Lens device, imaging device, imaging device system, and program

Abstract

To provide a lens device advantageous to achieve compatibility with conventional devices, and extended functions in imaging devices.SOLUTION: A lens device (100) detachably attached to an imaging device body includes a control unit (111) that performs communication related to driving an optical member with the imaging device body. The control unit transmits second information to the imaging device body based on first information transmitted from the imaging device body, and prompts the imaging device body to retransmit the first information based on third information specifying the imaging device body transmitted from the imaging device body after the transmission of the second information.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lens device, an imaging device, an imaging device body, and a program. [Background technology]

[0002] Conventionally, imaging devices consisting of an imaging device body (also called a camera body) and an interchangeable lens device have been known. In such imaging devices, information within the interchangeable lens device is transmitted to the imaging device body, and the imaging device body transmits commands to the interchangeable lens device based on the transmitted information to drive the optical elements within the interchangeable lens device.

[0003] When a new function is added to the imaging device, if both the imaging device body and the interchangeable lens device are compatible with the new function, it is preferable that the new function be realized while maintaining compatibility with conventional devices that do not support the new function. Patent Document 1 discloses an imaging device to which a new function has been added while maintaining compatibility with conventional devices. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-53523 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to maintain compatibility with conventional devices, communication between an image capture device body and an interchangeable lens device, both of which support new functions, can be achieved by transmitting and receiving information according to conventional protocols that do not support the new functions. Therefore, the image capture device body cannot be identified by transmitting and receiving information in the interchangeable lens device, and the new functions cannot be realized as is. The present invention aims to provide a lens device that is advantageous for achieving compatibility with conventional devices and for realizing expanded functions in an image capture device, for example. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a lens device that is detachably attached to an imaging device body, and includes a control unit that communicates with the imaging device regarding driving of an optical member, the control unit receiving first information that identifies the imaging device transmitted from the imaging device, transmitting second information that identifies the lens device to the imaging device, and controlling the imaging device based on the first information. and identifying the type of the body of the The second information is a second information obtained by changing at least a part of the second information. 3 The information is transmitted to the imaging device. [Effects of the Invention]

[0007] According to the present invention, for example, it is possible to provide a lens device that is advantageous in realizing compatibility with conventional devices and in realizing expanded functions in an imaging device. [Brief explanation of the drawings]

[0008] [Figure 1] [Embodiment 1] A diagram showing an example of the configuration of an imaging device [Figure 2] [Embodiment 1] A diagram showing an example of the configuration of a control unit in a lens device and a control unit in an imaging device body. [Figure 3] [Embodiment 1] A diagram illustrating clock-synchronized communication [Figure 4] [Embodiment 1] A diagram illustrating information transmitted in initial communication [Figure 5] [Embodiment 1] A diagram illustrating the flow of processing for initial communication [Figure 6] [Embodiment 1] A diagram illustrating the flow of a process for selecting a driving mode [Figure 7] [Embodiment 1] A diagram illustrating the flow of zoom drive processing in power saving mode [Figure 8] [Embodiment 1] A diagram illustrating the flow of focus drive processing in power saving mode [Figure 9] [Embodiment 1] A diagram illustrating the driving of optical members for each type of imaging device body [Figure 10] [Embodiment 1] A diagram illustrating state transitions of the image stabilization lens and locking mechanism [Figure 11] [Embodiment 2] A diagram showing an example of the configuration of a control unit in a lens device and a control unit in an imaging device body. [Figure 12] [Embodiment 2] A diagram illustrating the flow of power control processing [Figure 13] [Embodiment 3] A diagram showing an example of the configuration of an imaging device [Figure 14] [Embodiment 3] A diagram showing an example of the configuration of a control unit in a lens device, a control unit in an adapter device, and a control unit in an imaging device body. [Figure 15] [Embodiment 3] A diagram illustrating information transmitted in initial communication [Figure 16] [Embodiment 3] A diagram illustrating the flow of processing for initial communication DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In principle (unless otherwise specified) throughout the drawings for describing the embodiments, the same components will be designated by the same reference numerals, and repeated explanations will be omitted.

[0010] [Embodiment 1] <Configuration of imaging device> FIG. 1 is a diagram showing an example of the configuration of an imaging device according to a first embodiment. In the diagram, reference numeral 100 denotes a lens device serving as an interchangeable lens device that is detachably attached to the imaging device body. The lens device 100 includes, in order from the subject OBJ side, a lens unit (lens group) 101, a lens unit 102 that is movable for zooming, and an aperture unit (aperture diaphragm) 114 that adjusts the amount of light as optical components. The lens device 100 also includes a shake correction lens unit 103 that corrects (reduces) image blur caused by camera shake or other lens device shake, and a lock mechanism 104 (fixing mechanism or limiting mechanism) that holds (fixes or limits) the lens unit 103 in an initial position. The lens device 100 also includes a lens unit 105 for focusing (focus adjustment). The shake correction lens unit 103 can also function as a movable lens unit for zooming.

[0011] The zoom lens unit 102 and the focus lens unit 105 are held by holding members 106 and 107, respectively. The holding members 106 and 107 are movably guided along the optical axis O and driven by driving units 108 and 109. The driving units 108 and 109 each include, for example, a stepping motor and drive the zoom lens unit 102 and the focus lens unit 105 in synchronization with a driving pulse. The image stabilization lens unit 103 is movably guided along a driving direction whose component is perpendicular to the optical axis and is driven by a driving unit 126. The locking mechanism 104 is locked or unlocked by a driving unit 110. The driving unit 110 includes, for example, a stepping motor and can maintain the locking mechanism 104 in a locked or unlocked state without using power by utilizing detent torque (self-holding force) in a so-called stable position. The driving circuit 125 (driver) is a circuit for driving the driving unit 110.

[0012] The control unit 111 (also referred to as a lens microcomputer) controls the operation of each unit within the lens device 100. The control unit 111 includes a communication unit 140, and receives drive commands and transmission request commands transmitted from the imaging device body 200 via the communication unit 140. The control unit 111 controls the drive of optical members based on the drive commands, and transmits information within the lens device to the imaging device body 200 based on the transmission request commands.

[0013] When the lens device 100 is started up, the communication unit 140 transmits information for identifying the lens device 100 and information about functions supported by the lens device 100 to the communication unit 210 in the imaging device body. The communication unit 210 also transmits information for identifying the imaging device body 200 and information about functions supported by the imaging device body 100 to the communication unit 140 in the lens device. Through this initial communication, for example, information required to drive optical members in the lens device is transmitted between the imaging device body 200 and the lens device 100. Details of this initial communication will be described later.

