Imaging apparatus, method for controlling imaging apparatus, and program

Abstract

To reduce the start-up time of an imaging apparatus while preventing deterioration of a shutter and an image pickup device by switching the drive of a diaphragm of an interchangeable lens according to the motion of the imaging apparatus.SOLUTION: An imaging apparatus allows attachment and detachment of an interchangeable lens, and has control means that controls the drive of a diaphragm of the interchangeable lens, and motion detection means that detects the motion of the imaging apparatus. When the imaging apparatus is powered off, the control means brings the diaphragm of the interchangeable lens attached to the imaging apparatus into a first state. The control means controls the diaphragm of the interchangeable lens according to if the motion detection means detects a motion at a predetermined angle or more within a predetermined time in a state where the imaging apparatus is powered off.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an imaging apparatus to which an interchangeable lens device having a variable aperture can be attached or which is equipped with a lens device having a variable aperture. [Background technology]

[0002] Some interchangeable lens devices with variable apertures close the variable aperture when the imaging device is powered off to prevent external light that has passed through the interchangeable lens device from irradiating the shutter and imaging element in the imaging device and deteriorating them. When the power is then turned on, the variable aperture is driven to an open state to start metering. Patent Document 1 discloses an invention in which, when an interchangeable lens device is attached to an imaging device, upon detecting a power supply from the imaging device, a driving means drives the variable aperture from a closed state to an open state without receiving communication from the imaging device to control the variable aperture. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-128266 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional technology disclosed in the above-mentioned Patent Document 1, the variable aperture cannot be opened before each startup, and startup can take a long time. However, if the variable aperture is always open when the power is off in order to speed up startup, external light that passes through the lens device may be irradiated onto the shutter or image sensor in the imaging device, causing degradation. Therefore, it is necessary to appropriately control the variable aperture according to the state of the imaging device.

[0005] SUMMARY OF THE PRESENT EMBODIMENTS In view of the above, an object of the present invention is to shorten the startup time of an imaging device while preventing deterioration of the shutter and the imaging element by switching the drive of the lens aperture in response to the movement of the imaging device. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides an imaging device to which an interchangeable lens can be attached or detached, comprising a control means for controlling the driving of an aperture of the interchangeable lens and a motion detection means for detecting movement of the imaging device, wherein the control means sets the aperture of the interchangeable lens attached to the imaging device to a first state when the imaging device is turned off, and the control means controls the aperture of the interchangeable lens depending on whether the motion detection means detects movement of more than a predetermined angle within a predetermined time period when the imaging device is turned off. Effect of the Invention

[0007] According to the present invention, it is possible to provide an imaging device that reduces the startup time of the imaging device while preventing deterioration of the shutter and the imaging element. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram showing the configuration of a camera body and an interchangeable lens according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram showing an example of the configuration of a communication unit related to communication processing of the present invention. [Diagram 3] 6 is a diagram showing the lens aperture driving process in response to motion detection when the camera is turned off. [Figure 4] 1A and 1B are diagrams illustrating camera motion detection based on changes in angle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims. Although the embodiments describe a number of features, not all of these features are essential to the invention, and the features may be combined in any manner. Furthermore, in the accompanying drawings, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0010] (First embodiment) Hereinafter, the configuration and processing flow of an imaging system according to a first embodiment of the present invention will be described with reference to Fig. 1 and the like. In this embodiment, a digital camera is exemplified as an imaging device, but the present invention is not limited to this. For example, the present invention can also be applied to electronic devices having an imaging function, such as an imaging device connected to an interchangeable lens having a variable aperture, and a smartphone or tablet having an optical system with a variable aperture built-in.

[0011] 1 is a system block diagram of the entire imaging system according to the present embodiment. The imaging system is composed of an imaging device (hereinafter referred to as a camera body) 200 and an imaging system (hereinafter referred to as a camera system) including a lens device (hereinafter referred to as an interchangeable lens) 100 as an imaging accessory.

[0012] The interchangeable lens 100 is detachably attached to the camera body 200. In this camera system, a start-stop synchronous communication method is used to transmit requests for controlling various actuators from the camera to the lens, and various lens information such as the focal length, the driving state of the focus motor, the driving state of the aperture unit, and the driving state of the vibration isolation unit is transmitted from the lens to the camera. Note that in the case of an imaging device in which the lens and the camera body are integrated, all information including various lens information may be managed collectively by the imaging device.

