JP2015191000A - Imaging device, flash device and flash photographing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an imaging device that enables light emission control of a flash light emitting unit and a continuous light emitting unit capable of continuous lighting, respectively.SOLUTION: An imaging device comprises: an imaging unit that photographs a subject image formed by an image formation optical system; a recording unit that records an image signal photographed by the imaging unit; a flash light emitting unit that is capable of pre-light emitting and main light emitting; a continuous light emitting unit that is capable of the pre-light emitting and continuous light emitting; a light emitting control unit that causes the flash light emitting unit and the continuous light emitting unit to implement the pre-light emitting, respectively before photographing in which the recording unit records the image signal from the imaging unit as a storage image, then, causes the flash light emitting unit to implement the main light emitting during the photographing, and causes the continuous light emitting unit to implement the continuous light emitting; and a light emitting mode selection unit that selects one light emitting mode from a plurality of light emitting modes having a mode between the pre-light emitting of the flash light emitting unit and the main light emitting thereof and the pre-light emitting of the continuous light emitting unit and the continuous light emitting thereof combined.

Description

  The present invention relates to a photographing device capable of photographing using flash light and continuous lighting light, a flash device, and a flash photographing system.

  Conventionally, in a camera capable of shooting using a flash device, a device that measures light by pre-flashing the flash device before imaging and controlling the light emission amount of the flash device at the time of imaging based on the photometric result at this time is known. (Patent Document 1). A flash device that emits light repeatedly by a constant small amount of light is known (Patent Documents 1 and 2). In addition, in a flash device, it is known that an LED is provided as a continuous light emitting unit capable of continuous light emission and on / off control in a short time separately from the flash light emitting unit, and the light emission of the flash light emitting unit is compensated by the light emission of the LED. (Patent Document 3).

JP 2002-169194 A JP 2002-169204 A JP 2007-178925 A

  Although the flash device is suitable for emitting a large amount of illumination light in a short time, there is a problem that the continuous light emission with a small amount of light makes the control complicated. In Patent Documents 1 and 2, since the flash device repeatedly emits light with a constant small amount of light for flat light emission, light emission control with a small amount of light is complicated. In Patent Document 3, an LED is used as a light source capable of continuous light emission, but the LED is only used to compensate for a shortage of light quantity in the flash light emitting unit.

  Conventionally, there has been no photographing apparatus that causes both the flash light emitting unit and the continuous light emitting unit to perform pre-light emission and main light emission at a desired timing, light emission mode and light emission amount.

  An object of the present invention is to obtain a photographing device, a flash device, and a flash photographing system capable of controlling light emission for each of a flash light emitting unit and a continuous light emitting unit capable of continuous light emission (lighting) based on the above problem awareness.

  The present invention relates to an imaging unit that captures an image of a subject formed by a photographing optical system, a recording unit that records an image signal captured by the imaging unit, a flash light emitting unit capable of pre-emission and main emission, and pre-emission. A continuous light emitting unit capable of continuous light emission, and a flash light emitting unit and a continuous light emitting unit are pre-lighted before imaging in which the recording unit records an image signal from the imaging unit as a stored image, and then the flash is emitted during imaging. A light emission control unit that causes the light emitting unit to emit main light and continuously emits the continuous light emitting unit, and a plurality of light emission modes that combine the pre-light emission and main light emission of the flash light emitting unit and the pre-light emission and continuous light emission of the continuous light emitting unit. And a light emission mode selection unit that selects one light emission mode from the inside.

  The imaging apparatus of the present invention includes a photometric unit that measures subject brightness when one or both of the flash light emitting unit and the continuous light emitting unit pre-emit, or both are extinguished, before the imaging, and the photometry It is practical to further include a calculation unit that calculates the exposure value in the imaging and the main light emission amount of the flash light emitting unit and the continuous light emission amount of the continuous light emitting unit based on the subject luminance measured by the unit.

  It is practical that the photographing apparatus of the present invention further includes a first switch that operates the light emission control unit and a second switch that causes the imaging unit to capture an image.

  In the light emission mode, the continuous light emitting unit starts continuous light emission in response to an on operation of the first switch and maintains continuous light emission until the end of imaging, and the flash light emission in response to an on operation of the second switch. The pre-flashes and the photometry unit performs photometry, and the photometry unit performs photometry when the flash flash unit finishes pre-flash, and then the imaging unit starts imaging, and the flash The part preferably includes a light emission mode in which the main light emission is performed.

  In the light emission mode, the continuous light emitting unit continuously emits light and the photometric unit measures light in response to an ON operation of the second switch, and the flash light emitting unit performs pre-light emission when the continuous light emitting unit is turned off. The light metering unit performs light metering, and the flash light emitting unit performs pre-emission when the flash light emitting unit finishes pre-flash, and then the continuous light emitting unit starts continuous light emission, and the imaging unit starts imaging during the continuous light emission. In addition, it is preferable to include a light emission mode in which the flash light emitting unit performs main light emission during the imaging.

  In the light emission mode, the continuous light emitting unit starts continuous light emission in response to an ON operation of the second switch, the flash light emitting unit performs pre-light emission, the photometry unit measures light, and the flash light emission unit performs pre-light emission. The light metering unit performs light metering at the end of the time, and then the imaging unit starts imaging in a state where the continuous light emitting unit continuously emits light, and includes a light emission mode in which the flash light emitting unit performs main light emission during the imaging. Can do.

  In the light emission mode, the continuous light emitting unit continuously emits light in response to an ON operation of the second switch, and the flash light emitting unit performs pre-light emission while the continuous light emitting unit continuously emits light, and the photometry unit Metering is performed, the light metering unit performs light metering in a state where the flash light emitting unit finishes emitting light and the continuous light emitting unit is turned off, and then the continuous light emitting unit starts continuous light emission and continuously emits light. Can start imaging, and the flash emission unit can emit light during the imaging.

  In the light emitting mode, the continuous light emitting unit starts continuous light emission in response to an ON operation of the first switch, and the continuous light emitting unit is turned off and the flash light emitting unit is turned off in response to an ON operation of the second switch. When the pre-flash is fired, the photometry unit performs photometry.When the flash light-emitting unit finishes pre-flash, the photometry unit performs photometry, and then the imaging unit starts imaging. The main light emission mode can be included.

  It is practical that the calculation unit calculates the appropriate exposure value in the imaging, the main light emission amount of the flash light emission unit, and the light emission amount of the continuous light emission unit based on the photometric value measured by the photometry unit.

  The photographing apparatus of the present invention further includes a photographing distance input unit for inputting a photographing distance of the photographing optical system, and the calculation unit is configured to correspond to the photographing distance input by the photographing distance input unit. The ratio of the main light emission amount and the light emission amount of continuous light emission during the imaging of the continuous light emission unit can be set.

  The photographing apparatus of the present invention further includes a focal length input unit that inputs a focal length of the photographing optical system, and the calculation unit inputs the photographing distance input by the photographing distance input unit and the focal length input unit. The ratio of the main light emission amount of the flash light emission unit in the main light emission and the light emission amount of continuous light emission during the imaging of the continuous light emission unit can be set according to the photographing magnification determined by the focal length.

  The flash device includes a bounce mechanism that changes the light emitting direction of the flash light emitting unit, the photometric unit includes a split photometric sensor that measures a plurality of subject areas, and the calculation unit includes the light emission control unit. When the flash light emitting unit and the continuous light emitting unit are pre-flashed, and the flash light emitting unit is bounced, a photometric value in which the difference between the photometric values of the plurality of divided photometric sensors is less than a predetermined value is obtained. The average value can be obtained as the subject brightness.

  It is practical that the light emission mode selection unit includes an operation unit for selecting any one of the light emission modes.

  It is practical that the flash light emitting unit and the continuous light emitting unit are mounted on an external flash device that can be attached to and detached from the camera body, and the external flash device and the camera body include a communication unit that exchanges flash information. .

  A flash device of the present invention includes an imaging unit that captures a subject image formed by a photographing optical system, a recording unit that records an image signal captured by the imaging unit, and a communication unit that communicates with an external flash device. A flash device connectable to a camera body, a flash light emitting unit capable of pre-light emission and main light emission, a continuous light emission unit capable of pre-light emission and continuous light emission, and a communication unit communicating between the camera body And before the imaging in which the recording unit of the camera body records the image signal from the imaging unit by communication between the communication unit and the communication unit of the camera body, A light emission control unit that controls on / off of the continuous light emission of the continuous light emission unit and subsequently flashes the flash light emission unit during imaging. It is characterized in that was.

