JP5224757B2 - Strobe device, imaging device, and camera system - Google Patents

Description

  The present invention relates to a strobe device and an image pickup apparatus including the strobe device.

  When strobe light emission, particularly continuous light emission, the light emitting portion (Fresnel lens) is heated (heated) due to light emission and may be damaged.

As a countermeasure against the temperature rise, Patent Document 1 discloses a technique for displaying a warning when the temperature of the light emitting unit rises. Patent Document 2 discloses a technique for manipulating the charging time so as not to perform continuous light emission, and Patent Document 3 discloses a technique for prohibiting light emission.
US005640070A Japanese Patent Laid-Open No. 10-206941 JP 2001-066665 A

  However, in the technology for giving a warning when the temperature of the light emitting unit rises, it is left up to the user to stop the light emission, and there is a risk of damaging the light emitting unit, such as accidentally damaging the light emitting unit. Further, in the technology for prohibiting the light emission due to the temperature rise of the light emitting unit, there is a possibility that the user cannot miss a photo opportunity because the image cannot be taken when the flash is actually taken.

(Object of invention)
An object of the present invention is to provide a stroboscopic device , an imaging device, and a camera system that can avoid missing a photo opportunity while suppressing damage to a light emitting unit due to heat generation.

In order to achieve the above object, a strobe device according to the present invention is a strobe device capable of changing an irradiation angle of a light emitting unit, an irradiation angle setting means for setting an irradiation angle of the light emitting unit, If a detection means for detecting information about heat generation, information about the heating of the light emitting portion reaches the prescribed heating area, without changing the irradiation angle before Symbol emitting portion, light emission of the light emitting portion in accordance with the irradiation angle And a control means for changing a value that can be set as a quantity.

In order to achieve the above object, an imaging apparatus according to the present invention is an imaging apparatus capable of changing an irradiation angle of a light emitting unit, and sets the irradiation angle of the light emitting unit based on a focal length of an imaging lens. Irradiation angle setting means, detection means for detecting information related to heat generation of the light emitting section, and information related to heat generation of the light emitting section reach a prescribed heat generation area, without changing the irradiation angle of the light emitting section. And a control unit that changes a value that can be set as the light emission amount in accordance with a corner .
In order to achieve the above object, a camera system according to the present invention is a camera system including a strobe device capable of changing an irradiation angle of a light emitting unit, and an imaging device to which the strobe device is attached, An irradiation angle setting unit that sets an irradiation angle of the light emitting unit based on a focal length of an imaging lens of the imaging device, a detection unit that detects information about heat generation of the light emitting unit, and information about heat generation of the light emitting unit are defined. A light emission control means for restricting light emission when the heat generation area is reached, and the light emission control means does not change the irradiation angle of the light emitting unit when the light emission is restricted, according to the irradiation angle. And a control unit that changes a value that can be set as the light emission amount of the light emitting unit.

According to the present invention, while suppressing the damage to the light emitting portion due to heat generation, Ru can avoid missing a shutter chance.

  The best mode for carrying out the present invention is as shown in the following examples.

  FIG. 1 is a diagram showing a circuit configuration of a strobe device, an image pickup apparatus main body to which the strobe device is detachable, and an image pickup lens according to an embodiment of the present invention.

  First, the circuit configuration of the imaging apparatus (hereinafter, camera body) 100 will be described.

  A focus detection circuit 102, a photometric sensor 103, a shutter control circuit 104, a motor control circuit 105, and a liquid crystal display circuit 106 are connected to the camera microcomputer 101. In addition, the camera microcomputer 101 performs signal transmission with the lens microcomputer 111 disposed in the imaging lens 110 via the lens mount contact group 109. In addition, a signal is transmitted to a flash microcomputer 219 described later with reference to FIG. 2 provided in the flash device 210 via a flash contact group 230.

