light emission mode is set.

FIG. 7 is a diagram showing a display example when a wireless mode and a portrait mode are set as a modeling mode.

FIG. 8 is a diagram showing a display example when the modeling mode is switched from the portrait mode to the macro mode in FIG.

FIG. 9 is a diagram showing a display example when a multi-mode is set as a light emission mode.

10 is a diagram showing a display example when the number of times of light emission is changed in the display state of FIG.

FIG. 11 is a diagram showing an example of a table when the display of the number of times of light emission is changed to the display of the zoom position in the display state of FIG. 9.

12A and 12B are schematic diagrams of a camera body applied to the flash photographing system according to the present invention, in which FIG. 12A is a front perspective view and FIG. 12B is a rear perspective view.

FIG. 13 is a flowchart of a main flow of a light emission control operation of the flash device applied to the flash photography system according to the present invention.

FIG. 14 is a flowchart of interrupt processing.

FIG. 15 is a flowchart of a subroutine of “READ processing”.

FIG. 16 is a flowchart of a setting process when the multi mode is set.

FIG. 17 is a flowchart of a light emission control operation when a test light emission is instructed.

FIG. 18 is a flowchart of a light emission control operation when a test light emission is instructed.

[Explanation of symbols]

 100 Flash Device 101 Receiving Section 102 Flash Circuit 200 Light Emitting Section 201 Light Emitting Window 203 Condensing Lens 300 Light Emission Control Section 301 Light Receiving Section 302 Display Section 303 Operating Section 304 Mounting Section 305 Battery Storage Room 400 Light Emitting Circuit 401 Xenon Discharge Tube 402 Light Emission Control Circuit 403 Voltage detection circuit 404 DC-DC converter 500 Flash control circuit 600 Camera body 601 Built-in flash 605 Spot metering button (test emission instruction button) SW operation switch

Claims (1)

[Claims] 1. A flash photographing system comprising a camera and a flash device which can be remotely controlled by a radio signal transmitted from the camera, wherein the camera comprises a built-in flash generating means for generating a flash, and a flash from the flash device. A test light emission instructing means for instructing a test light emission for confirming the shadow produced on the subject by the above, and a transmission control means for transmitting a test light emission request signal by the flash of the built-in flash generating means in response to the operation And the upper flash device, a flash light generation means for generating a flash light, a receiving means for receiving the test light emission request signal by receiving the flash light, when the test light emission request signal is received by the receiving means, Test light emission of the flash light generation means according to a predetermined light emission condition for shadow confirmation by flash light emission set in advance A flash photography system, characterized in that it comprises means for controlling light emission.