  A flash photographing system of the present invention includes a camera body including an imaging unit that captures a subject image formed by a photographing optical system, a recording unit that records an image signal captured by the imaging unit, and a detachable attachment to the camera body. A flash photographing system comprising a flash light emitting unit and an external flash device having a continuous light emitting unit capable of continuous light emission, wherein the camera body records the image signal from the imaging unit. A flash control unit that pre-flashes each of the flash light emitting unit and the continuous light emitting unit before imaging recorded by the unit, and then performs main flash emission of the flash light emitting unit and continuously emits the continuous light emitting unit during imaging, and a flash of the external flash device Select from multiple emission modes that combine the pre-light emission and main light emission of the light emitting part and the pre-light emission and continuous light emission of the continuous light emission part. And emission mode selection unit for, characterized by comprising a.

  According to the photographing apparatus of the present invention, it can be connected to an illumination device including a flash light emitting unit and a continuous light emitting unit, and the flash light emitting unit and the continuous light emitting unit can perform pre-light emission and main light emission in a desired manner. Therefore, it is possible to easily shoot with various lighting technologies.

1 is a perspective view showing an appearance of an embodiment of a photographing system including a photographing device and a flash device according to the present invention. 1 is a block circuit diagram showing an embodiment of a main circuit configuration of a photographing apparatus according to the present invention. 1 is a block circuit diagram showing an embodiment of a main circuit configuration of a flash device according to the present invention. (A), (B), (C), (D), and (E) are diagrams showing examples of timing charts related to flash photographing operations in different light emission modes of the photographing apparatus according to the present invention. It is a flowchart which shows an example of the main imaging | photography operation | movement of the imaging device of this invention. It is a flowchart which shows an example of the flash light emission amount calculation process in the flash imaging | photography operation | movement by the imaging device of this invention. It is a flowchart which shows an example of the LED light emission amount calculation process in the flash imaging | photography operation | movement by the imaging device of this invention. It is a flowchart which shows an example of the flash and LED light emission amount calculation process in the flash imaging | photography operation | movement by the imaging device of this invention. It is a flowchart which shows an example of the pre flash photometric value calculation process in the flash photographing operation by the photographing apparatus of the present invention. It is a flowchart which shows an example of the flash main light emission amount calculation process in the flash imaging | photography operation | movement by the imaging device of this invention.

  The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a digital single-lens reflex camera to which the photographing apparatus of the present invention is applied. The digital single-lens reflex camera includes a camera body 10, an external flash device 50 as an external flash that is detachably attached to the camera body 10, and a photographic lens 100 (photographic optical system 101) that is detachably attached to the camera body 10. It has. The external flash device 50 is controlled to emit light by communication directly executed with the camera body 10.

  FIG. 2 is a block diagram showing a control system of the camera body 10. The camera body 10 includes a CPU 13 as a control unit that controls the overall operation of the camera. The CPU 13 includes a ROM that stores a control program and the like, and a RAM 13a that temporarily stores control data. The voltage of the battery 1 is supplied to the CPU 13 as a constant voltage Vdd via the regulator 2.

  The CPU 13 displays various information related to photographing, such as a display 5 such as an LCD, an EEPROM 6 for writing various rewritable parameters and modes, and lens communication for communicating with a photographing lens attached to the camera body 10. A flash communication interface 8 for communicating with the interface 7 and an external flash mounted on the camera body 10 is connected via port groups Pe, Pd, Pc, and Pb, respectively.

  A flash connection terminal group 4 is connected to the flash communication interface 8. The flash connection terminal group 4 is provided with five terminals C, R, Q, X, and G. The X terminal is an X contact terminal that outputs an X contact signal in synchronism with the completion of the front curtain travel of the focal plane shutter, the G terminal is a ground terminal, the C terminal is a control terminal that outputs a control signal for controlling an external flash, and the R terminal is A clock terminal for outputting a clock signal to the external flash, Q is a dual-purpose terminal for bidirectional data communication between the camera body 10 and the external flash and for outputting a quench signal to the external flash. The flash communication interface 8 constitutes a communication unit that exchanges flash information with the external flash device 50.

  A metering switch SWS, a release switch SWR, a main switch SWM, and an information setting switch group 9 are connected to the CPU 13 via ports P2, P1, P0, and a port group Pa, respectively. The metering switch SWS and the release switch SWR are interlocked with the release button 31 (FIG. 1). The metering switch SWS is turned on when the release button 31 is half-pressed, and the release switch SWR is turned on when the release button 31 is fully pressed. . The photometric switch SWS constitutes a first switch, and the release switch SWR constitutes a second switch. The main switch SWM is linked to a power switch (not shown) of the camera body 10 and is turned on when the power switch is operated to the on position.

  The information setting switch group 9 includes a light emission mode selection switch for selecting a flash light emission mode and a switch for selecting shooting mode information. In addition to the conventional automatic emission mode, forced emission mode, emission inhibition mode, and AF auxiliary emission mode, the flash emission mode includes pre-emission and main emission of the flash emission unit 92, and pre-emission and main emission of the LED emission unit 93. A plurality of light emission modes combining modes of (continuous light emission) are included. The information setting switch group 9 constitutes an operation unit for selecting an arbitrary one from a plurality of light emission modes. The pre-light emission of the flash light emitting unit 92 is light emission with a smaller light amount than the main light emission, and includes the case of short-time light emission. The pre-light emission of the LED light emitting unit 93 is continuous light emission (continuous lighting) in a shorter time than the main light emission, and the light emission intensity is not limited.

  The CPU 13 is connected to an image sensor (imaging unit) 14 that captures (exposes) a subject image formed by the photographing optical system 101 of the photographing lens 100, converts the image into an image signal, and outputs the image signal. The image signal output from the image sensor 14 is subjected to predetermined image signal processing by the CPU 13, displayed on the display 5, and recorded (written) on the memory card 22. Hereinafter, the imaging operation (exposure operation) of the image sensor 14 when the image sensor 14 captures an image and records the captured image signal in the memory card 22 is referred to as “imaging”. In addition, when the image captured by the image sensor 14 is displayed on the display 5 and is not recorded on the memory card 22 such as a so-called live view mode or monitor mode, the imaging operation of the image sensor 14 is live view imaging or monitor imaging. . The CPU 13 and the memory card 22 constitute a recording unit that records an image signal captured by the image sensor 14.

  Connected to the CPU 13 are a shooting distance input unit 25 and a focal length input unit 26 for inputting the shooting distance and the focal length of the mounted shooting lens 100 via lens communication processing.

  The CPU 13 includes a motor control circuit 15 that drives a mirror drive motor, a shutter charge motor, an AF motor, and the like (not shown), an AF circuit 16 that detects the focus state of the subject using a phase difference method, and an aperture control that opens and closes the aperture of the photographing lens. A circuit 17 and a shutter control circuit 18 for controlling the running of the shutter curtain are connected via port groups Pf, Pg, Ph, Pi, and Pj, respectively.

  Further, a photometric circuit 19 is connected to the CPU 13 via a port group Pk. The photometric circuit 19 is a circuit that performs processing such as A / D conversion on the photometric signal measured by the split photometric sensor 20 and outputs the result to the CPU 13. Although not shown, the split photometric sensor 20 is arranged around the pentaprism so as to receive subject light passing through the finder optical path. This divided photometric sensor 20 has nine photometric elements 20 (n), and each photometric element 20 (n) uses the entire photographing screen or a part of the photographing screen (central region) as nine photometric regions. The subject luminance can be measured for each of the divided photometry areas. n is an integer of 1 to 9.

  In the present embodiment, the flash light emitting unit 92 and the LED light emitting unit 93 are pre-lighted before imaging, and the subject luminance is measured by the divided photometric sensor 20, and based on the photometric values of the photometric elements 20 (1) to 20 (9). Thus, the shutter speed and aperture value, which are the exposure values of the image sensor 14, and the main light emission amounts of the flash light emitting unit 92 and the LED light emitting unit 93 are calculated. In this embodiment, the pre-light emission of the flash light emitting unit 92 is light emission with a smaller amount of light than the main light emission, and the pre-light emission of the LED light emitting unit 93 is continuous light emission for a shorter time than the main light emission (short-time continuous lighting). is there. The main light emission of the LED light emitting unit 93 is continuous light emission (continuous lighting) that maintains the light emission state for all periods during imaging (exposure).

  The light emission mode in which the external flash device 50 (flash light emitting unit 92 and LED light emitting unit 93) emits / lights up is from when the photometric switch SWS (first switch) is turned on until the release switch SWR (second switch) is turned on. The light emission mode of the LED light-emitting unit 93 and the release switch SWR are turned on and the flash light-emitting unit 92 and the LED light-emitting unit 93 are pre-lighted at a certain time difference or at the same time before the image sensor 14 starts imaging. A mode in which pre-emission and main emission in which one or both of the flash emission unit 92 and the LED emission unit 93 emit light with a predetermined light emission mode, a predetermined timing, and a predetermined light emission amount when the image sensor 14 captures an image thereafter It is.

