Lens device, imaging device, control device, control method for the lens device and imaging device, and program

Abstract

The present invention provides a lens device capable of reducing the fluctuation in the angle of view caused by the movement of the focus lens. [Solution] A lens device (100) that is detachable from an imaging device (200) comprises a focus lens (104) that is movable for focus adjustment, a zoom lens (102) that changes the angle of view by movement, and a control unit (105) that performs a first correction by moving the zoom lens to reduce the change in the angle of view caused by the movement of the focus lens. The control unit is able to communicate with an imaging device which has a processing unit (202) that performs a second correction by processing the captured image to reduce the change in the angle of view, and determines to perform at least one of the first or second corrections.

Description

Technical Field

[0001] The present invention relates to a lens device, an imaging device, a control device, a control method for a lens device and an imaging device, and a program.

Background Art

[0002] Patent Document 1 discloses a method of moving a zoom lens as a method for reducing a change in the angle of view (focus breathing) generated by the movement of a focus lens. Patent Document 2 discloses a method of electronically correcting a captured image as a method for reducing a change in the angle of view generated by the movement of a focus lens.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configurations disclosed in Patent Document 1 and Patent Document 2, when both the method of moving the zoom lens and the method of electronically correcting the captured image can be executed, if both methods are not appropriately executed, it may be impossible to appropriately correct the change in the angle of view.

Means for Solving the Problems

[0005] One aspect of the present invention is a lens device that is detachable from an imaging device, comprising: a focus lens that is movable for focus adjustment; a zoom lens that changes the angle of view by movement; and a control unit that performs a first correction by moving the zoom lens to reduce the change in the angle of view caused by the movement of the focus lens, wherein the control unit is able to communicate with an imaging device which has a processing unit that performs a second correction by processing the captured image to reduce the change in the angle of view, and the control unit determines the execution of at least one of the first correction or the second correction.

[0006] Other objects and features of the present invention are described in the following examples. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a lens device that can reduce the fluctuation of the angle of view caused by the movement of the focus lens. [Brief explanation of the drawing]

[0008] [Figure 1] This is a diagram showing the configuration of the imaging system in each embodiment. [Figure 2] This is a flowchart showing the correction process in Example 1. [Figure 3] This is a flowchart showing the correction process in Example 2. [Figure 4] This is a flowchart showing the correction process in Example 3. [Figure 5] This is a flowchart showing the correction process in Example 4. [Figure 6] This figure shows the change in the correction ratio in Example 4. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [Examples]

[0010] First, with reference to Figure 1, the imaging system (interchangeable lens camera system) 10 in Embodiment 1 of the present invention will be described. Figure 1 is a configuration diagram of the imaging system 10. The imaging system 10 is composed of a lens device (interchangeable lens) 100 and a camera body (imaging device) 200 to which the lens device 100 is detachably (attached and detached), and is capable of taking still images and videos. The basic configuration of the imaging system 10 in this embodiment is also common to Embodiments 2 to 4 described later. However, each embodiment is not limited thereto and can also be applied to imaging devices in which the lens device and the camera body are integrally configured. In this case, a communication unit for communication between the lens device and the camera body is not required.

[0011] The lens device 100 includes an imaging optical system 101 capable of forming an image of a subject on the image sensor 201 of the camera body 200, and a lens control unit (control device) 105 capable of communicating with the camera control unit 207 of the camera body 200.

[0012] The imaging optical system 101 includes a zoom lens (variable magnification lens) 102, an aperture (high aperture) 103, and a focus lens 104. The zoom lens 102 is electrically zoomable (variable magnification) (the angle of view is changed by movement). The zoom lens 102 is also movable along the optical axis OA in response to operation by the user of a zoom operation ring (not shown). The focal length of the imaging optical system 101 is changed (variable magnification) by the movement of the zoom lens 102. The zoom lens 102 may include a lens (optical element) that functions to change the angle of view when the lens device is a fixed focal length lens. The focus lens 104 moves during focusing (for focus adjustment). The focus lens 104 is also movable in response to operation by the user of a focus operation ring (not shown). The zoom lens 102 and the focus lens 104 are not limited to a single lens, but may be lens groups consisting of multiple lenses.

[0013] The lens control unit 105 is a computer with a CPU (Central Processing Unit). The lens control unit 105 is electrically connected to the memory 106, zoom position detection unit 107, zoom drive unit 108, aperture drive unit 111, focus position detection unit 112, and focus drive unit 113. The lens control unit 105 drives the zoom lens 102 to perform focus breathing correction (correction of changes in the angle of view due to the movement of the focus lens 104) (performing the first correction). The lens control unit 105 also communicates with the camera control unit 207 to receive drive information including the target focus position from the camera control unit 207 and drives the focus lens 104 based on that drive information.

[0014] Memory 106 is a storage unit such as ROM (Read Only Memory) or RAM (Random Access Memory). Memory 106 stores data necessary to correct the change in angle of view caused by the movement of the focus lens 104 by moving the zoom lens 102. The necessary data includes, for example, the amount of change in the angle of view due to focus breathing and the amount of movement of the zoom lens 102 required for correction. Memory 106 also stores the setting of whether focus breathing correction by the lens control unit 105 is enabled or disabled.

[0015] The zoom position detection unit 107 detects the zoom position (position of the zoom lens 102) using a zoom position sensor such as a variable resistor and outputs the zoom position data to the lens control unit 105. The zoom position data may be the position of the zoom lens 102, or the operating position of the zoom operation ring. It may also be the focal length corresponding to these positions. The zoom drive unit 108 has a stepping motor, ultrasonic motor, or voice coil motor, etc., and drives the zoom lens 102.

[0016] The zoom clutch 109 is a clutch for switching whether to connect the zoom drive unit 108 and the zoom operation ring. That is, the zoom clutch 109 can switch between the electric operation state and the manual operation state of the zoom lens 102 (change the setting state of electric operation or manual operation). In the case of the electric operation state, the zoom lens 102 can be zoomed electrically. The zoom clutch 109 is connected to the lens control unit 105, and the lens control unit 105 can detect the state of the zoom clutch 109. The zoom clutch switch 110 can switch the zoom clutch 109. In this embodiment, a configuration may be adopted in which the zoom clutch 109 and the zoom clutch switch 110 are not provided and the zoom lens 102 can always be driven electrically.