[0014] The diaphragm unit 114 may be configured to include, for example, diaphragm blades 114a and 114b. The states of the diaphragm blades 114a and 114b are detected by a detection unit 115 that includes, for example, a Hall element, and a detection signal is input to the control unit 111 via an amplifier 122 and an A / D converter 123. The control unit 111 outputs a drive signal based on the detection signal from the A / D converter 123, and the drive circuit 121 drives the actuator 113 based on the drive signal. In this way, the actuator 113 drives the diaphragm unit 114, thereby achieving light intensity adjustment.

[0015] The lens device 100 has an operation ring 130, an operation amount detection unit 131, a shake correction switch 132, and a zoom switch 133. The operation amount detection unit 131 may include, for example, two photointerrupters (encoders) that output two-phase signals in response to the rotation of the operation ring 130, and detects the operation amount of the operation ring 130. The shake correction switch 132 may be, for example, a slide switch, and is used to switch the operation of the shake correction lens unit 103 ON / OFF. The zoom switch 133 may be, for example, a seesaw switch, and is used to drive the zoom lens unit 102. Information on the operation amount of the operation ring 130, the state of the shake correction switch 132, and the state of the zoom switch 133 is input to the control unit 111. The control unit 111 may also transmit the operation amount of the operation ring 130 to a control unit 207 in the imaging device body via a communication unit 140.

[0016] The operation target of the operation ring 130 can be changed by settings in the imaging device body 200, and the operation target can include, for example, an aperture stop, focus, zoom, and shutter speed. The operation target can be set by a switch or a display unit (display) provided in the imaging device body 200. The control unit 207 in the imaging device body generates a drive command based on the amount of operation of the operation ring 130 received from the control unit 111 in the lens device 100, and transmits the drive command to the control unit 111. The control unit 111 controls the drive of the set operation target based on the received drive command. Note that if shutter speed is set as the operation target of the operation ring 130, the control unit 207 adjusts the shutter speed based on the amount of operation of the operation ring 130 received from the control unit 111.

[0017] The zoom switch 133 may be a known switch capable of controlling the drive speed and drive direction of the zoom lens unit 102. The control unit 111 drives the actuator 126 (which may include a voice coil motor) via the drive circuit 124 based on the shake of the imaging device detected by a shake sensor such as a vibration gyroscope. The control unit 111 executes shake correction control when the shake correction switch 132 is set to ON, and does not execute shake correction control when the shake correction switch 132 is set to OFF. The AF / MF switch 135 is a switch for switching between an AF (autofocus) state and an MF (manual focus) state. The AF state is a state in which the focus lens unit 105 is driven based on a drive command from the imaging device body 200. The MF state is a state in which the focus lens unit 105 is operated by an operation ring provided on the lens device 100 or a (remote) focus controller 10 (focus demand). The state of the AF / MF switch 135 is detected by the control unit 111, and information about this state is transmitted to the imaging device body 200 via the communication unit 140. Based on this information, the control unit 207 determines whether or not drive control (AF control) of the focus lens 105 from the imaging device body 200 can be performed.

[0018] A focus controller 10 and a (remote) zoom controller 20 (zoom demand) can be connected to the lens device 100. The focus controller 10 includes a rotary operation member (knob) and outputs a drive command for the focus lens unit 105 to the lens device 100 based on the amount of operation of the operation member. The zoom controller 20 includes a seesaw operation member and outputs a drive command for the zoom lens unit 102 to the lens device 100 based on the amount of operation of the operation member. The control unit 111 outputs a drive signal to the corresponding drive circuit 119 or 120 based on the drive command, thereby operating the drive unit 108 or 109. In this way, the zoom lens unit 102 performs a zoom operation and the focus lens unit 105 performs a focus operation.

[0019] The imaging device main body 200 includes an imaging element 201 such as a CCD sensor or a CMOS sensor, an A / D converter 202, a signal processing unit 203, a recording unit 204, a display unit 205, and a zoom switch 206. The imaging device main body 200 also includes a control unit (also called a camera microcomputer) 207, a communication unit 210, and a power supply unit 208. An (optical) image of a subject OBJ is captured (imaged) by the imaging element 201, and the image of the subject is displayed on the display unit 205. Light reflected from the subject OBJ is incident on the imaging element 201 via the lens unit 101, the zoom lens unit 102, the aperture unit 114, the image stabilizer lens unit 103, and the focus lens unit 105. The imaging element 201 captures (photoelectrically converts) an image formed via (the optical system of) the lens device 100 and outputs an electrical signal (analog signal). The A / D converter 202 converts the analog signal into a digital signal. The image sensor 201 also includes a phase difference sensor, and phase difference information corresponding to the amount of defocus obtained by the phase difference sensor is input to the signal processing unit 203 via the A / D converter 202. The signal processing unit 203 performs various image processing based on the digital signal from the A / D converter 202 to generate a video signal. The signal processing unit 203 also generates information related to the contrast of the video signal, the amount of defocus based on the phase difference information, and the luminance of the video signal. The signal processing unit 203 outputs the video signal to the display unit 205, and the display unit 205 displays a live view image on the display unit 205 based on the video signal.

[0020] The zoom switch 206 in the imaging device body 200 may be a push-type switch, and the control unit 207 generates a drive command for the zoom lens unit 102 based on the operation of the zoom switch 206 and transmits it to the control unit 111. The drive speed of the zoom lens unit 102 based on this operation may be set by a switch or a display unit (display) provided on the imaging device body 200. The control unit 111 outputs a drive command based on this drive command to the drive circuit 119 to operate the drive unit 108.

[0021] The control unit 207 transmits, via the communication unit 210, to the control unit 111, aperture stop drive commands based on the brightness information and AF drive commands based on the contrast information and phase difference information. The control unit 207 can adjust the amount of light by determining the combination of the shutter speed in the imaging device body 200 and the aperture value of the aperture unit 114 in the lens device based on the brightness information. The focus adjustment operation can be performed by generating a drive command for the focus lens 105 that will set the defocus amount to zero based on the sensitivity of the focus lens unit 105 (which depends on the focal length and object distance) and the defocus amount. The control unit 111 outputs a drive command based on the drive command to the drive circuit 120 to operate the drive unit 109. The control unit 111 can also control the drive of corresponding optical members based on the amount of operation of the operation ring 130 or a drive command generated by operation of the zoom switch 206.

