JP6544941B2 - Optical apparatus control method, lens apparatus, imaging apparatus and imaging system - Google Patents

Description

  The present invention relates to a control method of an optical apparatus, a lens apparatus, an imaging apparatus, and an imaging system.

  Patent Document 1 proposes a lens device for a television camera that has position detection means for detecting the position of the lens, and stops the power supply to the position detection means when the lens is stopped.

Japanese Patent Application Laid-Open No. 10-68862

  However, sensors generally take a long time to stabilize their output after power on. For this reason, when the power to the position detection means is stopped each time the lens is stopped as in Patent Document 1, it takes a long time to start position detection when the lens is driven, and shutter timing is missed in continuous shooting. It may not be possible to focus.

  An exemplary object of the present invention is to provide a control method of an optical device, a lens device, an imaging device, and an imaging system capable of achieving both good position detection of an optical element and power saving.

A lens apparatus according to the present invention is a lens apparatus attachable to and detachable from an imaging apparatus, and includes an optical element, a light emitting element, and a light receiving element for receiving light from the light emitting element, and based on the detection result of the light receiving element. a detecting means that detect the position of the optical element, and a lens control means for controlling the light emission amount of the light emitting element, the lens control unit, imaging mode of the imaging device is the first imaging mode If the light emitting element is set to the first light emission amount, the photographing mode of the imaging device is set to the second photographing mode in which the exposure time is longer than the first photographing mode, and If the optical element is detected to be in place, or to light the light emitting element in the second light emission amount smaller than the first light emission quantity, or, characterized in that turns off the light emitting element .

  According to the present invention, it is possible to provide a control method of an optical device, a lens device, an imaging device, and an imaging system capable of achieving both good position detection of an optical element and power saving.

It is a block diagram of a camera system of this embodiment. It is a figure which shows the structure of the position sensor of the focus lens shown in FIG. It is a figure which shows the structure of the position sensor of the aperture shown in FIG. It is a flowchart which shows operation | movement of the camera system shown in FIG. It is a modification of the flowchart shown in FIG.

  FIG. 1 is a block diagram of a camera system (shooting system) of the present embodiment. The camera system includes an interchangeable lens (lens apparatus) 100 and a camera (imaging apparatus) 200 to which the interchangeable lens 100 is detachably (removably) mounted. The camera 200 of the present embodiment is a digital single-lens reflex camera, but is not limited to this, such as a non-flex single-lens reflex camera (mirrorless camera). The present invention is also applicable to a lens integrated camera (optical apparatus).

  The camera 200 and the interchangeable lens 100 are communicably connected via the terminals 109 and 209. In addition, the interchangeable lens 100 is supplied with power from the camera 200 via the terminals 109 and 209.

  The interchangeable lens 100 is a lens device that is replaceably mounted on the camera 200. The interchangeable lens 100 includes a lens CPU 102, a memory 104, a switch 106, a terminal 109, a photographing optical system, various driving means, position detection means, insertion / removal detection means 119, and other members.

  The lens CPU 102 is a lens control unit that controls the operation of each part of the interchangeable lens 100, and is configured by a microcomputer. The lens CPU 102 executes a control method of controlling the power at the time of shooting. In this case, the lens CPU 102 determines whether the first shooting mode to be described later is set for the camera 200, and whether the second shooting mode having a longer exposure time than the first shooting mode is set. Etc. from the camera CPU 202. However, the camera CPU 202 may execute this control method.

  The memory 104 stores characteristic information specific to the interchangeable lens 100, optical information, a program of a control method, and information used therefor. The lens CPU 102 transmits characteristic information, optical information, and other information to a camera CPU 202 described later in the camera 200. The characteristic information includes the name of the interchangeable lens 100 (ID information for specifying the model), the maximum communication speed, the open F value, whether it is a variable power lens, the compatible AF system, and the information of the image height that can be AF included. Further, as optical information, sensitivity information of the focus lens 110 obtained by the matrix of the position of the focus lens 110, the position of the variable magnification lens 112, the state of the diaphragm 114, etc., focus correction amount (design value), focus correction manufacturing error It contains information of value etc. Other information includes information such as other operation states, setting states, request instructions (transmission request) for various information, and drive instructions.

