Lens assembly, image pickup device, image pickup device body, and storage medium

Abstract

This invention discloses a lens assembly, an image pickup device, an image pickup device body, and a storage medium. The lens assembly, detachably attached to the image pickup device body, includes a controller configured to communicate with the image pickup device body regarding the driving of optical components. The controller is configured to send second information for identifying the lens assembly to the image pickup device body based on first information sent from the image pickup device body for identifying the image pickup device body, and to send fourth information for identifying the lens assembly to the image pickup device body based on third information sent from the image pickup device body for identifying the image pickup device body after the sending of the second information.

Description

Technical Field

[0001] The embodiments relate to a lens device, an image pickup device, an image pickup device body, and a storage medium. Background Technology

[0002] A conventional imaging device (also known as an image pickup device) comprises an imaging device body (also known as an image pickup device body or camera body) and an interchangeable lens assembly. In the imaging device, information from the interchangeable lens assembly is sent to the imaging device body, and based on this information, the imaging device body sends commands to the interchangeable lens assembly to drive the optical components within the interchangeable lens assembly.

[0003] When a new function is added to an imaging device, in one embodiment, the new function is implemented if both the imaging device body and the interchangeable lens device support the new function, while the imaging device is compatible with conventional devices that do not support the new function. Japanese Patent Application Publication No. 2009-53523 discusses an imaging device that has a newly added function while maintaining compatibility with conventional devices.

[0004] To maintain compatibility with conventional devices, communication between the imaging device body supporting the new function and the interchangeable lens device can initially be achieved by sending and receiving information according to conventional rules that do not define the new function. Therefore, since the interchangeable lens device cannot identify the imaging device body through the sending and receiving of information, it cannot implement the new function. Summary of the Invention

[0005] A lens assembly detachably attached to an image pickup device body includes an optical component and a controller configured to perform communication with the image pickup device body regarding the drive of the optical component. The controller is configured to send second information for identifying the lens assembly to the image pickup device body based on first information sent from the image pickup device body for identifying the image pickup device body, and to send fourth information for identifying the lens assembly to the image pickup device body based on third information sent from the image pickup device body for identifying the image pickup device body after the sending of the second information.

[0006] Further features of the invention will become clear from the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0007] Figure 1 An example of the configuration of an imaging apparatus according to a first exemplary embodiment is illustrated.

[0008] Figure 2An example of the corresponding configuration of the control unit in the lens device and the control unit in the imaging device body according to a first exemplary embodiment is illustrated.

[0009] Figure 3 An example of clock synchronization communication according to a first exemplary embodiment is illustrated.

[0010] Figure 4A , 4B Figures 4C illustrate an example of information to be sent in initial communication according to a first exemplary embodiment.

[0011] Figure 5 This is a flowchart illustrating an example of the initial communication process according to a first exemplary embodiment.

[0012] Figure 6 This is a flowchart illustrating an example of the process for selecting a drive mode according to a first exemplary embodiment.

[0013] Figure 7 This is a flowchart illustrating an example of zoom drive processing in a power-saving mode according to a first exemplary embodiment.

[0014] Figure 8 This is a flowchart illustrating an example of focus drive processing in a power-saving mode according to a first exemplary embodiment.

[0015] Figure 9A and 9B Examples of driving optical components for each type of imaging device body according to a first exemplary embodiment are illustrated.

[0016] Figure 10A and 10B An example of the state transition of the image stabilizing lens and locking mechanism according to a first exemplary embodiment is illustrated.

[0017] Figure 11 An example of the corresponding configuration of the control unit in the lens device and the control unit in the imaging device body according to the second exemplary embodiment is illustrated.

[0018] Figure 12 This is a flowchart illustrating an example of power control processing according to a second exemplary embodiment.

[0019] Figure 13 An example of the configuration of an imaging apparatus according to a third exemplary embodiment is illustrated.

[0020] Figure 14 Examples of corresponding configurations of the control unit in the lens device, the control unit in the adapter device, and the control unit in the imaging device body according to a third exemplary embodiment are illustrated.

[0021] Figure 15A , 15B Figures 15C illustrate an example of information to be sent in the initial communication according to a third exemplary embodiment.

[0022] Figure 16 This is a flowchart illustrating an example of the initial communication process according to a third exemplary embodiment. Detailed Implementation

[0023] Exemplary embodiments of this disclosure will now be described with reference to the accompanying drawings. Throughout all the drawings used to illustrate exemplary embodiments, as a rule (unless otherwise specifically described), the same elements are assigned the same reference numerals, and redundant descriptions will be omitted.

[0024] <Imaging Device Configuration>

[0025] Figure 1 An example configuration of an imaging apparatus according to a first exemplary embodiment is illustrated. (Reference) Figure 1 The lens assembly 100 is a replaceable lens assembly that can be attached to and detached from the imaging device body 200. The lens assembly 100 includes optical components, namely a lens unit (lens group) 101, a movable lens unit 102 for zooming, and an aperture stop unit (aperture stop) 114 for adjusting light intensity, arranged sequentially from the subject OBJ side. The lens assembly 100 also includes an image stabilizing lens unit 103 that corrects (reduces) image shake caused by camera shake (such as camera shake) of the lens assembly 100; and a locking mechanism 104 (fixing or limiting mechanism) that holds (fixes or limits) the lens unit 103 in its initial position. The lens assembly 100 includes a focusing lens unit 105 for focusing (focus adjustment). The image stabilizing lens unit 103 can also be used as a movable lens unit for zooming.

[0026] Zoom lens unit 102 and focusing lens unit 105 are held by holding members 106 and 107, respectively. Holding members 106 and 107 are movably guided along the optical axis O and are driven by drive units 108 and 109, respectively. Drive units 108 and 109 each include a stepper motor and drive zoom lens unit 102 and focusing lens unit 105 synchronously with drive pulses, respectively. Image stabilizing lens unit 103 is movably guided in a drive direction perpendicular to the optical axis O and is then driven by drive unit 126 (also referred to as a drive device or actuator). Locking mechanism 104 enters a locked state and an unlocked state via drive unit 110. Drive unit 110 includes, for example, a stepper motor and enables locking mechanism 104 to be maintained in the locked or unlocked state without the use of electricity by using the positioning torque (self-holding force) at the stable position. Drive unit circuit 125 (driver) is the circuit that drives drive unit 110.

[0027] The control unit 111 (also called a controller or lens microcomputer) controls the operation of each unit in the lens assembly 100. The control unit 111 includes a communication unit 140 and receives drive commands and transmission request commands sent from the imaging device body 200 via the communication unit 140. The control unit 111 controls the drive of the optical components based on the drive commands and sends information stored in the lens assembly 100 to the imaging device body 200 based on the transmission request commands.

[0028] When the lens assembly 100 is activated, the communication unit 140 sends information for identifying the lens assembly 100 and information about the functions supported by the lens assembly 100 to the communication unit 210 in the imaging device body 200. The communication unit 210 sends the same information to the communication unit 140 in the lens assembly 100. For example, this initial communication enables the imaging device body 200 and the lens assembly 100 to exchange information about each other, such as information about the optical components used to drive the lens assembly 100.