[0017] The aperture drive unit 111 includes an aperture actuator such as a stepping motor or a voice coil motor for driving the aperture 103, and an aperture sensor such as a hall element for detecting the drive position of the aperture 103.

[0018] The focus position detection unit 112 detects the position of the focus lens 104 in the optical axis direction by a focus position sensor such as an encoder, and outputs focus position data to the lens control unit 105. Based on the focus position output to the lens control unit 105, the lens control unit 105 performs focus breathing correction. The focus position data may be the position of the focus lens 104, or may be the operation position of the focus operation ring. Or it may be the focus position (focal position) corresponding to these positions. The focus drive unit 113 includes a focus actuator such as a stepping motor, an ultrasonic motor, or a voice coil motor, and drives the focus lens 104.

[0019] The lens control unit 105 receives an aperture drive command from the camera control unit 207 and controls the aperture actuator of the aperture drive unit 111. The lens control unit 105 also receives a zoom drive command and a focus drive command from the camera control unit 207 and controls the zoom actuator of the zoom drive unit 108 and the focus actuator of the focus drive unit 113.

[0020] The lens control unit (control unit, control device) 105 includes a first instruction unit 105a, a second instruction unit 105b, and a determination unit 105c. The first instruction unit 105a instructs the movement of the zoom lens 102 so as to reduce the variation in the angle of view due to the movement of the focus lens 104. The second instruction unit 105b instructs the correction of the captured image so as to reduce the variation in the angle of view due to the movement of the focus lens 104. The determination unit 105c determines at least one operation of the first instruction unit 105a and the second instruction unit 105b.

[0021] That is, the lens control unit 105 executes the first correction (first focus breathing correction) by moving the zoom lens 102 so as to reduce the variation in the angle of view due to the movement of the focus lens 104. The lens control unit 105 is also communicable with the camera body 200 having a signal processing unit 202 described later, and executes the second correction by processing the captured image so as to reduce the variation in the angle of view due to the movement of the focus lens 104. The lens control unit 105 determines the execution of at least one of the first correction and the second correction.

[0022] Note that this embodiment is not limited thereto, and instead of the lens control unit 105, the camera control unit (control unit, control device) 207 described later may execute at least a part of the functions of the first instruction unit 105a, the second instruction unit 105b, and the determination unit 105c.

[0023] The camera body 200 includes an image pickup device 201, a signal processing unit (processing unit) 202, a recording processing unit 203, an electronic viewfinder 204, a display unit 205, a defocus detection unit 206, a camera control unit 207, and a memory 208.

[0024] The image sensor 201 converts light from the imaging optical system 101 into an electrical signal by photoelectric conversion and outputs it to the signal processing unit 202. The image sensor 201 is, for example, a CMOS sensor. In addition to pixels for imaging, the image sensor 201 has pixels for detecting the focus position.

[0025] The signal processing unit 202 performs various processes such as amplification, noise reduction, and color correction of the input electrical signal and outputs it to the recording processing unit 203. The signal processing unit 202 corrects focus breathing caused by the movement of the focus lens 104 by electronically processing the image (performing a second correction). The correction of focus breathing by the signal processing unit 202 may be performed by electronically cropping the image, or by changing the area of ​​the image sensor 201 used in accordance with the change in the angle of view.

[0026] The recording processing unit 203 records the input image. The recorded image is displayed in the electronic viewfinder 204 and the display unit 205. The display unit 205 displays the settings status of the camera body 200, and the settings of the camera body 200 can be changed by user input.

[0027] The defocus detection unit 206 detects the focus state of the subject image using the image sensor 201. The defocus detection unit 206 detects the phase difference between a pair of subject image signals obtained from light incident on the pixels of the image sensor 201 used for detecting the focus position, via a microlens that performs pupil division, and determines the amount of defocus corresponding to the detected phase difference. The amount of defocus is output to the camera control unit 207.

[0028] The camera control unit 207 is a computer with a CPU and is electrically connected to the recording processing unit 203, the defocus detection unit 206, and the memory 208. The camera control unit 207 reads and executes programs recorded in the memory 208 and communicates information necessary for autofocus control with the lens control unit 105. The camera control unit 207 also generates a focus drive command using the amount of defocus obtained from the defocus detection unit 206 and the position information of the focus lens 104 obtained from the lens device 100.

[0029] Memory 208 stores the data necessary for the signal processing unit 202 to electronically correct focus breathing. Memory 208 also stores the setting for whether focus breathing correction by the signal processing unit 202 is enabled or disabled.

[0030] In this embodiment, autofocus control (AF control) is performed using a phase-difference detection method, but it is not limited to this, and AF control may also be performed using a contrast-detection method.

[0031] The lens control unit 105 and the camera control unit 207 communicate as necessary for control. The camera control unit 207 transmits focus drive commands, aperture drive commands, and signals notifying the time of imaging to the lens control unit 105. The information transmitted and received in the communication between the lens control unit 105 and the camera control unit 207 includes information for determining the method for correcting focus breathing.

[0032] The user can enable or disable focus breathing correction by the lens control unit 105 using an input / output device, including a switch or display (not shown), on the lens device 100. The user can also enable or disable focus breathing correction by the signal processing unit 202 using an input / output device, including a switch (not shown), on the camera body 200 or by inputting to the screen displayed on the display unit 205.

[0033] Next, with reference to Figure 2, the focus breathing correction process (control method of the imaging system 10) in this embodiment will be described. Figure 2 is a flowchart of the focus breathing correction process in this embodiment. In this embodiment, the process for determining whether to perform focus breathing correction using the lens control unit 105 or the signal processing unit 202 will be described. Each step in Figure 2 is mainly executed by instructions from the lens control unit 105 or the camera control unit 207.

[0034] In the following steps, the processing performed by the lens control unit 105 may be changed to processing performed by the camera control unit 207. Similarly, the processing performed by the camera control unit 207 may be changed to processing performed by the lens control unit 105. Furthermore, the lens control unit 105 and the camera control unit 207 may perform processing in cooperation with each other. This also applies to the explanation of each step in Figures 3 to 5 described later in Examples 2 to 4.

[0035] First, in step S201, the lens control unit 105 uses the signal from the focus position detection unit 112 to determine whether or not there has been an operation (focus operation) of the focus lens 104. The operation of the focus lens 104 may be focus drive by AF communicated from the camera control unit 207 to the lens control unit 105, or it may be focus drive by the user operating the focus operation ring. If it is determined that there has been no focus operation, the process proceeds to step S202. On the other hand, if it is determined that there has been a focus operation, the process proceeds to step S203.