  The switch 106 is an operation means that allows the user to select automatic focusing (AF) or manual focusing (MF). The state of the switch 106 is also transmitted from the interchangeable lens 100 to the camera 200 via the terminals 109 and 209.

  The photographing optical system forms a subject image, and includes a plurality of optical elements such as a focus lens 110, a variable magnification lens 112, a stop 114, a correction lens 116, and a built-in extender 118. OA is an optical axis of the photographing optical system. These optical elements can change imaging conditions by movement.

  The focus lens 110 moves in the optical axis direction to perform focusing. The variable magnification lens 112 moves in the optical axis direction to change the focal length. In addition, it is possible to drive the variable magnification lens 112 by the user operating the variable magnification lens driving unit (not shown). When the variable magnification lens 112 is driven, the drive direction and the amount of drive of the variable magnification lens 112 can be detected by a variable magnification lens drive detection unit (not shown). An aperture 114 is disposed at the exit pupil position of the imaging optical system to adjust the amount of incident light. The correction lens 116 is moved in a direction perpendicular to the optical axis to correct image blurring. In addition, as long as there is a component orthogonal to the optical axis, the “direction orthogonal to the optical axis” may be moved obliquely to the optical axis.

  The built-in extender 118 is inserted into and removed from the optical axis when the user operates an operation unit such as a lever provided on the barrel of the interchangeable lens 100. When the built-in extender 118 is inserted into and removed from the optical axis, optical characteristics such as focal length, brightness and aberration of the photographing optical system change. Insertion and retraction of the built-in extender 118 with respect to the optical axis is detected by the insertion / removal detection means 119, and the detection result is transmitted to the lens CPU 102 and then transmitted from the lens CPU 102 to the camera CPU 202.

  The driving unit includes an MF driving unit 120, an AF driving unit 122, an aperture driving unit 124, a lock driving unit 126, and a correction lens driving unit 128.

  The MF driving means 120 enables the user to move the focus lens 110 manually in the MF. In addition, when the MF drive unit 120 is operated, the direction and the operation amount in which the MF drive unit 120 is operated can be detected by the MF drive detection unit (not shown). The AF driving means 122 moves the focus lens 110 in AF, and includes a motor 123. The aperture drive means 124 drives the aperture 114 to change the aperture, and includes the motor 125.

  The lock driving means 126 drives the mechanical lock 127 to change the state of the mechanical lock 127 between the locked state and the unlocked state (unlocked state). The mechanical lock 127 fixes the correcting lens 116 in the locked state, and releases the fixing of the correcting lens 116 so that the correcting lens 116 can move in the unlocked state. The correction lens driving means 128 moves the correction lens 116 in the direction orthogonal to the optical axis OA.

  The position detection means includes position sensors 130 and 140, and each includes a light emitting element and a light receiving element for receiving light from the light emitting element, and the position of the optical element is determined based on the light reception result (detection result) of the light receiving element. It is an optical instrument to detect. The position sensor 130 detects the position on the optical axis of the focus lens 110, and the position sensor 140 detects the opening position of the diaphragm 114. The detection result by the position detection unit is transmitted from the lens CPU 102 to the camera CPU 202.

  FIG. 2A is a view showing an arrangement example of the focus lens 110, the motor 123 and the position sensor 130, and FIG. 2B is a view showing a circuit configuration example of the position sensor 130. As shown in FIG. The position sensor 130 includes a light emitting element 131, a light receiving element 132, a scale 133, and an FET 136. In FIG. 2, the position sensor 130 detects the position of the focus lens 110 based on a change in the amount of light reflected by the scale 133.