  The CPU 13 sets the flash light emitting unit 92 and the LED light emitting unit 93 in a plurality of different light emission modes in a pre-light emission mode corresponding to the selected light emission mode before imaging the subject image to be recorded on the memory card 22 by the image sensor 14. A light emission control unit 13b that performs pre-light emission and performs main light emission in a corresponding main light emission mode during imaging, and a light emission mode selection unit 13c that selects a light emission mode according to shooting conditions. Further, the CPU 13 splits the photometric sensor 20 (photometric element 20 (n)) when the light emission control unit 13b causes the flash light emission unit 92 and the LED light emission unit 93 to pre-emit according to the light emission mode selected by the light emission mode selection unit 13c. And a calculation unit 13e that calculates the main light emission amount of the flash light emitting unit 92 and the LED light emitting unit 93 based on the input photometric value (subject luminance). The CPU 13 comprehensively controls the operations of the respective light emission control units 13b, the light emission mode selection unit 13c, the photometry unit 13d, and the calculation unit 13d and the camera functions thereof.

  FIG. 3 is a block diagram showing a control system of the external flash device 50 which is the flash device of the photographing apparatus shown in FIG. The external flash device 50 includes a main body 91 containing a battery, a control board, and the like, a flash light emitting unit 92 connected to the upper part of the main body 91 via a bounce mechanism 94, and an LED light emitting unit 93 on the front surface of the main body 91. A mounting portion 95 is provided at the lower portion of the main body portion 91, and is attached to the accessory shoe 27 provided at the upper portion of the camera body 10 via the mounting portion 95. The external flash device 50 (flash light emitting unit 92) has a built-in zoom flash function that can change the irradiation angle in conjunction with the focal length of the taking lens 100. The flash light emitting unit 92 is changed in the vertical direction and the horizontal direction via the bounce mechanism 94. The external flash device 50 functions as an external flash of the camera when attached to the camera body 10 and functions as a slave flash when not attached to the camera body 10.

  The external flash device 50 includes a flash CPU 65 as a control unit that controls the overall operation of the entire device. The flash CPU 65 is supplied with the voltage of the battery 51 through the Schottky diode 52 and the regulator 54 as a constant voltage Vdd1. The voltage of the battery 51 is also supplied to the capacitor 53 via the Schottky diode 52.

  The flash CPU 65 has a motor drive circuit 62 for driving the zoom motor 61, various rewritable parameters, an EEPROM 60 for writing a mode, and a camera communication interface 59 for executing communication with the mounted camera body 10. They are connected via the groups Pb, Pc, Pd. The camera communication interface 59 constitutes a communication unit that exchanges flash information with the flash communication interface 8 of the attached camera body 10.

  The zoom motor 61 functions as a driving unit that moves the light emitting unit 55. The light emitting unit 55 is formed by integrating the xenon tube 82, the reflector 55c, and the protective glass 55b. When the light emitting unit 55 is moved by the zoom motor 61, the interval between the light emitting unit 55 and the Fresnel lens 55a changes, and the irradiation angle of the flash light changes. The light emitting unit 55, the zoom motor 61 and the Fresnel lens 55 a are built in the flash light emitting unit 92 and constitute the flash light emitting unit 92.

  An LED drive circuit 70 is connected to the flash CPU 65 via a port Pf. A white high-brightness LED 71 is connected to the LED drive circuit 70. LED71 consists of one or more. The LED drive circuit 70 controls the light emission of the LED 71 under the control of the flash CPU 65 according to the light emission mode. The LED 71 constitutes an LED light emitting unit 93.

  The camera communication interface 59 includes a camera connection terminal 56. The camera connection terminal 56 includes five terminals of C, R, Q, X, and G. When the external flash device 50 is attached to the accessory shoe 27 of the camera body 10 via the attachment portion 95, the five terminals C, R, Q, X, and G are connected to the C, R, Q, X, and G of the camera body 10, respectively. Electrically connected to 5 terminals of G. The C terminal is a control terminal for inputting a control signal from the camera body 10, the R terminal is a clock terminal for inputting a clock signal from the camera body 10, and the Q terminal is for bidirectional data communication between the camera body 10 and the flash and a quench signal input. The dual-purpose terminal, the X terminal is a terminal for inputting an X contact signal from the X terminal of the camera body 10, and the G terminal is a ground terminal. The C, R, and Q terminals of the camera connection terminal 56 are connected to Pd1, Pd2, and Pd3 of the port group Pd of the flash CPU 65, respectively.

  When the external flash device 50 is attached to the accessory shoe 27 of the camera body 10 via the attachment portion 95, the C, R, and Q terminals of the camera connection terminal 56 are respectively Pd1, Pd2, and Pd1 of the port group Pd of the flash CPU 65. Connected to Pd3. The flash CPU 65 performs camera-flash communication with the CPU 13 of the camera body 10 via the C terminal, R terminal, and Q terminal. The X terminal is connected to the port Pd4 and receives an X contact terminal signal from the camera body 10.

  An information setting switch group 63 and a main switch 64 are connected to the flash CPU 65 as switches. The main switch 64 is a slide switch and stops at the OFF position and the ON position.

  The information setting switch group 63 is connected to the flash CPU 65 via the port group Pa. The information setting switch group 63 includes a light emission mode request setting switch, a dimming mode request setting switch, a sync request setting switch, a wireless mode setting switch, a system changeover switch, and the like. When the light emission mode request setting switch receives a light emission command, light emission amount data, or the like corresponding to the light emission mode from the camera body 10 through communication, whether or not the flash light emission unit 92 and the LED light emission unit 93 perform a light emission operation according to the request. It is a switch to set.

  A wireless light receiving circuit 58 that processes the output of the wireless light receiving element 57 and an LCD display 72 that displays various information such as dimming confirmation information are connected to the flash CPU 65 via port groups Pe and Pg, respectively. The wireless light receiving element 57 is an element for receiving light emitted from the built-in flash or the external flash when the external flash device 50 functions as a slave flash.

  The flash CPU 65 is connected to a booster circuit 66 that boosts the voltage of the battery 51 via a port P2, and the RLS output terminal of the charge detection circuit 69 is connected via an A / D conversion port Pad. The voltage boosted by the booster circuit 66 is supplied to the main capacitor 79 via the diode 67 and also supplied to the charge detection circuit 69 via the diode 68. The charge detection circuit 69 receives the voltage HV ′ equivalent to the terminal voltage HV of the main capacitor 79 only when the booster circuit 66 is operating, and detects the charge voltage of the main capacitor 79.

  The flash CPU 65 is connected with a 30V generation circuit 77, a level shift circuit 78, and a trigger circuit 80 via ports P4, P5, and P3, respectively. The 30V generation circuit 77 is a circuit that generates a voltage of 30V from the 30Vout terminal using the terminal voltage HV of the main capacitor 79 as a power source. The 30 V voltage output from the 30 V generation circuit 77 is applied to the level shift circuit 78. When the port P5 (IGBTctl signal) is “1”, the level shift circuit 78 applies the voltage of 30V supplied from the 30V generation circuit 77 to the gate IGBTg of the IGBT 83, and turns on the IGBT 83. On the other hand, when the port P5 is “0”, the voltage application to the gate IGBTg is stopped and the IGBT 83 is turned off. The trigger circuit 80 applies a high oscillating voltage to the trigger electrode XeT terminal of the xenon tube 82 to bring the xenon gas in the xenon tube 82 into an excited state. In this excited state, when the IGBT 83 is on, the accumulated charge in the main capacitor 79 is discharged through the coil 81, the xenon tube 82, and the IGBT 83, and the xenon tube 82 emits light.

  Further, the non-inverting input terminal of the comparator 75 is connected to the flash CPU 65 via the D / A conversion port Pda, and the capacitor 73 and the resistor 74 are connected to the ports P6 and P7, respectively. A connection point between the capacitor 73 and the resistor 74 is connected to the inverting input terminal of the comparator 75. A light emission amount detection photometric element 85 is further connected to the inverting input terminal of the comparator 75. The light emission amount detecting photometric element 85 is provided at a position where the light emitted from the xenon tube 82 can be directly received via the protective glass 55b of the light emitting unit 55. When the light emitted from the xenon tube 82 is received, the light amount detection photometric element 85 corresponds to the received light amount. Output photocurrent. The comparator 75 compares the predetermined voltage FPlvv input from the D / A conversion port Pda with the voltage PDfl corresponding to the output of the light emission amount detection photometric element 85, and when the voltage PDfl is equal to or lower than the predetermined voltage FPlvl, “0”. When the voltage PDfl exceeds the predetermined voltage FPlvl, “1” is output. The output of the comparator 75 is given to the level shift circuit 78 via the resistor 76. When the port P5 is set to the input mode, the level shift circuit 78 inputs the output of the comparator 75 as the IGBTctl signal, turns on / off the IGBT 83, and turns on / off the flash emission of the xenon tube 82, The amount of light emission is adjusted according to the off timing.

