JP5963434B2 - Camera system, imaging device, and illumination device - Google Patents

Description

  The present invention relates to a camera system in which an imaging device and a lighting device are connected by a plurality of connection terminals.

  2. Description of the Related Art Conventionally, an imaging device such as a camera can be connected to various peripheral devices, and a technique for confirming a connection state between the imaging device and a peripheral device connected to the imaging device has been proposed. For example, in Patent Document 1, information communication is attempted between an imaging device and a peripheral device via a connection terminal portion for information communication, and the connection terminal portion for information communication is normally connected based on the result of the attempt. A technique for confirming whether or not the image is present is disclosed.

  Further, in Patent Document 2, in order to detect a contact failure of an X signal terminal that transmits a synchro signal (hereinafter referred to as an X signal) that is a light emission start signal between an imaging device and a flash device attached to the imaging device. The technology is disclosed. In this technique, an X signal is transmitted from the imaging device to the flash device via the X signal terminal before shooting, and the detection result of the X signal is transmitted to the imaging device using a communication terminal other than the X signal terminal. Transmitting and detecting whether or not the X signal terminal is normally connected.

JP 2000-89328 A JP 2005-283636 A

  However, in the techniques disclosed in Patent Document 1 and Patent Document 2, the connection state of the predetermined connection terminal can be confirmed, but if the predetermined connection terminal is poorly connected, the connection is executed via the connection terminal. The function cannot be performed. For example, in the technique disclosed in Patent Document 2, it is possible to detect whether or not the X signal terminal is normally connected, but if the X signal terminal is poorly connected, the X signal cannot be transmitted. The flash device cannot emit light.

  In addition, in the case of an imaging device that does not send an instruction to the flash device if it does not receive information indicating that the flash device can emit light, the connection terminal that indicates that the flash device is ready to emit light is poorly connected. Then, even if the flash device can emit light, the flash device cannot emit light.

  Therefore, the present invention makes it possible to cause the illuminating device to perform main light emission according to an instruction from the imaging device even if the connection terminal for performing the main light emission operation between the imaging device and the illuminating device is poorly connected. For the purpose.

In order to achieve the above object, a camera system according to the present invention is a camera system that includes an imaging device and an illumination device that can be connected to the imaging device, and includes a plurality of devices that connect the imaging device and the illumination device. and connection terminals, of the plurality of connecting terminals, and discriminating means for discriminating the connection status of the first connection terminal for communicating a signal to the light conditions of the lighting device, wherein the said determination means first If the communication over the first connection terminal is judged not successful, the same serving signal and signal for emitting light to the illumination device to be communicated via the first connecting terminal And control means for communicating via a second connection terminal different from the first connection terminal among the plurality of connection terminals.

In order to achieve the above object, an imaging apparatus according to the present invention includes a plurality of connection terminals connected to the lighting device, among the plurality of connecting terminals, a signal for the illumination device emitting light Determining means for determining a connection state of a first connection terminal for communication; and when the determination means determines that communication via the first connection terminal is not normally performed, the first connection similar roles signal and a signal for causing the illumination device to be communicated via the terminal is emitting light, in said plurality of connecting terminals, a second connection terminal that is different from the first connection terminal And a control means for communicating with each other.

In order to achieve the above object, the lighting apparatus according to the present invention includes: a light emitting means, a plurality of connection terminals to be connected to the imaging device, among the plurality of connecting terminals, the light emission from the light emitting means If communication signals through a first connection terminal for communicating to do is not successful, a signal for performing light emission from the light emitting means which is communicated via the first connecting terminal and similar serving signal, among the plurality of connecting terminals, and a control means for emitting light to said light emitting means by communicating through a different second connection terminal and the first connection terminal It is characterized by having.

  According to the present invention, even if the connection terminal for performing the main light emission operation between the imaging device and the lighting device is poorly connected, the lighting device can be made to emit the main light according to an instruction from the imaging device.