[0029] The initial communication will be described in detail below.

[0030] The aperture unit 114 may include, for example, aperture blades 114a and 114b.

[0031] The corresponding states of the aperture blades 114a and 114b are detected, for example, by a detection unit 115 including a Hall element, and the detection signal is input to the control unit 111 via an amplifier 122 and an analog-to-digital converter (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 (also referred to as a drive unit or drive device) based on the drive signal. The actuator 113 drives the aperture unit 114 in this way, and as a result, adjusts the amount of light.

[0032] The lens assembly 100 includes an operation ring 130, an operation amount detection unit 131, an image stabilization switch 132, and a zoom switch 133. The operation amount detection unit 131 may include, for example, two optical circuit breakers (encoders) that output two-phase signals based on the rotation of the operation ring 130, and detects the operation amount of the operation ring 130. The image stabilization switch 132 may be, for example, a slide switch, and is used to switch the operation of the image stabilization lens unit 103 between an ON state and an OFF state. The zoom switch 133 may be, for example, a rocker switch, and is used to drive the zoom lens unit 102. Multiple pieces of information regarding the operation amount of the operation ring 130, the state of the image stabilization switch 132, and the state of the zoom switch 133 are input to the control unit 111. The control unit 111 may transmit the operation amount of the operation ring 130 to the control unit 207 in the imaging device body via the communication unit 140.

[0033] The operation target to be operated by the operation ring 130 can be changed based on the settings of the imaging device body 200. For example, the operation target may include aperture stop, focus, zoom, and shutter speed.

[0034] The operation target can be set using a switch and display unit 205 (display) provided on the imaging device body 200. The control unit 207 of the imaging device body 200 generates a drive command based on the operation amount received from the control unit 111 of the lens assembly 100 via the operation loop 130, and sends 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. When the shutter speed is set to the operation target of the operation loop 130, the control unit 207 adjusts the shutter speed based on the operation amount received from the control unit 111 via the operation loop 130.

[0035] As zoom switch 133, a known switch capable of operating the drive speed and drive direction of zoom lens unit 102 can be used. Control unit 111 drives actuator 126 (which may include a voice coil motor) via drive circuit 124 based on jitter of the imaging device detected by a jitter sensor such as a vibration gyroscope. When image stabilization switch 132 is set to on, control unit 111 performs image stabilization control. Conversely, when image stabilization switch is set to off, control unit 111 does not perform image stabilization control. Autofocus / manual focus (AF / MF) switch 135 is used to switch between AF and MF states.

[0036] In AF mode, the focusing lens unit 105 is driven based on a drive command from the imaging device body 200. In MF mode, the focusing lens unit 105 is operated via the operating ring 130 provided on the lens assembly 100 and the (remote) focus controller 10 (e.g., focus demand). The status of the AF / MF switch 135 is detected by the control unit 111, and the status information is sent to the imaging device body 200 via the communication unit 140. Based on this information, the control unit 207 determines whether the imaging device body 200 can control the drive of the focusing lens unit 105, i.e., AF control.

[0037] A focus controller 10 and a (remote) zoom controller 20 (e.g., zoom demand) can be connected to the lens assembly 100. The focus controller 10 includes a rotary operating member (e.g., a knob) and outputs a drive command to the lens assembly 100 based on the amount of operation of the operating member for driving the focusing lens unit 105. The zoom controller 20 includes a rocker operating member and outputs a drive command to the lens assembly 100 based on the amount of operation of the operating member for driving the zoom lens unit 102. The control unit 111 outputs a drive signal to a corresponding one of the drive circuits 119 and 120 based on the drive command to operate the drive unit 108 or 109. Therefore, zoom operation is performed by the zoom lens unit 102, and focusing operation is performed by the focusing lens unit 105.

[0038] The imaging device main body 200 includes an image sensor 201 (e.g., a charge-coupled device (CCD) sensor or a complementary metal-oxide-semiconductor (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 controller or camera microcomputer) 207, a communication unit 210, and a power supply unit 208. An (optical) image of the subject OBJ is captured by the image sensor 201, and the image of the subject OBJ is displayed by the display unit 205. Reflected light from the subject OBJ is incident on the image sensor 201 via a lens unit 101, a zoom lens unit 102, an aperture unit 114, an image stabilizing lens unit 103, and a focusing lens unit 105. The image sensor 201 captures, i.e., the image formed by photoelectric conversion via the optical system of the lens assembly 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 includes a phase difference sensor. Phase difference information corresponding to the defocus amount acquired 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 types of image processing based on the digital signal from the A / D converter 202 to generate a video image signal. The signal processing unit 203 also generates information regarding the contrast of the video image signal, the amount of defocus based on the phase difference information, and the brightness of the video image signal. The signal processing unit 203 outputs the video image signal to the display unit 205, and the display unit 205 displays a real-time view image based on the video image signal.

[0039] The zoom switch 206 of the imaging device body 200 can be a push-button switch. The control unit 207 generates a drive command for driving the zoom lens unit 102 based on the operation of the zoom switch 206 and sends the drive command to the control unit 111. The drive speed of the zoom lens unit 102 based on the operation of the zoom switch 206 can be set using a switch and a display unit 205 (display) provided on the imaging device body 200. The control unit 111 outputs a drive signal based on the drive command to the drive circuit 119 to operate the drive unit 108.

[0040] Control unit 207 sends a drive command for the aperture stop based on brightness information and an AF drive command based on contrast and phase difference information to control unit 111 via communication unit 210. Control unit 207 can adjust the amount of light by determining a combination of the shutter speed of the imaging device body 200 and the aperture value of the aperture unit 114 of the lens device 100 based on brightness information. Focus adjustment operation can be performed by generating a drive command for driving the focusing lens unit 105 based on the sensitivity (depending on focal length and object distance) and defocus amount, so that the defocus amount is set to zero. Control unit 111 outputs a drive signal based on the drive command to drive circuit 120 to operate drive unit 109. Control unit 111 can control the drive of the corresponding optical components based on the operation amount of operation ring 130 or the operation of zoom switch 206.

[0041] <Communication between the imaging device body and the lens assembly>

[0042] The lens assembly 100 and the imaging device body 200 communicate with each other via communication terminals provided on the mount unit 300 to exchange commands and information. For example, in the initial communication, the lens assembly 100 and the imaging device body 200 acknowledge the corresponding commands they support. After acknowledgment, the commands supported by the lens assembly 100 are sent from the communication unit 210 to the communication unit 140. The operation for acknowledging commands between the lens assembly 100 and the imaging device body 200 will be described below.