  The focus detection circuit 102 performs accumulation control and readout control of a focus detection line sensor (not shown) according to a signal from the camera microcomputer 101, and outputs each pixel information to the camera microcomputer 101. The camera microcomputer 101 A / D converts this information and detects the focus adjustment state by the phase difference detection method. Needless to say, the detection of the focus adjustment state is not limited to the phase difference detection method, and a known method may be used. The camera microcomputer 101 performs focus adjustment control of the imaging lens 110 by exchanging signals with the lens microcomputer 111.

  The photometric sensor 103 outputs a luminance signal to the camera microcomputer 101 in both a steady state in which strobe light is not preliminarily emitted toward the subject and a preliminarily emitted state. The camera microcomputer 101 performs A / D conversion on the input luminance signal, and calculates the aperture value and shutter speed for adjusting exposure for shooting, and calculates the light emission amount of the strobe during exposure. The shutter control circuit 104 performs energization control of the shutter front curtain drive magnet MG-1 and the shutter rear curtain drive magnet MG-2 in accordance with a signal from the camera microcomputer 101, travels the front curtain and the rear curtain, and performs an exposure operation. The motor control circuit 105 controls the motor according to a signal from the camera microcomputer 101, thereby performing up / down of the main mirror, shutter charging, and the like.

  SW1 is a switch that is turned on by a first stroke (half-press) operation of a release button (not shown) to start photometry and AF (automatic focus adjustment). SW2 is a switch that is turned on by a second stroke (full press) operation of the release button and starts shutter running, that is, an exposure operation. The camera microcomputer 101 reads the signals of the switches SW1 and SW2 and other switches SW3 such as a single shooting / continuous shooting setting switch, an aperture setting switch, and a shutter speed setting switch.

  The liquid crystal display circuit 106 controls the in-finder display 107 and the external display 108 according to the signal from the camera microcomputer 101, and displays each setting state and the like.

  Next, a circuit configuration in the imaging lens 110 will be described.

  The camera body 100 and the imaging lens 110 are electrically connected to each other via the lens mount contact group 109 as described above. The lens mount contact group 109 includes a contact L0 that is a power contact for the focus drive motor 115 and the aperture drive motor 116 in the imaging lens 110, a power contact L1 for the lens microcomputer 111, and a clock contact L2 for serial data communication. Have Furthermore, a data transmission contact L3 from the camera body 100 to the imaging lens 110 and a data transmission contact L4 from the imaging lens 110 to the camera body 100 are provided. Furthermore, it has a motor ground contact L5 for the motor power supply and a ground contact L6 for the lens microcomputer 111 power supply.

  The lens microcomputer 111 is connected to the camera microcomputer 101 via the lens mount contact 109. Then, the lens microcomputer 111 operates the focus drive motor 115 and the aperture drive motor 116 in accordance with a signal from the camera microcomputer 101 to control the focus adjustment of the imaging lens 110 and the aperture diameter of the aperture device 117.

  Next, a circuit configuration on the strobe device 210 side will be described with reference to FIG.

  In FIG. 2, 201 is a power supply battery. A DC / DC converter 202 boosts the battery voltage to several hundred volts. Reference numeral 203 denotes a main capacitor for accumulating light emission energy. Reference numerals 204 and 205 denote resistors, which divide the voltage of the main capacitor 203 into a predetermined ratio. Reference numeral 206 denotes a coil for limiting the light emission current, and reference numeral 207 denotes a diode for absorbing a counter electromotive voltage generated when light emission is stopped. Reference numeral 208 denotes a diode for flat light emission, 209 denotes a trigger generation circuit, and 210 denotes a light emission control circuit such as an IGBT.

  A data selector 211 selects one of the D0, D1, and D2 terminals according to a combination of two types of inputs from the Y0 and Y1 terminals, and outputs it from the Y terminal. Reference numeral 212 denotes a light emission level control comparator for flat light emission, and reference numeral 213 denotes a light emission amount control comparator for strobe light emission.