[0013] The interchangeable lens 100 and the camera body 200 are mechanically and electrically connected via a mount 300, which is a coupling mechanism. The interchangeable lens 100 obtains power from the camera body 200 via a power terminal section (not shown) provided on the mount 300, and supplies power necessary for operation to various actuators and a lens microcomputer 111, which will be described later. In addition, the interchangeable lens 100 and the camera body 200 communicate with each other via a communication terminal section (shown in FIG. 2) provided on the mount 300.

[0014] The interchangeable lens 100 has an imaging optical system. The imaging optical system includes, in order from the subject OBJ side, a field lens 101, a zoom lens (variable magnification lens) 102 that changes the magnification, an aperture unit 114 that adjusts the amount of light, an anti-vibration lens 103, and a focus lens 104 that adjusts the focus. Note that the imaging optical system of the lens unit 100 is not limited to the configuration described above.

[0015] The zoom lens 102 and the focus lens 104 are held by lens holding frames 105 and 106, respectively. The lens holding frames 105 and 106 are guided by guide shafts (not shown) to be movable in the optical axis direction (indicated by dashed lines in the figure), and are driven in the optical axis direction by stepping motors 107 and 108. The stepping motors 107 and 108 move the zoom lens 102 and the focus lens 104, respectively, in synchronization with drive pulses. The vibration-proof lens 103 reduces image blur caused by camera shake (hand shake, etc.) by shifting in a direction perpendicular to the optical axis of the imaging optical system. The interchangeable lens 100 also includes an amplifier 142 that amplifies the output of the acceleration sensor 141.

[0016] The lens control unit 111 is, for example, a microcomputer block, and is a lens control means that controls the operation of each unit in the interchangeable lens 100. The lens control unit 111 receives actuator control request commands and lens information transmission request commands transmitted from the camera body 200 via the lens communication unit 112. In this embodiment, asynchronous communication is adopted as the communication method, and communication is performed via a data transmission terminal from the camera to the lens, a data reception terminal from the lens to the camera, and an RTC terminal that supplies communication start timing from the camera to the lens, which will be described later. Detailed communication flow control will be described later.

[0017] The lens control unit 111 performs lens control corresponding to the control request command, and transmits lens data corresponding to a lens information transmission request command to the camera body 200 via the lens communication unit 112. In addition, in response to a command related to magnification change or focusing among the control commands, the lens control unit 111 outputs drive signals to a zoom drive circuit 119 and a focus drive circuit 120 to drive the stepping motors 107 and 108. In this way, a zoom process that controls the magnification change operation by the zoom lens 102 and an AF process that controls the focus adjustment operation by the focus lens 104 are performed.

[0018] Reference numeral 130 denotes a manual focus ring, and 131 denotes an encoder sensor that detects the position of the manual focus ring.

[0019] The aperture unit 114 is configured to include aperture blades 114a and 114b. The states of the aperture blades 114a and 114b are detected by a Hall element 115 and input to the lens control unit 111 via an amplifier circuit 122 and an A / D conversion circuit 123. Although only two aperture blades are shown in FIG. 1 for convenience, the number of the aperture blades can be changed as appropriate.

[0020] The lens control unit 111 outputs a drive signal to the aperture drive circuit 121 based on an input signal from the A / D conversion circuit 123 to drive the aperture actuator 113. In this way, the light amount adjustment operation by the aperture unit 114 is controlled.

[0021] Furthermore, the lens control unit 111 drives an anti-shake actuator (such as a voice coil motor) 126 via an anti-shake drive circuit 125 in response to camera shake detected by a shake sensor (not shown) such as a vibration gyro provided in the interchangeable lens 100. This performs anti-shake processing that controls the shift operation (anti-shake operation) of the anti-shake lens 103.

[0022] The camera body 200 has an A / D conversion circuit 202 that converts image information obtained by capturing an image of a subject via the image sensor 201 from an analog signal to a digital signal. It also has a signal processing circuit 203, a recording unit 204, a camera microcomputer (hereinafter referred to as a camera control unit) 205, and a display unit 206. It also has a communication unit 208 for communication between the camera body 200 and the interchangeable lens 100.