[0036] In step S202, the lens control unit 105 determines whether the focus breathing correction setting information (information regarding the setting state) by the lens control unit 105 or the signal processing unit 202 has been changed. If it is determined that the setting information has not been changed, the process proceeds to step S209. On the other hand, if it is determined that the setting information has been changed, the process proceeds to step S203.

[0037] In step S203, the lens control unit 105 transmits the position (focus position) of the focus lens 104 to the camera control unit 207 via communication. This allows the camera control unit 207 to recognize that focus breathing correction is necessary due to a change in the position of the focus lens 104.

[0038] Next, in step S204, the camera control unit 207 transmits setting information to the lens control unit 105 regarding whether the focus breathing correction by the signal processing unit 202 is enabled or disabled. The setting information transmitted here is information regarding the execution status of the focus breathing correction by the signal processing unit 202, or information regarding the permission or prohibition flag for the execution of the focus breathing correction by the lens control unit 105. However, this embodiment is not limited to this, and other information may be used as long as it allows the lens control unit 105 to determine whether or not to perform focus breathing correction.

[0039] Next, in step S205, the lens control unit 105 determines whether or not focus breathing correction by the signal processing unit 202 is enabled based on the setting information received in step S204. If it is determined that focus breathing correction by the signal processing unit 202 is not enabled (ineffective), the process proceeds to step S206. On the other hand, if it is determined that focus breathing correction by the signal processing unit 202 is enabled, the process proceeds to step S207.

[0040] In the example where the lens control unit 105 receives the execution status of focus breathing correction by the signal processing unit 202, if focus breathing correction by the signal processing unit 202 is not being performed, the process proceeds to step S206. On the other hand, if focus breathing correction by the signal processing unit 202 is being performed, the process proceeds to step S207. In the example where the lens control unit 105 receives a flag to allow or prohibit the execution of focus breathing correction by the lens control unit 105, the process proceeds to step S206 if an allow flag is received, and to step S207 if a prohibit flag is received.

[0041] In step S206, the lens control unit 105 determines whether the focus breathing correction setting by the lens control unit 105 is effective or not. If the lens control unit 105 determines that the focus breathing correction setting by the lens control unit 105 is not effective (ineffective), it proceeds to step S209 without performing focus breathing correction. On the other hand, if it determines that the focus breathing correction setting by the lens control unit 105 is effective, it proceeds to step S208.

[0042] In step S207, the camera control unit 207 performs focus breathing correction using the signal processing unit 202. The camera control unit 207 may perform focus breathing correction using the signal processing unit 202 based on a signal transmitted from the lens control unit 105. Alternatively, depending on the settings, the camera control unit 207 may perform focus breathing correction using the signal processing unit 202 without receiving a signal from the lens control unit 105. After the focus breathing correction by the signal processing unit 202 is performed, the process proceeds to step S209.

[0043] In step S208, the lens control unit 105 performs focus breathing correction. After the correction by the lens control unit 105 is performed, the process proceeds to step S209. At this point, if the lens control unit 105 determines that it is not possible to perform focus breathing correction, it does not perform focus breathing correction.

[0044] In step S209, the lens control unit 105 or the camera control unit 207 determines whether the power to the imaging system 10 (at least one of the lens device 100 or the camera body 200) is OFF. If it is determined that the power is ON, the process returns to step S201. On the other hand, if it is determined that the power is OFF, this flow terminates.

[0045] In this embodiment, the focus breathing correction (second correction) by the signal processing unit 202 always takes precedence over the focus breathing correction (first correction) by the lens control unit 105. Therefore, without communicating the result of the focus breathing correction execution determination by the lens control unit 105 to the camera control unit 207, it is possible to switch whether or not to execute the focus breathing correction by the signal processing unit 202 according to the settings. In this embodiment, the priority between the first correction and the second correction is to increase the correction ratio of the other compared to the correction ratio of the other. It is also possible to perform focus breathing correction using only one of the first or second correction.

[0046] However, this embodiment is not limited to this. For example, the lens control unit 105 may communicate the result of its focus breathing correction execution determination to the camera control unit 207, and the signal processing unit 202 may switch whether or not to perform focus breathing correction based on the communicated determination result (predetermined conditions). For example, the lens control unit 105 may prioritize the execution of the second correction over the first correction, and if the predetermined conditions are satisfied, it may switch the second correction to the first correction. The communicated determination result may be either a flag that is valid when the signal processing unit 202 performs focus breathing correction, or a flag that is valid when it does not perform it.

[0047] In this embodiment, the determination of whether to perform focus breathing correction by the lens control unit 105 is performed by the lens control unit 105, but it is not limited to this, and may also be performed by the camera control unit 207. When the camera control unit 207 determines whether to perform focus breathing correction by the lens control unit 105, the camera control unit 207 transmits the determination result to the lens control unit 105 by communication with the lens control unit 105. The transmitted determination result may be either a flag that is valid when the lens control unit 105 performs focus breathing correction, or a flag that is valid when it does not perform it.

[0048] The control shown in the flowchart of Figure 2 continues to be executed after communication between the lens control unit 105 and the camera control unit 207 is established. Therefore, if the focus lens 104 is operated (focus operation) or the focus breathing correction setting information is changed, appropriate correction can be performed again.

[0049] If the communication required for the control shown in the flowchart of Figure 2 is not possible, for example, the lens control unit 105 may not perform focus breathing correction, thereby avoiding the simultaneous (parallel) execution of the two types of focus breathing correction. Alternatively, the effect of the simultaneous execution of the two types of focus breathing correction may be reduced by decreasing the correction amount of the focus breathing correction performed by the lens control unit 105.

[0050] In this embodiment, focus breathing correction by the signal processing unit 202 is performed preferentially. Furthermore, the focus breathing correction by the signal processing unit 202 is not affected by the position of the zoom lens 102 or the state of the zoom clutch 109. On the other hand, when the zoom lens 102 is at the telephoto end or wide-angle end, or when the zoom clutch 109 is in manual operation mode, the focus breathing correction by the lens control unit 105 cannot be performed. In other words, in this embodiment, by prioritizing focus breathing correction by the signal processing unit 202, the number of times the correction process switches due to reasons other than user settings is reduced. In addition, the focus breathing correction by the signal processing unit 202 can contribute to stable correction by having less residual correction and correction delay compared to the correction by the lens control unit 105. [Examples]

[0051] Next, with reference to Figure 3, the focus breathing correction process (control method of the imaging system 10) in Embodiment 2 of the present invention will be described. Figure 3 is a flowchart of the focus breathing correction process in this embodiment. In this embodiment, the process for determining whether to use the lens control unit 105 or the signal processing unit 202 to perform focus breathing correction will be described, so that the focus breathing correction by the lens control unit 105 is given priority. In this embodiment, components common to Embodiment 1 are denoted by the same reference numerals as in Embodiment 1, and their descriptions are omitted.