  Although the light emitting element 131 irradiates a light flux to the scale 133 and is configured as an LED in FIG. 2B, the present invention is not limited to this. The light receiving element 132 is formed of a photodiode or the like, and receives light flux emitted from the light emitting element 131 and reflected by the scale 133. The scale 133 is a reflective type, and has a pattern in which reflective portions 134 and non-reflective portions 135 are alternately arranged. The pattern of the scale 133 is not limited to that shown in FIG. The motor 123 simultaneously drives the focus lens 110 and the scale 133 in the arrow direction. As the scale 133 moves, the light flux becomes a light and dark pattern and reaches the light receiving element 132.

  The FET 136 adjusts the amount of light emitted by the light emitting element 131. The light emitting element 131 may be adjustable between a light emitting state and a light emitting state with a predetermined light emitting amount (first light emitting amount), or a predetermined light emitting amount and a light emitting amount smaller than the predetermined light emitting amount (second It may be adjustable between the light-on state and the light-off state). The first light emission amount is a light emission amount necessary for the position sensor 130 to detect the position of the focus lens 110 with a predetermined accuracy. Further, the second light emission amount is a light emission amount in which the position sensor 130 can not detect the position of the focus lens 110 with a predetermined accuracy.

  The gate voltage of the FET 136 is set by the AD output from the lens CPU 102 to adjust the current flowing to the light emitting element 131. The gate voltage control of the FET 136 may be controlled by the PWM output of the lens CPU 102.

  FIG. 3A is a view showing an arrangement example of the aperture 114, the motor 125 and the position sensor 140, and FIG. 3B is a view showing a circuit configuration example of the position sensor 140. As shown in FIG. The position sensor 140 includes a photo interrupter 141, a light shielding wall 144, and an FET 145 in FIG. The motor 125 drives the aperture 114 and the light shielding wall 144 simultaneously.

  The position of the diaphragm 114 is detected by the light receiving element 143 receiving the light from the light emitting element (LED or the like) 142 of the photo interrupter 141 or the light shielding wall 144 shielding the light. In this example, when the diaphragm 114 is fully opened, the light shielding wall 144 reaches the position where the light beam of the light emitting element 142 is shielded.

  The FET 145 adjusts the amount of light emitted by the light emitting element 142. The light emitting element 142 may be adjustable between a light emitting state and a light emitting state at a predetermined light emitting amount (first light emitting amount), or a predetermined light emitting amount and a light emitting amount smaller than the predetermined light emitting amount (second It may be adjustable between the light-on state and the light-off state). The first light emission amount in this case is a light emission amount necessary for the position sensor 140 to detect the position of the diaphragm 114 with a predetermined accuracy. Further, the second light emission amount is a light emission amount in which the position sensor 140 can not detect the position of the diaphragm 114 with a predetermined accuracy.

  By the AD output from the lens CPU 102, the gate voltage of the FET 145 is set to adjust the current flowing to the light emitting element 142. The current adjustment method of the light emitting element 142 is not limited to this method. For example, the gate voltage of the FET 145 may be PWM controlled, the AD output may be directly connected to the cathode of the light emitting element 142 to form a constant current circuit, or the FET 145 may be turned on or off as a port output of the lens CPU 102.

  The camera 200 includes a camera CPU 202, a memory 204, a terminal 209, a main mirror 210, a sub mirror 211, an AF sensor 212, a pentaprism 213, a finder 214, a shutter 215, an image sensor 216, setting means 218, and other members.

  The camera CPU 202 is a camera control unit that controls each unit in the camera 200, and includes a microcomputer. The camera CPU 202 communicates various types of information via the lens CPU 102 and the terminals 209 and 109, and transmits various types of commands to the lens CPU 102 in accordance with the user's input. As described above, the camera CPU 202 may execute a control method of controlling the light emission amount of the light emitting element of the position detection unit. In this case, the camera CPU 202 receives, from the lens CPU 102, information in which the position sensors 130 and 140 include the light emitting elements 131 and 142. The memory 204 stores the ID of the camera 200, information received from the lens CPU 102, and the like, but also stores a program of the control method and information used in the control method when the camera CPU 202 performs the control method.