[0023] The image sensor 201 is a photoelectric conversion element such as a CCD sensor or a CMOS sensor, etc. It photoelectrically converts a subject image formed by an imaging optical system in the interchangeable lens 100 and outputs an electrical signal (analog signal).

[0024] The A / D conversion circuit 202 converts the analog signal from the image sensor 201 into a digital signal.

[0025] The signal processing circuit 203 performs various image processing on the digital signal from the A / D conversion circuit 202 to generate a video signal, and the acquired image information is stored in a memory 210 such as a double data rate SDRAM (DDR). The signal processing circuit 203 also generates focus information indicating the contrast state of the subject image (the focal state of the imaging optical system) and luminance information indicating the exposure state from the video signal. The signal processing circuit 203 also outputs the video signal to a display unit 206, and the display unit 206 can display the video signal as a live view image used to check the composition, focus state, etc.

[0026] The non-volatile memory 209 is an electrically erasable and recordable memory, and may be, for example, an EEPROM. Constants, programs, and the like for the operation of the camera control unit 205, which will be described later, are stored in the non-volatile memory 209. The programs referred to here refer to programs and the like for executing various flowcharts, which will be described later in this embodiment.

[0027] The camera control unit 205 controls the camera body 200 in response to inputs from camera operation members such as an image capture instruction switch and various setting switches (not shown). Each process of this embodiment described below is realized by reading out the program recorded in the non-volatile memory 209 described above, expanding it in a system memory such as a RAM (not shown), and executing it. In addition, the camera control unit 205 transmits a control command related to the magnification change operation of the zoom lens 102 to the lens control unit 111 in response to the operation of a zoom switch (not shown) via a camera communication interface circuit 208, which is a communication circuit.

[0028] Furthermore, the camera control unit 205 transmits to the lens control unit 111 via the communication unit 208 control commands related to the light amount adjustment operation of the aperture unit 114 according to the brightness information and the focus adjustment operation of the focus lens 104 according to the focus information.

[0029] Next, a communication circuit configured between the camera body 200 and the interchangeable lens 100 and the communication processing performed between them will be described with reference to Fig. 2 etc. The camera control unit 205 functions as a communication method management unit and a transmission request unit. The lens control unit 111 functions as a lens data generation unit and a data transmission unit.

[0030] First, the configuration of the communication units 208, 112 arranged between the camera body 200 and the interchangeable lens 100 will be described with reference to FIG.

[0031] The camera control unit 205 and the lens control unit 111 perform data communication via communication control units 209 and 116 provided in the communication units 208 and 112. The communication control units 209 and 116 communicate via a communication terminal unit provided in the mount 300 described above. As shown in the mount 300, in this embodiment, a three-wire asynchronous serial communication method is used as the communication method. Note that the three wires referred to here are a communication request signal RTS, a communication line DCL for a camera data signal, and a communication line DLC for a lens data signal.

[0032] The communication request signal RTS is a signal sent from the camera body 200 as a communication master to the interchangeable lens 100 as a slave. The data signal DCL is a signal including a control command, a transmission request command, and the like from the camera body 200 to the interchangeable lens 100.

[0033] The data signal DCL is a signal including command information such as an actuator control request transmitted from the camera body 200 to the interchangeable lens 100. The data signal DLC is a signal including lens data and the like transmitted from the interchangeable lens 100 to the camera body 200.

[0034] When asynchronous communication is adopted, the camera body 200 and the interchangeable lens 100 do not transmit and receive data in synchronization with a common clock signal, but rather predefine the communication speed at which they communicate with each other and transmit and receive data at a communication bit rate that conforms to this predefinition. Here, the communication bit rate indicates the amount of data that can be transferred in one second, and is expressed in units of bps (bits per second).

[0035] Hereinafter, the lens aperture drive process in response to motion detection when the power supply of the camera 200 is turned OFF will be described with reference to the flowchart in Fig. 3. This flowchart is executed by the camera control unit 205 and the lens control unit 111 controlling each unit of the camera 200 and the interchangeable lens 100 according to a program.

[0036] First, in S1, the camera control unit 205 performs initialization processing of the communication port to enable communication between the interchangeable lens 100 and the camera body 200, and in S2 starts processing to obtain acceleration information as the movement of the camera body 200 using the acceleration sensor 141.