[0052] First, in step S301, the lens control unit 105 uses the signal from the focus position detection unit 112 to determine whether or not there has been an operation (focus operation) of the focus lens 104. The operation of the focus lens 104 may be focus drive by AF communicated from the camera control unit 207 to the lens control unit 105, or it may be focus drive by the user operating the focus operation ring. If it is determined that there has been no focus operation, the process proceeds to step S302. On the other hand, if it is determined that there has been a focus operation, the process proceeds to step S303.

[0053] In step S302, the lens control unit 105 determines whether the focus breathing correction setting information by the lens control unit 105 or the signal processing unit 202 has been changed. If it is determined that the setting information has not been changed, the process proceeds to step S310. On the other hand, if it is determined that the setting information has been changed, the process proceeds to step S303.

[0054] In step S303, the lens control unit 105 transmits the position (focus position) of the focus lens 104 to the camera control unit 207 via communication.

[0055] Next, in step S304, the lens control unit 105 determines whether or not focus breathing correction by the lens control unit 105 is effective. If it is determined that focus breathing correction by the lens control unit 105 is effective, the process proceeds to step S305. On the other hand, if it is determined that focus breathing correction by the lens control unit 105 is not effective (ineffective), the process proceeds to step S307.

[0056] In step S305, the lens control unit 105 determines whether or not focus breathing correction by the lens control unit 105 is possible. If the zoom lens 102 is at the telephoto or wide-angle end (the end of the movable range), it is determined that correction is not possible. Alternatively, if the correction by the lens control unit 105 causes the zoom lens 102 to reach the telephoto or wide-angle end (if the first correction is performed, the zoom position will reach the end of the movable range, resulting in remaining correction for the change in angle of view), it is determined that correction is not possible. Alternatively, if the zoom clutch 109 is in manual operation mode, it is determined that correction is not possible. If it is determined that focus breathing correction by the lens control unit 105 is possible, the process proceeds to step S306. On the other hand, if it is determined that focus breathing correction by the lens control unit 105 is not possible, the process proceeds to step S307.

[0057] In step S306, the lens control unit 105 transmits information to the camera control unit 207, such as a flag, indicating the decision not to perform focus breathing correction by the signal processing unit 202. In accordance with the transmitted information, the focus breathing correction by the signal processing unit 202 is not performed.

[0058] In step S307, the camera control unit 207 determines whether the focus breathing correction setting by the signal processing unit 202 is effective or not. If it is determined that the focus breathing correction setting by the signal processing unit 202 is not effective (ineffective), the process proceeds to step S310 without performing focus breathing correction. On the other hand, if it is determined that the focus breathing correction setting by the signal processing unit 202 is effective, the process proceeds to step S309.

[0059] In step S308, the lens control unit 105 performs focus breathing correction. After the correction by the lens control unit 105 is performed, the process proceeds to step S310.

[0060] In step S309, the camera control unit 207 performs focus breathing correction by the signal processing unit 202. After the focus breathing correction by the signal processing unit 202 is performed, the process proceeds to step S310.

[0061] In step S310, the lens control unit 105 or the camera control unit 207 determines whether the power to the imaging system 10 (at least one of the lens device 100 or the camera body 200) is OFF. If it is determined that the power is ON, the process returns to step S301. On the other hand, if it is determined that the power is OFF, this flow terminates.

[0062] In this embodiment, information such as a flag indicating the decision to perform focus breathing correction by the signal processing unit 202 may be transmitted before step S309.

[0063] If the communication required for the control shown in the flowchart of Figure 3 is not possible, for example, the simultaneous (parallel) execution of two types of focus breathing correction can be avoided by not performing focus breathing correction by the signal processing unit 202. Alternatively, the impact of simultaneous execution of two types of focus breathing correction can be reduced by reducing the correction amount of the focus breathing correction by the signal processing unit 202.

[0064] If focus breathing correction by the lens control unit 105 is not possible, focus breathing correction can be performed by the signal processing unit 202. Therefore, it is always possible to perform one of the focus breathing corrections. If the focus breathing correction setting by the lens control unit 105 is enabled but cannot be executed, it is not necessary to perform any focus breathing correction. Furthermore, the state in which focus breathing correction by the lens control unit 105 is not possible is not limited to the above-mentioned state, but is also possible if the zoom drive unit 108 is unable to drive.

[0065] The information transmitted in step S306 may be optical information (first optical information) that correlates the movement of the focus lens 104 with the change in the angle of view. The signal processing unit 202 performs focus breathing correction based on the received optical information. When the lens control unit 105 performs focus breathing correction, the signal processing unit 202 can be prevented from performing focus breathing correction by transmitting optical information (second optical information) that does not cause a change in the angle of view due to the movement of the focus lens 104.

[0066] In this embodiment, the lens control unit 105 determines whether to perform focus breathing correction by the lens control unit 105, but it is not limited to this, and for example, the camera control unit 207 may perform the determination. If the camera control unit 207 performs the determination, the lens control unit 105 transmits the information necessary for the determination to the camera control unit 207 before determining whether to perform the correction. The information necessary for the determination includes, for example, information on whether the correction setting by the lens control unit 105 is effective, information on whether the correction by the lens control unit 105 is being performed, or information on whether the correction by the lens control unit 105 is possible.

[0067] In this embodiment, focus breathing correction by the lens control unit 105 is always prioritized. Therefore, without communicating the result of the camera control unit 207's focus breathing correction execution decision to the lens control unit 105, it is possible to switch whether or not focus breathing correction by the lens control unit 105 is enabled according to the settings.