It is a block diagram which shows schematic structure of the camera system which concerns on 1st Embodiment. It is a figure which shows the flowchart of operation | movement of the camera system in 1st Embodiment. It is a figure which shows the timing chart of the serial communication in 1st Embodiment. It is a timing chart of serial communication in a 1st embodiment. It is a figure which shows the timing chart of the operation | movement which detects the connection state of X terminal in 1st Embodiment. It is a figure which shows the flowchart of operation | movement of the camera system in 1st Embodiment. It is a figure which shows the timing chart of the operation | movement in connection with light emission for every light emission mode in 1st Embodiment. It is a block diagram which shows schematic structure of the camera system which concerns on 2nd Embodiment. It is a figure which shows the timing chart of the serial communication in 2nd Embodiment. It is a figure which shows the flowchart of operation | movement of the camera system in 2nd Embodiment. It is a figure which shows the flowchart of operation | movement of the camera system in 2nd Embodiment.

(First embodiment)
FIG. 1 is a block diagram illustrating a schematic configuration of a camera system according to the present embodiment. The camera system according to the present embodiment includes a camera body 1 that is an imaging device and a flash device 2 that is an illumination device that can be connected to the imaging device.

  Reference numeral 1 denotes a camera body as an imaging apparatus. A camera microcomputer 100 that controls the operation of the camera body 1, a display unit 101 that displays camera operation modes and various settings, and light emission start via a sync terminal (X terminal) described later. A switch 102 for transmitting a signal is included. Further, it has a sync SW 103 that is turned on when a focal plane shutter (not shown) of the camera body 1 is in a predetermined state.

  A connection terminal portion 110 having a plurality of connection terminals is provided between the camera body 1 and the flash device 2. The connection terminal unit 110 includes a CLK terminal, a DCS terminal, a DSC terminal, a GND terminal, and a sync terminal (X terminal). The CLK terminal is a connection terminal that transmits a clock signal for data communication from the camera microcomputer 100 to the flash device microcomputer 200, and the DCS terminal is a connection that transmits data from the camera microcomputer 100 to the flash device microcomputer 200 in synchronization with the clock signal. Terminal. The DSC terminal is a connection terminal for transmitting data from the flash device microcomputer 200 to the camera microcomputer 100 in synchronization with the clock signal, and the GND terminal is a connection terminal for connecting the GND line of the camera microcomputer 100 and the flash device microcomputer 200. The X terminal is a connection terminal that transmits a light emission start signal from the camera microcomputer 100 to the flash device microcomputer 200.

  When the light blocking member of the focal plane shutter (not shown) of the camera body 1 travels and the aperture is fully opened, the synchro SW 103 is turned on, and the camera microcomputer 100 turns on the switch 102 in response to the synchro SW 103 being turned on. When the switch 102 is turned on, the signal level of the signal via the X terminal becomes active (Lo level), and the flash device microcomputer 200 detects that the signal level of the signal via the X terminal becomes active. The flash device 2 performs the main light emission operation. That is, the signal in the active state via the X terminal is the light emission start signal via the X terminal. In this embodiment, the camera microcomputer 100 also turns on the switch 102 when performing the X terminal connection confirmation process.

  Data or the like is directly transmitted from the camera microcomputer 100 or the flash device microcomputer 200 to another communication connection terminal (CLK terminal, DCS terminal, DSC terminal, GND terminal) different from the X terminal. That is, the X terminal which is a connection terminal for transmitting a light emission start signal to the flash device 2 and the other information communication connection terminals are formed independently of each other.

  The flash device 2 is a flash device microcomputer 200 that controls the operation of the flash device 2, a battery 201, a booster circuit 202 that boosts the voltage output from the battery 201 to several hundred volts, and the electrical energy boosted by the booster circuit 202. The main capacitor 203 is stored.

  The voltage of the main capacitor 203 is divided to a voltage of about 1/100 by the resistors 201 and 211, and is monitored via the VIN terminal of the flash device microcomputer 200. The VIN terminal is an A / D input terminal. By monitoring the voltage input via the VIN terminal and controlling the booster circuit 202, the voltage of the main capacitor 203 is set to about 330V at the maximum.