[0043] <Power Supply>

[0044] The lens assembly 100 and the imaging device body 200 are mechanically and electrically connected to each other via a support unit 300. The power supply unit 134 of the lens assembly 100 draws power from the power supply unit 208 of the imaging device body 200 via power terminals provided on the support unit 300, and supplies power to each unit (each drive unit and control unit 111) in the lens assembly 100. Depending on the type of the imaging device body 200, the imaging device body 200 may not be able to supply enough power to simultaneously (concurrently) drive all drive units of the lens assembly 100. According to the first exemplary embodiment, an imaging device body capable of supplying power to simultaneously drive all drive units of the lens assembly 100 is referred to as imaging device body A. An imaging device body that cannot supply power to simultaneously drive all drive units and does not conform to the drive commands of each drive unit is referred to as imaging device body B. An imaging device body that cannot supply power to simultaneously drive all drive units but conforms to the drive commands of each drive unit is referred to as imaging device body C.

[0045] When the external power supply 30 is connected to the lens assembly 100, it can obtain power to drive all drive units simultaneously, regardless of the type of the imaging device body 200.

[0046] The lens assembly 100 determines the information to be sent to the imaging device main body 200 based on the type of the imaging device main body 200, and then sends the information to the imaging device main body 200. The lens assembly 100 controls the drive unit according to the supplied power. The determination of information and drive control will be described in detail below.

[0047] Figure 2 An example configuration of the control unit 111 in the lens assembly 100 and the control unit 207 in the imaging device body 200 is illustrated. 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 drive commands based on the output from the power control unit 142 (described below). The power control unit 142 selects a drive mode (described below) according to the configuration of the imaging device and performs power control (control of the power for drive) according 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 controls related to image capture, such as determining the combination of the shutter speed and the aperture value of the aperture unit 114 described above, generating focus correction amounts (i.e., drive commands) in AF operation, and generating drive commands based on the operation of the zoom switch 206.

[0048] <Clock Synchronization Communication>

[0049] Figure 3 The illustration shows an example of clock synchronization communication. Figure 3The diagram illustrates the waveforms of the clock line LCLK, data line DCL, and data line DLC during clock-synchronized communication between communication units 140 and 210. Communication unit 210 outputs a clock signal to the clock line LCLK and, in sync with the rising edge of the clock signal, outputs 8 bits of data B7 to B0 to the data line DCL. Communication unit 140 outputs 8 bits of data B7 to B0 to the data line DLC in sync with the rising edge of the clock signal. Communication unit 210 receives 8 bits of data B7 to B0 from the data line DLC in sync with the rising edge of the clock signal. Similarly, communication unit 140 receives 8 bits of data B7 to B0 from the data line DCL in sync with the rising edge of the clock signal. As described above, communication units 210 and 140 exchange communication data. When communication unit 140 receives 8 bits of data B7 to B0 from the data line DCL, the potential of the clock line LCLK is set to a low level during the time period Tbusy. During the time period Tbusy, the lens device 100 processes the received data, and communication unit 210 does not perform data transmission. The flow of communication data can be controlled in this way. Repeating the aforementioned process enables the exchange of data (information) between communication units 210 and 140.

[0050] Initial Communication

[0051] Figure 4A , 4B The diagram 4C illustrates an example of the information to be sent in the initial communication. Figure 4A The diagram illustrates the configuration of information to be transmitted by the imaging device body 200 and information to be transmitted by the lens device 100.

[0052] These messages can be the aforementioned 8 bits of data used in clock synchronization communication. These messages are... Figure 4A The “communication order” shown is used for transmission (sending).

[0053] The information to be sent by the lens assembly 100 includes information A and B (information used to identify the lens assembly 100). Information A (lens assembly information A) includes lens assembly information A1, A2, A3, and A4. Lens assembly information A1, A2, and A3 respectively indicate whether the imaging device body 200 can drive the aperture stop unit 114, zoom lens unit 102, and focusing lens unit 105. Lens assembly information A4 indicates whether the state of the AF / MF switch 135 can be sent. Whether each unit can be driven indicates whether each unit can be driven according to drive commands A and B (described below).

[0054] Information B (Lens Information B) includes lens assembly information B1, B2, B3, and B4. Lens assembly information B1 indicates information regarding conformity with the imaging device body C. Lens assembly information B2, B3, and B4 respectively indicate whether the imaging device body 200 can drive the aperture stop unit 114, zoom lens unit 102, and focusing lens unit 105, and whether there are any driving restrictions for each unit. The information "whether there are driving restrictions" refers to whether there is a restriction that prohibits driving a driving unit in parallel with the driving of another driving unit when the driving unit is being driven according to a driving command. The information "whether driving can be performed / whether there are driving restrictions" indicates whether driving according to driving commands A and B (described below) can be performed and whether there are any driving restrictions.

[0055] Similar to the information transmitted by the lens assembly 100, the information transmitted by the imaging device main body 200 also includes, for example, Figure 4B Information A and B are shown below. Information A (Imaging Device Body Information A) includes imaging device body information A1 and A2. Imaging device body information A1 indicates the power level to be supplied from the imaging device body 200 to the lens assembly 100. Imaging device body information A2 indicates information regarding the conformity of the imaging device body 200 with drive command A. Information B (Imaging Device Body Information B) includes imaging device body information B1, which indicates information regarding the conformity of the imaging device body 200 with drive command B.

[0056] Figure 4B The diagram illustrates the values ​​(contents) of imaging device body information A and B (information used to identify the imaging device body 200) corresponding to imaging device bodies A, B, and C.

[0057] Imaging device subject information A1 indicates a high level for imaging device subject A and a low level for imaging device subjects B and C. Imaging device subject information A2 indicates that imaging device subject A conforms to drive command A, while imaging device subjects B and C do not conform to drive command A. Imaging device subject information B1 indicates that imaging device subject C conforms to drive command B, while imaging device subjects A and B do not conform to drive command B. Drive commands A and B differ from each other, for example, in their resolution and type.

[0058] Figure 4CThe illustration shows information A and B to be sent in the initial communication before the lens assembly 100 identifies the imaging device body 200, and information A and B to be sent regarding each of imaging device bodies A, B, and C in the communication after the lens assembly 100 identifies the imaging device body 200. In the initial communication, lens assembly information A is information unrelated to the drive control of the lens assembly 100, regardless of the type of the connected imaging device body 200. For example, lens assembly information A indicates that the drive of each optical component is disabled (cannot be performed). This is intended to prevent excessive power consumption in the parallel drive of multiple optical components when the power level supplied from the imaging device body 200 is low. Information to be sent in the initial communication indicates that AF / MF switch status information cannot be sent.

[0059] In the communication following the identification of the imaging device body 200 by the lens assembly 100, lens assembly information A indicates whether each optical component can be driven, which is determined for each of the imaging device bodies A, B, and C. For imaging device body A, lens assembly information A indicates that all optical components can be driven and AF / MF switch status information can be sent. For imaging device body B, lens assembly information A indicates that all optical components cannot be driven and AF / MF switch status information cannot be sent. For imaging device body C, lens assembly information A indicates that all optical components can be driven and AF / MF switch status information can be sent.