[0068] Thus, in this embodiment, focus breathing correction by the lens control unit 105 is performed preferentially. Furthermore, the focus breathing correction by the lens control unit 105 only involves moving the zoom lens 102 and does not involve electronic cropping or image processing. For this reason, this embodiment is highly effective in suppressing a decrease in image quality. [Examples]

[0069] Next, with reference to Figure 4, the focus breathing correction process (control method for the imaging system 10) in Embodiment 3 of the present invention will be described. Figure 4 is a flowchart of the focus breathing correction process in this embodiment. In this embodiment, the process for determining whether to use the lens control unit 105 or the signal processing unit 202 to perform focus breathing correction based on the state of the lens device 100 or the camera body 200, or the information being communicated will be described. In this embodiment, components common to Embodiment 1 are denoted by the same reference numerals as in Embodiment 1, and their descriptions are omitted.

[0070] First, in step S401, the lens control unit 105 uses the signal from the focus position detection unit 112 to determine whether or not there has been an operation (focus operation) of the focus lens 104. The operation of the focus lens 104 may be focus drive by AF communicated from the camera control unit 207 to the lens control unit 105, or it may be focus drive by the user operating the focus operation ring. If it is determined that there has been no focus operation, the process proceeds to step S402. On the other hand, if it is determined that there has been a focus operation, the process proceeds to step S403.

[0071] In step S402, the lens control unit 105 determines whether the focus breathing correction setting information by the lens control unit 105 or the signal processing unit 202 has been changed. If it is determined that the setting information has not been changed, the process proceeds to step S414. On the other hand, if it is determined that the setting information has been changed, the process proceeds to step S403.

[0072] In step S403, the lens control unit 105 transmits the position (focus position) of the focus lens 104 to the camera control unit 207 via communication.

[0073] Next, in step S404, the camera control unit 207 communicates with the lens control unit 105 to transmit setting information regarding whether focus breathing correction by the signal processing unit 202 is enabled or disabled, and information regarding the status of the camera body 200. The information regarding the status of the camera body 200 includes information regarding whether or not the signal processing unit 202 is electronically correcting image blur (vibration stabilization operation) by cropping the image.

[0074] Next, in step S405, the lens control unit 105 determines whether both the focus breathing correction settings by the lens control unit 105 and the signal processing unit 202 are enabled. If it is determined that at least one of them is disabled, the process proceeds to step S406. On the other hand, if it is determined that both are enabled, the process proceeds to step S410.

[0075] In step S406, the lens control unit 105 determines whether the focus breathing correction setting by the lens control unit 105 is effective or not. If it is determined that the focus breathing correction setting by the lens control unit 105 is not effective (ineffective), the process proceeds to step S407. On the other hand, if it is determined that the focus breathing correction setting by the lens control unit 105 is effective, the process proceeds to step S408.

[0076] In step S407, the lens control unit 105 determines whether the focus breathing correction setting by the signal processing unit 202 is effective or not. If it is determined that the focus breathing correction setting by the signal processing unit 202 is not effective (ineffective), the process proceeds to step S414 without performing focus breathing correction. On the other hand, if it is determined that the focus breathing correction setting by the signal processing unit 202 is effective, the process proceeds to step S409.

[0077] In step S408, the lens control unit 105 performs focus breathing correction. After the focus breathing correction by the lens control unit 105 is performed, the process proceeds to step S414.

[0078] In step S409, the camera control unit 207 performs focus breathing correction by the signal processing unit 202. After the focus breathing correction by the signal processing unit 202 is performed, the process proceeds to step S414.

[0079] In step S410, the lens control unit 105 determines whether or not focus breathing correction is possible based on the position of the zoom lens 102 or the state of the zoom clutch 109. If it is determined that focus breathing correction is possible by the lens control unit 105, the process proceeds to step S411. On the other hand, if it is determined that focus breathing correction is not possible by the lens control unit 105, the process proceeds to step S413.

[0080] In step S411, the lens control unit 105 determines whether or not to prioritize the focus breathing correction performed by the lens control unit 105. If it is determined that the focus breathing correction performed by the lens control unit 105 should be prioritized, the process proceeds to step S412. On the other hand, if it is determined that the focus breathing correction performed by the signal processing unit 202 should be prioritized, the process proceeds to step S413.

[0081] In step S412, the lens control unit 105 performs focus breathing correction. After the correction by the lens control unit 105, the process proceeds to step S414.

[0082] In step S413, the camera control unit 207 performs focus breathing correction by the signal processing unit 202. After the focus breathing correction by the signal processing unit 202 is performed, the process proceeds to step S414.

[0083] In step S414, the lens control unit 105 or the camera control unit 207 determines whether the power to the imaging system 10 (at least one of the lens device 100 or the camera body 200) is OFF. If it is determined that the power is ON, the process returns to step S401. On the other hand, if it is determined that the power is OFF, this flow terminates.

[0084] The result of the correction method determination by the lens control unit 105 is communicated to the camera control unit 207, allowing the camera control unit 207 to determine whether or not to perform correction using the signal processing unit 202, and enabling appropriate control of whether or not correction is performed by the signal processing unit 202. The information regarding the state of the camera body 200 transmitted from the camera control unit 207 to the lens control unit 105 is not limited to whether or not electronic image blur correction is being performed, but also includes information that contributes to determining which of the focus breathing correction methods to prioritize.

[0085] The priority determination of the focus breathing correction method in step S411 is performed based on information (predetermined determination criteria) regarding the state of the camera body 200 or the lens device 100 communicated in step S404. For example, if the priority is to always maintain image quality (suppress image quality degradation) (in the first mode), the focus breathing correction by the lens control unit 105 can be prioritized. Alternatively, for example, if video recording or continuous shooting is in progress and the priority is to suppress correction delay or remaining correction (in the second mode), the focus breathing correction (second correction) by the signal processing unit 202 can be prioritized. The priority mode (first mode or second mode) may be set by the user, or the lens control unit 105 or camera control unit 207 may switch the priority mode based on predetermined determination criteria.

[0086] Furthermore, if image blur correction is performed electronically by cropping the image, the focus breathing correction by the lens control unit 105 may be prioritized to avoid further degradation of image quality or unnatural appearance caused by cropping due to focus breathing correction. If the zoom lens 102 is at the telephoto end, wide-angle end, or at the zoom indicator position or a position set by the user, and it is not desired to move the zoom lens 102, the correction by the signal processing unit 202 may be prioritized.