  Moreover, the flash device 2 has a light emission control unit 206. The light emission control unit 206 includes a discharge tube 205 that converts electrical energy stored in the main capacitor 203 into light, a trigger unit 204 that excites the discharge tube 205 by applying a high voltage of several kV at the start of light emission, and the discharge tube 205. It is composed of switching elements that control the light emission operation. Moreover, it has the display part 207 which displays the operation mode of flash device 2, various settings, etc. Further, a light receiving sensor 208 that receives light emitted from the discharge tube 205 via an optical member, a light guide member, or the like, and a light receiving circuit 209 that monitors the amount of light received by the light receiving sensor 208 are provided. When the monitored light amount reaches a predetermined light amount, the light receiving circuit 209 outputs a light emission stop signal to the light emission control unit 206 and also outputs a light emission stop signal to the flash device microcomputer 200 via the INT terminal.

  Next, the X terminal connection confirmation processing by the camera microcomputer 100 will be described with reference to FIG. When the release switch button (not shown) is pressed down to the first stroke position, the camera microcomputer 100 starts the X terminal connection confirmation process.

  When the connection confirmation process is started, an X terminal connection confirmation preparation signal is transmitted to the flash device microcomputer 200 via the DCS terminal in step S1001, and whether or not communication with the flash device microcomputer 200 is normally performed in step S1002. Determine. The discrimination process in step S1002 is discriminated based on whether or not a response signal is received from the flash device microcomputer 200 via the DSC terminal.

  Here, serial communication between the camera microcomputer 100 and the flash device microcomputer 200 will be described with reference to FIG. X, CLK, DSC, and DCS in FIG. 3 indicate signals via the X terminal, the CLK terminal, the DSC terminal, and the DCS terminal, respectively.

  During time t0 to t1, an arbitrary command or data is transmitted from the camera microcomputer 100 through the DCS terminal in synchronization with the clock signal (bits 7 to 0 of DCS). The flash device microcomputer 200 simultaneously transmits return data (DSC bits 7 to 0) to the camera microcomputer 100.

  When a predetermined clock is transmitted from the camera microcomputer 100, a communication interrupt is generated inside the flash device microcomputer 200, and the flash device microcomputer 200 sets the signal level of the signal via the DSC terminal to Lo level (time t1). . As a result, the flash device microcomputer 200 is notified to the camera microcomputer 100 that processing is in progress (BUSY).

  When the communication interrupt processing is completed, the flash device microcomputer 200 returns the signal level of the signal via the DSC terminal to the Hi level, and notifies the camera microcomputer 100 that the next communication can be received (time t2).

  Next, communication for determining whether or not communication between the camera microcomputer 100 and the flash device microcomputer 200 has been normally performed in step S1002 will be described with reference to FIG.

  The camera microcomputer 100 transmits a communication confirmation command for confirming whether the communication is correctly performed to the flash device microcomputer 200 to the flash device microcomputer 200 via the DCS terminal in the communication 1 as the first communication.

  In response, the flash device microcomputer 200 transmits communication recognition data to the camera microcomputer 100 via the DSC terminal in communication 2. The camera microcomputer 100 determines whether or not the communication has been correctly performed by confirming the communication recognition data (communication 2: DSC bit7 to bit0) from the flash device microcomputer 200.

  Returning to the flow of FIG. 2, if the communication with the flash device microcomputer 200 is not normally performed, it is confirmed in step S1003 that the communication with the flash device 2 is not normally performed on the display unit 101 of the camera body 1. A warning is displayed.

  If the communication with the flash device microcomputer 200 is normally performed, in step S1004, the switch 102 is turned on to confirm the connection of the X terminal, and the signal via the X terminal is activated. In step S1005, the connection state of the X terminal is determined.