  The main mirror 210 is composed of a half mirror, which reflects a part of the luminous flux and transmits the rest. The sub mirror 211 reflects the light transmitted through the main mirror 210 and guides the light to the AF sensor 212. The AF sensor 212 performs so-called focus detection (phase difference AF) of a so-called phase difference detection method in which focus detection is performed by detecting a phase difference between image signals of a pair of subject images. Note that the AF method is not limited to phase difference AF.

  The pentaprism emits light of erecting right image by reflection twice. The finder 214 allows the user to observe the subject. The shutter 215 adjusts the exposure of the image sensor 216. The image sensor 216 photoelectrically converts an object image, and is configured by a photoelectric conversion element such as a CCD sensor or a CMOS sensor.

  The setting unit 218 is an input unit such as a dial, a button, a panel, a lever, or a switch that allows the user to make various settings. The setting unit 218 can set a first shooting mode and a second shooting mode in which the exposure time is longer than the first shooting mode. The first shooting mode includes a continuous shooting mode. The second imaging mode includes a long time exposure mode (long-second exposure mode) and a bulb imaging mode. The long time exposure is a photographing method in which the image sensor 216 is exposed long while the shutter 215 is open. In the bulb shooting, when the shutter speed is longer than one second, the shutter 215 is opened while the release switch is pressed. Continuous shooting refers to a shooting method in which shooting is performed continuously while the release switch is pressed.

  The main mirror 210 and the sub mirror 211 are configured to be movable between a mirror down position shown in FIG. 1 and a mirror up position (not shown). At the mirror-up position, the main mirror 210 and the sub mirror 211 retract from the optical axis, and the imaging light beam enters the imaging element 216. At the mirror down position, the photographing light flux that has passed through the photographing optical system is reflected by the main mirror 210, a part of which passes through the pentaprism 213, is reflected by the light flux guided to the finder 214, and is reflected by the sub mirror 211 to the AF sensor 212. It is split into luminous fluxes to be guided.

  When the camera CPU 202 determines that the switch 106 selects AF, it enters an AF operation. The camera CPU 202 processes the output from the AF sensor 212, detects the focus state of the photographing optical system, and calculates the drive amount of the focus lens 110 for obtaining the in-focus state with respect to the object together with the acquired optical information of the lens. . The camera CPU 202 transmits the calculated focus lens driving amount to the lens CPU 102. The lens CPU 102 drives the focus lens 110 to the in-focus position by controlling the AF driving unit 122 according to the position information of the focus lens 110 from the position sensor 130 and the received focus lens driving amount.

  If the camera CPU 202 determines that the switch 106 selects the MF, AF is not performed, and the user manually drives the focus lens 110 to a predetermined position via the MF driving unit 120 to perform focus adjustment.

  The camera CPU 202 calculates the drive amount of the aperture 114 according to the photometric result by the photometric sensor (not shown) or the aperture value set by the user in response to the half-pressing operation of the release switch (not shown) provided in the camera 200. Next, the camera CPU 202 transmits the diaphragm drive amount to the lens CPU 102, and the lens CPU 102 controls the diaphragm 114 by controlling the diaphragm drive means 124 according to the received diaphragm drive amount and the diaphragm position information from the position sensor 140. To drive.

  Also, the camera CPU 202 transmits a camera shake correction start command to the lens CPU 102 in response to the half-press operation of the release switch. When receiving the shake correction start command, the lens CPU 102 first controls the correction lens drive unit 128 to hold the correction lens 116 at the control center position, and then controls the lock drive unit 126 to drive the mechanical lock 127. Release the lock. Thereafter, the lens CPU 102 controls the correction lens driving unit 128 according to the detection result of the camera shake detection unit (not shown) to drive the correction lens 116 to correct the camera shake.