  A photometric circuit 214 amplifies a minute current flowing through the second light receiving element 217 and converts the photocurrent into a voltage. Reference numeral 215 denotes an integral photometry circuit for logarithmically compressing the photocurrent flowing through the first light receiving element 218 and compressing and integrating the light emission amount of the xenon tube 216.

  A strobe microcomputer 219 controls the operation of the strobe device 210 as a whole. A power switch 231 switches the power on / off of the strobe device 210.

  Next, each terminal of the flash microcomputer 219 will be described.

  CNT is a terminal for controlling charging of the DC / DC converter 203, AD1 is an A / D conversion terminal for reading a charging voltage, and AD2 is an A / D conversion terminal for reading a battery level. COM2 is a control output terminal corresponding to the ground potential of the power switch 231, OFF is a terminal selected when the strobe device 210 is turned off, and ON is a terminal selected when the strobe device 210 is turned on.

  CLK is a terminal for inputting a synchronous clock for serial communication with the camera body 100, and DO is a terminal for serial output for transferring serial data from the strobe device 210 to the camera body 100 in synchronization with the synchronous clock. DI is a serial data input terminal for the flash device 210 to receive serial data from the camera body 100 in synchronization with the synchronization clock. CHG is a terminal for transmitting whether or not the xenon tube can emit light from the strobe device 210 to the camera body 100, and X is a terminal to which a flash emission command from the camera body 100 is input.

  INT is an integration control output terminal of the integral photometry circuit 215, AD0 is an A / D conversion input terminal for reading an integral voltage indicating the light emission amount from the integral photometry circuit 215, and DA0 is a comparator voltage of the comparators 212 and 213. Is a D / A output terminal for outputting.

  Y0 and Y1 are terminals for outputting the selection state of the data selector 211, and TRIG is a terminal for outputting a light emission trigger signal.

  Reference numeral 220 denotes a zoom control circuit for adjusting an irradiation angle of a light emitting unit 221 described later. When the focus adjustment of the imaging lens 110 is performed, the flash microcomputer 219 receives the serial data from the camera microcomputer 101. The stroboscopic microcomputer 219 determines whether the light emitting unit 221 is moved in the WIDE direction or the TELE direction by using the DIR terminal, moves the light emitting unit 221 in a desired direction by using the MT terminal, and the irradiation angle of the light emitting unit 221 corresponding to the focal length. Make adjustments. Specifically, the irradiation range by the xenon tube 216 is adjusted. Reference numeral 221 denotes a light emitting unit, which diffuses light by a Fresnel lens, as will be described later with reference to FIG. In addition, in this embodiment, a thermometer (not shown) for detecting the temperature is mounted, and information on the heat generation of the light emitting unit 221 is loaded from the AD3 terminal for A / D input, A / D converted, and the temperature is changed. It can be read as a digital value.

  The strobe microcomputer 219 determines whether a predetermined voltage (comparator) is applied to the DA0 terminal in accordance with a predetermined light emission level designated by the camera body 100 or a predetermined light emission level set by a user using a setting member (not shown) of the strobe device 210. Rate voltage).

Next, “1, 0” is output to the Y0 and Y1 terminals of the data selector 211, and the data selector 211 is caused to select the D2 terminal as an input terminal. At this time, since the xenon tube 216 has yet emit light, because the light current of the second light receiving element 217 does not flow almost, the output of the photometric circuit 21 4 is inputted to the inverting input terminal of the comparator 212 is generated do not do. On the other hand, since the output of the comparator 212 is Hi (high level), the light emission control circuit 210 becomes conductive.

  Next, when a light emission trigger signal is output from the TRIG terminal, the trigger generation circuit 209 excites the xenon tube 216 that has generated a high voltage, and light emission is started.

  On the other hand, the flash microcomputer 219 instructs the integration photometry circuit 215 to start integration. The integral photometry circuit 215 starts integration of the logarithmically compressed photoelectric output of the first light receiving element 218 and simultaneously starts a timer (not shown) that counts the light emission time.