  Here, details of the X terminal connection confirmation will be described with reference to FIG. In synchronization with the clock signal, the camera microcomputer 100 transmits a command indicating that the signal level of the signal via the X terminal is set to the dummy active state to the flash device microcomputer 200 in communication 1. This command is a command indicating that the signal in the active state to be transmitted immediately after is not a light emission start instruction. Upon receiving this command, the flash device microcomputer 200 does not cause the discharge tube 205 to emit light even if it receives an active state signal immediately thereafter.

  After transmitting the command in communication 1, the camera microcomputer 100 releases the BUSY of the flash device microcomputer 200 and sets the signal level of the signal through the X terminal to an active state (Lo level) for a predetermined time (time t2). ~ T3).

  Next, the flash device microcomputer 200 transmits the signal detection result via the X terminal between times t2 and t3 in communication 2 as data of bit0 (DSC inversion portion of communication 2), for example. Output. That is, if it is detected that the signal level of the signal via the X terminal is Lo, bit0 = 0, and if no signal via the X terminal is detected, bit0 = 1. The camera microcomputer 100 confirms bit0 of the data transmitted from the flash device microcomputer 200 in communication 2, and determines whether or not the X terminal is normally connected.

  If the connection of the X terminal is not normal (communication via the X terminal is not normally performed), a warning indicating that the X terminal is poorly connected (connection NG) to the display unit 101 of the camera body 1 in step S1006. Is displayed.

  After determining whether or not the X terminal is normally connected, it is determined in step S1007 whether or not a release switch button (not shown) has been pressed down to the second stroke position. If not, the process proceeds to step S1001. Return and repeat the X terminal communication confirmation operation. When the release switch button is pressed down to the second stroke position, the process proceeds to step S1010 in the flowchart shown in FIG.

  In the flowchart shown in FIG. 6, following the X terminal connection confirmation process, a light emission process for causing the flash device 2 to perform main light emission by the camera microcomputer 100 is performed.

  In step S1010, the camera microcomputer 100 communicates light emission information regarding pre-light emission to the flash device microcomputer 200 using the serial communication described above. This light emission information is information such as a light emission mode (flash light emission, FP light emission), a pre-light emission amount, and the like.

  The light emission information also includes a pre-light emission start command, and the flash device microcomputer 200 performs pre-light emission when receiving the light emission information through serial communication. Specifically, when the flash device microcomputer 200 turns on the TRIG terminal in response to receiving the light emission information through serial communication, the trigger unit 204 generates a high voltage of several thousand volts and prompts the discharge tube 205 to emit light. . At the same time, when the flash device microcomputer 200 turns on the light emission control unit 206 via the SPK terminal, the discharge tube 205 starts pre-light emission.

  The light receiving circuit 209 that integrates the light emission amount of the discharge tube 205 received by the light receiving sensor 208 outputs a light emission stop signal to the light emission control unit 206 and the flash device microcomputer 200 when the light emission integral amount of the discharge tube 205 reaches a predetermined light amount. The pre-emission is stopped at a predetermined light amount.

  In step S1011, subject reflected light when the flash device 2 pre-emits is measured using a photometric sensor (not shown). In step S1012, the main light emission amount is calculated based on the subject reflected light when the pre-light is measured. In addition, about the calculation method of the main light emission amount based on subject reflected light at the time of pre-light emission, a publicly known method may be used and description is omitted.

  Next, in step S1013, based on the result of the X terminal connection confirmation process in step S1005, it is determined whether or not the X terminal is normally connected.

  If the connection of the X terminal is normal, in step S1014, the flash device microcomputer 200 uses the above-described serial communication to indicate that the main light emission amount calculated in step S1013 and the light emission start signal are transmitted via the X terminal. Send to. In step S1015, a light emission start signal is transmitted to the flash device microcomputer 200 via the X terminal.

  Specifically, when a light blocking member of a focal plane shutter (not shown) travels and the aperture is fully opened, the synchro SW 103 is turned on, and the switch 102 is turned on in response to the synchro SW 103 being turned on. When the switch 102 is turned on, the signal via the X terminal becomes active, and the flash device microcomputer 200 detects the signal via the X terminal in the active state and starts the main emission of the discharge tube 205.