[0060] In the initial communication, lens assembly information B1 indicates that the lens assembly does not conform to the imaging device body C. In the initial communication, lens assembly information B2, B3, and B4 indicate that driving each corresponding optical component is not possible. In subsequent communications after the lens assembly 100 identifies the imaging device body 200, lens assembly information B1 indicates conformity with camera C for all types of imaging device bodies 200. Lens assembly information B2, B3, and B4 indicate whether driving each corresponding optical component is possible for imaging device body A. Lens assembly information B2, B3, and B4 indicate that driving each corresponding optical component is not possible for imaging device body B. Lens assembly information B2, B3, and B4 indicate that driving each corresponding optical component is possible for imaging device body C, but there are driving limitations. Imaging device body C conforms to driving command B, but the power level is set to a low level, preventing imaging device body C from supplying sufficient power to drive the zoom lens unit 102 and the focusing lens unit 105 in parallel. Therefore, there are driving limitations for driving each optical component.

[0061] Figure 5 This is a flowchart illustrating an example of the initial communication process. This process can be executed by control unit 111. (Reference) Figure 5In step S101, the control unit 111 retrieves lens device information A and B from its internal or external storage unit. In step S102, the control unit 111 determines whether it has received a command requesting information A from the communication unit 210. If the command is received (yes in step S102), the process proceeds to step S103. In step S103, the control unit 111 retrieves imaging device main body information A and sends lens device information A to the communication unit 210. In step S104, the control unit 111 determines whether it has received a command requesting information B from the communication unit 210. If the command is received (yes in step S104), the process proceeds to step S105. In step S105, the control unit 111 retrieves imaging device main body information B and sends lens device information B to the communication unit 210. In step S106, the control unit 111 determines whether it has received a command from the communication unit 210 confirming whether lens device information A has been changed. Upon receiving the command ("Yes" in step S106), the process proceeds to step S107. In step S107, the control unit 111 sends information indicating that lens device information A has been changed to the communication unit 210. Upon receiving the information indicating that lens device information A has been changed, the communication unit 210 sends commands requesting information A and requesting information B to the communication unit 140. In step S107, instead of sending information indicating that lens device information A has been changed, the control unit 111 may send an inconsistent or inappropriate response as a response to the information (request) sent from the imaging device body 200, or it may not send a response at all. More specifically, the process in step S107 may be a process that prompts the imaging device body 200 to retransmit the first information, which includes not performing the process.

[0062] In step S108, the control unit 111 determines whether a command requesting information A has been received from the communication unit 210. If the command has been received (yes in step S108), the process proceeds to step S109. In step S109, the control unit 111 determines whether the imaging device main body information A1 received in step S103 indicates "high". If information A1 indicates "high" (yes in step S109), the process proceeds to step S110. On the other hand, if information A1 indicates "low" (no in step S109), the process proceeds to step S111. In step S110, the control unit 111 acquires information A and B corresponding to the imaging device main body A. In step S111, the control unit 111 determines whether the imaging device main body information B1 received in step S105 indicates the imaging device main body B. If information B1 indicates the imaging device main body B (yes in step S111), the process proceeds to step S112. On the other hand, if information B1 indicates the imaging device body C (which is "No" in step S111), the process proceeds to step S113. In step S112, the control unit 111 acquires information A and B corresponding to the imaging device body B. In step S113, the control unit 111 acquires information A and B corresponding to the imaging device body C.

[0063] In step S114, the control unit 111 acquires the imaging device main body information A and sends the lens device information A corresponding to information A to the communication unit 210. Lens device information A is acquired in one of steps S110, S112, and S113. In step S115, the control unit 111 determines whether a command requesting information B has been received from the communication unit 210. If the command is received (yes in step S115), the process proceeds to step S116. In step S116, the control unit 111 acquires the imaging device main body information B and sends the lens device information B corresponding to information B to the communication unit 210. As described above, the lens device main body information A and B corresponding to the imaging device main bodies A, B, and C can be sent to the communication unit 210 based on the imaging device main body information A and B.

[0064] The lens assembly 100 and imaging device body 200 conforming to drive command B have been described above. There also exists a lens assembly 100 and imaging device body 200 conforming only to drive command A. In the case of the lens assembly 100 conforming only to drive command A, in... Figure 5 In step S103 of the flowchart, the control unit 111 identifies imaging device bodies A and B based on the imaging device body information A and obtains lens device information. Since the imaging device body 200 does not send a command requesting information B, the control unit 111 does not execute the processing in step 104 and subsequent steps, and the processing ends.

[0065] In the above processing, when the imaging device body 200 is imaging device body A, the lens device information corresponding to imaging device body A is sent to the communication unit 210. When the imaging device body 200 is imaging device body B or C, the lens device information corresponding to imaging device body B or C is sent to the communication unit 210. The processing performed when the imaging device body 200 only meets drive command A is similar to the processing performed when the lens device 100 only meets drive command A.

[0066] <Effects of this exemplary embodiment>

[0067] According to this exemplary embodiment, even if the lens device 100 determines that the imaging device body 200 is the imaging device body C after the lens device information A has been sent, the already sent lens device information A can still be updated. This allows the optical components to be driven based on the drive command B to be given to the imaging device body C. Furthermore, by sending the lens device information B, information about the drive limits of each optical component can be sent to the imaging device body 200. This allows the imaging device body 200, as the imaging device body C, to issue drive commands for each optical component under drive limits. In cases where parallel driving of multiple optical components is not possible due to power supply limitations, the control unit 111 can send information about drive limits to the control unit 207 in a communication following the initial communication. This process also enables the aforementioned effects to be achieved. Although the focusing lens unit 105 has drive limits in the above example, the configuration is not limited to this. Drive limits can be set for other optical components. Even when performing functional extensions on the imaging device as described above, compatibility with conventional devices and extended functions of the imaging device can be achieved based on the combination of the lens device 100 and the imaging device body 200.

[0068] <Drive Mode>

[0069] The following describes the process performed by the control unit 111 (power control unit 142) to determine the driving mode based on the configuration of the imaging device. The driving mode can include four different modes: full driving mode, partial driving mode, full driving disabled mode, and power saving mode. In full driving mode, the imaging device body 200 supplies sufficient power to the lens assembly 100, or an external power supply is connected to the lens assembly 100, thereby enabling the parallel driving of all optical components. In partial driving mode, the imaging device body 200 cannot supply sufficient power to drive all optical components in parallel, and no driving command is issued from the imaging device body 200. In partial driving mode, some optical components are driven such that power consumption does not exceed a predetermined power supply. In this case, the driving of the focusing lens unit 105 is disabled, and parallel driving (partial driving) of other optical components is possible. The optical components to be disabled are not limited to the focusing lens unit 105. In power saving mode, the imaging device body 200 cannot supply sufficient power to drive all optical components in parallel, and a driving command is issued from the imaging device body 200. In power-saving mode, drive control is executed to selectively drive optical components so that power consumption does not exceed a predetermined power supply. The power-saving mode will be described below.

