JP2021063875A - Control unit, imaging apparatus, imaging system, control method, and program - Google Patents

Abstract

To provide a control unit that can select appropriate diaphragm control based on a photography condition.SOLUTION: A control unit (102) has: setting means (102a) that can set a first photographing mode for performing photographing while driving light shielding means that blocks a light beam incident on imaging means and a second photographing mode for performing photographing by using an electronic shutter function; and diaphragm control means (102b) that controls diaphragm means. The diaphragm control means has a first driving mode for driving the diaphragm means to achieve a target diaphragm value through a reference diaphragm value, and a second driving mode for inhibiting the drive of the diaphragm means during exposure during which the imaging means records a still image and driving the diaphragm means to achieve the target diaphragm value not through the reference diaphragm value while the imaging means does not record the still image. When performing photographing by using the same interchangeable lens, in the first photographing mode, the control unit drives the diaphragm means in the first driving mode, and in the second photographing mode, drives the diaphragm means in the second driving mode.SELECTED DRAWING: Figure 3

Description

The present invention relates to an imaging device to which an interchangeable lens can be attached and detached.

Conventionally, in order to reduce the effect of hysteresis when the aperture is driven and reversed, the aperture is driven to the open end for metering and distance measurement, and then driven in one direction from the open end to the small aperture side to reach the target aperture value. An imaging device that controls the aperture is known. Further, in order to drive the diaphragm at a higher speed, a method has been proposed in which the opening operation of driving the diaphragm to the open end is omitted and the diaphragm is directly driven to the target diaphragm value. In such a method, since the opening operation is not performed every time, the hysteresis generated at the time of drive reversal of the diaphragm may affect the actual diaphragm value. Therefore, in Patent Document 1, by outputting different drive instruction values depending on whether the aperture is driven from the open side to the small aperture side or from the small aperture side to the open side, hysteresis at the time of drive reversal can be obtained. Imaging devices that reduce are disclosed.

Japanese Unexamined Patent Publication No. 2013-231821

However, in the image pickup apparatus disclosed in Patent Document 1, the hysteresis at the time of drive reversal is measured in advance, and the drive instruction value satisfying the desired aperture accuracy at the time of drive reversal can be obtained in advance with each lens, or the actual aperture can be obtained. The value needs to be measured. For this reason, the number of components of the interchangeable lens increases, the manufacturing time and effort are required, and the cost increases. In addition, it may not be possible to newly apply it to a lens already sold in the market and owned by a user. As a result, it is difficult to perform appropriate aperture control according to the shooting conditions.

Therefore, an object of the present invention is to provide a control device, an imaging device, an imaging system, a control method, and a program capable of selecting suitable aperture control based on imaging conditions.

The control device as one aspect of the present invention uses the first photographing mode in which a light-shielding means for blocking the light beam incident on the imaging means is driven to perform photographing, and the electronic shutter function of the imaging means to perform photographing. It has a setting means capable of setting a second shooting mode and an aperture control means for controlling the aperture means, and the aperture control means sets the aperture means so as to reach a target aperture value via a reference aperture value. The first drive mode for driving and the driving of the aperture means are prohibited during the exposure in which the imaging means is recording a still image, and while the imaging means is not recording the still image, the said When a second drive mode for driving the aperture means so as to reach the target aperture value without going through a reference aperture value and shooting is performed using the same interchangeable lens, the first imaging mode is used. The aperture means is driven in the first drive mode, and the aperture means is driven in the second drive mode in the second shooting mode.

Other objects and features of the present invention will be described in the following embodiments.

According to the present invention, it is possible to provide a control device, an imaging device, an imaging system, a control method, and a program capable of selecting suitable aperture control based on imaging conditions.

It is a block diagram of the camera system in each embodiment. It is explanatory drawing of the diaphragm value error by the drive direction of the diaphragm in each embodiment. It is a flowchart which shows the setting method of the diaphragm drive mode in 1st Embodiment. It is explanatory drawing of the diaphragm drive system and the exposure timing in 1st Embodiment. It is explanatory drawing of the diaphragm drive system and the exposure timing in 2nd Embodiment. It is a flowchart which shows the setting method of the diaphragm drive mode in 3rd Embodiment.

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

(First Embodiment)
First, the configuration of the camera system (imaging system) according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of the camera system 10. The camera system 10 includes a camera body 100 and an interchangeable lens 200 that can be attached to and detached from the camera body 100.