  When the light emission starts, the photocurrent from the second light receiving element 217 for controlling the light emission level increases, and the output of the photometry circuit 214 increases. Then, when the output of the photometry circuit 214 becomes higher than a predetermined comparator voltage set to the non-inverting input of the comparator 212, the output of the comparator 212 is inverted to Lo (low level), and the light emission control circuit 210 has the xenon tube 216. Cuts off the emission current. As a result, the discharge loop is interrupted, but a recirculation loop is formed by the diode 208 and the coil 206, and the light emission current gradually decreases after the overshoot due to the delay of the circuit is settled.

  As the light emission current decreases, the light emission level decreases, so the photocurrent of the second light receiving element 217 decreases and the output of the photometry circuit 214 also decreases. When the voltage drops below a predetermined comparator voltage, the output of the comparator 212 is inverted to Hi again, the light emission control circuit 210 is turned on again, a discharge loop of the xenon tube 216 is formed, the light emission current increases, and the light emission level. Will also increase.

  In this way, the comparator 212 repeatedly increases and decreases the light emission level in a short cycle around the predetermined comparator voltage set at the DA0 terminal, and as a result, continues to emit light at the desired substantially constant light emission level. Light emission is controlled.

  When a predetermined light emission time elapses due to the count of the timer described above, the flash microcomputer 219 outputs “0, 0” to the Y0 and Y1 terminals of the data selector 211. As a result, the D0 terminal, that is, the Lo input is selected as the input terminal of the data selector 211, the output is forcibly set to Lo, and the light emission control circuit 210 interrupts the discharge loop of the xenon tube 216. Thereby, the light emission ends.

  At the end of light emission, the flash microcomputer 219 reads the output of the integrated photometry circuit 215 integrating the light emission amount from the AD0 terminal for A / D input and A / D-converts the integrated value, that is, the light emission amount at the time of light emission. It can be read as a digital value.

  Next, the operation during strobe light emission will be described with reference to the flowchart of FIG.

  When the switch SW2 of the camera body 100 shown in FIG. 1 is turned on in step S101 of FIG. 3A, this is transmitted to the flash microcomputer 219 via the camera microcomputer 101, and the flash microcomputer 219 is in step S102. The operation from is started. When the light emission mode is automatic dimming, the amount of light emitted from the camera microcomputer 101 to the flash microcomputer 219 is transmitted by serial communication through the communication S0, S1, and S2 terminals included in the flash contact group 230 before the X signal is changed. Sent. When the transmission is completed, the camera microcomputer 101 changes the X signal at the S4 terminal of the strobe contact group 230 from Hi to Lo. In the manual light emission mode in which the light emission amount is set in advance on the flash device 210 side, the light emission amount is not transmitted and only the level of the X signal is changed.

  In the next step S102, when the strobe microcomputer 219 detects that the S4 terminal of the strobe contact group 230 shown in FIG. 2 is Lo, it performs strobe light emission in synchronization with it. After the end of the strobe light emission, in the next step S103, the heat generation state of the light emitting unit 221 including the Fresnel lens (see FIG. 5), in this embodiment, the temperature rise is A / D using a thermometer (not shown). Read from AD3 terminal for input and A / D convert. Then, the temperature is read as a digital value. If a thermometer is not installed, the heat generation state may be detected by calculating an estimated temperature according to the amount of light emission by a temperature rise simulation or the like.

  In the next step S104, the stroboscopic microcomputer 219 compares the detected temperature with the specified temperature T1, and if it is equal to or lower than the specified temperature T1, the process returns to step S101 and repeats the above processing every time the switch SW2 is pressed. The specified temperature T1 refers to a temperature level at which the light emitting unit 221 is not damaged (dissolved or broken) even if the next light emission is full light emission, which is the maximum light emission amount of the strobe. Here, if the temperature of the light emitting unit after the strobe light emission is higher than the specified temperature T1, the process proceeds to step S105, and a light emission limiting process for suppressing damage to the light emitting unit 221 is performed from the next strobe light emission as described later. That is, in step S105, the light emission amount is adjusted according to the heat generation temperature.