[0022] <Communication between the imaging device body and the lens device> The lens device 100 and the imaging device body 200 communicate commands and information with each other via communication terminals provided in the mount unit 300. For example, in initial communication, the lens device 100 and the imaging device body 200 confirm the commands that each of them supports. After this confirmation, only commands that the lens device supports are sent from the communication unit 210 to the communication unit 140. The command confirmation operation between the lens device 100 and the imaging device body 200 will be described later.

[0023] <Power supply> The lens device 100 and the imaging device body 200 are mechanically and electrically connected via a mount unit 300. The power supply unit 134 of the lens device 100 obtains power (electricity) from the power supply unit 208 of the imaging device body 200 via a power terminal provided on the mount unit 300, and supplies power to each unit (such as each drive unit and the control unit 111) within the lens device 100. Note that some imaging device bodies cannot supply enough power to simultaneously (in parallel) drive all of the drive units in the lens device. In this embodiment, an imaging device body that can supply the power required to simultaneously drive all of the drive units of the lens device 100 is referred to as imaging device body A. An imaging device body that cannot supply the power required to simultaneously drive all of the drive units and does not respond to drive commands for each drive unit is referred to as imaging device body B. An imaging device body that cannot supply the power required to simultaneously drive all of the drive units but responds to drive commands for each drive unit is referred to as imaging device body C. Note that when an external power supply 30 is connected to the lens device 100, the power required to simultaneously drive all of the drive units is obtained, regardless of the type of imaging device body.

[0024] The lens device 100 determines information to be transmitted to the image capture device body 200 according to the type of the image capture device body, and transmits the information to the image capture device body 200. The lens device 100 also needs to control the driving of the driving unit according to the supplied power. The details of the determination of the information and the driving control will be described later.

[0025] 2 is a diagram showing an example of the configuration of a control unit in the lens device and a control unit in the imaging device body. The control unit 111 includes a communication unit 140, a drive control unit 141, and a power control unit 142. The drive control unit 141 generates a drive command based on output from the power control unit 142, which will be described later. The power control unit 142 selects a drive mode, which will be described later, in accordance with the configuration of the imaging device, and performs power control (control of the power required for drive) corresponding to the selected drive mode. The control unit 207 includes a communication unit 210 and an imaging control unit 211. The imaging control unit 211 performs control related to imaging, such as determining the combination of the shutter speed and the aperture value of the aperture unit 114, generating a focus correction amount (drive command) in AF operation, and generating a drive command based on the operation of the zoom switch 206.

[0026] <Clock synchronous communication> FIG. 3 is a diagram illustrating clock synchronous communication. The diagram shows waveforms on the clock line LCLK, data line DCL, and data line DLC during clock synchronous communication between the communication unit 140 and the communication unit 210. The communication unit 210 outputs a clock signal to the clock line LCLK and outputs 8-bit data B7 to B0 to the data line DCL in synchronization with the rising edge of the clock signal. The communication unit 140 outputs 8-bit data B7 to B0 to the data line DLC in synchronization with the rising edge of the clock signal. The communication unit 210 then receives 8-bit data B7 to B0 from the data line DLC in synchronization with the rising edge of the clock signal. Similarly, the communication unit 140 receives 8-bit data B7 to B0 from the data line DCL in synchronization with the rising edge of the clock signal. In this manner, the communication unit 210 and the communication unit 140 exchange communication data with each other. When the communication unit 140 receives 8-bit data B7 to B0 from the data line DCL, it sets the clock line LCLK to a low potential for the time Tbusy. Here, Tbusy is the time for the lens device 10 to process received data, and the communication unit 210 does not transmit data during this time. In this manner, flow control of communication data can be performed. By repeating this process, data (information) can be exchanged between the communication unit 210 and the communication unit 140.

[0027] <Initial Communication> Here, Fig. 4 is a diagram illustrating an example of information transmitted in the initial communication. Fig. 4(a) shows the configuration of information transmitted by the imaging device body and information transmitted by the lens device. This information can be 8-bit data in the clock-synchronized communication described above. This information is communicated (transmitted) in the "communication order" shown in Fig. 4(a).

[0028] The information transmitted by the lens device includes information A and B (information that identifies the lens device). Information A (lens device information A) includes lens device information A1, A2, A3, and A4. Lens device information A1, A2, and A3 are information indicating whether the aperture unit, zoom lens unit, and focus lens unit can be driven (whether they can be driven) by the imaging device body 200, respectively. Lens device information A4 is information indicating whether the state of the AF / MF switch 135 can be transmitted. Here, the driving possibility indicates whether they can be driven by driving commands A and B, which will be described later.

[0029] Information B (lens information B) is composed of lens device information B1, B2, B3, and B4. Lens device information B1 indicates information regarding whether or not the lens device is compatible with the image capture device body C. Lens device information B2, B3, and B4 are information regarding whether or not the aperture unit, zoom lens unit, and focus lens unit can be driven by the image capture device body 200 and whether or not there are drive restrictions. Here, whether or not there are drive restrictions refers to whether or not there are restrictions that prohibit parallel driving of other drive units when driving a drive unit in response to a drive command. Here, whether or not there are drive restrictions indicates whether or not there are drive restrictions and whether or not there are drive commands A and B, which will be described later.

[0030] Like the information transmitted by the lens device, the information transmitted by the imaging device body also includes information A and information B. Information A (imaging device body information A) includes imaging device body information A1 and A2. Imaging device body information A1 is information indicating the level of power supplied by the imaging device body 200 to the lens device 100. Imaging device body information A2 is information indicating whether the imaging device body 200 complies with drive command A. Information B (imaging device body information B) includes imaging device body information B1, which is information indicating whether the imaging device body 200 complies with drive command B.

[0031] 4(b) shows the values ​​(contents) of imaging device body information A and B (information identifying the imaging device body) corresponding to imaging device body A, imaging device body B, and imaging device body C, respectively. Imaging device body information A1 is information indicating a High level for imaging device body A, and information indicating a Low level for imaging device bodies B and C. Imaging device body information A2 is information indicating compatibility with drive command A for imaging device body A, and information indicating incompatibility with drive command A for imaging device bodies B and C. Imaging device body information B1 is information indicating compatibility with drive command B for imaging device body C, and information indicating incompatibility with drive command B for imaging device bodies A and B. Here, drive commands A and B differ from each other, for example, in terms of the resolution and type of the drive command.