[0070] Figure 6 This is a flowchart illustrating an example of the driver mode selection process. In this case, the initial driver mode is set to a partial driver mode. (Reference) Figure 6In step S501, it is determined whether the external power supply 30 is connected to the lens assembly 100. If it is determined that the external power supply 30 is connected to the lens assembly 100 (yes in step S501), the process proceeds to step S502. On the other hand, if it is determined that the external power supply 30 is not connected to the lens assembly 100 (no in step S501), the process proceeds to step S503. In step S502, all drive modes are set to drive mode. Then, the process ends. In step S503, it is determined whether the imaging device body 200 connected to the lens assembly 100 is not the imaging device body C. If it is determined that the imaging device body 200 is not the imaging device body C, that is, it is the imaging device body A or B (yes in step S503), the process proceeds to step S505. On the other hand, if it is determined that the imaging device body 200 is the imaging device body C (no in step S503), the process proceeds to step S504. In step S504, the power saving mode is set to drive mode. In step S505, it is determined whether the imaging device main body 200 connected to the lens assembly 100 is imaging device main body A. If it is determined that the imaging device main body 200 is imaging device main body A ("Yes" in step S505), the process proceeds to step S506. On the other hand, if it is determined that the imaging device main body 200 is not imaging device main body A ("No" in step S505), the process proceeds to step S507. In step S506, all drive modes are set to drive modes. Then, the process ends. In step S507, some drive modes are set to drive modes. In step S508, the drive of the focusing lens unit 105 is disabled. Then, the process ends. In the above manner, the power control unit 142 sets the drive modes.

[0071] The processing performed by the control unit 111 in partial drive mode will now be described. In partial drive mode, the drive of the focusing lens unit 105 is disabled. Therefore, for example, even when a drive command is received from the focusing controller 10, the control unit 111 ignores the drive command and does not generate a drive command for driving the control unit 141. When a drive command is received for an optical component other than the focusing lens unit 105, the control unit 111 generates a drive command for the drive unit corresponding to that optical component. In this manner, a portion of the optical component is driven in partial drive mode.

[0072] The following describes the processing performed by the control unit 111 in power-saving mode. Figure 7This is a flowchart illustrating an example of zoom drive processing in power-saving mode. In this example, the drive of zoom lens unit 102 is given a higher priority than the drive of focusing lens unit 105. By executing control so that zoom lens unit 102 and focusing lens unit 105 are driven in parallel, power consumption is controlled to not exceed a predetermined power supply. When a drive command for zoom lens unit 102 is input to control unit 111, Figure 7 The process begins. In step S701, the control unit 111 determines whether the focusing lens unit 105 is currently being driven. If the focusing lens unit 105 is currently being driven ("Yes" in step S701), the process proceeds to step S702. On the other hand, if the focusing lens unit 105 is not currently being driven ("No" in step S701), the process proceeds to step S703. In step S702, the control unit 111 stops driving the focusing lens unit 105. Then, the process returns to step S701. In step S703, the control unit 111 outputs a drive command for the zoom lens unit 102 to the drive unit 108. Then, the process ends.

[0073] Figure 8 This is a flowchart illustrating an example of the focus drive process in power-saving mode. When a drive command for the focusing lens unit 105 is input to the control unit 111, Figure 8 The process begins. In step S801, the control unit 111 determines whether the zoom lens unit 102 is currently being driven. If the zoom lens unit 102 is currently being driven ("Yes" in step S801), the control unit 111 discards the drive command for the focusing lens unit 105. Then, the process ends. As a result, the focusing lens unit 105 is not driven. On the other hand, if the zoom lens unit 102 is not currently being driven ("No" in step S801), the process proceeds to step S802. In step S802, the control unit 111 outputs the drive command for the focusing lens unit 105 to the drive unit 109. Then, the process ends. By prioritizing the drive of the zoom lens unit 102 while exclusively executing the drive of both the zoom lens unit 102 and the focusing lens unit 105 in this way, the control unit 111 can prevent power consumption from exceeding a predetermined power supply.

[0074] Figure 9A and 9B Examples of driving optical components for each type of imaging device body 200 are illustrated. Figure 9A The illustration shows the driving of an optical component in a lens assembly 100 in response to a driving command from a communication unit 210. Figure 9AThe illustration shows an example of the driving of each optical component when the lens assembly 100, conforming to drive command B, is connected to the imaging device bodies A, B, and C. The symbol "○" indicates that driving is permissible, "×" indicates that driving is not permissible, and "△" indicates that driving is permissible in power-saving mode. In this case, it is assumed that the external power supply 30 is not connected to the lens assembly 100. In the case of imaging device body A, the lens assembly 100 is supplied with sufficient power so that it operates in all drive modes. Figure 9A In the diagram, "aperture" refers to aperture stop unit 114, "zoom" refers to zoom lens unit 102, "focus" refers to focusing lens unit 105, "IsShift" refers to image stabilizing lens unit 103, and "IsMloc" refers to locking mechanism 104. The imaging device body A does not receive any drive commands for image stabilizing lens unit 103 and locking mechanism 104 from the imaging device body 200.

[0075] With the imaging device body B in operation, the lens assembly 100 is not powered by the external power supply 30, causing the lens assembly 100 to operate in a partial drive mode. No optical component responds to the drive commands from the imaging device body B, and therefore no optical component is driven by the drive commands from the communication unit 210.

[0076] With the imaging device body C in operation, the lens assembly 100 is not powered by the external power supply 30 and operates in power-saving mode. The aperture unit 114 is therefore driven based on drive commands from the communication unit 210. The image stabilizing lens unit 103 and the locking mechanism 104 do not receive drive commands from the imaging device body C. Since the imaging device body C does not supply sufficient power to drive the zoom lens unit 102 and the focusing lens unit 105 in parallel, the lens assembly 100 performs exclusive drive (in power-saving mode) while giving priority to the zoom lens unit 102. The operation of the image stabilizing lens unit 103 and the locking mechanism 104 will be described in detail below.

[0077] Figure 9B The illustration shows the actuation of optical components in a lens assembly 100 in response to drive commands from sources other than the communication unit 210. Drive commands from sources other than the communication unit 210 include drive commands generated for the zoom lens unit 102 based on the operation of the zoom switch 133 or the zoom controller 20. Drive commands also include drive commands generated for the focusing lens unit 105 based on the operation of the focus controller 10, drive commands generated for the image stabilizing lens unit 103 and the locking mechanism 104 based on the operation of the image stabilizing switch 132, and drive commands for the aperture unit 114 based on the operation ring 130 when the operation ring 130 is set to operate the aperture unit 114.