  4 is a timing chart shown in FIG. 4 and FIGS. 5 to 10 show the shooting operation in which the camera body 10 performs flash photography by pre-flashing and main flashing of the flash light emitting unit 92 and the LED light emitting unit 93 of the external flash device 50. This will be described with reference to the flowchart. The camera body 10 of the present invention has five types of light emission modes A to E as a plurality of different light emission modes.

  FIG. 4A shows a timing chart of the light emission mode A. The light emission mode A is a mode in which the LED light emitting unit 93 is lit until the pre-light emission after the photometry switch SWS is turned on to obtain the AF auxiliary light effect and the flash light emitting unit 92 emits light during imaging.

  When the photometric switch SWS is turned on, the camera body 10 performs normal flash communication with the external flash device 50 and communicates an LED lighting command to the external flash device 50, and the external flash device 50 lights the LED light emitting unit 93.

  When the release switch SWR is turned on (when the release button 31 is fully pressed), an LED turn-off command and a flash pre-flash trigger are transmitted from the camera body 10 to the external flash device 50 by flash communication immediately before exposure. The external flash device 50 turns off the LED light emitting unit 93 (stops light emission), and preflashes the flash light emitting unit 92. The camera body 10 performs photometry in synchronization with the pre-emission of the flash light emitting unit 92, and then performs photometry (steady light photometry) in a state where the flash light emitting unit 92 and the LED light emitting unit 93 are not emitting light. Then, the camera body 10 calculates the subject luminance component due to the flash light when the LED light-emitting unit 93 is not lit, and calculates the shutter speed (exposure time) Tv and aperture value Av for proper exposure and the flash main light emission amount. Calculate. The exposure time Tv and the aperture value Av are apex display values.

  Then, the camera body 10 transmits the calculated main light emission amount to the external flash device 50 by flash communication during mirror-up, drives the mirror motor by the motor control circuit 15 and starts mirror-up, and shoots by the aperture control circuit 17. The aperture of the lens 100 is reduced to the calculated aperture value Av.

  When the mirror up is completed, the camera body 10 transmits a main light emission preparation request command to the external flash device 50 by flash communication immediately before shutter control. Further, the camera body 10 causes the shutter control circuit 18 to start running the shutter front curtain and causes the image sensor 14 to start imaging. The camera body 10 outputs an X contact signal to the external flash device 50 when the shutter front curtain completes traveling. The external flash device 50 causes the flash light emitting unit 92 to perform main light emission based on the main light emission amount. When the shutter speed (exposure time) Tv has elapsed, the camera body 10 causes the shutter control circuit 18 to run the shutter rear curtain, and ends the exposure.

  When the rear shutter curtain completes traveling, the camera body 10 drives the mirror motor by the motor control circuit 15 to lower the mirror, reads the image signal captured by the image sensor 14, performs predetermined image processing, and performs memory card processing. 22 is written.

  Further, the camera body 10 communicates an LED relighting request to the external flash device 50 by flash communication, and the external flash device 50 relights the LED light emitting unit 93.

  FIG. 4B shows a timing chart of the light emission mode B. The light emission mode B is a mode in which the LED light emitting unit 93 is continuously lit during imaging while the photometric switch SWS is turned on to obtain the AF auxiliary light effect before imaging and the light amount increasing effect during imaging. The flash light emitting unit 92 emits light during imaging.

  When the photometric switch SWS is turned on, the camera body 10 performs normal flash communication with the external flash device 50 and transmits an LED lighting command to the external flash device 50, and the external flash device 50 lights the LED light emitting unit 93.

  When the release switch SWR is turned on, the camera body 10 transmits a flash pre-flash trigger to the external flash device 50 by flash communication immediately before exposure. The external flash device 50 pre-lights the flash light emitting unit 92 while the LED light emitting unit 93 is lit. The camera body 10 performs photometry in synchronization with the pre-flash of the flash light emitting unit 92, and then performs photometry (steady light photometry) with the LED light-emitting unit 93 lit after the pre-light emission ends, and subject brightness by the flash light. The component is calculated, and the shutter speed (exposure time) Tv and the aperture value Av and the light emission amount of the flash main light emission at which the appropriate exposure is achieved in a state where the LED light emitting unit 93 is lit are calculated.

  The camera body 10 drives the mirror motor by the motor control circuit 15 to start mirror up, and the aperture control circuit 17 reduces the aperture of the photographing lens 100 to the calculated aperture value Av and calculates to the external flash device 50. This flash amount is transmitted by flash communication during mirror up. Furthermore, the camera body 10 transmits a main light emission preparation request command to the external flash device 50 by flash communication immediately before shutter control.

  When the mirror up is completed, the camera body 10 causes the shutter control circuit 18 to start running the shutter front curtain and causes the image sensor 14 to start imaging. The camera body 10 outputs an X contact signal to the external flash device 50 when the shutter front curtain completes traveling. The external flash device 50 performs main light emission by the flash light emitting unit 92 by the main light emission amount in synchronization with the X contact signal. When the shutter speed (exposure time) Tv has elapsed, the camera body 10 causes the shutter control circuit 18 to run the shutter rear curtain, and ends the exposure.

  When the rear shutter curtain completes traveling, the camera body 10 drives the mirror motor by the motor control circuit 15 to lower the mirror, reads the image signal captured by the image sensor 14, performs predetermined image processing, and performs memory card processing. 22 is written.

  The camera body 10 communicates an LED lighting request command to the external flash device 50 by flash communication, and the external flash device 50 continues lighting the LED light emitting unit 93. The camera body 10 continues to turn on the LED light emitting unit 93 until the photometric switch SWS is turned off.

  FIG. 4C shows a timing chart of the light emission mode C. The light emission mode C is a mode in which the LED light emitting unit 93 is turned on immediately before exposure when the release switch SWR is turned on, and is continuously turned on from the exposure to the end of the exposure, and the catch light effect and the light intensity increase effect are obtained by the LED light.

  When the photometric switch SWS is turned on, the camera body 10 normally performs flash communication with the external flash device 50, but this communication content does not include a command related to the lighting of the LED light emitting unit 93.

  When the release switch SWR is turned on, the camera body 10 transmits an LED lighting command and a flash pre-flash trigger to the external flash device 50 by flash communication immediately before exposure. The external flash device 50 turns on the LED light emitting unit 93 and pre-flashes the flash light emitting unit 92. The camera body 10 performs photometry in synchronization with the pre-emission of the flash light emitting unit 92, and performs photometry (steady light photometry) in a state where the LED light emitting unit 93 is lit after the pre-emission is finished. Is calculated, and the shutter speed (exposure time) Tv and aperture value Av at which proper exposure is achieved in a state where the LED light emitting unit 93 is lit, and the flash main light emission amount are calculated.

  Then, the camera body 10 transmits the calculated main light emission amount to the external flash device 50 by flash communication during mirror-up, drives the mirror motor by the motor control circuit 15 and starts mirror-up, and shoots by the aperture control circuit 17. The aperture of the lens 100 is reduced to the calculated aperture value Av. Furthermore, the camera body 10 transmits a main light emission preparation request command to the external flash device 50 by flash communication immediately before shutter control.

  When the mirror up is completed, the camera body 10 causes the shutter control circuit 18 to start running the shutter front curtain and causes the image sensor 14 to start imaging. The camera body 10 outputs an X contact signal to the external flash device 50 when the shutter front curtain completes traveling. The external flash device 50 causes the flash light emitting unit 92 to perform main light emission based on the main light emission amount in synchronization with the X contact signal. When the shutter speed (exposure time) Tv has elapsed, the camera body 10 causes the shutter control circuit 18 to run the shutter rear curtain, and ends the exposure.

  When the rear shutter curtain completes traveling, the camera body 10 drives the mirror motor by the motor control circuit 15 to lower the mirror, reads the image signal captured by the image sensor 14, performs predetermined image processing, and performs memory card processing. 22 is written.

  Thereafter, the camera body 10 communicates an LED turn-off request to the external flash device 50 by flash communication. The external flash device 50 turns off the LED light emitting unit 93 in response to the LED turn-off request command communication.