The interchangeable lens 200 has a lens 205 such as a focus lens. The diaphragm (aperture means) 201 is configured to include a plurality of diaphragm blades (not shown) and an opening / closing mechanism (not shown) for opening and closing the plurality of diaphragm blades, and is driven by the diaphragm drive means 202. The diaphragm 201 is a so-called iris diaphragm in which a part of a plurality of diaphragm blades arranged around the optical axis overlaps each other to form a diaphragm opening on the optical axis. In addition to the diaphragm blades, the diaphragm 201 includes an aperture member having a predetermined diaphragm value on the optical axis, and the diaphragm blades retract to the outside of the aperture member, that is, are driven to the open end, so that the diaphragm 201 has a fixed diaphragm value. (Aperture value in a state where the aperture 201 is driven to the open end) is realized. The image pickup optical system is composed of the lens 205 and the aperture 201.

The diaphragm driving means 202 is configured to include a stepping motor and is controlled by the lens CPU 203. The aperture 201 can be driven in a first drive direction from the open side to the small aperture side and a second drive direction from the small aperture side to the open side. The lens CPU 203 transmits and receives various information to and from the camera CPU 102 via the lens communication means 204 and the camera communication means (communication means) 109, and controls the entire operation of the interchangeable lens 200 together with the camera CPU 102.

In the camera body 100, the image pickup means 101 includes an image pickup element such as a CMOS sensor that photoelectrically converts a subject image (optical image) formed by a luminous flux (shooting light flux) from the interchangeable lens 200. A digital video signal is generated by amplifying and performing various image processing on the image pickup signal output from the image pickup means 101 by an image processing circuit (not shown).

The imaging means 101 has an electronic shutter function, and the exposure second time (shutter speed) can be adjusted by a control pulse, but the exposure second time can also be adjusted by a mechanical shutter (light-shielding means) 103 described later. The electronic shutter function is a so-called slit rolling shutter in which the timing of the start and end of charge accumulation is different for each line. The electronic shutter function does not generate vibration or noise when driving the mechanical shutter 103, but tends to cause rolling shutter distortion when shooting a subject moving at high speed.

The camera CPU (control device) 102 controls the mechanical shutter 103 based on the information from the focus detecting means 104 and the light measuring means 105, which will be described later. Further, the camera CPU 102 controls a lens 205 such as a focus lens and an aperture 201 via the lens CPU 203. Further, the camera CPU 102 uses the digital video signal to generate a still image for recording, a moving image for display, and a moving image for recording. The display moving image is displayed on the display means 107 including a display element such as an LCD panel. The still image for recording and the moving image for recording are recorded on a recording medium such as a semiconductor memory by the recording means 106.

The camera CPU 102 includes a setting means 102a and an aperture control means 102b. The setting means 102a has a first shooting mode in which a mechanical shutter (light-shielding means) 103 that blocks a light flux incident on the imaging means 101 is driven to perform shooting, and a first shooting mode in which the electronic shutter function of the imaging means 101 is used to perform shooting. Two shooting modes can be set. The aperture control means 102b controls the aperture (aperture means) 201. The aperture control means 102b can control the aperture 201 of the interchangeable lens 200 via the camera communication means (communication means) 109. The functions of the setting means 102a and the aperture control means 102b will be described later.

The mechanical shutter 103 has a plurality of shutter blades, and causes the imaging means 101 to irradiate the incident light flux (photographing light flux) for a desired time. During the exposure seconds controlled by the mechanical shutter 103, individual variations occur due to differences in component dimensions and friction conditions for each individual, and even for the same individual, the degree of looseness of the components, changes in sliding resistance due to temperature shrinkage, and shooting due to posture differences. There will be an error due to variations from shot to shot.

The focus detection means 104 detects the focal state of the image pickup optical system based on the image pickup signal from the image pickup means 101 or the digital image signal generated by the image processing circuit (not shown). Then, the focus information indicating the focus state is output to the camera CPU 102. Based on the focus information, the camera CPU 102 controls and drives a focus lens unit (not shown) in the interchangeable lens 200 to obtain a focused state.

The photometric means 105 calculates the subject luminance based on the image pickup signal from the image pickup means 101 or the digital video signal generated by the image processing circuit (not shown), and outputs the subject luminance as photometric information to the camera CPU 102. Based on the photometric information, the camera CPU 102 calculates and controls the aperture value (F value) to be set in the aperture 201 and the exposure seconds of the mechanical shutter 103 that controls the exposure amount of the imaging means 101 when shooting a still image. To do.

The operation means 108 is operated when the user sets the camera body 100 or performs a shooting operation. The user either shoots using the mechanical shutter 103 (shooting in the first shooting mode) via the operating means 108, or shoots using the electronic shutter function of the imaging means 101 (second shooting). It is possible to select whether to perform shooting in mode). The camera CPU 102 functions as a setting means for setting the first shooting mode or the second shooting mode based on the operation of the user. Further, the user can select the continuous shooting mode or the single shooting mode via the operating means 108, and the camera CPU 102 can set the selected mode. Further, depending on the selection, the drive mode of the aperture 201 can be selected in advance.