  In step S1018, photographing (flash photographing) is performed in accordance with the main light emission of the flash device 2.

  If the connection of the X terminal is not normal, in step S1016, the main light emission amount calculated in step S1013 and the mode in which the light emission start signal is transmitted through the connection terminal other than the X terminal are described using the serial communication described above. Transmit to the flash device microcomputer 200.

  In step S1017, a light emission start signal is transmitted to the flash device microcomputer 200 via the CLK terminal.

  Specifically, the signal level of the signal via the CLK terminal is set to the Lo level for a predetermined time so as to be different from the clock signal described above. The flash device microcomputer 200 detects that the signal through the CLK terminal is at the Lo level, and starts the main light emission of the discharge tube 205. That is, the signal via the CLK terminal plays the same role as the light emission start signal via the X terminal.

  Even when a light emission start signal is transmitted to the flash device microcomputer 200 via the CLK terminal, photographing is performed in accordance with the main light emission of the flash device 2 in step S1018.

  Next, details of the light emission processing described in steps S1014 to S1018 will be described with reference to FIG. FIG. 7A is a timing chart of light emission processing in a mode in which a light emission start signal is transmitted to the flash device microcomputer 200 via the X terminal (hereinafter referred to as X synchronous light emission mode). FIG. 7B is a timing chart of the light emission processing in a mode in which a light emission start signal is transmitted to the flash device microcomputer 200 via the CLK terminal (hereinafter referred to as communication synchronous light emission mode).

  In the X synchronous light emission mode, the camera microcomputer 100 transmits a command for designating a terminal for transmitting a light emission start signal in the communication 1 to the flash device microcomputer 200. This command is a command indicating that the data transmitted in the communication 2 is data indicating the type of terminal that transmits the light emission start signal. And the camera microcomputer 100 transmits the data which shows that it is X synchronous light emission mode by the communication 2. FIG. In communication 1, communication 2 may not be performed as long as data indicating the X synchronous light emission mode can be transmitted.

  Next, the camera microcomputer 100 sets the signal level of the signal via the CLK terminal and the DSC terminal to the Lo level at time t2. In the X-synchronous light emission mode of the present embodiment, in order to prevent erroneous light emission, the signal through the X terminal becomes active when the signal level of the signal through the CLK terminal and the DSC terminal is at the Lo level. The tube 205 is caused to emit light. At time t2, the signal level of the signal via the CLK terminal and the DSC terminal is not set to the Lo level, and if it is detected that the signal via the X terminal is in an active state, the discharge tube 205 is caused to perform main light emission. Also good.

  Next, at time t3, the camera microcomputer 100 turns on the switch 102 in response to the fact that the light shielding member of the focal plane shutter (not shown) is running, the aperture is fully opened, and the synchro SW 103 is turned on, and the X terminal is turned on. The signal passed through is made active (Lo level).

  The flash device microcomputer 200 detects that the signal via the X terminal is in an active state, and causes the discharge tube 205 to emit light.

  In the communication synchronous light emission mode, the camera microcomputer 100 transmits data indicating the communication synchronous light emission mode by communication 1 and communication 2 as in the case of the X synchronous light emission mode. Then, at time t3, the camera microcomputer 100 detects the signal level of the signal via the CLK terminal in response to the fact that the light blocking member of the focal plane shutter (not shown) is running, the aperture is fully opened, and the synchro SW 103 is turned on. To Lo level.

  In the communication synchronous light emission mode, the flash device microcomputer 200 detects that the signal level of the signal via the CLK terminal has become Lo level, and causes the discharge tube 205 to perform main light emission.

  Instead of setting the signal level of the signal via the CLK terminal to Lo level, the signal level of the signal via the DCS terminal may be set to Lo level.

  As described above, even when the X terminal (first connection terminal) for transmitting the light emission start signal is poorly connected, the light emission start signal is communicated via the CLK terminal (second connection terminal). The illuminating device can be caused to emit main light according to an instruction from the imaging device.