[0087] The lens control unit 105 transmits information regarding the state of the lens device 100 to the camera control unit 207, and the camera control unit 207 may determine a focus breathing correction method based on the information transmitted from the lens device 100. The information transmitted from the lens device 100 is, for example, information that the camera control unit 207 is unaware of and only the lens control unit 105 is aware of. This information may include information regarding the zoom position and whether the zoom position is at the wide end or telephoto end (the end of the movable range of the zoom lens 102). Alternatively, this information may include information regarding whether the telephoto end or wide end is reached by the correction performed by the lens control unit 105 (when the first correction is performed, the zoom position reaches the end of the movable range of the zoom lens 102, resulting in a remaining correction for the change in the angle of view). Alternatively, this information may include information regarding whether the zoom clutch 109 is in a manual operation state.

[0088] In this embodiment, one of the focus breathing corrections is performed preferentially. Furthermore, by switching between the correction by the lens control unit 105 and the correction by the signal processing unit 202 depending on the state, it is highly effective in that, in addition to the effects of Embodiment 1 or Embodiment 2, a correction appropriate to the state can be performed. [Examples]

[0089] Next, with reference to Figures 5 and 6, the focus breathing correction process (control method for the imaging system 10) in Embodiment 4 of the present invention will be described. Figure 5 is a flowchart of the focus breathing correction process in this embodiment. In this embodiment, when the focus breathing correction by the lens control unit 105 and the focus breathing correction by the signal processing unit 202 are performed simultaneously (in parallel and in coordination), the process for appropriately executing each correction will be described. In this embodiment, components common to Embodiment 1 are denoted by the same reference numerals as in Embodiment 1, and their descriptions are omitted. Figure 5 is a flowchart of the control when both focus breathing corrections are enabled in Embodiment 4. The control when at least one correction is disabled is the same as in Embodiment 3.

[0090] First, in step S501, the lens control unit 105 uses the signal from the focus position detection unit 112 to determine whether or not there has been any operation (focus operation) of the focus lens 104. If it is determined that there has been no focus operation, the process proceeds to step S507. On the other hand, if it is determined that there has been a focus operation, the process proceeds to step S502.

[0091] In step S502, the lens control unit 105 transmits the position (focus position) of the focus lens 104 to the camera control unit 207 via communication.

[0092] Next, in step S503, the camera control unit 207 transmits setting information (correction setting or status information) of whether focus breathing correction is enabled or disabled by the signal processing unit 202 to the lens control unit 105.

[0093] Next, in step S504, if both focus breathing correction by the lens control unit 105 and focus breathing correction by the signal processing unit 202 are enabled, the lens control unit 105 decides to perform the correction by the signal processing unit 202. The decision result is transmitted from the lens control unit 105 to the camera control unit 207, and the camera control unit 207 performs the focus breathing correction by the signal processing unit 202.

[0094] Next, in step S505, the lens control unit 105 performs focus breathing correction and reduces the correction ratio by the signal processing unit 202 to maintain the overall correction amount. The correction ratio by the signal processing unit 202 is determined by the lens control unit 105 and transmitted to the camera control unit 207.

[0095] Next, in step S506, the lens control unit 105 sets the focus breathing correction ratio (correction rate) by the lens control unit 105 to 100% (focus breathing correction is performed solely by the lens control unit 105).

[0096] In step S507, the lens control unit 105 or the camera control unit 207 determines whether the power to the imaging system 10 (at least one of the lens device 100 or the camera body 200) is OFF. If it is determined that the power is ON, the process returns to step S501. On the other hand, if it is determined that the power is OFF, this flow terminates.

[0097] Figure 6 shows the changes in the correction ratio of the lens control unit 105 and the signal processing unit 202. In Figure 6, the horizontal axis represents time and the vertical axis represents the correction amount. T0 is the timing of step S504, which is the timing when the correction is started. T1 is the timing when the correction is completed in step S506. As shown in Figure 6, the lens control unit 105 increases the correction ratio while maintaining the overall correction amount, and performs focus breathing correction so that the angle of view does not change. In Figure 6, the correction ratio is changed linearly, but the correction ratio may be changed smoothly at timing T0 or timing T1 in accordance with the start and end of the zoom lens 102 drive.

[0098] In this embodiment, the lens control unit 105 determines the focus breathing correction method and correction ratio, but it is not limited to this, and the camera control unit 207 may also determine the focus breathing correction method and correction ratio. When the camera control unit 207 determines the correction ratio, it transmits the correction ratio determined by the lens control unit 105 from the camera control unit 207 to the lens control unit 105.

[0099] When performing two types of focus breathing correction simultaneously in this manner, appropriate correction becomes possible by determining the correction ratio. In this embodiment, by performing the correction by the signal processing unit 202 first, correction delays and incomplete corrections are less likely to occur. Furthermore, since the correction is completely switched to the lens control unit 105 at the end, it is possible to suppress a decrease in image quality. During the correction switch, by changing the correction ratio while maintaining the overall correction amount, it is possible to suppress fluctuations in the angle of view during the transition. Note that the determination of the correction ratio is not limited to the method of switching from the signal processing unit 202 to the lens control unit 105; any correction ratio may be determined when performing two types of correction simultaneously. (Other examples) The present invention can also be realized by supplying a program that implements one or more of the functions of the above-described embodiments to a system or device via a network or storage medium, and by having one or more processors in the computer of that system or device read and execute the program. It can also be realized by a circuit (e.g., an ASIC) that implements one or more functions.

[0100] According to each embodiment, it is possible to provide a lens device, an imaging device, a control device, a control method for the lens device and imaging device, and a program that can reduce the fluctuation of the angle of view caused by the movement of the focus lens.