[0037] If the camera control unit 205 determines in S3 that the camera has been turned off by the power operation of the camera body 200, the process proceeds to S4. In S4, the aperture blades 114a and 114b of the interchangeable lens 100 are driven to the open position by the command of the lens control unit 111 under the command of the camera control unit. In addition, in S5, the shutter (not shown) of the camera body 200 is opened under the command of the camera control unit 205, and in S6, the camera control unit 205 turns off the power of the camera body 200 while the interchangeable lens 100 and the acceleration sensor 141 are energized, and the process proceeds to S7. In other words, turning off the power of the camera body 200 here means stopping the power supply required for processing related to photometry processing, image acquisition, image processing, etc. Note that, on the other hand, the power supply required for controlling the aperture blades of the interchangeable lens 100 and detecting the movement of the camera body 200, which will be described later, is performed.

[0038] In S7, the camera control unit 205 determines whether a lens cap (not shown) is attached to the interchangeable lens 100. As a method of determination, for example, a sensor (not shown) is provided on the attachment surface of the lens cap of the interchangeable lens 100, and the camera control unit 205 receives the detection result. Alternatively, the light entering the interchangeable lens 100 may be detected by a method in which the image sensor 201 of the camera 200 body detects the intensity of the light entering through the optical system of the interchangeable lens 100, or by providing a separate sensor for detecting the amount of light. In that case, it is sufficient to determine whether the detected amount of light is equal to or less than a predetermined value, that is, whether the situation is such that the cap is considered to be attached. Note that even if the cap is not attached, the amount of light may be equal to or less than a predetermined value depending on the state of light entering the camera, but in that case, the subsequent processing may be carried out assuming that the lens cap is attached.

[0039] If it is determined that the lens cap is not attached, the process proceeds to S8, where the camera control unit 205 acquires acceleration information from the acceleration sensor 141, performs calculation processing on the magnitude and angle changes of the movement of the camera body 200, and then proceeds to S9. After S8, the camera control unit 205 continues to acquire acceleration information from the acceleration sensor 141 in real time, and continues to monitor the movement of the camera body.

[0040] If it is determined in S7 that the lens cap is attached, the determination of whether the lens cap is attached in S7 is executed again. During this time, acquisition of the movement of the camera body 200 by the acceleration sensor 141 may be stopped. Also, if it is determined midway through that the lens cap is not attached, acquisition of the movement of the camera body 200 by the acceleration sensor 141 is resumed, and the process proceeds to S8, where the camera control unit 205 acquires acceleration information from the acceleration sensor 141.

[0041] If the movement of the camera body 200 cannot be detected within time T1 in S9, the process proceeds to S10, and the aperture blades 114a, 114b of the interchangeable lens 100 are driven to a small aperture state. Here, a case in which the movement of the camera body 200 cannot be detected includes, for example, a case in which the amount of movement of the camera body 200 calculated in S9 does not satisfy a predetermined amount.

[0042] A case where the amount of movement of the camera body 200 is less than a predetermined amount is assumed to be, for example, a case where the user leaves the camera stationary after turning off the power of the camera body 200. In such a situation, it is determined that it will be a long time before the user turns the power of the camera body 200 ON again, so it is preferable to drive the aperture blades 114a and 114b of the interchangeable lens 100 to a small aperture state to prevent deterioration of the shutter and the image sensor. Therefore, as described in S9, the aperture blades of the interchangeable lens 100 are driven to a small aperture state. After that, the process proceeds to S11.

[0043] Here, with reference to FIG. 4, the detection of the camera's motion when the camera's power is OFF will be described. In FIG. 4, the range of angles at which light can be collected on the sensor, which is the camera body image sensor 201, is represented as θ. Here, θ differs depending on the interchangeable lens 100 attached to the camera body, so it may be stored in a non-volatile memory (not shown) of the lens control unit 111, and may be acquired by communication between the lens control unit and the camera control unit 205. Here, an acceleration sensor is used to determine whether the change in the camera angle within a predetermined time is within the range of θ. The predetermined time may be, for example, about 5 seconds. If the change in the camera angle is within the range of θ, that is, if the movement of the camera body 200 is small, when sunlight or the like enters, it will be collected on the sensor. Therefore, it is preferable to set the aperture blades of the interchangeable lens 100 to a small aperture state. On the other hand, if a movement of the camera body 200 that exceeds the range of θ is detected, it can be determined that a situation in which light continues to be collected on the sensor is unlikely to occur. Therefore, it can be determined that the aperture blades of the interchangeable lens 100 can be kept open.