[0078] Since the imaging device body A supplies sufficient power to the lens assembly 100, the lens assembly 100 operates in full drive mode. Since the imaging device body B does not supply sufficient power to drive all optical components in parallel, the lens assembly 100 operates in a partial drive mode that disables the drive of the focusing lens unit 105. In the case of the imaging device body C, the lens assembly 100 drives the aperture stop unit 114. Since the imaging device body C does not supply sufficient power to drive the zoom lens unit 102 and the focusing lens unit 105 in parallel, the lens assembly 100 performs exclusive drive (in power-saving mode) while giving priority to the zoom lens unit 102. The lens assembly 100 drives the image stabilizing lens unit 103 based on the operation of the image stabilizing switch 132 (i.e., the drive of the image stabilizing lens unit 103 is switched on or off). The lens assembly 100 drives the locking mechanism 104 when the power supply is switched on or off.

[0079] Performing this operation reduces the number of times the locking mechanism 104 is activated, thereby reducing power consumption. The locking mechanism 104 will be described in detail below.

[0080] <Control Image Stabilizing Lens Unit and Locking Mechanism>

[0081] Figure 10A and 10B An example of the state transition of the image stabilizing lens unit 103 and the locking mechanism 104 is illustrated.

[0082] Figure 10AThe diagram illustrates the operation of the image stabilizing lens unit 103 and the locking mechanism 104 in all drive modes. The top row of the table, from left to right, represents the states of the imaging device: the imaging device body 200 with power on, the imaging device body 200 with image stabilization switch 132 on, the imaging device body 200 with image stabilization switch 132 off, and the imaging device body 200 with power off. The middle row of the table represents the state of the image stabilizing lens unit 103. The bottom row of the table represents the state of the locking mechanism 104. The image stabilizing lens unit 103 enters an image stabilizing state when image stabilization switch 132 is on (“image stabilization on”), and enters a non-image stabilizing state (i.e., the image stabilizing lens unit 103 remains in its initial position) when image stabilization switch 132 is off (“image stabilization off”). When the imaging device body 200 is powered on, the locking mechanism 104 follows the state of image stabilization switch 132. The locking mechanism 104 enters an unlocked state when the image stabilization switch 132 is turned on, and enters a locked state when the image stabilization switch 132 is turned off. When the power to the imaging device main body 200 is turned off, the locking mechanism 104 enters a locked state. The locking mechanism 104 switches between the locked and unlocked states via the operation of the drive unit (actuator). In partial drive mode, the operation of the image stabilization lens unit 103 and the locking mechanism 104 is similar to the operation described in full drive mode.

[0083] Figure 10B The diagram illustrates the operation of the image stabilizing lens unit 103 and the locking mechanism 104 in power-saving mode. The image stabilizing lens unit 103 operates in a similar manner to that in full-drive mode. When the power supply to the imaging device main body 200 is turned on, the locking mechanism 104 enters an unlocked state, regardless of the state of the image stabilization switch 132. When the power supply to the imaging device main body 200 is turned off, the locking mechanism 104 enters a locked state. This control enables a reduction in the number of locking operations, thereby reducing power consumption or increasing the power allocated to drive other optical components.

[0084] Using the above configuration, this exemplary embodiment enables the provision of a lens assembly, imaging device body, imaging device, and program that are beneficial in achieving compatibility with conventional devices (models) and extended functionality of the imaging device. In power-saving mode, instead of exclusive drive control of multiple optical components or as an addition to exclusive drive control of multiple optical components, the drive speed of the optical components can be reduced. In the above example, information sent from the lens assembly 100 to the imaging device body 200 is updated based on the configuration of the imaging device. However, information sent from the imaging device body 200 to the lens assembly 100 can also be updated based on the configuration.

[0085] The second exemplary embodiment will now be described with a focus on an example of setting drive limits for optical components based on the power consumption of the drive unit. Figure 11 An example of the configuration of the control unit 111 in the lens assembly 100 and the control unit 207 in the imaging device body 200 according to a second exemplary embodiment is illustrated. (See reference...) Figure 11 The control unit 111 also 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 the current information to the power control unit 142. Figure 12 This is a flowchart illustrating an example of power control processing. The current threshold (described below) is a current-related threshold set based on the power supplied from the power supply unit 208. The current threshold can be stored in the control unit 111. Reference Figure 12 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 step S901 is less than a current threshold. If it is determined that the current is less than the current threshold (yes in step S902), the process ends. On the other hand, if it is determined that the current is not less than the current threshold (i.e., equal to or greater than the current threshold) (no in step S902), the process proceeds to step S903. In step S903, the driving of the focusing lens unit 105 is disabled. Then, the process ends. This process is repeated.

[0086] If the drive current exceeds a current threshold, the above configuration disables the drive of the focusing lens unit 105, thereby preventing power consumption from exceeding a predetermined power limit. The optical component to be disabled is not limited to the focusing lens unit 105, but can be another optical component. Instead of disabling the drive of the optical component, or as an addition to disabling the drive of the optical component, the drive speed of the optical component can be reduced. Instead of drive current detection, or as an addition to drive current detection, another physical quantity related to power consumption can be detected.

[0087] The third exemplary embodiment will now be described with a focus on an example of an imaging device configuration that includes an (intermediate) adapter device for the lens device attached between the interchangeable lens device and the imaging device body. Figure 13An example configuration of an imaging apparatus according to a third exemplary embodiment is illustrated. The adapter device 500 may include optical components deployed in the optical path between the interchangeable lens device 100 and the imaging apparatus body 200. For example, the adapter device 500 may be an extension tube for changing the back focal distance 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 in the adapter device 500. The AF / MF switch 504 is used to switch between AF and MF states. In the AF state, the focusing lens unit 105 is driven based on a drive command from the imaging apparatus body 200. In the MF state, the focusing lens unit 105 operates via an operating ring 130 provided on the lens device 100 and a (remote) focus controller 10 (e.g., focus demand). The state of the communication switch 505 is detected by the control unit 501, and the state information is transmitted to the imaging apparatus body 200 via the communication unit 502. The imaging device body 200 determines whether the focusing lens unit 105 can be driven from the imaging device body 200 based on status information. The status information is also transmitted to the lens device 100 via communication unit 502 or 210. According to a third exemplary embodiment, the adapter device 500 is provided with an AF / MF switch 504, which has a function similar to that of the AF / MF switch 135 according to the first exemplary embodiment. The AF / MF switch 504 can be provided on both the lens device 100 and the imaging device body 200.

[0088] Information indicating that the communication switch 505 is provided to the adapter device 500 is transmitted from the communication unit 502 to the communication unit 210. Information regarding the state of the communication switch 505 is also transmitted from the communication unit 502 to the communication unit 210. The imaging device body 200 can thus detect that the lens device 100 and the adapter device 500 are provided with AF / MF switches. When both the lens device 100 and the intermediate adapter device 500 are provided with AF / MF switches, the operation of the AF / MF switch provided on the lens device 100 is given priority. When the imaging device is started, communication between the communication units 140 and 210 can be performed by short-circuiting (closing) the communication line between the communication units 140 and 502 using the communication switch 505. To perform communication between the communication units 502 and 210, the communication switch 505 can be turned on.