  FIG. 4D shows a timing chart of the light emission mode D. The light emission mode D is a mode in which the LED light emitting unit 93 is pre-lighted and lighted during exposure, and the catch light effect and the light amount increase effect are obtained by the LED light.

  When the photometric switch SWS is turned on, the camera body 10 normally performs flash communication with the external flash device 50, but the communication content does not include a command related to the lighting of the LED light emitting unit 93.

  When the release switch SWR is turned on, the camera body 10 transmits the LED pre-flash and the flash pre-flash trigger (1) to the external flash device 50 by flash communication immediately before exposure. The external flash device 50 pre-lights the LED light emitting unit 93 and pre-lights the flash light emitting unit 92. The camera body 10 performs photometry in synchronization with the pre-emission of the flash emission unit 92, and after the pre-emission ends, the LED emission unit 93 turns off and then performs photometry (steady light photometry). The components are calculated, and the exposure value (shutter speed (exposure time) Tv and aperture value Av) for proper exposure, the light emission amount of the LED main light emission, and the light emission amount of the flash main light emission are calculated.

  The camera body 10 starts the mirror up by driving the mirror motor by the motor control circuit 15, narrows down the aperture of the photographing lens 100 to the calculated aperture value Av by the aperture control circuit 17, and calculates to the external flash device 50. The emitted light amount of the main LED light emission and the emitted light amount of the main flash light are transmitted by flash communication during mirror up.

  When the mirror up is completed, the camera body 10 transmits an LED and flash main light emission preparation request command to the external flash device 50 by flash communication immediately before shutter control. Upon receiving this command, the external flash device 50 turns on the LED light emitting unit 93 with the amount of light received by communication. Other operations after the mirror up is completed are the same as those in the light emission mode C.

  FIG. 4E shows a timing chart of the light emission mode E. The light emission mode E is a mode in which the LED light emitting unit 93 is turned on during exposure to obtain a catchlight effect and a light amount increase effect during photographing. In the light emission mode E, the flash light emitting unit 92 and the LED light emitting unit 93 are pre-lighted independently, and the pre-lighting is performed to measure light at the time of pre-lighting and pre-lighting. Different from the light emission mode D in which pre-flash is used for photometry.

  When the photometric switch SWS is turned on, the camera body 10 normally performs flash communication with the external flash device 50, but does not include a command related to the lighting of the LED light emitting unit 93.

  When the release switch SWR is turned on, the camera body 10 transmits an LED pre-lighting and flash pre-emission trigger (2) to the external flash device 50 by flash communication immediately before exposure. The external flash device 50 pre-lights the LED light emitting unit 93 for a predetermined time, and the camera body 10 performs photometry during the pre-lighting. When the external flash device 50 turns off the LED light-emitting unit 93, the external flash device 50 causes the flash light-emitting unit 92 to pre-emit in synchronization with the turn-off. The camera body 10 performs photometry in synchronization with the pre-emission of the flash light emitting unit 92, and performs photometry (steady light photometry) after the flash light emitting unit 92 is turned off. With the above photometric operation, it is possible to accurately obtain the subject luminance only from the ambient light, the subject luminance component due to the LED light, and the subject luminance component due to the flash light. The camera body 10 calculates an exposure value (shutter speed Tv and aperture value Av) for proper exposure, a light emission amount of the main LED light emission, and a light emission amount of the flash main light emission.

  The camera body 10 starts the mirror up by driving the mirror motor by the motor control circuit 15, narrows down the aperture of the photographing lens 100 to the calculated aperture value Av by the aperture control circuit 17, and calculates to the external flash device 50. The main LED emission amount and the flash main emission amount are transmitted by flash communication during mirror up.

  When the mirror up is completed, the camera body 10 transmits an LED and a flash main light emission preparation request command to the external flash device 50 by flash communication immediately before shutter control. In response to this command, the external flash device 50 turns on the LED light emitting unit 93 with the light emission amount (light emission intensity) received through communication. Other operations after the mirror up is completed are the same as those in the light emission modes C and D.

  The flash photographing operation in the camera system in which the external flash device 50 and the photographing lens 100 are attached to the camera body 10 will be described in detail with reference to FIGS. FIG. 6 is a flowchart regarding the main process of the photographing operation of the camera body 10. The following processes are executed by the linkage of the CPU 13, the light emission control unit 13b, the light emission mode selection unit 13c, the photometry unit 13d, and the calculation unit 13e under the overall control of the CPU 13. When the battery 1 is loaded in the camera body 10, the CPU 13 performs a reset operation and then enters a main process. When entering the main process, the CPU 13 first initializes each port (S100), executes serial communication with the EEPROM 60, reads the initial data of the EEPROM 60 (S101), and checks whether the main switch SWM is on. (S102).

  When the main switch SWM is not turned on (S102: NO), the CPU 13 executes a main switch off process (S106) and turns off the display of the display element 5 (S107). In the main switch-off process, the boosting and constant voltage supply operations of the regulator 2 are stopped, and charging is stopped if the built-in flash is being charged. Then, the interruption of the main switch SWM is permitted (S108), and the process shifts to the sleep state (S109). In this sleep state, since the interrupt of the main switch SWM is permitted, an interrupt is generated when the main switch SWM is turned on again, and the process returns to step S100 to start the main process.

  When the main switch SWM is on (S102: YES), the CPU 13 (light emission mode selection unit 13c) determines the light emission modes (A) to (E) and various modes based on the switch states of the information setting switch group 9. A function or the like is selected (S103), and information relating to photographing such as the selected light emission modes (A) to (E) and each mode and function is displayed on the display element 5 (S104).

  Subsequently, the CPU 13 checks whether or not the photometric switch SWS or the release switch SWR is turned on (S110), and executes a main switch on process when neither the photometric switch SWS nor the release switch SWR is turned on. (S110: NO, S116). In the main switch-on process, if the built-in flash is not being charged, a process such as stopping the operation of the regulator 2 is performed. Then, the CPU 13 starts a timer A of 125 ms (S117), permits interruption of the timer A (S118), and shifts to a sleep state (S119). In the sleep state of step S119, since the interrupt of timer A is permitted, an interrupt occurs when timer A expires, and the process is continued from step S102. Therefore, in a state where the main switch SWM is on and both the photometry switch SWS and the release switch SWR are off, the processes of steps S102 to S110 and steps S116 to S119 are executed once every 125 ms.

  When the CPU 13 determines in step S110 that the photometry switch SWS or the release switch SWR is on (S110: YES), the CPU 13 executes lens communication with the photographing lens 100 via the lens communication interface 7. Then, the lens information is read (S112). The lens information read in step S112 includes open F value information Avmin, photometric correction information Avc, focal length information f, shooting distance information Dv, and the like. The open F value information Avmin, photometric correction information Avc, and shooting distance information Dv are apex display values.

  Subsequently, the CPU 13 (light emission control unit 13b) performs flash communication with the external flash device 50 connected to the camera body 10 via the flash connection terminal group 4 (S113). By this flash communication, FC information (flash information) is input from the external flash device 50, while CF information (flash control information) is output to the external flash device 50. The FC information includes information such as the function of the flash, the guide number, the state of charge, the presence / absence of the LED light emitting unit, the irradiation angle, the presence / absence of bounce, and the CF information includes the light emission mode and light emission corresponding to the selected light emission mode. There are quantity and emission command and so on. When the light emission mode A or B is selected, an LED lighting command is included in the CF information. That is, when the light emission mode A or B is selected, the external flash device 50 that has received the LED lighting command lights the LED light emitting unit 93 (continuous light emission). When the light emission modes C to E are selected, since the LED lighting command is not included in the CF information, the external flash device 50 does not light the LED light emitting unit 93.

  The CPU 13 inputs the video signal of the subject image from the phase difference AF circuit 16 and calculates the defocus amount, and drives the AF motor (not shown) via the motor control circuit 15 to adjust the focus of the photographing lens 100. AF processing for moving the lens group (not shown) to the in-focus position is executed (S114). After executing the AF process, the CPU 13 inputs a photometry signal corresponding to the output of the split photometry sensor 20 from the photometry circuit 19, and based on the input photometry signal, shooting mode information, lens information (open F value information Avmin), and the like. AE processing for calculating an appropriate shutter speed Tv and aperture value Av is executed (S115).

  The CPU 13 checks whether or not the release switch SWR is turned on (S120). When the release switch SWR is not turned on (S120: NO), the CPU 13 returns to step S102. When the release switch SWR is ON (S120: YES), the CPU 13 (light emission control unit 13b) communicates CF information to the external flash device 50 by flash communication immediately before exposure (S121).