  Hereinafter, details of the light emission limiting process executed in step S105 will be described with reference to the flowchart of FIG.

  In step S201, if the flash mode is the automatic flash mode, the flash microcomputer 219 changes the flash mode to the manual flash mode using a flash operation member (not shown) or forcibly changes to the manual flash mode. In the next step S202, the upper limit of the light emission amount is determined according to the zoom position of the irradiation angle and the current heat generation level.

  Here, the reason that the light emission mode is forcibly changed to the manual light emission mode in step S201 is that the upper limit of the light emission amount is limited in step S202. If the automatic light emission mode is maintained in step S201, the amount of light emission is actually limited in step S202, although the user may think that the optimum light emission amount is automatically obtained. For this reason, there is a high possibility that the amount of emitted light at the time of shooting is insufficient. Therefore, in order to have the user recognize that the light emission amount is limited in step S202, the light emission mode is switched to the manual light emission mode in step S201.

  FIG. 4A shows a light-emitting area where damage to the light emitting unit 221 can be suppressed by ◯, and a non-lightable area by x. Since the temperature rise of the light emitting unit 221 varies greatly depending on the irradiation angle (the position of the xenon tube 216), the light emission amount is changed in accordance with the irradiation angle at that time.

  For example, as shown in FIG. 5, when the irradiation angle is 105 mm, the distance between the xenon tube 216 and the light emitting unit 221 is set to be long. Since the temperature is not transmitted to the light emitting unit 221 so much, the light emission amount can be manually selected from 1/2 to 1/128 of full light emission. On the other hand, when the irradiation angle is 24 mm, the distance between the xenon tube 216 and the light emitting unit 221 is set to be close. Since it is very close to the light emitting unit 221, only 1/128 of the full light emission amount can be selected manually.

In step S102, after performing strobe light emission with an irradiation angle of 35 mm and half the full light emission amount, it was detected in steps S103 and S104 that the heat generation of the light emitting unit 221 was higher than the specified temperature T1. A case will be described as an example. In the next step S105, the light emission mode is forcibly changed to manual light emission, and the upper limit of the light emission amount is set to 1/32 of the full light emission amount. In the previous step S102, the light emission amount was set to ½ of the full light emission amount. Therefore, here, the light emission amount is forcibly set to 1/32 of the full light emission amount. If the light emission amount is equal to or less than this light emission amount, the user is allowed to freely select the light emission amount. In this embodiment, the upper limit of the light emission amount is changed based on the irradiation angle. However, a method of changing the settable range of the irradiation angle based on the light emission amount may be used. 5, the irradiation angle close to the light emitting unit 221 (Fresnel lens) is set to 24 mm. However, depending on the optical system, the irradiation angle close to the light emitting unit 221 may be 105 mm.

  Subsequently, FIG. 4B will be described. As can be seen from FIG. 4A, the specified temperature T1 is a temperature level at which damage to the light emitting unit 221 can be suppressed even when the next light emission amount is the maximum light emission amount of the strobe. T2 is a critical temperature at which damage to the light emitting unit 221 cannot be suppressed.

  If the temperature of the light emitting unit 221 during light emission during the light emission limiting process falls within the temperature T1 to T2, damage to the light emitting unit 221 can be suppressed, and thus the amount of light emission is varied depending on the current temperature. It is possible. FIG. 6 (a) shows a light emitting area where light emission is possible / impossible when the temperature of the light emitting unit 221 is T1, FIG. 6 (b) shows a light emitting area where light emission is possible / not possible when the temperature is T2, FIG. 4A shows the light emitting area where light emission is possible / impossible when it is in the middle. That is, as the temperature of the light emitting unit 221 is between the temperatures T1 and T2 and closer to the temperature T1, a margin remains up to the critical temperature T2. For this reason, the threshold line T0 can move upward in the light-emission enabled / disabled light emitting region in FIG. On the contrary, as the temperature of the light emitting unit 221 is between the temperatures T1 and T2 and closer to the temperature T2, the margin to the critical temperature T2 is less. Therefore, the threshold line T0 in FIG. 4A moves downward. For example, if the current temperature is T1, it is possible to select up to full light emission at 50 to 105 mm, and if the current temperature is T2, the control is such that only 1/128 of full light emission is possible at 80 mm.