(Second Embodiment)
Hereinafter, the operation of the camera system according to the present embodiment will be described with reference to FIGS. Note that the camera system in the present embodiment does not issue a light emission instruction from the camera body 10 to the flash device 20 unless it has received information indicating that the flash device 20 can emit light.

  In the first embodiment, the case where the connection terminal for transmitting the light emission start signal from the imaging device to the lighting device is poorly connected has been described. However, in the present embodiment, the lighting device can emit light from the lighting device. A case where the connection terminal that transmits the signal indicating the connection failure is described. Both the light emission start signal in the first embodiment and the signal indicating that the illumination device in the present embodiment is in a light emission enabled state are signals for causing the illumination device to perform main light emission.

  In FIG. 8, the same parts as those in FIG. 220 is a transistor, 221 is a base resistor, 222 is a base-emitter resistor, and a 223 current limiting resistor.

  As described in the first embodiment, the flash device microcomputer 200 boosts a voltage of several volts of the battery 201 by the known booster circuit 202 and charges the main capacitor 203. When charging the main capacitor 203, the voltage of the main capacitor 203 is controlled to about 330V at the maximum. If the voltage of the main capacitor 203 exceeds about 270V (light emission possible voltage), the discharge tube 205 is stabilized. It is possible to emit light. Therefore, when the voltage of the main capacitor 203 becomes equal to or higher than the light emission possible voltage, the flash device microcomputer 200 sets the signal level of the signal via the SCHGOK terminal to the Hi level. Then, a base current flows to the base of the transistor 220 via the base resistor 221, and the transistor 220 is turned on.

  On the other hand, the camera microcomputer 100 has a not-shown internal circuit that detects a current flowing through the CHGOK terminal while outputting a predetermined voltage via the CHGOK terminal. Therefore, when the flash device 20 is ready to emit light, a current flows between the collector and emitter of the transistor 220 via the current limiting resistor 223, so that the camera microcomputer 100 can detect that the flash device 20 is ready to emit light.

  FIG. 9 is a diagram showing serial communication between the camera microcomputer 100 and the flash device microcomputer 200. A command for inquiring about the state of the flash device 20 is transmitted from the camera microcomputer 100 to the flash device microcomputer 200 at time t0. At time t3, 8-bit data is transmitted from the flash device microcomputer 200 to the camera microcomputer 100 in synchronization with the clock signal via the DSC terminal. For example, bit 1 of 8-bit data from the flash device microcomputer 200 is 1 when the flash device 2 is ready to emit light, and bit 1 is 0 when the flash device 2 is not ready to emit light.

  As described above, in the present embodiment, it is possible to transmit a signal indicating that the flash device 20 is ready to emit light to the camera microcomputer 100 not only via the CHGOK terminal but also via the DSC terminal. Yes. That is, the signal via the DSC terminal plays the same role as the signal via the CHGOK terminal.

  Next, a process for confirming whether the flash device 20 is ready to emit light by the camera microcomputer 100 will be described with reference to FIG.

  When the release switch button (not shown) is pressed down to the first stroke position, the camera microcomputer 100 starts the process shown in FIG.

  In step S2001, a CHGOK terminal connection confirmation preparation signal is transmitted to the flash device microcomputer 200 via the DCS terminal, and in step S2002, it is determined whether or not communication with the flash device microcomputer 200 has been normally performed. The discrimination process in step S2002 is a process for discriminating whether or not serial communication using the CLK terminal, DCS terminal, DSC terminal, etc. has been performed normally, and is similar to the discrimination process in step S1002 of FIG. Description is omitted.

  If the communication with the flash device microcomputer 200 is not normally performed, a warning or the like indicating that the communication with the flash device 20 is not normally performed is displayed on the display unit 101 of the camera body 10 in step S2003.

  If the communication with the flash device microcomputer 200 is normally performed, the current flowing through the CHGOK terminal is checked in step S2004 in order to check whether or not the flash device 20 is ready to emit light.