[0032] FIG. 4(c) shows information A and B transmitted in the initial communication before the lens apparatus 100 identifies the image capture device body, and information A and B transmitted regarding image capture device bodies A, B, and C in the communication after the lens apparatus 100 has identified the image capture device body. Here, in the initial communication, lens apparatus information A is information that allows drive control of the lens apparatus 100 to be performed without straining the lens apparatus 100 regardless of which image capture device body it is connected to. This information indicates, for example, whether or not each optical element can be driven (prohibited). This is to prevent excessive power consumption due to parallel driving of multiple optical elements when, for example, the power supply from the image capture device body is at a low level. Furthermore, the information transmitted in the initial communication indicates whether or not AF / MF switch status information can be transmitted (prohibited).

[0033] In communication after the lens device 100 has identified the image capture device body, the lens device information A indicates information on whether each optical member can be driven, as determined by the image capture device bodies A, B, and C. Here, with respect to the image capture device body A, the lens device information A is information indicating that all optical members can be driven, and information indicating that AF / MF switch state information can be transmitted. With respect to the image capture device body B, the lens device information A is information indicating that all optical members cannot be driven (cannot be driven), and information indicating that AF / MF switch state information cannot be transmitted (cannot be transmitted). With respect to the image capture device body C, the lens device information A is information indicating that all optical members can be driven, and information indicating that AF / MF switch state information can be transmitted.

[0034] In the initial communication, lens device information B1 is information indicating that the lens device is not compatible with the image capture device body C. In the initial communication, lens device information B2, B3, and B4 is information indicating that each optical member cannot be driven (not possible). In communication after the lens device 100 has identified the image capture device body, lens device information B1 is information indicating that the lens device is compatible with camera C for all image capture device bodies. Lens device information B2, B3, and B4 is information indicating that each optical member can be driven for the image capture device body A. Lens device information B2, B3, and B4 is information indicating that each optical member cannot be driven (not possible) for the image capture device body B. Lens device information B2, B3, and B4 is information indicating that each optical member can be driven, that drive is limited, and that drive is limited for the image capture device body C, respectively. Note that the image capture device body C is compatible with drive command B, but because the power supply level is low, there is insufficient power to drive the zoom lens unit and the focus lens unit in parallel, and therefore drive of each is limited.

[0035] FIG. 5 is a diagram illustrating the flow of initial communication processing. This processing can be executed by the control unit 111. In the diagram, in step S101, lens device information A and B are acquired from a storage unit inside or outside the control unit 111. In step S102, it is determined whether a command requesting information A has been received from the communication unit 210. If the command is received, the processing proceeds to step S103. In step S103, imaging device body information A is acquired and the lens device information A is transmitted to the communication unit 210. In step S104, it is determined whether a command requesting information B has been received from the communication unit 210. If the command is received, the processing proceeds to step S105. In step S105, imaging device body information B is acquired and the lens device information B is transmitted to the communication unit 210. In step S106, it is determined whether a command confirming whether the lens device information A will be changed has been received from the communication unit 210. If the command is received, the processing proceeds to step S107. In step S107, information indicating that lens device information A has been changed is transmitted to communication unit 210. Here, upon receiving the information indicating the change, communication unit 210 transmits a command requesting information A and a command requesting information B to communication unit 140. Note that the transmission of the information indicating the change may be replaced by not providing a response (including not providing a response at all) that is consistent with the information (request) transmitted from the imaging device body. In other words, the processing in step S107 may be such that it is sufficient to prompt (including not responding) the imaging device body to retransmit the first information.

[0036] In step S108, it is determined whether a command requesting information A has been received from the communication unit 210, and if the command is received, the process proceeds to step S109. In step S109, if the imaging device body information A1 received in step S103 indicates High, the process proceeds to step S110, and if the information A1 is Low, the process proceeds to step S111. In step S110, information A and B corresponding to imaging device body A are acquired. In step S111, if the imaging device body information B1 received in S105 indicates imaging device body B, the process proceeds to S112, and if the imaging device body information B1 indicates imaging device body C, the process proceeds to S113. In step S112, information A and B corresponding to imaging device body B are acquired. In step S113, information A and B corresponding to imaging device body C are acquired.

[0037] In step S114, imaging device body information A is acquired, and lens device information A corresponding to this information A is transmitted to the communication unit 210. Here, the lens device information A is acquired in any of S110, S112, and S113. In step S115, it is determined whether a command requesting information B has been received from the communication unit 210, and if this command is received, the process proceeds to step S116. In step S116, imaging device body information B is acquired, and the lens device information B corresponding to this information B is transmitted to the communication unit 210. In this way, based on the imaging device body information A and B, lens device information A and B corresponding to the imaging device bodies A, B, and C can be transmitted to the communication unit 210.

[0038] The above describes the lens apparatus 100 and the imaging device body 200 that are compatible with drive command B. However, there are also lens apparatuses 100 and imaging device bodies 200 that are compatible only with drive command A. In the case of a lens apparatus 100 that is compatible only with drive command A, in step S103 of the processing flow in FIG. 5 , the imaging device bodies A and B are identified using only the imaging device body information A, and lens device information is acquired. Also, because the imaging device body 200 does not send a command requesting information B, the processing from step S104 onward is not executed, and the processing ends. Through the processing described above, if the imaging device body 200 is imaging device body A, lens device information corresponding to imaging device body A is transmitted to the communication unit 210. Also, if the imaging device body 200 is imaging device body B or C, lens device information corresponding to imaging device body B or C is transmitted to the communication unit 210. The case of an imaging device body 200 that is compatible only with drive command A is similar to the case of a lens apparatus 100 that is compatible only with drive command A.

[0039] <Effects of this embodiment> According to this embodiment, even if the lens apparatus 100 determines that the image capture device body 200 is the image capture device body C after transmitting the lens apparatus information A, the transmitted lens apparatus information A can be updated. This allows the image capture device body C to be granted permission to drive based on the drive command B. Furthermore, the lens apparatus information B can be used to transmit information regarding drive restrictions on the optical elements to the image capture device body 200. Therefore, the image capture device body 200, acting as the image capture device body C, can issue drive commands for the optical elements under the drive restrictions. Note that, if parallel drive of multiple optical elements is not possible due to power supply constraints, the control unit 111 may transmit information regarding the drive restrictions to the control unit 207 in communication after the initial communication. This configuration can also achieve the above-described effects. Note that, while the example illustrates a case in which the focus lens unit has a drive restriction, this is not limiting, and other optical elements may also have drive restrictions. As described above, even when the function of the image capture device is expanded, compatibility with existing devices and expanded functions of the image capture device can be achieved depending on the combination of the lens apparatus 100 and the image capture device body 200.