In the flash communication immediately before exposure, a command corresponding to the selected light emission modes A to E is transmitted to the external flash device 50 as CF information. The commands corresponding to the light emission modes A to E are as follows.
When the light emission mode A is selected, the LED extinction and the flash pre-flash trigger are communicated.
When the flash mode B is selected, a flash pre-flash trigger is communicated.
When the light emission mode C is selected, the LED pre-light emission (continuous lighting) and the flash pre-light emission trigger are communicated.
When the light emission mode D is selected, LED pre-flash and flash pre-flash (1) triggers are communicated.
When the light emission mode E is selected, LED pre-flash and flash pre-flash (2) triggers are communicated.

  The external flash device 50 that has received the above CF information performs a pre-flash operation as shown in FIGS. 4A to 4E in accordance with the received command. An end signal is communicated to the camera body 10.

  On the other hand, the CPU 13 (photometric unit 13d) synchronizes with the operation start signal and the operation end signal received from the external flash device 50, and performs the divided photometric sensor 20 by the photometric operation according to the selected light emission modes (A) to (E). Then, the photometric circuit 19 is operated to input a photometric value (subject luminance) (S122). The CPU 13 (calculation unit 13e), based on the input photometric value, the proper exposure value at the time of imaging, the main light emission amount and the light emission amount of the flash light emission unit 92 and the LED light emission unit 93 according to the selected light emission modes A to E. The ratio is calculated (S123).

  The CPU 13 drives a mirror motor (not shown) via the motor control circuit 15 to raise the mirror (not shown), and the aperture (not shown) of the taking lens 100 is set via the aperture control circuit 17. A mirror-up / aperture control process is performed to narrow down the aperture value (S124).

  The CPU 13 (light emission control unit 13b) performs flash communication processing during mirror up during mirror up (S125), and transmits the flash main light emission amount and LED main light emission amount calculated in step S123 to the external flash device 50.

In the mirror-up flash communication, the following data corresponding to the selected light emission modes A to E is transmitted to the external flash device 50.
When the light emission modes A and B are selected, the main light emission amount of the flash light emitting unit 92 is communicated.
When the light emission modes C to E are selected, the main light emission amount (lighting intensity) of the LED light emission unit 93 and the main light emission amount of the flash light emission unit 92 are communicated.

  Subsequently, the CPU 13 (light emission control unit 13b) sends a main light emission preparation request for the LED light emission unit 93 and the flash light emission unit 92 corresponding to the selected light emission modes A to E to the external flash device 50 immediately before starting the shutter control. Communication is performed by flash communication immediately before shutter control (S126).

In the flash communication immediately before the shutter control, the following data corresponding to the selected light emission modes A to E is transmitted to the external flash device 50.
When the light emission modes A to C are selected, the main light emission preparation request command of the flash light emission unit 92 is communicated.
When the light emission mode D or E is selected, the lighting preparation request of the LED light emitting unit 93 and the main light emission preparation request of the flash light emitting unit 92 are communicated.
When the external flash device 50 receives the lighting preparation request for the LED light emitting unit 93, the external flash device 50 lights the LED light emitting unit 93 with the main light emission amount (lighting intensity) received first.

  The CPU 13 starts an imaging operation (exposure process) (S127). In the imaging operation, the CPU 13 causes the shutter curtain to travel through the shutter control circuit 18 and causes the image sensor 14 to start the imaging operation. During the imaging operation, the external flash device 50 performs the main light emission (continuous lighting) with the light emission amount and the light emission mode according to the set light emission amount ratio according to the selected light emission modes A to E. In response to the X contact signal, the flash light emitting unit 92 performs main light emission.

  When the imaging operation is finished, the CPU 13 drives a mirror motor (not shown) via the motor control circuit 15 to lower the mirror and performs shutter charge via the shutter charge motor (S128). The image signal is read out, subjected to predetermined image signal processing, recorded in the memory card 22 (S129), and the light emission control unit 13b performs flash communication with the external flash device 50 and returns to step S102 (S130, S102). . The order of steps S128, S129, and S130 does not matter.

  In the flash communication in step S131, when the light emission mode A is selected, an LED relighting request is communicated, and the external light emitting device 50 is caused to light the LED light emitting unit 93. When the light emission mode B is selected, the LED on / off request is not communicated. When the light emission modes C to E are selected, the LED turn-off request is communicated to the external flash device 50, and the LED light-emitting unit 93 is turned off by the external flash device 50.

  In the above embodiment, the main flash of the flash light emitting unit 92 is set to the front curtain sync setting, but other settings such as a rear curtain sync setting may be used.

  FIG. 6 shows a flowchart relating to the flash emission amount calculation processing executed in step S123 when the emission mode B is selected. This process is an operation by the CPU 13 and the calculation unit 13e. First, the CPU 13 (calculation unit 13e) obtains a photometric value obtained by pre-flashing the flash light emitting unit 92 with the LED light emitting unit 93 lit (continuous light emission) and a state in which the flash light emitting unit 92 is not pre-flashed. A flash pre-flash photometric value obtained by pre-flashing the flash light emitting unit 92 is calculated from the measured photometric value (S201).

  Subsequently, the CPU 13 calculates the main flash emission amount at the time of imaging from the calculated flash pre-emission photometric value, substitutes it in the flash emission magnification MvF, and returns (S203: RET). The flash emission magnification MvF is a magnification that determines how many times the pre-emission amount when the flash emission unit 92 pre-emits is emitted.

  FIG. 7 shows a flowchart related to the LED light emission amount calculation process executed in the main light emission amount calculation process in step S123 when any one of the light emission modes B to E is selected. This process is an operation by the CPU 13 and the calculation unit 13e.

  The CPU 13 (calculating unit 13e) substitutes a value obtained by further subtracting 1 Ev from the difference between the steady light luminance and the exposure value (Tv + Av) for flash light emission photographing into the LED light emission magnification MvL ′ (S211). When only the difference between the steady light brightness and the flash light exposure value (Tv + Av) is obtained, only the light emission component of the LED light emission unit 93 provides appropriate exposure, and the flash light emission by the flash light emission unit 92 becomes unnecessary, and the flash effect is achieved. Since it is not obtained, the light emission amount of the LED light emitting unit 93 is subtracted by 1 Ev, and the light emission amount of the flash light emitting unit 92 is increased by 1 Ev. The minimum value of the LED light emission magnification MvL ′ is 0 as the lower limit (S213). Then, the CPU 13 assigns the value obtained by adding the LED light emission magnification MvL ′ to the current light emission amount (LED pre-light emission amount) to the LED light emission magnification MvL and returns (S215, RET).

  The difference between the steady light luminance and the exposure value for flash photography (Tv + Av) is added to the current LED light emission amount. Conversely, the difference between the steady light luminance and the exposure value for LED lighting photography (Tv + Av) is used as the flash light emission amount. You may add.

  FIG. 8 shows a flowchart regarding the flash light emission amount calculation process which is a part of the main light emission amount calculation process of step S123 when the light emission mode E is selected. This process is an operation controlled by the CPU 13, the photometry unit 13d, and the calculation unit 13e. The pre-emission amount and the pre-lighting amount of the flash emission unit 92 and the LED emission unit 93 of the external flash device 50 are measured to measure the main emission amount. Calculate the ratio.

The CPU 13 performs photometry when the LED light emission unit 93 is pre-lit, calculates an LED pre-light measurement value (S301), and substitutes the calculated LED light emission amount into the LED light emission magnification MvL (S303).
The CPU 13 performs photometry when the flash light emitting unit 92 pre-emits, calculates a pre-emission photometric value (S305), and substitutes the calculated flash pre-emission amount for the flash emission magnification MvF (S307).

  The CPU 13 checks whether or not the shooting distance input unit 25 has input shooting distance information (S309). If the shooting distance information has been input (S309: YES), the CPU 13 determines whether or not the flash light emitting unit 92 is in accordance with the shooting distance information. The light emission amount of the LED light emitting unit 93 is set and the process returns (S311, RET). In the present embodiment, the light emission amounts of the flash light emitting unit 92 and the LED light emitting unit 93 are set by the ratio (MvF: MvL) of the light emission magnification MvF of the flash light emitting unit 92 and the light emission magnification MvL of the LED light emitting unit 93. When the shooting distance is 1 m or less, the light emission ratio is set to MvF: MvL = 8: 1, and when the shooting distance is 5.6 m or more, MvF: MvL = 2: 1 is set. If it exceeds 1 m and less than 5.6 m, it is set continuously or stepwise between MvF: MvL = 8: 1 and 2: 1 according to the shooting distance.