  The camera CPU 202 drives the shutter 215 in accordance with the full-pressing operation of the release switch, guides the light flux from the photographing optical system to the image pickup element 216, and performs exposure (photographing). The camera CPU 202 generates image data (moving image or still image) based on the output from the imaging device 216, and records the image data in a recording medium.

  FIG. 4 is a flowchart showing the operation of the camera system, in which the lens CPU 102 mainly executes a control method of controlling power at the time of shooting. FIG. 5 is a modification of FIG. "S" represents a step (process), Y represents Yes, and N represents No. The flowcharts shown in FIGS. 4 and 5 can be embodied as a program for causing a computer to execute each step. Such programs may be stored on non-transitory computer readable media.

  In step S101, the camera CPU 202 determines whether the user has operated the release switch. If the user operates the release switch to indicate the start of the photographing operation, the process advances to step S102, and if there is no operation, the determination is continued.

  In S102, the camera CPU 202 communicates with the lens CPU 102, and communicates the shooting mode set by the user to the lens. The shooting mode is a bulb shooting mode, a continuous shooting mode, and the like.

  In S103, the lens CPU 102 sets the light amounts of the light emitting elements 131 and 142 of the position sensors 130 and 140 to a detectable level. S103 functions as a step of lighting the light emitting elements 131 and 142 with the first light emission amount.

  In step S104, the camera CPU 202 processes the output from the AF sensor 212 to detect the focus state of the photographing optical system, and combines with the optical information of the lens to drive the focus lens 110 for obtaining the in-focus state with respect to the subject. Calculate

  In S105, the camera CPU 202 transmits the driving amount of the focus lens 110 to the lens CPU. In S106, the lens CPU 102 controls the AF driving unit 122 according to the output of the position sensor 130 and the driving amount received from the camera 200, and drives the focus lens 110 to the in-focus position.

  In S107, the camera CPU 202 determines whether the in-focus position is on the basis of the output of the AF sensor 212 or the like, and if it is determined that it is not in focus, it proceeds to S108, and if it is determined that it is in focus, it proceeds to S109. That is, Y in S107 means that the position sensor 130 has detected that the focus lens is at the predetermined position (in-focus position).

  In S108, the camera CPU 202 transmits the focus lens driving amount to the lens CPU 102 again, and returns to S106. In S109, the camera CPU 202 determines an output from a photometric sensor output (not shown) and a setting of the user to determine the driving amount of the aperture 114.

  In S110, the camera CPU 202 transmits the driving amount of the aperture 114 to the lens CPU 102. In S111, the lens CPU 102 controls the diaphragm drive unit 124 based on the received diaphragm drive amount and the diaphragm position information from the position sensor 140, and drives the diaphragm 114. S111 means that the position of the diaphragm 114 detected by the position sensor 140 is at a predetermined position (a position giving the set Fno).

  In S112, the camera CPU 202 transmits the exposure time to the lens CPU 102. In step S113, the lens CPU 102 determines, from the shooting mode information and the exposure time received from the camera CPU 202, whether the current shooting is bulb shooting or long-time exposure longer than a predetermined exposure time.

  If it is determined in S113 that the long time exposure or the bulb imaging is determined, the process proceeds to S114, and if the bulb imaging or the long time exposure is not determined in S113, the process proceeds to S115.

  At S114, the lens CPU 102 sets the light amounts of the light emitting elements 131 and 142 of the position sensors 130 and 140 to a value smaller than the light amount set at S103. S114 functions as a step of turning on the light emission amount of the light emitting elements 131 and 142 with a second light emission amount smaller than the first light emission amount, or turning off the light emitting elements. In the case of long time exposure or bulb photography, since the light emission amount of the light emitting elements 131 and 142 is small, power saving is achieved. Power saving can be achieved by performing S114 immediately after Y in S107 and Y in S113 are all satisfied.