[0040] <Drive mode> Here, we will explain the process by which the control unit 111 (power control unit 142) determines the drive mode based on the configuration of the imaging device. The drive modes can include four modes: full drive mode, partial drive mode, full drive prohibited mode, and power reduction mode. The full drive mode is a drive mode in which all optical components can be driven in parallel when sufficient power is supplied from the imaging device body 200 to the lens device 100 or when an external power source is connected to the lens device 100. The partial drive mode is a drive mode in which power is insufficient to drive all optical components in parallel and no drive command is issued from the imaging device body 200. In the partial drive mode, only some optical components are driven so that power consumption does not exceed a predetermined power supply amount. Here, drive of the focus lens unit 105 is prohibited, while parallel drive (partial drive) of other optical components is enabled. Note that the optical components whose drive is prohibited are not limited to the focus lens unit 105. The reduced power mode is a drive mode used when there is insufficient power to drive all optical components in parallel and a drive command is issued from the imaging device body 200. In the reduced power mode, selective drive control of the optical components is performed so that the amount of power consumed does not exceed a predetermined amount of power supply. The reduced power mode will be described later.

[0041] FIG. 6 is a diagram illustrating the flow of a drive mode selection process. Here, it is assumed that the initial drive mode is set to the partial drive mode. In this diagram, in step S501, it is determined whether the external power supply 30 is connected to the lens apparatus 100. If the external power supply 30 is connected to the lens apparatus 100, processing proceeds to step S502. If the external power supply 30 is not connected to the lens apparatus 100, processing proceeds to step S503. In step S502, the full drive mode is set as the drive mode, and processing ends. In step S503, it is determined whether the image capture device body 200 to which the lens apparatus 100 is connected is other than the image capture device body C. If the image capture device body 200 is other than the image capture device body C, processing proceeds to step S505. If the image capture device body 200 is not other than the image capture device body C, processing proceeds to step S504. In step S504, the power reduction mode is set as the drive mode. In step S505, it is determined whether the imaging device body 200 to which the lens device 100 is connected is imaging device body A. If the imaging device body 200 is imaging device body A, the process proceeds to step S506. If the imaging device body 200 is not imaging device body A, the process proceeds to step S507. In step S506, the full drive mode is set as the drive mode, and the process ends. In step S507, the partial drive mode is set as the drive mode. In step S508, drive of the focus lens unit 105 is prohibited, and the process ends. In this manner, the drive mode is set by the power control unit 142.

[0042] Here, the processing of control unit 111 in the partial drive mode will be described. In the partial drive mode, driving of focus lens unit 105 is prohibited. Therefore, even if control unit 111 receives a drive command from focus controller 10, for example, control unit 111 ignores the drive command and does not generate a drive command for drive unit 141. Furthermore, when control unit 111 receives a drive command for an optical member other than focus lens unit 105, control unit 111 generates a drive command for a drive unit corresponding to that optical member. In this way, in the partial drive mode, driving of only some of the optical members is executed.

[0043] Here, the processing of the control unit 111 in the power saving mode will be described. FIG. 7 is a diagram illustrating the flow of zoom drive processing in the power saving mode. Here, priority is given to driving the zoom lens unit 102 over the focus lens unit 105. By controlling the zoom lens unit 102 and the focus lens unit 105 so that they are not driven in parallel, the amount of power consumed does not exceed a predetermined amount of power supply. The processing in FIG. 7 starts when a drive command for the zoom lens unit 102 is input to the control unit 111. First, in step S701, it is determined whether the focus lens unit 105 is being driven. If the focus lens unit 105 is being driven, the processing proceeds to step S702. If the focus lens unit 105 is not being driven, the processing proceeds to step S703. In step S702, the driving of the focus lens unit 105 is stopped, and the processing returns to step S701. In step S703, a drive command for the zoom lens unit 102 is output to the drive unit 108, and the processing ends.

[0044] FIG. 8 is a diagram illustrating the flow of focus drive processing in the reduced power mode. The processing in this diagram starts when a drive command for the focus lens unit 105 is input to the control unit 111. First, in step S801, it is determined whether the zoom lens unit 102 is being driven. If the zoom lens unit 102 is being driven, the drive command for the focus lens unit 105 is discarded, and the processing ends. Therefore, driving of the focus lens unit 105 is not executed. If the zoom lens unit 102 is not being driven, the processing proceeds to step S802. In step S802, a drive command for the focus lens unit 105 is output to the drive unit 109, and the processing ends. In this way, by giving priority to driving the zoom lens unit 102 and exclusively driving the zoom lens unit 102 and the focus lens unit 105, it is possible to prevent power consumption from exceeding a predetermined power supply amount.

[0045] FIG. 9 illustrates the drive of optical elements for each type of imaging device body. (a) in the figure shows the drive of optical elements in the lens device 100 in response to a drive command from the communication unit 210. This figure shows an example of the drive of each optical element when the lens device 100, which corresponds to drive command B, is connected to imaging device bodies A, B, and C. Circles indicate drive possible, crosses indicate drive impossible, and triangles indicate drive possible in power saving mode. Here, it is assumed that an external power source 30 is not connected to the lens device 100. Since imaging device body A receives sufficient power, the lens device 100 operates in full drive mode. In the figure, Iris indicates the aperture unit, Zoom indicates the zoom lens unit, Focus indicates the focus lens unit, IsShift indicates the image stabilization lens unit, and IsMloc indicates the locking mechanism. Note that imaging device body A does not receive drive commands for the image stabilization lens unit or the locking mechanism from the imaging device body.

[0046] Regarding the imaging device body B, if there is no power supply from the external power source 30, the lens device 100 operates in a partial drive mode. In addition, since the imaging device body B does not respond to drive commands from the imaging device body B, none of the optical members are driven by drive commands from the communication unit 210.