  If the CPU 13 determines that there is no shooting distance information in the shooting distance information check in step S309 (S309: NO), the CPU 13 sets the light emission amounts of the flash light emitting unit 92 and the LED light emitting unit 93 to a fixed value of MvF: MvL = 2: 1. And return (S313, RET).

  In the present embodiment, the ratio of the light emission magnification (MvF: MvL), which is the light emission amount of the flash light emitting unit 92 and the LED light emitting unit 93, is set so as to be suitable for human photography. If the shooting distance is 5.6m or more, set it to be suitable for group photos, and if the shooting distance is more than 1m and less than 5.6m, it is suitable for bust-up or group photos of several people Is set according to the shooting distance.

  In addition, when the shooting mode is catch light, since the catch light shooting assumes a person shooting, if there are many LED light components at a short distance, the influence of the LED light that directly illuminates the person's face becomes too large and the shadow is shadowed. Therefore, the light emission amount ratio of the LED light-emitting unit 93 is lowered and adjusted so as to produce a shadow. Although the light emission magnification ratio of the present embodiment is set according to the shooting distance, it may be set according to the shooting magnification.

  FIG. 9 shows a flowchart relating to the pre-flash photometric value calculation processing. This process is an operation controlled by the CPU 13, the photometry unit 13d, and the calculation unit 13e, and is the details of the pre-emission photometric value calculation process in steps S301 and S305. The pre-emission brightness of the flash emission unit 92 alone, LED The pre-lighting luminance of the light emitting unit 93 alone and the subject luminance of only steady light (pre-light emission and no pre-lighting state) are calculated.

  When the pre-emission photometric value calculation process is started, first, in order to measure the pre-emission amount by each of the N-divided photometric sensors 20, the photometric element number n corresponding to the number of each photometric element (n) is an initial value. 1 is substituted (S401). n is an integer of 1 to 9. It is checked whether or not the photometric element number n is N or less (S403), that is, whether or not the pre-flash photometric values have been calculated for all N photometric elements 20 (n). If n is less than or equal to N (S403: YES), a stationary light photometric value is obtained from the nth (photometric element number n) photometric element (n) and substituted for the nth luminance Bv (n) (S405). ), The nth pre-emission value (n) is acquired and substituted for the pre-emission value Bpre (n) (S407).

From the luminance Bv (n) and the pre-emission value Bpre (n), the pre-emission luminance Bvp (n) is expressed by the following formula:
Bvp (n) = ln (2 ^{Bpre (n)} −2 ^{Bv (n)} ) / ln 2
(S409).
In step S409, the steady light (environmental light) component is removed from the pre-emission photometric component to obtain the pre-emission luminance Bvp (n).

  Next, the photometric element number n is incremented by 1, and the process returns to step S403 (S411, S403), and the main light emission luminance is calculated for the photometric values of N (9) photometric elements 20 (n). When the pre-emission luminance Bvp (n) is calculated based on the photometric values of N (9) photometric elements 20 (n) (S403: NO), the process returns (RET).

FIG. 10 shows a flowchart regarding the flash main light emission amount calculation processing. When the flash main light emission amount calculation process is started, first, it is checked whether or not there is shooting distance information Dv (S501). If there is shooting distance information Dv (S501: YES), it is checked whether there is no bounce (S503). If it is determined that there is no bounce (S503: YES), the reference pre-emission luminance Bvpc when pre-emission is performed on the subject having the reference reflectance is expressed by the following formula:
Bvpc = Ks−Avmin−Dv
(S505).
Here, Avmin is the open F value of the photographic lens, and Ks is a constant obtained by the equation: Ks = Bvps + Dvs. Dvs is a reference distance (apex display value), Bvps is a subject luminance when pre-emission is performed with a pre-emission intensity PreP = 1 on an object having a reference reflectance at the reference distance Dvs, and Bvps-Avmin is The reference pre-emission luminance measured by the split photometry sensor 20 when the subject luminance at the time of pre-emission is Bvps described above.

On the other hand, when there is no shooting distance information (S501: NO), even if there is shooting distance information (S501: YES), when it is not determined that there is no bounce (S503: NO), the reference without using the shooting distance information Dv. Pre-emission luminance Bvpc is calculated (S507, S509). That is, the maximum pre-emission luminance Bvp (n) max is extracted from the pre-emission luminance Bvp (n) (photometry element number n: 1 to 9) of each photometric element 20 (n) of the split photometry sensor 20, and the maximum The photometric element number n of the divided photometric sensor 20 whose luminance difference from the pre-emission luminance Bvp (n) max is within 3 (or 2.5) Ev is stored in the register X (not shown) in the CPU 13 (S507). .
X ← (Bvp (n) −Bvp (n)) <3
This luminance difference is an Apex display Ev value corresponding to the latitude (dynamic range) of the image sensor 14, and is generally 2.5 to 3 Ev. In the silver salt film, the negative film is about 5 Ev and the positive film is about 3 Ev. The pre-emission luminance Bvp and the luminance difference Ev are apex display values.

In step S507, the maximum pre-emission luminance Bvp (x) max and the minimum pre-emission luminance Bvp (x) min are extracted from the pre-emission luminance Bvp (x) corresponding to the photometric element number stored in the register X. Reference pre-emission luminance Bvpc is expressed by the following formula:
Bvpc = (Bvp (x) max + Bvp (x) min) / 2
(S509).
Note that the extracted maximum pre-emission luminance Bvp (x) max and minimum pre-emission luminance Bvp (x) min are within the dynamic range of the image sensor 14 by the process of S507. If there is no minimum pre-emission luminance Bvp (x) min that satisfies the condition in S509, reference pre-emission luminance Bvpc = maximum pre-emission luminance Bvp (x) max.

  Once the reference pre-emission luminance Bvpc is calculated, the reference pre-emission luminance Bvpc is excluded in order to exclude objects with a high reflectance or a distance that is much shorter than the reference distance, subjects with a low reflectance, or objects that are a long distance than the reference distance. Then, the photometric element number n of the divided photometric sensor 20 having a luminance difference within ± 2 Ev is extracted and stored in a Y register (not shown) in the CPU 13 (S511).

  When the photometric element number n is stored in the Y register (S513: YES), the average value of the pre-light emission luminance Bvp (y) corresponding to the photometric element (n) stored in the Y register is obtained, and the average value is obtained. Is stored in the calculated pre-emission luminance (average pre-emission luminance) Bvptyp (S517). When nothing is stored in the Y register (S513: NO), the reference pre-emission luminance Bvpc obtained in step S509 is stored as the calculated pre-emission luminance Bvptyp (S515).

Then, the light emission magnification (light emission amount) Mv is expressed by the formula:
Mv = Tv + Av + Avc-Sv-Bvptyp-Avmin
And return (S519, RET).
Here, Tv is an appropriate shutter speed (where Tv = Tvx when the shutter speed Tv is less than the flash synchronization speed Tvx), Av is an appropriate aperture value, Avc is a photometric correction value, Sv is ISO sensitivity, and Avmin is a minimum aperture value. These are apex values.

  The calculated light emission magnification Mv is communicated from the camera body 10 to the external flash device 50 through mirror-up flash communication. When the external flash 50 receives the light emission magnification Mv, the external flash 50 performs main light emission at Mv times the pre-light emission amount.

  Although the embodiment in which the photographing apparatus of the present invention is applied to a digital single-lens reflex camera has been described above, the present invention can also be applied to a mirrorless digital single-lens reflex camera and a compact digital camera. Since these cameras do not have a mirror, flash communication immediately before exposure, flash communication during mirror up, and flash communication immediately before shutter control are sequentially executed by time management or the like.

As described above, in the present embodiment, the flash light emitting unit 92 and the LED light emitting unit 93 are provided in the external flash device 50 that is separate from the camera body 10, but either or both of the flash light emitting unit 92 and the LED light emitting unit 93 are provided. You may provide in the camera body 10. FIG. When the flash light emitting unit 92 and the LED light emitting unit 93 are provided in the camera body, the flash light emitting unit can be provided so as to be able to protrude from the camera body, and the LED light emitting unit can be provided on the front surface of the camera body.
In this embodiment, the LED is used as the light source of the continuous light emitting unit capable of continuous light emission. However, if the light source can be turned on / off continuously in a short time (for example, within several milliseconds to several tens of milliseconds), the LED is used. It is not limited.