  As described above, the light emission mode is changed to the manual mode, the level of the light emission amount that can suppress the damage of the light emitting unit 221 is determined, and the light emission restriction process of FIG.

  Returning to FIG. 3A, in the next step S106, the flash microcomputer 219 determines whether or not the switch SW2 is turned on via the camera microcomputer 101 in the same manner as in step S101. When the switch SW2 is turned on, the process proceeds to step S107. When the switch SW2 is on, the X signal at the S4 terminal included in the strobe contact group 230 is changed from Hi to Lo by the camera microcomputer 101.

  In the next step S107, when the strobe microcomputer 219 detects that the X signal of the S4 terminal included in the strobe contact group 230 has been changed from Hi to Lo, in synchronization with that, in step S202 of FIG. Performs manual flash firing with the determined flash output.

  In the present embodiment, the light emission mode at the time of the light emission restriction process is set to the manual mode (step S201 in FIG. 3B). However, any light emission mode may be used as long as the light emission amount that does not exceed the critical temperature T2 that may damage the light emitting unit 221 can be determined in advance. For example, it may be any one of multi-flash, automatic dimming in which the camera body 100 automatically determines the amount of light according to the subject, and external dimming in which the flash device 210 is automatically dimmed.

  According to the above-described embodiment, the stroboscopic zoom unit (the zoom control circuit 220 and the stroboscopic microcomputer 219) that sets the irradiation angle of the light emitting unit 221 according to the focal length of the imaging lens 110 is provided. Further, it has switching means for switching the light emission mode (the part of the strobe microcomputer 219 that performs the operation of step S210 in FIG. 3B). Furthermore, it has the detection means (The thermometer and the strobe microcomputer 219 which are not shown in figure which detects the temperature of the light emission part 221) which detect the information regarding the heat_generation | fever of the light emission part 221. Furthermore, it is assumed that the information related to the heat generation of the light emitting unit 221 has reached the specified heat generation region (the region where the temperature is above T1 and below temperature T2 in FIG. 4B). In this case, there is a light emission control means for restricting the light emission (the portion of the strobe microcomputer 219 that performs the operation of step S105 in FIG. 3A (FIG. 3B)). The light emission control means adjusts the light emission amount when light emission is restricted.

Specifically, the light emission control means sets the upper limit of the light emission amount according to the irradiation angle or restricts the settable range of the irradiation angle according to the light emission amount when the light emission is restricted.

When the light emission is restricted, the upper limit of the light emission amount or the settable range of the irradiation angle is changed according to the heat generation state of the light emitting unit 221 (see FIG. 4).

  Also, when the flash is limited, manual flash that allows the user to determine the flash output arbitrarily, multi-flash, automatic flash control that automatically determines the flash output according to the subject on the imaging device, and external control that automatically adjusts the flash on the flash device The mode is switched to one of the light modes.

Therefore, it is possible to provide a strobe device 210 and a camera including the strobe device that can prevent the occurrence of a photo opportunity while suppressing heat generation of the light emitting portion 221, that is, damage to the light emitting portion 221 due to a temperature rise. It becomes.
(Correspondence between the present invention and the embodiment)
The strobe microcomputer 219 and the zoom control circuit 220 correspond to the strobe zoom means of the present invention, and the light emitting unit 221 corresponds to the light emitting unit of the present invention. Further, the portion of the strobe microcomputer 219 that executes the operation of step S103 in FIG. 3A corresponds to the detection means for detecting information related to the heat generation of the light emitting unit of the present invention. Further, the portion of the strobe microcomputer 219 that executes the operation of step S105 in FIG. 3A corresponds to the light emission control means for restricting the light emission when the information related to the heat generation of the light emitting unit of the present invention reaches the specified heat generation region. To do.