  As a result of confirming the state of the flash device 20 via the CHGOK terminal in step 2004, if the flash device 20 is in a light-emission enabled state, the flash device 20 is in a state ready for light emission on the display unit 101 of the camera body 10 in step S2009. To show information.

  When the flash device 20 is not ready to emit light, it is also assumed that communication via the CHGOK terminal is not normally performed. Therefore, as a result of checking the state of the flash device 20 via the CHGOK terminal in step 2004, if the flash device 20 is not in a light-emission enabled state, it is determined that communication via the CHGOK terminal is not normally performed. In step S2007, serial communication is performed as described above to check whether or not the flash device 20 is ready to emit light. When it is confirmed in step S2007 that serial flash communication is performed and the flash device 20 is ready to emit light, the process proceeds to step S2009, and information indicating that the flash device 20 is ready to emit light is displayed on the display unit 101 of the camera body 10. Is displayed.

  If it is determined that the flash device 20 is not ready for light emission even after serial communication, information indicating that the flash device 20 is not ready for light emission is displayed on the display unit 101 of the camera body 10 in step S2008.

  As described above, the state of the flash device 20 is confirmed via the CHGOK terminal, and when the flash device 20 is not ready to emit light, serial communication is performed to confirm the state of the flash device 20 again. However, the state of the flash device 20 can be confirmed.

  Therefore, the problem that the flash device 20 cannot emit light even if the flash device 20 can emit light due to poor connection of the CHGOK terminal can be solved.

  After information on the state of the flash device 20 is displayed on the display unit 101 of the camera body 10, in step S2010, it is determined whether or not a release switch button (not shown) has been pressed down to the second stroke position. If not, the process returns to step S2001 to repeat the communication confirmation operation. When the release switch button is pressed down to the second stroke position, the process proceeds to step S2020 in the flowchart shown in FIG.

  In step S2020, it is determined whether or not the flash device 20 is ready for light emission. If the light emission is possible, the process proceeds to step S2021, and if not, the process proceeds to step S2026. The processing in steps S2021 to S2025 is the same as steps S1010 to S1012, S1014, and S1018 in FIG. In step S2025, the X synchronous light emission mode is used.

  If the flash device 20 is not ready to emit light, the subject is measured with a photometric sensor (not shown) without emitting the flash device 20 in step S2026, and an exposure control value such as an aperture value or shutter speed is calculated based on the photometric result. In step S2027, shooting is performed.

  As described above, even if the CHGOK terminal (first connection terminal) for communicating a signal indicating that the lighting device is in a light-emission enabled state is poorly connected, the DSC terminal (second connection terminal) is used. Thus, a signal indicating that light emission is possible can be communicated. Therefore, it is possible to solve the problem that the lighting device cannot emit light even if the lighting device is capable of emitting light due to poor connection of the connection terminal.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 1 Camera body 2 Flash apparatus 100 Camera microcomputer 110 Connection terminal part 200 Flash apparatus microcomputer

Claims (18)