1 51 Battery 2 Regulator 3 53 73 Capacitor 4 Flash connection terminal (C, R, Q, X, G)
5 Display element 6 60 EEPROM
7 Lens communication interface 8 Flash communication interface (communication unit)
9 63 Information setting switch group 10 Camera body 13 CPU (recording unit)
13a RAM
13b Light emission control part 13c Light emission mode selection part 13d Photometry part 13e Calculation part 14 Image sensor (imaging part)
15 Motor control circuit 16 AF circuit 17 Aperture control circuit 18 Shutter control circuit 19 Photometric circuit (photometric unit)
20 split photometry sensor (photometry unit)
20 (n) Photometric element 22 Memory card (recording unit)
25 Shooting distance input unit 26 Focal length input unit 27 Accessory shoe 50 External flash device 52 Schottky diode 54 Regulator 55 Light emitting unit 56 Camera connection terminal (C, R, Q, X, G)
57 wireless light receiving element 58 wireless light receiving circuit 59 camera communication interface (communication unit)
61 Zoom motor 62 Motor drive circuit 65 Flash CPU
66 Booster circuit 69 Charge detection circuit 70 LED drive circuit 71 LED (continuous light emitting unit)
72 LCD display 74 76 Resistor 75 Comparator 77 30 V generation circuit 78 Level shift circuit 79 Main capacitor 80 Trigger circuit 81 Coil 82 Xenon (Xe) tube (flash light emitting section)
83 IGBT
85 Light emission amount detection photometric element 91 Main unit 92 Flash light emitting unit 93 LED light emitting unit (continuous light emitting unit)
94 Bounce mechanism 95 Mounting part SWS Photometric switch (first switch)
SWR release switch (second switch)

Claims (16)

An imaging unit for imaging a subject image formed by the imaging optical system;
A recording unit for recording an image signal captured by the imaging unit;
A flash unit capable of pre-flash and main flash;
A continuous light emitting part capable of pre-light emission and continuous light emission;
The flash unit and the continuous light-emitting unit are pre-lighted before imaging, in which the recording unit records the image signal from the imaging unit as a stored image, and then the flash light-emitting unit is caused to perform main light emission during imaging, and the continuous light-emitting unit. A light emission control unit for continuously emitting light;
A light emission mode selection unit that selects one light emission mode from a plurality of light emission modes combining the pre-light emission and main light emission of the flash light emission unit and the pre-light emission and continuous light emission of the continuous light emission unit;
An imaging apparatus comprising: The imaging device according to claim 1, wherein, before the imaging, when one or both of the flash light emitting unit and the continuous light emitting unit pre-emit, or when both are extinguished,
An imaging apparatus, further comprising: an arithmetic unit that calculates an exposure value in the imaging, a main light emission amount of the flash light emission unit, and a continuous light emission amount of the continuous light emission unit based on the subject luminance measured by the photometry unit.   The imaging device according to claim 1, further comprising a first switch that operates the light emission control unit and a second switch that causes the imaging unit to capture an image.   4. The photographing device according to claim 3, wherein the light emission mode is configured such that the continuous light emission unit starts continuous light emission in response to an ON operation of the first switch and maintains continuous light emission until the end of imaging. In response to an ON operation, the flash light emitting unit performs pre-light emission and the photometry unit performs photometry, and when the flash light emitting unit finishes pre-light emission, the photometry unit performs photometry, and then the imaging unit starts imaging. And a photographing apparatus including a light emission mode in which the flash light emitting unit performs main light emission during the imaging.   4. The photographing apparatus according to claim 3, wherein the light emission mode is selected when the continuous light emitting unit emits light continuously, the photometric unit measures light, and the continuous light emitting unit is turned off in response to an ON operation of the second switch. The flash light-emitting unit pre-flashes, the photo-metering unit performs photometry, and when the flash light-emitting unit finishes pre-flash, the photo-metering unit performs photometry, and then the continuous light-emitting unit starts continuous light emission and the continuous light emission An imaging apparatus including a light emission mode in which the imaging unit starts imaging and the flash light emitting unit performs main light emission during the imaging.   4. The photographing apparatus according to claim 3, wherein in the light emission mode, the continuous light emitting unit starts continuous light emission in response to an ON operation of the second switch, the flash light emitting unit performs pre-light emission, and the photometric unit performs photometry. When the flash light emitting unit finishes pre-flash, the light metering unit performs photometry, and then the imaging unit starts imaging in a state where the continuous light emitting unit continuously emits light. An image capturing apparatus including a light emission mode in which the main light is emitted.   4. The photographing device according to claim 3, wherein the flash mode is configured such that the continuous light emitting unit continuously emits light and the continuous light emitting unit emits light continuously in response to an ON operation of the second switch. Is pre-flashed, the metering unit performs metering, the flash metering unit finishes emitting light and the continuous light emitting unit is turned off, the metering unit performs metering, and then the continuous light emitting unit starts continuous light emission and continues. An imaging apparatus including a light emission mode in which the imaging unit starts imaging in a state where light is emitted, and the flash light emitting unit performs main light emission during the imaging.   4. The photographing device according to claim 3, wherein in the light emission mode, the continuous light emitting unit starts continuous light emission in response to an on operation of the first switch, and the continuous light emitting unit in response to an on operation of the second switch. Is turned off and the flash metering unit performs pre-emission when the flash metering unit performs pre-emission, and the flash metering unit performs metering when the flash unit finishes pre-emission, and then the imaging unit starts imaging, A photographing apparatus including a light emission mode in which the flash light emitting unit performs main light emission during the imaging.   9. The photographing apparatus according to claim 2, wherein the calculation unit is configured to determine an appropriate exposure value in the imaging, a main light emission amount of the flash light emitting unit, and a continuous light based on a photometric value measured by the photometric unit. An imaging device that calculates the amount of light emitted from the light emitting unit.   10. The photographing apparatus according to claim 2, further comprising a photographing distance input unit that inputs a photographing distance of the photographing optical system, wherein the calculation unit is responsive to a photographing distance input by the photographing distance input unit. An imaging device that sets a ratio between the main light emission amount of the flash light emitting unit and the light emission amount of the continuous light emitting unit that continuously emits light during the imaging.   11. The photographing apparatus according to claim 3, further comprising a focal length input unit that inputs a focal length of a photographing optical system, wherein the calculation unit includes the photographing distance input by the photographing distance input unit and the photographing distance. Shooting that sets the ratio of the main light emission amount of the flash light emission unit in the main light emission and the light emission amount of continuous light emission during the imaging of the continuous light emission unit according to the shooting magnification determined by the focal length input by the focal length input unit apparatus.   12. The photographing apparatus according to claim 3, wherein the flash device includes a bounce mechanism that changes a light emitting direction of the flash light emitting unit, and the light metering unit is configured to measure a plurality of subject areas. A light metering sensor, and when the light emission control unit causes the flash light emitting unit and the continuous light emitting unit to pre-emit, and the flash light emitting unit is bounced, the calculation unit is configured to perform photometry of a plurality of divided photometric sensors. A photographing device that extracts a photometric value having a photometric value difference less than a predetermined value from the values and calculates an average value of the photometric values as subject luminance.   13. The photographing apparatus according to claim 1, wherein the light emission mode selection unit includes an operation unit that selects any one of the light emission modes.   14. The photographing apparatus according to claim 1, wherein the flash light emitting unit and the continuous light emitting unit are mounted on an external flash device that can be attached to and detached from the camera body. An imaging device having a communication unit for sending and receiving flash information. Connectable to a camera body having an imaging unit that captures a subject image formed by the imaging optical system, a recording unit that records an image signal captured by the imaging unit, and a communication unit that communicates with an external flash device A flash device,
A flash unit capable of pre-flash and main flash;
A continuous light emitting part capable of pre-light emission and continuous light emission;
A communication unit communicating with the camera body;
Before the imaging in which the recording unit of the camera body records the image signal from the imaging unit by communication between the communication unit and the communication unit of the camera body, the pre-emission of the flash emission unit and the continuous emission unit continuously A light emission control unit that performs on / off control of light emission, and then performs on / off control of continuous light emission of the continuous light emission unit and performs flash emission of the flash light emission unit during imaging thereafter;
A flash device characterized by comprising: A camera body including an imaging unit that captures a subject image formed by the imaging optical system, a recording unit that records an image signal captured by the imaging unit, and flash light emission that is detachably formed on the camera body A flash photographing system including an external flash device including a continuous light emitting unit capable of continuous light emission,
The camera body causes the flash light emitting unit and the continuous light emitting unit to pre-emit each of the image signals from the image pickup unit before the image recording is recorded by the recording unit, and then causes the flash light emitting unit to perform main light emission during the image pickup. A light emission control unit for continuously emitting light;
A light emission mode selection unit that selects from among a plurality of light emission modes that combine pre-light emission and main light emission of the external flash device and main light emission and pre-light emission and continuous light emission of the continuous light emission unit;
A flash photography system characterized by comprising:

Images