[0101] Each embodiment's disclosure includes the following configuration and method. (Composition 1) A lens device that can be attached to and detached from an imaging device, A movable focus lens for adjusting focus, A zoom lens that changes the field of view as it moves, The system includes a control unit that performs a first correction by moving the zoom lens to reduce the change in angle of view caused by the movement of the focus lens, The control unit, It is possible to communicate with an imaging device having a processing unit that performs a second correction by processing the captured image to reduce the aforementioned fluctuation in the field of view, A lens device characterized by determining the execution of at least one of the first correction or the second correction. (Configuration 2) The lens apparatus according to configuration 1, characterized in that the control unit determines the execution of the first correction or the second correction using information regarding the status of the imaging apparatus and the lens apparatus. (Composition 3) The aforementioned state is the execution state of the second correction, The lens device according to configuration 2, characterized in that the control unit switches the second correction to the first correction when predetermined conditions are met. (Composition 4) The aforementioned state is the execution state of the second correction, The lens apparatus according to configuration 2, characterized in that the control unit decides not to perform the first correction when the second correction is being performed. (Composition 5) The aforementioned state is the execution state of the first correction, The lens apparatus according to configuration 2, characterized in that the control unit decides not to perform the second correction when the first correction is being performed. (Composition 6) The aforementioned state is a state relating to whether or not the first correction is possible. The control unit, If the first correction is possible, it is decided to perform the first correction. The lens device according to configuration 2, characterized in that if the first correction is not possible, it is decided to perform the second correction. (Composition 7) The aforementioned state is a setting state regarding whether or not to perform the second correction, The lens device according to configuration 2, characterized in that the control unit decides not to perform the first correction when the setting state is a setting state indicating that the second correction should be performed. (Composition 8) The aforementioned state is a setting state regarding whether or not to perform the first correction, The lens device according to configuration 2, characterized in that the control unit decides not to perform the second correction when the setting state is a setting state indicating that the first correction should be performed. (Composition 9) The aforementioned state is the position of the zoom lens, The lens device according to configuration 2, characterized in that the control unit determines to perform the second correction when the position of the zoom lens is at the end of the movable range of the zoom lens. (Composition 10) The aforementioned state is the position of the zoom lens, The lens device according to configuration 2, characterized in that the control unit determines to perform the second correction if, after performing the first correction, the position of the zoom lens reaches the end of the movable range of the zoom lens, resulting in a remaining correction of the variation in the angle of view. (Composition 11) The aforementioned state is the setting state for the electric or manual operation of the zoom lens. The lens device according to configuration 2, characterized in that the control unit decides to perform the second correction when the setting state is a setting state indicating manual operation. (Composition 12) The aforementioned state relates to whether or not the imaging device is performing image blur correction. The lens device according to configuration 2, characterized in that the control unit decides to perform the first correction when the imaging device is performing the image blur correction. (Composition 13) The aforementioned state is a setting state of either the first mode, which prioritizes minimizing image quality degradation, or the second mode, which prioritizes minimizing correction delay or remaining correction. The control unit, If the setting is to the first mode, it is decided to perform the first correction, The lens device according to configuration 2, characterized in that, when set to the second mode, it is determined to perform the second correction. (Composition 14) The lens device according to configuration 1, characterized in that the control unit determines to reduce the fluctuation of the angle of view by either the first correction or the second correction. (Composition 15) The lens device according to configuration 1, characterized in that when the control unit reduces the fluctuation of the angle of view by both the first correction and the second correction, it determines the correction ratio between the first correction and the second correction. (Composition 16) The lens device according to configuration 2, characterized in that the information relating to the aforementioned state is information received through communication with the imaging device. (Composition 17) The lens device according to configuration 16, characterized in that the aforementioned state is the state in which the second correction is performed. (Composition 18) The lens device according to configuration 16 or 17, characterized in that the aforementioned state is a setting state regarding whether or not to perform the second correction. (Composition 19) The lens device according to configuration 16 or 17, characterized in that the state is a state relating to whether or not the imaging device is performing image blur correction. (Composition 20) The lens device according to configuration 1, characterized in that the control unit transmits information regarding the decision made by the control unit to the imaging device through communication with the imaging device. (Composition 21) The lens device according to configuration 20, characterized in that the control unit transmits the information relating to the decision to perform the second correction to the imaging device. (Composition 22) The lens device according to configuration 20, characterized in that the control unit transmits the information relating to the decision not to perform the second correction to the imaging device. (Composition 23) The control unit, When performing the second correction, the first optical information corresponding the movement of the focus lens and the change in the angle of view is transmitted to the imaging device. The lens device according to configuration 20, characterized in that, if the second correction is not performed, second optical information is transmitted to the imaging device such that the angle of view does not change due to the movement of the focus lens. (Composition 24) The lens device according to configuration 20, characterized in that when the control unit reduces the fluctuation of the angle of view by both the first correction and the second correction, it transmits the correction ratio of the second correction to the imaging device. (Composition 25) An imaging device having a detachable lens device comprising: a focus lens that is movable for adjusting the focus; a zoom lens that changes the angle of view by movement; and a control unit that performs a first correction by moving the zoom lens to reduce the change in the angle of view caused by the movement of the focus lens, Image sensor and A processing unit that performs a second correction by processing the captured image to reduce the aforementioned fluctuation in the field of view, The lens device has a control unit that can communicate with it, The imaging apparatus is characterized in that the control unit determines the execution of at least one of the first correction or the second correction. (Composition 26) A first instruction unit that instructs the movement of the zoom lens to reduce the change in angle of view caused by the movement of the focus lens, A second instruction unit that instructs the correction of the captured image to reduce the aforementioned fluctuation in the field of view, A control device characterized by having a determination unit that determines the operation of at least one of the first instruction unit and the second instruction unit. (Method 1) A control method for a lens device that is detachable from an imaging device, The steps include: communicating with the imaging device, The process includes the step of deciding to perform at least one of a first or second correction in order to reduce the change in the angle of view due to the movement of the focus lens, In the first correction, the control unit of the lens device moves the zoom lens to reduce the fluctuation in the angle of view. A method for controlling a lens device, characterized in that, in the second correction, the processing unit of the imaging device processes the captured image to reduce the fluctuation of the field of view. (Method 2) A control method for an imaging device in which the lens device can be attached and detached, The steps include: communicating with the lens device, The process includes the step of deciding to perform at least one of a first or second correction in order to reduce the change in the angle of view due to the movement of the focus lens, In the first correction, the control unit of the lens device moves the zoom lens to reduce the fluctuation in the angle of view. A control method for an imaging device, characterized in that, in the second correction, the processing unit of the imaging device processes the captured image to reduce the fluctuation of the field of view. (Composition 27) A program characterized by causing a computer to execute the lens device control method described in Method 1. (Composition 28) A program characterized by causing a computer to execute the control method of the imaging device described in Method 2.