A camera system having an imaging device and a lighting device connectable to the imaging device,
A plurality of connection terminals for connecting the imaging device and the illumination device;
And discriminating means for discriminating the connection status of the first connection terminal for communicating signals to the of the plurality of connection terminals, thereby the illumination device emitting the light,
If communication via the first connection terminal is determined to be not successful by the discriminating means, similar to the signal for emitting light to the illumination device to be communicated via the first connecting terminal Control means for communicating a signal that fulfills the following role via a second connection terminal different from the first connection terminal among the plurality of connection terminals;
A camera system comprising: The first connection terminal is a connection terminal for transmitting the light emission start signal to the lighting device from the imaging device,
The camera system according to claim 1, wherein the second connection terminal is a connection terminal used when serial communication is performed between the imaging device and the illumination device. 3. The camera system according to claim 2, wherein the signal for causing the illumination device communicated via the first connection terminal to emit light is a light emission start signal for causing the illumination device to perform main light emission. . Wherein if the communication through the first connection terminal is determined to be not successful by the discriminating means, before Symbol Luminous start signal transmitted via the first connection terminal and After transmitting a signal having the same role using the second connection terminal to the lighting device by serial communication using the second connection terminal, the signal is transmitted via the second connection terminal. the camera system according to claim 3, characterized by transmitting the same role signals before and Symbol - emitting start signal Te. The first connection terminal is a connection terminal for transmitting a signal indicating whether or not light emission is possible from the illumination device to the imaging device;
The camera system according to claim 1, wherein the second connection terminal is a connection terminal used when serial communication is performed between the imaging device and the illumination device. When the determination means determines that communication via the first connection terminal is not normally performed by the determination means, the lighting device can emit light by serial communication using the second connection terminal. 6. The camera system according to claim 5 , wherein a signal indicating whether or not is communicated. A plurality of connection terminals connected to the lighting device;
And discriminating means for discriminating the connection status of the first connection terminal for communicating signals to the of the plurality of connection terminals, thereby the illumination device emitting the light,
If communication via the first connection terminal is determined to be not successful by the discriminating means, similar to the signal for emitting light to the illumination device to be communicated via the first connecting terminal Control means for communicating a signal that fulfills the following role via a second connection terminal different from the first connection terminal among the plurality of connection terminals;
An imaging device comprising: The first connection terminal is a connection terminal for transmitting the light emission start signal to the lighting device,
The imaging device according to claim 6, wherein the second connection terminal is a connection terminal used when serial communication with the illumination device is performed. 9. The imaging device according to claim 8, wherein the signal for causing the illumination device communicated via the first connection terminal to emit light is a light emission start signal for causing the illumination device to emit main light. . Wherein if the communication through the first connection terminal is determined to be not successful by the discriminating means, before Symbol Luminous start signal transmitted via the first connection terminal and After transmitting a signal having the same role using the second connection terminal to the lighting device by serial communication using the second connection terminal, the signal is transmitted via the second connection terminal. the imaging apparatus according to claim 9, characterized by sending the same role signals before and Symbol - emitting start signal Te. The first connection terminal is a connection terminal for receiving a signal indicating whether or not light emission is possible from the lighting device;
The imaging device according to claim 7 , wherein the second connection terminal is a connection terminal used when performing serial communication with the illumination device . When the determination means determines that communication via the first connection terminal is not normally performed by the determination means, the lighting device can emit light by serial communication using the second connection terminal. The imaging apparatus according to claim 11 , wherein communication of a signal indicating whether or not is performed. Light emitting means;
A plurality of connection terminals connected to the imaging device;
If the of the plurality of connection terminals, a first communication over a connection terminal for communicating signals for emitting light from the light emitting means is not successful, via the first connection terminal similar roles signal and a signal for performing light emission by the light emitting means to be communicated Te, wherein in the plurality of connection terminals, via a different second connection terminal and the first connection terminal and control means for emitting light to said light emitting means by communicating,
A lighting device comprising: The first connection terminal is a connection terminal for receiving the image pickup device or al - emitting start signal,
The lighting device according to claim 13 , wherein the second connection terminal is a connection terminal used when performing serial communication with the imaging device. 15. The illumination according to claim 14, wherein a signal for performing light emission by the light emitting unit communicated via the first connection terminal is a light emission start signal for causing the light emitting unit to perform main light emission. apparatus. The control means sending the same role signals before and Symbol - emitting start signal transmitted via the first connection terminal using the second connection terminal, said second connection the serial communication using terminal after receiving from the imaging device, thereby emitting the light emitting means in response to receiving a similar role signals before and Symbol - emitting start signal through the second connection terminal The lighting device according to claim 15 . The first connection terminal is a connection terminal for transmitting a signal indicating whether or not light emission is possible to the imaging device;
The lighting device according to claim 13 , wherein the second connection terminal is a connection terminal used when performing serial communication with the imaging device. When the communication through the first connection terminal is not normally performed, the control unit performs communication of a signal indicating whether or not the light emission is possible by serial communication using the second connection terminal. The lighting device according to claim 17 , wherein the lighting device is performed.

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