  In the case of N in S113, when long time exposure or bulb shooting is not set, the first light emission amount of the light emitting elements 131 and 142 is not changed (lighting with the first light emission amount) before exposure. means. Since the light emission amount of the light emitting elements 131 and 142 is maintained, the position of the focus lens 110 or the like can be immediately detected by continuous shooting or the like, so that it is possible to prevent the shutter chance from being missed.

  In S115, the camera CPU 202 opens the shutter 215 to start exposure, and closes the shutter 215 after a predetermined time to end the exposure (S116).

  Thereafter, in S117, the lens CPU 102 sets the light amount of the light emitting element 142 of the position sensor 140 to a detectable level, and in S118 drives the diaphragm 114 to the open state. Thereafter, in S119, the light amount of the light emitting element 142 of the position sensor 140 is set to a value smaller than the light amount set in S103.

  As shown in FIG. 5, it differs from FIG. 4 in that the light amounts of the light emitting elements 131 and 142 of the position sensors 130 and 140 are set at individual timings. In FIG. 5, the same steps as those in FIG. 4 are denoted by the same reference numerals, and only different points will be described below. After S102, S121 is performed instead of S103. In S121, the lens CPU 102 sets the light amount of the light emitting element 131 of the position sensor 130 to a detectable level. Thereafter, S104 to S108 are performed, and S122 is performed. In S122, the lens CPU 102 sets the light amount of the light emitting element 142 of the position sensor 140 to a detectable level. The subsequent steps are identical to FIG.

  When the camera CPU 202 executes the control method, it is as follows. That is, first, at S103, the camera CPU 202 sends a signal to the lens CPU 102 to cause the position sensors 130 and 140 to detect the positions of the focus lens 110 and the aperture 114 by turning on the light emitting elements 131 and 142 with the first light emission amount. . Next, when the camera CPU 202 detects that these optical elements are at predetermined positions by the position sensor, and the second photographing mode is set by the setting unit 218, the light emitting element of the light emitting element is exposed before exposure. The light emission amount is made smaller than the first light emission amount. That is, the light emitting element is turned on with the second light emission amount, or the light emitting element is turned off. Further, when the first photographing mode is set by the setting unit 218, the camera CPU 202 does not change the first light emission amount of the light emitting elements 131 and 142 before the exposure (the light emitting element is subjected to the first light emission Lights up in quantity).

  In each embodiment, the drive of the focus lens 110 and the diaphragm 114 is started by using the release switch as a trigger. In addition, the drive of the focus lens 110 or the diaphragm 114 may be started by using the operation of the MF drive unit 120 of the focus lens 110 or the variable magnification lens drive unit (not shown) as a trigger.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the present invention.

  The optical apparatus can be applied to, for example, an imaging apparatus such as a digital camera, a surveillance camera, a video camera, and a camera system including an interchangeable lens and a camera body.

102: lens CPU (lens control means) 110: focus lens (optical element) 114: diaphragm (optical element) 130, 140: position sensor (position detection means) 131, 142: light emitting element 132, 143: Light receiving element, 202: camera CPU (camera control means),

Claims (10)