[0089] <Power Supply and Communications>

[0090] Lens assembly 100 and adapter assembly 500 are mechanically and electrically connected to each other via support unit 300. Adapter assembly 500 and imaging device body 200 are mechanically and electrically connected via support unit 400. Adapter assembly 500 is powered from power supply unit 208 via power terminals provided on support unit 400. Lens assembly 100, imaging device body 200, and adapter assembly 500 communicate with each other via communication terminals provided on support units 300 and 400. Control unit 501 receives commands and information sent from communication unit 210 via communication unit 502. Control unit 501 can also receive information transmitted between communication units 140 and 210. Control unit 501 controls each unit in adapter assembly 500 based on the received commands.

[0091] Figure 14 An example configuration of the control unit 111 in the lens assembly 100, the control unit 501 in the adapter assembly 500, and the control unit 207 in the imaging device body 200 is illustrated. The control unit 111 includes a communication unit 140 and a drive control unit 141. The control unit 501 includes a communication unit 502. The communication unit 502 stores information transmitted between the communication units 140 and 210 during initial communication. If the adapter assembly 500 needs to change the information transmitted from the communication unit 140, the communication unit 502 changes the information and then sends the changed information to the communication unit 210. The processing of information changes by the communication unit 502 will be described below. The configuration of the control unit 207 is similar to that according to the first exemplary embodiment.

[0092] Figure 15A , 15B Figures 15C illustrate an example of information to be sent during initial communication. According to this exemplary embodiment, since the lens assembly 100 is not provided with an AF / MF switch, therefore... Figure 15C Information A4 in the document indicates "No" for all types of imaging device bodies in both initial and subsequent communications.

[0093] Figure 16 This is a flowchart illustrating an example of the initial communication process. When communication unit 140 performs the initial communication again to change lens device information A and B as in the first exemplary embodiment, communication unit 140 subsequently does not perform the initial communication again to further change lens device information A and B. Figure 16 The process in the flowchart shown begins when the communication line is short-circuited by communication switch 505 and communication is performed between communication units 140 and 210. (See reference) Figure 16In step S1001, it is determined whether communication unit 502 has received information from communication unit 140 indicating that lens device information A has been changed. If such information has been received (yes in step S1001), the process proceeds to step S1002. In step S1002, it is determined whether a command requesting information A has been received from communication unit 210. If such a command has been received (yes in step S1002), the process proceeds to step S1003. In step S1003, imaging device main body information A sent from communication unit 210 and lens device information A sent from communication unit 140 are acquired. Then, the process proceeds to step S1004.

[0094] In step S1004, it is determined whether a command request information B from communication unit 210 has been received. If the command is received (yes in step S1004), the process proceeds to step S1005. In step S1005, imaging device main body information B sent from communication unit 210 and lens device information B sent from communication unit 140 are acquired. Then, the process proceeds to step S1006. In step S1006, it is determined whether communication unit 210 complies with the drive command for focusing lens unit 105 based on the acquired imaging device main body information. If communication unit 210 complies with the drive command (yes in step S1006), the process proceeds to step S1007. On the other hand, if communication unit 210 does not comply with the drive command (no in step S1006), the process ends. The determination of whether communication unit 210 complies with the drive command is based on whether either imaging device main body information A2 or B1 indicates "compliance".

[0095] In step S1007, the control unit 501 determines whether the focusing lens unit 105 can be driven based on the acquired lens device information. If the focusing lens unit 105 can be driven ("Yes" in step S1007), the process proceeds to step S1008. On the other hand, if the focusing lens unit 105 cannot be driven ("No" in step S1007), the process ends here. The determination of whether the focusing lens unit 105 can be driven is based on the lens device information A3. In step S1008, it is determined whether AF / MF switch status information can be sent. If this information can be sent ("Yes" in step S1008), the process proceeds to step S1009. On the other hand, if this information cannot be sent ("No" in step S1008), the process ends here. Here, the determination of whether AF / MF switch status information can be sent is based on whether the drive command from communication unit 210 to focusing lens unit 105 is met and whether the lens assembly 100 is provided with AF / MF switch 135. Therefore, if the drive command from communication unit 210 to focusing lens unit 105 can but cannot send AF / MF switch status information, the lens assembly 100 is not provided with AF / MF switch 135. In step S1009, control unit 501 determines that lens assembly information A4 indicates "Yes". Then, the process proceeds to step S1010. In step S1010, communication switch 505 is turned on. Then, the process proceeds to step S1011. When communication switch 505 is turned on, communication units 502 and 210 are ready to communicate with each other, but communication units 140 and 210 cannot communicate with each other.

[0096] In step S1011, it is determined whether a command to confirm whether lens device information A needs to be changed is received from communication unit 210. If the command is received (yes in step S1011), the process proceeds to step S1012. On the other hand, if the command is not received (no in step S1011), the process returns to step S1011. Communication unit 210 sends the command periodically or repeatedly. In step S1012, information indicating that lens device information A needs to be changed is sent to communication unit 210. Then, the process proceeds to step S1013. In step S1013, it is determined whether a command requesting lens device information A is received from communication unit 210. If the command is received (yes in step S1013), the process proceeds to step S1014. In step S1014, imaging device main body information A is acquired from communication unit 210, and lens device information A is sent to communication unit 210. Then, the process proceeds to step S1015. In step S1015, it is determined whether a command requesting lens device information B has been received from communication unit 210. If the command has been received (yes in step S1015), the process proceeds to step S1016. In step S1016, imaging device main body information B is acquired from communication unit 210, and lens device information B is sent to communication unit 210. Then, the process proceeds to step S1017. In step S1017, communication switch 505 is closed. Then, the process ends. When communication switch 505 is closed, communication units 140 and 210 are ready to communicate with each other.

[0097] As described above, after initial communication between communication units 502 and 210, lens device information that changes when the adapter device 500 is attached can be transmitted between communication units 502 and 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 situation. The replaceable lens device information can be changed through the adapter device 500. Furthermore, the adapter device 500 can be provided with other switches and operating components, and can be provided with optical components and a drive unit for the optical components.

[0098] The adapter device 500 can control the communication switch 505 as needed to perform communication between the communication units 502 and 210. In this case, the state of the communication switch 505 is sent from the communication unit 502 to the communication unit 210.

[0099] The above-described configurations and exemplary embodiments of this disclosure can provide lens devices, imaging device bodies, imaging devices, and programs that are beneficial in achieving compatibility with conventional devices (models) and extended functionality of the imaging device. In the above example, information sent from lens device 100 to imaging device body 200 is updated based on the configuration of the imaging device. However, information sent from imaging device body 200 to lens device 100 can also be updated based on the configuration. This disclosure is not limited to the configuration of adapter device 500 having extended functionality and updating lens device information. Replaceable lens device 100 can have extended functionality, and adapter device 500 can update lens device information. For example, when lens device 100 is not configured to operate in power-saving mode, adapter device 500 can have the functionality of power control unit 142 and execute drive restrictions in response to drive commands from communication unit 210. In this way, adapter device 500 can replace or be added to lens device 100 to perform functional extensions in the imaging device.