[0047] With regard to the imaging device body C, if there is no power supply from the external power source 30, the lens device 100 operates in reduced power mode. Therefore, the aperture unit is driven based on a drive command from the communication unit 210. The image stabilization lens unit and locking mechanism do not receive drive commands from the imaging device body C. Because the power supplied from the imaging device body is insufficient to drive the zoom lens unit and focus lens unit in parallel, the lens device 100 gives priority to the zoom lens unit and drives it exclusively (operates in reduced power mode). The operation of the image stabilization lens unit and locking mechanism will be described in detail later.

[0048] 10(b) shows the driving of optical members in the lens device 100 in response to drive commands from sources other than the communication unit 210. Here, drive commands from sources other than the communication unit 210 include, for the zoom lens unit 102, drive commands based on operation of the zoom switch 133 or the zoom controller 20. For the focus lens unit 105, drive commands based on operation of the focus controller 10. For the shake correction lens unit 103 and the locking mechanism 104, drive commands based on operation of the shake correction switch 132. For the aperture unit 114, drive commands based on the operation ring 130 may be present if the operation ring 130 is set for aperture unit operation.

[0049] For image capture device body A, the lens apparatus 100 operates in full drive mode because the power supplied from the image capture device body is sufficient. For image capture device body B, the power supplied from the image capture device body is insufficient to drive all optical components in parallel, so the lens apparatus 100 operates in partial drive mode, which prohibits driving of the focus lens unit. For image capture device body C, the lens apparatus 100 drives the aperture unit. For image capture device body C, the power supplied from the image capture device body C is insufficient to drive the zoom lens unit and focus lens unit in parallel, so the lens apparatus 100 gives priority to exclusively driving the zoom lens unit (operates in low-power mode). The lens apparatus 100 drives the shake correction lens (switches drive ON / OFF) based on the operation of the shake correction switch 132. The lens apparatus 100 drives the locking mechanism in synchronization with power ON / OFF. This reduces the number of times the locking mechanism is driven, thereby reducing power consumption. Details of locking mechanism drive will be described later.

[0050] <Control of image stabilization lens unit and locking mechanism> FIG. 10 illustrates the state transitions of the shake correction lens and the locking mechanism. (a) in the figure shows the operation of the shake correction lens unit 103 and the locking mechanism 104 in full drive mode. The top row of the table shows the states of the imaging device, which, from left to right, show the state when the imaging device body 200 is powered on, the state when the shake correction switch 132 is on, the state when the shake correction switch 132 is off, and the state when the imaging device body 200 is powered off. The middle row of the table shows the state of the shake correction lens unit 103, and the bottom row of the table shows the state of the locking mechanism 104. When the shake correction switch 132 is on (IS ON), the shake correction lens unit 103 is in a shake correction state, and when the shake correction switch 132 is off (IS OFF), the shake correction lens unit 103 is in a non-shake correction state (held in the initial position). When the power is on, the locking mechanism 104 follows the state of the shake correction switch 132. The locking mechanism 104 is in an unlocked state when the shake correction switch 132 is in the ON state, and in a locked state when the shake correction switch 132 is in the OFF state. The locking mechanism 104 is in a locked state when the power is turned OFF. Here, a drive unit (actuator) operates to switch the locking mechanism 104 between locked and unlocked. The operation of the shake correction lens unit 103 and the locking mechanism 104 in the partial drive mode is also similar.

[0051] (b) of the same figure shows the operation of the shake correction lens unit 103 and locking mechanism 104 in the reduced power mode. The operation of the shake correction lens unit 103 is the same as in the full drive mode. When the power to the imaging device body 200 is on, the locking mechanism 104 is in an unlocked state regardless of the state of the shake correction switch 132. When the power is off, the locking mechanism 104 is in a locked state. This control makes it possible to reduce the number of locking operations and thereby reduce power consumption, or to increase the power allocated to driving other optical members.

[0052] The above-described configuration provides a lens device, an imaging device body, an imaging device, and a program that are advantageous in realizing compatibility with conventional devices (models) and in realizing expanded functions in the imaging device. Note that in the reduced power mode, the drive speed of the optical elements may be reduced instead of or in addition to exclusive drive control of the optical elements. Furthermore, while an example of updating information transmitted from the lens device to the imaging device body using the imaging device configuration has been shown, the same configuration may also be used to update information transmitted from the imaging device body to the lens device.

[0053] [Embodiment 2] In this embodiment, an example is shown in which drive of an optical element is limited in accordance with the power consumption of a drive unit. FIG. 11 illustrates an example configuration of a control unit in a lens device and a control unit in an imaging device body. In the figure, the control unit 111 further includes a current detection unit 143. The current detection unit 143 detects the current (drive current) in each of the drive circuits 119, 120, 121, 124, and 125, and outputs information about the current to the power control unit 142. FIG. 12 illustrates an example of the flow of power control processing. The current threshold value described below is a threshold value related to the current that is set based on the power supplied from the power supply unit 208. The current threshold value can be stored in the control unit 111. In the figure, first, in step S901, the current detected by the current detection unit 143 is acquired. In step S902, it is determined whether the current acquired in S901 is smaller than the current threshold value. If the current is smaller than the current threshold value, the process ends. If the current is not smaller than the current threshold value, the process proceeds to step S903. In step S903, driving of the focus lens unit 105 is prohibited, and the process ends. This process is repeated.

[0054] With the above configuration, when the drive current exceeds the current threshold, driving of the focus lens unit 105 is prohibited, thereby preventing power consumption from exceeding a predetermined power. Note that the drive of the focus lens unit 105 is not limited to being prohibited, and the drive of other optical members may also be prohibited. Instead of or in addition to prohibiting the drive of the optical member, the drive speed of the optical member may be reduced. Furthermore, instead of or in addition to detecting the drive current, other physical quantities related to power consumption may be detected.

[0055] [Embodiment 3] This embodiment illustrates an example of the configuration of an imaging device in which an (intermediate) adapter device serving as a lens device is attached between an interchangeable lens device and an imaging device body. FIG. 13 illustrates an example of the configuration of an imaging device according to this embodiment. The adapter device 500 may include optical components arranged on the optical path between the interchangeable lens device and the imaging device body. The adapter device 500 may be, for example, an extension tube for changing the back focal length or an extender for changing the imaging magnification. The adapter device 500 includes a control unit 501 (adapter microcomputer), a communication unit 502, a power supply unit 503, an AF / MF switch 504, and a communication switch 505. The control unit 501 controls the operation of each unit within the adapter device 500. The AF / MF switch 504 is a switch for switching between an AF (autofocus) state and an MF (manual focus) state. The AF state is a state in which the focus lens unit 105 is driven based on a drive command from the imaging device body 200. The MF state is a state in which the focus lens unit 105 is operated by an operation ring or a (remote) focus controller 10 (focus demand) provided on the lens apparatus 100. The state of the communication switch 505 is detected by the control unit 501, and information about this state is transmitted to the imaging device body 200 via the communication unit 502. Based on this state information, the imaging device body 200 determines whether the focus lens unit 105 can be driven from the imaging device body 200. This state information is also transmitted to the lens apparatus 100 via the communication unit 502 or the communication unit 210. In this embodiment, the adapter device 500 is provided with an AF / MF switch 504 having a function similar to that of the AF / MF switch 135 in Embodiment 1. The AF / MF switch may be provided in the lens apparatus or the imaging device body.