A lens device that can be attached to and removed from an imaging device,
An optical element,
A light emitting element, and a light receiving element for receiving light from the light emitting element, and detecting means for detecting the position of the optical element based on the detection result of the light receiving element;
Lens control means for controlling the light emission amount of the light emitting element;
The lens control means
When the imaging mode of the imaging device is set to the first imaging mode, the light emitting element is turned on with the first light emission amount, and the imaging mode of the imaging device has an exposure time longer than that of the first imaging mode When the long second imaging mode is set and it is detected that the optical element is at the predetermined position, the light emitting element is turned on with a second light emission amount smaller than the first light emission amount, or A lens device characterized by turning off the light emitting element.   The lens apparatus according to claim 1, wherein the optical element includes a focus lens movable at the time of focusing, and the predetermined position is a focusing position. The optical element includes an aperture for adjusting the amount of light,
The lens apparatus according to claim 1, wherein the predetermined position is a position corresponding to a set f-number. The light emitting element is a first light emitting element, the light receiving element is a first light receiving element, the detection unit is a first detection unit, and the lens control unit is a first lens control unit.
The lens device is
With focus lens which can move at the time of focus adjustment,
A second light emitting element, and a second light receiving element for receiving light from the second light emitting element, and a second detecting means for detecting the position of the focus lens based on the detection result of the second light receiving element;
And second lens control means for controlling an amount of light emission of the second light emitting element.
The second lens control means
When the imaging mode of the imaging device is set to the first imaging mode, the second light emitting element is turned on with a third light emission amount, and the imaging mode of the imaging device is set to the second imaging mode And when it is detected that the focus lens is at a predetermined position, the second light emitting element is lighted with a fourth light emitting amount smaller than the third light emitting amount, or the second light emitting element The lens device according to claim 3, wherein the light is turned off.   The lens apparatus according to any one of claims 1 to 4, wherein the first shooting mode is a continuous shooting mode.   The lens apparatus according to any one of claims 1 to 5, wherein the second photographing mode is a long time exposure mode or a bulb photographing mode. A control method of an optical device, comprising: a light emitting element; and a light receiving element for receiving light from the light emitting element, wherein the position of the optical element is detected based on the detection result of the light receiving element.
Determining a shooting mode;
Setting the light emission amount of the light emitting element based on the result of the determination;
When it is determined that the shooting mode is set to the first shooting mode, the light emission amount of the light emitting element is set to the first light emission amount, and the shooting mode has a longer exposure time than the first shooting mode. When it is determined that the imaging mode is set to 2 and it is detected that the optical element is at a predetermined position, a second light emission amount in which the light emission amount of the light emitting element is smaller than the first light emission amount Or the control method of the optical instrument characterized by setting to zero. And an optical element, an imaging device detachable lens apparatus having a detecting means for detecting a position of pre-Symbol optical element light emitting element or found on the basis of the detection result of the light receiving element for receiving,
Setting means for setting the shooting mode;
Camera control means for controlling the light emission amount of the light emitting element of the detection means;
The camera control means
When the photographing mode is set to the first photographing mode by the setting means, the light emitting element is turned on with the first light emission amount, and the photographing mode is exposed by the setting means than the first photographing mode. When the long second imaging mode is set and it is detected that the optical element is at the predetermined position, the light emitting element is turned on with a second light emission amount smaller than the first light emission amount, or An imaging device characterized by turning off the light emitting element; An imaging system comprising: a lens device; and an imaging device to which the lens device is attachable and detachable.
The lens device is
An optical element,
A light emitting element, and a light receiving element for receiving light from the light emitting element, and detecting means for detecting the position of the optical element based on the detection result of the light receiving element;
A lens control unit configured to control an amount of light emission of the light emitting element;
Have
The lens control means
When the imaging mode of the imaging device is set to the first imaging mode, the light emitting element is turned on with the first light emission amount, and the imaging mode of the imaging device has an exposure time longer than that of the first imaging mode When the long second imaging mode is set and it is detected that the optical element is at the predetermined position, the light emitting element is turned on with a second light emission amount smaller than the first light emission amount, or An imaging system characterized by turning off the light emitting element. An imaging system comprising: a lens device; and an imaging device to which the lens device is attachable and detachable.
The lens device is
An optical element,
A light emitting element, and a light receiving element for receiving light from the light emitting element, and detecting means for detecting the position of the optical element based on the detection result of the light receiving element;
The imaging device is
Setting means for setting the shooting mode;
Camera control means for controlling the light emission amount of the light emitting element of the detection means;
The camera control means
When the photographing mode is set to the first photographing mode by the setting means, the light emitting element is turned on with the first light emission amount, and the photographing mode is exposed by the setting means than the first photographing mode. When the long second imaging mode is set and it is detected that the optical element is at the predetermined position, the light emitting element is turned on with a second light emission amount smaller than the first light emission amount, or An imaging system characterized by turning off the light emitting element.