[0100] The communication method of communication unit 140 may differ from that of communication unit 210, and adapter device 500 may perform conversion between the two communication methods. In this case, for example, communication unit 502 may communicate with communication unit 140 based on a first communication method and with communication unit 210 based on a second communication method.

[0101] A fourth exemplary embodiment is described. At least one function of the above exemplary embodiments can also be implemented by a program for implementing that at least one function. The program can be supplied to the device or system via a network or storage medium, and then read and executed by at least one processor in the computer of the device or system. The function can also be implemented by circuitry (e.g., an application-specific integrated circuit (ASIC)) for implementing that function.

[0102] Other embodiments

[0103] Embodiments of this disclosure can also be implemented by a computer that reads and executes computer-executable instructions (e.g., one or more programs) recorded on a storage medium (which may also be more fully referred to as a 'non-transitory computer-readable storage medium') to perform one or more functions of the above embodiments and / or includes one or more circuits (e.g., application-specific integrated circuits (ASICs)) for performing one or more functions of the above embodiments, and by a method performed by a computer of the system or device by, for example, reading and executing computer-executable instructions from the storage medium to perform one or more functions of the above embodiments and / or controlling one or more circuits to perform one or more functions of the above embodiments. The computer may include one or more processors (e.g., a central processing unit (CPU), a microprocessor unit (MPU)) and may include separate computers or networks of separate processors to read and execute computer-executable instructions. The computer-executable instructions may be provided to the computer, for example, from a network or storage medium. The storage medium may include, for example, a hard disk, random access memory (RAM), read-only memory (ROM), storage devices for distributed computing systems, optical discs (such as CDs, DVDs, or Blu-ray discs). TM One or more of the following: flash memory devices, memory cards, etc.

[0104] The embodiments of the present invention can also be implemented by providing software (programs) that perform the functions of the above embodiments to a system or device via a network or various storage media, and the computer or central processing unit (CPU) or microprocessor unit (MPU) of the system or device reads out and executes the program.

[0105] While this disclosure has been described with reference to exemplary embodiments, it is to be understood that this disclosure is not limited to the disclosed exemplary embodiments. The scope of the appended claims is to be given the broadest interpretation in order to cover all such modifications and equivalent structures and functions.

Claims

1. A lens device detachably attached to an image pickup device main body, the lens device comprising: an optical member; and a controller configured to perform communication with the image pickup device main body with respect to driving of the optical member, wherein the controller is configured to receive first information transmitted from the image pickup device main body for identifying the image pickup device main body, and transmit second information for identifying the lens device to the image pickup device main body; wherein the controller is configured to request the image pickup device main body to transmit third information for identifying the image pickup device main body based on the first information, and wherein the controller is configured to transmit fourth information for identifying the lens device to the image pickup device main body in response to the third information transmitted from the image pickup device main body.

2. The lens device according to claim 1, further comprising: a driving unit configured to drive the optical member.

3. The lens device according to claim 1, wherein the fourth information is generated by changing at least a part of the second information.

4. The lens device according to claim 1, wherein the second information includes information indicating whether or not the optical member is drivable by the image pickup device main body.

5. The lens device according to claim 3, wherein the second information includes information indicating that the optical member is not drivable by the image pickup device main body, and the fourth information includes information indicating that the optical member is drivable by the image pickup device main body.

6. The lens device according to claim 4, wherein the information indicating whether or not the optical member is drivable by the image pickup device main body includes information on a restriction of driving of the optical member.

7. The lens device according to claim 1, wherein the controller is configured to control a driving unit to perform a restriction of driving of the optical member, the driving unit being configured to drive the optical member based on the third information.

8. The lens device according to claim 3, further comprising: a plurality of optical members; and a plurality of driving units respectively configured to drive the plurality of optical members, wherein the fourth information includes information on whether or not the controller can exclusively control the plurality of driving units.

9. The lens device according to claim 3, wherein the fourth information includes information on whether or not the controller can restrict a driving speed of the optical member.

10. The lens device according to claim 1, further comprising: a movable optical member configured to reduce image blur; and a restriction mechanism configured to perform a restriction of driving of the movable optical member, wherein the controller is configured to control the restriction mechanism to restrict driving of the movable optical member based on the third information.

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

12. The lens apparatus according to claim 1, wherein the lens apparatus is detachably attached between a replaceable lens apparatus and the image pickup apparatus main body, the replaceable lens apparatus is detachably attached to the image pickup apparatus main body, and wherein the controller is configured to perform communication with the replaceable lens apparatus and the image pickup apparatus main body with respect to driving of the optical member.

13. The lens apparatus according to claim 12, further comprising an optical member disposed on an optical path between the replaceable lens apparatus and the image pickup apparatus main body.

14. An image pickup system comprising: the lens apparatus according to claim 1; and an image pickup apparatus main body, wherein the image pickup apparatus main body includes an image pickup element configured to pick up an image formed via the lens apparatus.

15. An image pickup apparatus main body to which a lens apparatus is detachably attached, the image pickup apparatus main body comprising: a controller configured to perform communication with the lens apparatus with respect to driving of an optical member included in the lens apparatus; and, an image pickup element configured to pick up an image formed via the lens apparatus, wherein the controller is configured to transmit first information for identifying the image pickup apparatus main body to the lens apparatus and receive second information for identifying the lens apparatus from the lens apparatus, and wherein the controller is configured to transmit third information for identifying the image pickup apparatus main body to the lens apparatus in response to a request from the lens apparatus based on the first information.

16. An image pickup system comprising: the image pickup apparatus main body according to claim 15; and a lens apparatus detachably attached to the image pickup apparatus main body.

17. A non-transitory storage medium storing a program for causing a computer to execute a method of communication with an image pickup apparatus main body, the method being performed by a lens apparatus with respect to driving of an optical member included in the lens apparatus, the lens apparatus being detachably attached to the image pickup apparatus main body, the method comprising: receiving first information for identifying the image pickup apparatus main body transmitted from the image pickup apparatus main body, and transmitting second information for identifying the lens apparatus to the image pickup apparatus main body; requesting the image pickup apparatus main body to transmit third information for identifying the image pickup apparatus main body based on the first information; and transmitting fourth information for identifying the lens apparatus to the image pickup apparatus main body in response to the third information transmitted from the image pickup apparatus main body.

18. A non-transitory storage medium storing a program for causing a computer to execute a method of communication with a lens device, the method being performed by an image pickup device body with respect to driving of an optical member included in the lens device, the lens device being detachably attached to the image pickup device body, the method comprising: sending first information for identifying the image pickup device body to the lens device and receiving second information for identifying the lens device from the lens device, and sending third information for identifying the image pickup device body to the lens device in response to a request from the lens device based on the first information.

Images