[0056] Information indicating that the adapter device 500 is equipped with a communication switch 505 is transmitted from the communication unit 502 to the communication unit 210. Information regarding the state of the communication switch 505 is transmitted from the communication unit 502 to the communication unit 210. The imaging device body 200 can detect that the lens device 100 and the adapter device 500 are equipped with AF / MF switches. If both the lens device 100 and the intermediate adapter device 500 are equipped with AF / MF switches, operation of the AF / MF switch equipped on the lens device 100 takes priority. Note that, when the imaging device is started up, communication can be performed between the communication unit 140 and the communication unit 210 by shorting (closing) the communication line between the communication unit 140 and the communication unit 502 with the communication switch 505. Note that, when communication is performed only between the communication unit 502 and the communication unit 210, the communication switch 505 can be opened.

[0057] <Power supply and communications> The lens device 100 and the adapter device 500 are mechanically and electrically connected via the mount 300. The adapter device 500 and the imaging device body 200 are mechanically and electrically connected via the mount 400. The adapter device 500 is supplied with power from the power supply unit 208 via a power terminal provided on the mount 400. The lens device 100, the imaging device body 200, and the adapter device 500 communicate with each other via communication terminals provided on the mounts 300 and 400. The control unit 501 receives commands and information transmitted from the communication unit 210 via the communication unit 502. The control unit 501 can also receive communication information between the communication unit 140 and the communication unit 210. The control unit 501 controls each unit of the adapter device 500 based on the received commands.

[0058] 14 is a diagram showing an example of the configuration of the control unit in the lens device, the control unit in the adapter device, and the control unit in the imaging device body. The control unit 111 is configured to include a communication unit 140 and a drive control unit 141. The control unit 501 is configured to include a communication unit 502. The communication unit 502 stores information communicated between the communication unit 140 and the communication unit 210 during initial communication. If the adapter device 500 needs to change the information transmitted from the communication unit 140, the communication unit 502 changes the information and transmits it to the communication unit 210. The change of the information by the communication unit 502 will be described later. The configuration of the control unit 207 is the same as that in the first embodiment.

[0059] 15 is a diagram illustrating an example of information transmitted in initial communication. In this embodiment, the lens device 100 does not have an AF / MF switch, so information A4 in (c) of the same figure is "no" (not possible) for any imaging device body in the initial communication and in subsequent communication.

[0060] FIG. 16 is a diagram illustrating the flow of initial communication processing. After the communication unit 140 performs initial communication again to change the lens device information A and B as in the first embodiment, it is assumed that the communication unit 140 will not perform additional initial communication to further change the lens device information A and B. The processing in FIG. 16 starts from a state in which the communication line is shorted by the communication switch 505 and communication is being performed between the communication unit 140 and the communication unit 210. In FIG. 16, first, in step S1001, it is determined whether the communication unit 501 has received information from the communication unit 140 indicating that the lens device information A has been changed. If the information has been received, the processing proceeds to step S1002. In step S1002, it is determined whether a command requesting the information A has been received from the communication unit 210. If the command has been received, the processing proceeds to step S1003. In step S1003, the imaging device body information A transmitted from the communication unit 210 is acquired, and the lens device information A transmitted from the communication unit 140 is acquired, and then the process proceeds to step S1004.

[0061] In S1004, it is determined whether a command requesting information B has been received from communication unit 210, and if the command is received, processing proceeds to step S1005. In step S1005, image capture device body information B transmitted from communication unit 210 is acquired, and lens apparatus information B transmitted from communication unit 140 is acquired, and then processing proceeds to step S1006. In step S1006, it is determined from the acquired image capture device body information whether communication unit 210 supports the drive command for focus lens unit 105. If communication unit 210 supports the drive command, processing proceeds to step S1007, and if communication unit 210 does not support the drive command, processing proceeds to step S1010. Here, whether communication unit 210 supports the drive command is determined based on whether either image capture device body information A2 or B1 is set to "supported."

[0062] In step S1007, it is determined from the acquired lens device information whether the focus lens unit 105 can be driven. If the drive is possible, the process proceeds to step S1008; if the drive is not possible, the process ends. Here, the determination of whether the focus lens unit 105 can be driven is made based on the lens device information A3. In step S1008, it is determined whether AF / MF switch state information can be transmitted. If the information can be transmitted, the process proceeds to step S1009; if the information cannot be transmitted, the process ends. Here, the determination of whether the information can be transmitted is made based on whether a drive command for the focus lens unit 105 can be sent from the communication unit 210 and whether the lens device 100 is equipped with an AF / MF switch. Therefore, if a drive command for the focus lens unit 105 can be sent from the communication unit 210 but transmission of AF / MF switch state information is not possible (not possible), this means that the lens device 100 does not have an AF / MF switch. In step S1009, it is determined that lens device information A4 indicates "Yes," and processing proceeds to step S1010. In step S1010, communication switch 505 is opened, and processing proceeds to step S1011. Here, when communication switch 505 is opened, communication unit 502 and communication unit 210 enter a state in which they can communicate with each other, and communication unit 140 and communication unit 210 enter a state in which they cannot communicate with each other.