[0044] Even if the change in the camera angle exceeds the range of θ, the aperture blades 114a, 114b of the lens 100 may be set to a small aperture state when incoming light is detected by the image sensor 201 of the camera 200 body or a separate sensor that detects the amount of light.

[0045] In S11, the camera control unit 205 determines whether or not movement of the camera body 200 has been detected within time T1 from when the aperture blades of the lens 100 have been driven to the small aperture state. The method of detecting movement of the camera body 200 is the same as the processing content of S8, and may be used to determine whether movement of a predetermined angle or more has been detected, for example.

[0046] If movement of the camera body 200 is detected in S11, the process proceeds to S12, where the aperture blades 114a, 114b of the lens 100 are driven to the open position, and the process proceeds to S13. Here, it is assumed that the movement of the camera body 200 is detected when, for example, the user lifts or moves the camera in order to use it. In other words, it is determined that there is a high possibility that the user will subsequently turn on the power of the camera body 200, and the aperture blades of the lens 100 are driven to the open position in advance. On the other hand, if movement of the camera body 200 is not detected in S11, the process in S11 is executed again.

[0047] In S13, the camera control unit 205 determines whether the power of the camera body 200 has been turned on by an operation on the power supply.

[0048] If it is not determined in S13 that the power supply of the camera body 200 has been turned ON (the operation to turn ON has been performed), the process proceeds to S14. In S14, if the time T2 has elapsed after the determination in S13, the process of S10 is performed, and the aperture blades of the interchangeable lens 100 are driven to the small aperture position. This allows priority to be given to protection of the shutter and the image sensor when the movement of the camera body 200 detected in S11 is not, for example, a movement intended for the user to use the camera (the power supply has not been turned ON for a predetermined period of time or more). Also, at this time, T2 is set to a time longer than T1. This is because the aperture blades of the interchangeable lens 100 are once set to the open position in S12, and by providing a somewhat longer grace period, there is an advantage in preventing the state of the aperture blades from frequently changing.

[0049] Even if time T2 has not yet elapsed, if incoming light is detected by image sensor 201 of camera 200 body or a separate sensor that detects the amount of light, aperture blades 114a and 114b of lens 100 may be set to a small aperture state.

[0050] If it is determined in S13 that the power of the camera body 200 has been turned ON (an operation to turn it ON has been performed), the process proceeds to S15. In S15, the camera body 200 starts photometry processing via the image sensor 201, and starts live view display processing in S16. At this time, the aperture blades of the interchangeable lens 100 have already been opened in S12, so photometry processing can start more quickly than when the aperture blades are in the closed position. As a result, the startup time from when it is determined that the power is ON in S13 to the live view display processing in S16 is shortened, making it possible to improve user convenience.

[0051] As explained above, if it is determined that the user intends to turn the power on, the lens aperture is opened in advance, so that when the power is turned on, the metering process can be performed without waiting for the lens aperture to be opened. This allows the camera to start up more quickly than if the aperture was closed.

[0052] Second embodiment The second embodiment of the present invention has the same configuration as the first embodiment, but will be described below with reference to the case where the camera battery (not shown) is removed when the power supply to the camera body 200 is turned off. When the camera battery is removed, the aperture state cannot be controlled using the battery thereafter.

[0053] Therefore, in this embodiment, a capacitor (not shown) is prepared in the camera, and the capacitor is charged while the battery is attached. Then, when the camera battery (not shown) is removed, the electrical energy charged in the capacitor is used to set the aperture blades 114a and 114b of the lens 100 to a small aperture state.

[0054] Here, the aperture blades of lens 100 are set to a small aperture because it is expected that the user will rarely use the camera immediately after removing the battery, and therefore priority is given to preventing deterioration of the shutter and image sensor.

[0055] (Third embodiment) The third embodiment of the present invention has the same configuration as the first embodiment, but when the power supply of the camera body 200 is turned off, the focus position of the interchangeable lens 100 is driven to be out of focus on the image sensor 201. This makes it possible to suppress the amount of collected light and prevent deterioration of the shutter and the image sensor, even if the camera body 200 is left in a state where it can collect light.