  The dimensions, shapes, relative arrangements, and the like of the components exemplified in the above embodiments should be appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions. It is not limited.

1 is a block diagram illustrating a circuit configuration of a strobe device, an imaging device, and an imaging lens according to an embodiment of the present invention. It is a block diagram which shows the circuit structure in the strobe device of FIG. It is a flowchart which shows the operation | movement at the time of strobe light emission concerning one Example of this invention. It is the figure which showed the relationship between the zoom for performing light emission prohibition cancellation concerning one execution example of this invention, light emission quantity and temperature. It is the figure which showed the strobe zoom mechanism concerning one Example of this invention. FIG. 6 is a diagram more specifically showing a relationship between zoom and light emission amount for canceling light emission prohibition according to an embodiment of the present invention.

Explanation of symbols

100 Camera body (imaging device)
DESCRIPTION OF SYMBOLS 101 Camera microcomputer 110 Imaging lens 111 Lens microcomputer 216 Xenon tube 219 Strobe microcomputer 220 Zoom control circuit 221 Light emission part 230 Strobe contact group

Claims (7)

A strobe device capable of changing the illumination angle of the light emitting unit,
An irradiation angle setting means for setting an irradiation angle of the light emitting unit;
Detecting means for detecting information relating to heat generation of the light emitting unit;
If the information about the heat generation of the light emitting portion reaches the prescribed heating area, without changing the irradiation angle before Symbol emitting unit, the control for changing the possible values as a light-emitting amount of the light emitting portion in accordance with the irradiation angle a flash device characterized in that it comprises a means. The control means reduces the value that can be set as the light emission amount of the light emitting unit as the irradiation angle of the light emitting unit is large, when the information related to the heat generation of the light emitting unit reaches a specified heat generating region. Item 2. The strobe device according to item 1. The control unit may change a value that can be set as the light emission amount of the light emitting unit according to the information related to the heat generation of the light emitting unit when the information related to the heat generation of the light emitting unit reaches a specified heat generating region. The strobe device according to claim 1 or 2. Wherein if the information related to heat generation of the light emitting portion reaches the prescribed heating area, with claim 1, characterized in that user to the manual light emission mode can be determined arbitrarily the amount of light emission of 3 1 The strobe device described in the item . The strobe device is detachable from the imaging device,
The said irradiation angle setting means sets the irradiation angle of the said light emission part to the angle according to the focal distance of the imaging lens of the imaging device with which the mounting | wearing was mounted | worn, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Strobe device. An imaging device capable of changing an irradiation angle of a light emitting unit,
An irradiation angle setting means for setting an irradiation angle of the light emitting unit based on a focal length of the imaging lens ;
Detecting means for detecting information relating to heat generation of the light emitting unit;
Control means for changing a value that can be set as the light emission amount according to the irradiation angle without changing the irradiation angle of the light emitting unit when the information about the heat generation of the light emitting unit reaches a specified heat generation region ; An imaging apparatus comprising: A camera system including a strobe device capable of changing an irradiation angle of a light emitting unit, and an imaging device equipped with the strobe device,
An irradiation angle setting means for setting an irradiation angle of the light emitting unit based on a focal length of an imaging lens of the imaging device ;
Detecting means for detecting information relating to heat generation of the light emitting unit;
A light emission control means for restricting light emission when the information about heat generation of the light emitting unit reaches a specified heat generation region;
The light emission control unit includes a control unit that changes a value that can be set as the light emission amount of the light emitting unit according to the irradiation angle without changing the irradiation angle of the light emitting unit when the light emission is limited. A camera system characterized by

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