[0063] In step S1011, it is determined whether a command confirming whether the lens device information A will be changed has been received from the communication unit 210. If the command has been received, the process proceeds to step S1012; if the command has not been received, the process returns to S1011. Here, the communication unit 210 periodically or repeatedly transmits the command. In step S1012, information indicating that the lens device information A will be changed is transmitted to the communication unit 210, and the process proceeds to S1013. In step S1013, it is determined whether a command requesting the lens device information A has been received from the communication unit 210. If the command has been received, the process proceeds to step S1014. In step S1014, the imaging device body information A is acquired from the communication unit 210, and the lens device information A is transmitted to the communication unit 210, and the process proceeds to step S1015. In step S1015, it is determined whether a command requesting lens apparatus information B has been received from communication unit 210, and if the command is received, processing proceeds to step S1016. In step S1016, imaging device body information B is acquired from communication unit 210, and lens apparatus information B is transmitted to communication unit 210, and processing proceeds to S1017. In step S1017, communication switch 505 is closed, and processing ends. Here, when communication switch 505 is closed, communication unit 140 and communication unit 210 are able to communicate with each other.

[0064] After the initial communication between the communication unit 502 and the communication unit 210 has been performed as described above, lens device information changed by the attachment of the adapter device 500 can be communicated between the communication unit 502 and the communication unit 210. Therefore, even when the adapter device 500 is attached, the imaging device body 200 can control (drive) the lens device 100 and the adapter device 500 based on the lens device information corresponding to that case. The adapter device 500 may also be configured to change the interchangeable lens device information. The adapter device 500 may also be provided with other switches and operating members, and may also be provided with optical members and drive units for those optical members.

[0065] The adapter device 500 may control the communication switch 505 as necessary to allow communication between the communication unit 502 and the communication unit 210. In this case, the state of the communication switch 505 is preferably transmitted from the communication unit 502 to the communication unit 210.

[0066] The above-described configuration provides a lens device, an imaging device body, an imaging device, and a program that are advantageous in realizing compatibility with conventional devices (models) and in realizing expanded functions in the imaging device. While the configuration of the imaging device has been described as an example in which information transmitted from the lens device to the imaging device body is updated, the configuration may also be used to update information transmitted from the imaging device body to the lens device. Furthermore, the adapter device 500 is not limited to having expanded functions and updating lens device information; the interchangeable lens device 100 may have expanded functions and the adapter device 500 may update lens device information. Furthermore, for example, if the lens device 100 does not support the reduced power mode, the adapter device 500 may have the functionality of the power control unit 142 and may impose drive restrictions on drive commands from the communication unit 210. In this way, the adapter device 500 may be responsible for expanding functions in the imaging device instead of or in addition to the lens device 100.

[0067] Furthermore, the communication method of the communication unit 140 and the communication method of the communication unit 210 may be different, and the adapter device 500 may convert between the two different communication methods. In this case, for example, the communication unit 502 may communicate with the communication unit 140 using a first communication method and with the communication unit 210 using a second communication method.

[0068] [Embodiment 4] One or more functions of the above-described embodiments can also be realized by a program that implements the program. The program can be supplied to a device or system via a network or a storage medium, and can be read and executed by one or more processors in the computer of the device or system. The function can also be implemented by a circuit (e.g., an ASIC) that implements the program.

[0069] 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 are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0070] 100 Lens device 111 Control Unit

Claims

1. A lens device that is detachably attached to an imaging device, a control unit that communicates with the imaging device regarding driving of an optical member; The control unit receiving first information that identifies the imaging device transmitted from the imaging device, and transmitting second information that identifies the lens device to the imaging device; Identifying the type of the main body of the imaging device based on the first information; a lens device configured to transmit third information obtained by changing at least a part of the second information so as to correspond to the identified type to the imaging device;

2. 2. The lens device according to claim 1, further comprising: the optical member; and a driving section for driving the optical member.

3. 3. The lens device according to claim 1, wherein the second information includes information for identifying the lens device.

4. 4. The lens device according to claim 1, wherein the second information includes information on whether the optical member can be driven from the imaging device.

5. 5. The lens device according to claim 1, wherein the second information includes information indicating that the optical member cannot be driven from the imaging device, and the third information includes information indicating that the optical member can be driven from the imaging device.

6. 5. The lens device according to claim 4, wherein the information from the imaging device indicating that the optical member can be driven includes information regarding limitations on the driving of the optical member.

7. 7. The lens device according to claim 6, wherein the control unit limits the driving of the optical member by controlling a drive unit that drives the optical member based on the type.

8. The optical system includes a plurality of optical members and a plurality of driving units for driving the plurality of optical members, 8. The lens device according to claim 1, wherein the third information includes information relating to whether or not the control unit can exclusively control the plurality of drive units.

9. 9. The lens device according to claim 1, wherein the third information includes information relating to whether or not the control unit can limit the drive speed of the optical member.

10. a movable optical member for reducing image blur and a limiting mechanism for limiting the drive of the optical member; The lens device according to claim 6 , wherein the control unit controls the limiting mechanism to limit the drive of the optical member based on the type.

11. 11. The lens device according to claim 1, wherein the optical member includes at least one of a lens group movable for zooming, a lens group movable for focusing, a lens group movable for reducing image blur, or an aperture stop.

12. the lens device has a movable optical member and a drive unit that drives the optical member, and is detachably mounted between the imaging device and an interchangeable lens device that is detachably mounted to the imaging device; 12. The lens device according to claim 1, wherein the control unit performs communication with the interchangeable lens device and the imaging device regarding the driving of the optical member.

13. 13. The lens device according to claim 12, further comprising an optical member disposed on an optical path between the interchangeable lens device and the imaging device.

14. An imaging system including the lens apparatus according to any one of claims 1 to 13 and the imaging device, The imaging system is characterized in that the imaging device has an imaging element that captures an image formed through the lens device.

15. An imaging device to which a lens device is detachably attached, a control unit that communicates with the lens device regarding driving of an optical member; The control unit transmitting first information identifying the imaging device to the lens device, and receiving second information identifying the lens device transmitted from the lens device; receiving, from the lens device, information indicating that the second information has been changed, a request to the lens device to transmit third information that identifies the lens device in accordance with a type of a main body of the imaging device; The imaging device according to claim 1, wherein the third information, which is obtained by changing at least a part of the second information, is received from the lens device.

16. The imaging device according to claim 15; a lens device detachably attached to the imaging device, The imaging device includes an imaging element that captures an image formed through the lens device.

17. 1. A program for causing a computer to execute a method for controlling communication between a lens device detachably attached to an imaging device and the imaging device, the program comprising: In the method, receiving first information that identifies the imaging device transmitted from the imaging device, and transmitting second information that identifies the lens device to the imaging device; Identifying the type of the main body of the imaging device based on the first information; a program for transmitting third information obtained by changing at least a part of the second information so as to correspond to the identified type to the imaging device;

Images