[0102] Although 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 its essence. Furthermore, any or all of Examples 1 to 4 may be combined. [Explanation of symbols]

[0103] 100 Lens device 102 Zoom Lens 104 Focus Lens 105 Lens control unit (control unit) 200 Camera body (imaging device) 202 Signal Processing Unit (Processing Unit)

Claims

1. A lens device that can be attached to and detached from an imaging device, A movable focus lens for adjusting focus, A zoom lens that changes the field of view as it moves, The system includes a control unit that performs a first correction by moving the zoom lens to reduce the change in the angle of view caused by the movement of the focus lens, The control unit, It is possible to communicate with an imaging device having a processing unit that performs a second correction by processing the captured image to reduce the aforementioned fluctuation in the field of view, A lens device characterized by determining the execution of at least one of the first correction or the second correction.

2. The lens apparatus according to claim 1, characterized in that the control unit determines the execution of the first correction or the second correction using information regarding the status of the imaging apparatus and the lens apparatus.

3. The aforementioned state is the execution state of the second correction, The lens device according to claim 2, characterized in that the control unit switches the second correction to the first correction when predetermined conditions are met.

4. The aforementioned state is the execution state of the second correction, The lens device according to claim 2, characterized in that the control unit decides not to perform the first correction when the second correction is being performed.

5. The aforementioned state is the execution state of the first correction, The lens device according to claim 2, characterized in that the control unit decides not to perform the second correction when the first correction is being performed.

6. The aforementioned state is a state relating to whether or not the first correction is possible. The control unit, If the first correction is possible, it is decided to perform the first correction. The lens device according to claim 2, characterized in that it is determined to perform the second correction if the first correction is not possible.

7. The aforementioned state is a setting state regarding whether or not to perform the second correction, The lens device according to claim 2, characterized in that the control unit decides not to perform the first correction when the setting state is a setting state indicating that the second correction is to be performed.

8. The aforementioned state is a setting state regarding whether or not to perform the first correction, The lens device according to claim 2, characterized in that the control unit decides not to perform the second correction when the setting state is a setting state indicating that the first correction is to be performed.

9. The aforementioned state is the position of the zoom lens, The lens device according to claim 2, characterized in that the control unit determines to perform the second correction when the position of the zoom lens is at the end of the movable range of the zoom lens.

10. The aforementioned state is the position of the zoom lens, The lens device according to claim 2, characterized in that the control unit determines to perform the second correction if, after performing the first correction, the position of the zoom lens reaches the end of the movable range of the zoom lens, resulting in a remaining correction of the variation in the angle of view.

11. The aforementioned state is the setting state for the electric or manual operation of the zoom lens. The lens device according to claim 2, characterized in that the control unit decides to perform the second correction when the setting state is a setting state indicating manual operation.

12. The aforementioned state relates to whether or not the imaging device is performing image blur correction. The lens device according to claim 2, characterized in that the control unit decides to perform the first correction when the imaging device is performing the image blur correction.

13. The aforementioned state is a setting state of either the first mode, which prioritizes minimizing image quality degradation, or the second mode, which prioritizes minimizing correction delay or remaining correction. The control unit, If the setting is to the first mode, it is decided to perform the first correction, The lens device according to claim 2, characterized in that, when set to the second mode, it is determined to perform the second correction.

14. The lens device according to claim 1, characterized in that the control unit determines to reduce the fluctuation of the angle of view by either the first correction or the second correction.

15. The lens device according to claim 1, characterized in that when the control unit reduces the fluctuation of the angle of view by both the first correction and the second correction, it determines the correction ratio between the first correction and the second correction.

16. The lens device according to claim 2, characterized in that the information relating to the aforementioned state is information received through communication with the imaging device.

17. The lens device according to claim 16, characterized in that the aforementioned state is the state in which the second correction is performed.

18. The lens device according to claim 16, characterized in that the aforementioned state is a setting state regarding whether or not to perform the second correction.

19. The lens device according to claim 16, characterized in that the aforementioned state is a state relating to whether or not the imaging device is performing image blur correction.

20. The lens device according to claim 1, characterized in that the control unit transmits information regarding the determination made by the control unit to the imaging device through communication with the imaging device.

21. The lens device according to claim 20, characterized in that the control unit transmits the information relating to the decision to perform the second correction to the imaging device.

22. The lens device according to claim 20, characterized in that the control unit transmits the information relating to the decision not to perform the second correction to the imaging device.

23. The control unit, When performing the second correction, the first optical information corresponding the movement of the focus lens and the change in the angle of view is transmitted to the imaging device. The lens device according to claim 20, characterized in that, if the second correction is not performed, second optical information is transmitted to the imaging device such that the angle of view does not change due to the movement of the focus lens.

24. The lens device according to claim 20, characterized in that when the control unit reduces the fluctuation of the field of view by both the first correction and the second correction, it transmits the correction ratio of the second correction to the imaging device.

25. An imaging device having a detachable lens device comprising: a focus lens that is movable for adjusting the focus; a zoom lens that changes the angle of view by moving it; and a control unit that performs a first correction by moving the zoom lens to reduce the change in the angle of view caused by the movement of the focus lens, Image sensor and A processing unit that performs a second correction by processing the captured image to reduce the aforementioned fluctuation in the field of view, The lens device has a control unit that can communicate with it, The imaging apparatus is characterized in that the control unit determines the execution of at least one of the first correction or the second correction.

26. A first instruction unit that instructs the movement of the zoom lens to reduce the change in angle of view caused by the movement of the focus lens, A second instruction unit that instructs the correction of the captured image to reduce the aforementioned fluctuation in the field of view, A control device characterized by having a determination unit that determines the operation of at least one of the first instruction unit and the second instruction unit.

27. A control method for a lens device that is detachable from an imaging device, The steps include: communicating with the imaging device, The process includes the step of deciding to perform at least one of a first or second correction in order to reduce the change in the angle of view due to the movement of the focus lens, In the first correction, the control unit of the lens device moves the zoom lens to reduce the fluctuation of the angle of view. A method for controlling a lens device, characterized in that, in the second correction, the processing unit of the imaging device processes the captured image to reduce the fluctuation of the field of view.

28. A control method for an imaging device in which the lens device can be attached and detached, The steps include: communicating with the lens device, The process includes the step of deciding to perform at least one of a first or second correction in order to reduce the change in the angle of view due to the movement of the focus lens, In the first correction, the control unit of the lens device moves the zoom lens to reduce the fluctuation of the angle of view. A control method for an imaging device, characterized in that, in the second correction, the processing unit of the imaging device processes the captured image to reduce the fluctuation of the field of view.

29. A program characterized by causing a computer to execute the control method for the lens device described in claim 27.

30. A program characterized by causing a computer to execute the control method of the imaging device described in claim 28.

Images