[0056] <Other embodiments> Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention.

[0057] The present invention can also be realized by a process in which a program for implementing one or more of the functions of the above-described embodiments is supplied to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device read and execute the program. The present invention can also be realized by a circuit (e.g., ASIC) for implementing one or more of the functions. [Explanation of symbols]

[0058] 100 Interchangeable Lenses 101 Field Lens 102 Zoom Lens 103 Anti-vibration lens 104 Focus Lens 105 Lens holding frame 106 Lens holding frame 107 Stepping motor 108 Stepping motor 111 Lens control unit 112 Communication unit (lens side) 113 Aperture Actuator 114 Aperture unit 115 Hall element 119 Zoom driver circuit 120 Focus drive circuit 121 Aperture drive circuit 122 Amplification circuit 123 A / D conversion circuit 125 Anti-vibration drive circuit 126 Anti-vibration actuator 130 Manual focus ring 131 Encoder Sensor 141 Acceleration Sensor 142 Amplifier 200 Camera body 201 Image sensor 202 A / D conversion circuit 203 Signal Processing Circuit 204 Recording Department 205 Camera control unit 206 Display section 207 Display magnification operation section 208 Communication unit (camera side) 300 Mount

Claims

1. An imaging device to which an interchangeable lens can be attached and detached, A control unit for controlling the driving of the aperture of the interchangeable lens; a motion detection means for detecting a motion of the imaging device, the control means sets the aperture of the interchangeable lens attached to the imaging device to a first state when the imaging device is powered off; an imaging device characterized in that the control means controls the aperture of the interchangeable lens depending on whether the motion detection means detects movement of more than a predetermined angle within a predetermined time while the imaging device is turned off.

2. 2. The imaging device according to claim 1, wherein, when the motion detection means detects motion of equal to or greater than the predetermined angle within the predetermined time, the control means holds the aperture of the interchangeable lens in the first state.

3. 2. The image pickup apparatus according to claim 1, wherein the predetermined angle is a value determined for each of the interchangeable lenses.

4. The camera further includes a determination unit for determining whether a cap is attached to the interchangeable lens, 2. The imaging device according to claim 1, wherein, when the determination means determines that a cap is attached to the interchangeable lens, the control means maintains the aperture of the interchangeable lens in the first state when the imaging device is turned off.

5. 5. The image pickup apparatus according to claim 4, wherein said motion detection means stops detecting the motion while said determination means determines that a cap is attached to said interchangeable lens.

6. 6. The image pickup apparatus according to claim 5, wherein, when the determining means determines that a cap is not attached to the interchangeable lens, the motion detecting means resumes detecting the motion.

7. 2. The imaging device according to claim 1, wherein if the motion detection means does not detect motion of greater than the specified angle within the specified time, the control means sets the aperture of the interchangeable lens to a second state different from the first state.

8. 2. The imaging device according to claim 1, wherein when the motion detection means detects motion of equal to or greater than the specified angle within the specified time, but the imaging device is kept powered off for a first time period longer than the specified time period, the control means sets the aperture of the interchangeable lens to a second state different from the first state.

9. A detection unit for detecting light entering the interchangeable lens is further provided.

2. The image pickup apparatus according to claim 1, wherein, when said detection means detects incident light, said control means sets the aperture of said interchangeable lens to a second state different from said first state.

10. 10. The imaging apparatus according to claim 1, wherein the first state is a state in which the aperture of the interchangeable lens is fully open.

11. 10. The imaging apparatus according to claim 8, wherein the second state is a state in which the aperture of the interchangeable lens is set to a small aperture.

12. A method for controlling an imaging device to which an interchangeable lens can be attached and detached, comprising the steps of: a control step of controlling the driving of the aperture of the interchangeable lens; a motion detection step of detecting a motion of the imaging device, In the control step, when the power supply of the imaging device is turned off, the aperture of the interchangeable lens attached to the imaging device is set to a first state; a control step of controlling the aperture of the interchangeable lens depending on whether or not, in the motion detection step, motion of a predetermined angle or more is detected within a predetermined time period while the imaging device is turned off.

13. A program for causing a computer to execute each step of the method for controlling an imaging apparatus according to claim 12.

14. A computer-readable storage medium storing the program according to claim 13.

Images