Next, the drive mode of the aperture 201 will be described with reference to FIG. FIG. 2 is an explanatory diagram of an aperture value error depending on the driving direction of the aperture 201. As shown in FIG. 2, in the present embodiment, the aperture 201 has an aperture value (open aperture value) of F2.8 at the open end and an aperture value (minimum aperture value) of F22 at the small aperture end. In FIG. 2, the aperture value error of the actual aperture value with respect to the ideal aperture value when the aperture 201 is stopped down in the first drive direction (direction from the open side to the small aperture side) is shown by a solid line. ..

Generally, due to the dimensional error of the internal parts of the aperture 201 and load fluctuations such as frictional force, the actual aperture value of the aperture 201 actually has an error (aperture value error) within a certain standard with respect to the ideal aperture value. ). However, by controlling the aperture 201 to reach the next target aperture value via a predetermined reference aperture value each time a still image is taken, the backlash direction of the internal parts of the aperture 201 and the sliding direction between the blades can be determined. It can be made constant to reduce the variation in aperture value error. This control is called a first drive mode.

On the other hand, the control of directly reaching the next target aperture value of the aperture 201 without going through a predetermined reference aperture value for each shooting of a still image is called a second drive mode. In the second drive mode, the target aperture value may be reached from either the first drive direction or the second drive direction. However, as shown by the dotted line in FIG. 2, when the aperture 201 is driven in the second drive direction (the direction from the small aperture side to the open side), there is play in the opposite direction when the drive of the aperture 201 is reversed. The sliding direction of the blades is different from that of the first driving direction. Therefore, even if the aperture value is the same, the actual aperture value will differ depending on the driving direction. Therefore, when the interchangeable lens 200 designed and manufactured on the premise of shooting in the first drive mode is driven in the second drive mode, the influence of hysteresis at the time of drive reversal may deteriorate the exposure accuracy of the image. There is.

Next, with reference to FIG. 3, a method (selection method) of setting the drive mode of the aperture 201 at the time of shooting in the present embodiment will be described. FIG. 3 is a flowchart showing a method of setting the drive mode of the aperture 201 in the present embodiment. Each step in FIG. 3 is mainly executed by the camera CPU 102 (aperture control means 102b).

First, in step S300, the user instructs a shooting operation (first shooting mode or second shooting mode) via the operating means 108. Then, the camera CPU 102 acquires the information regarding the shooting mode (first shooting mode or second shooting mode) instructed by the user, and sets the first shooting mode or the second shooting mode.

Subsequently, in step S301, the camera CPU 102 determines whether or not a shooting mode (first shooting mode) using the mechanical shutter (light-shielding means) 103 is selected. If the shooting mode using the mechanical shutter 103 is selected, the process proceeds to step S302. In step S302, the camera CPU 102 sets the drive mode of the aperture 201 to the first drive mode.

On the other hand, if the shooting mode using the mechanical shutter 103 is not selected in step S301, the process proceeds to step S303. In step S303, the camera CPU 102 determines whether or not the continuous shooting mode is set because the shooting mode (second shooting mode) that uses the electronic shutter function of the imaging means 101 is selected. When the continuous shooting mode is not set in step S303, that is, in the single shooting mode, it is not necessary to drive immediately toward the next target aperture value. Therefore, the process proceeds to step S304, and the camera CPU 102 sets the drive mode of the aperture 201 to the first drive mode. Here, the first drive mode is a mode in which the diaphragm 203 is driven so as to reach the target diaphragm value via the reference diaphragm value.

On the other hand, if the continuous shooting mode is set in step S303, the process proceeds to step S305. In step S305, the camera CPU 102 determines whether or not the interchangeable lens 200 in which the second drive mode is permitted is attached to the camera body 100. If the interchangeable lens 200 for which the second drive mode is not permitted is attached to the camera body 100, the process proceeds to step S304. In step S304, the camera CPU 102 sets the drive mode of the aperture 201 to the first drive mode. On the other hand, when the interchangeable lens 200 in which the second drive mode is permitted is attached to the camera body 100, the process proceeds to step S306.

In step S306, the camera CPU 102 determines whether or not the second drive mode is selected as the drive mode of the aperture 201 by the user. Here, in the second drive mode, the drive of the aperture 203 is prohibited during the exposure in which the image pickup means 101 is recording a still image, and the reference aperture value is set while the image pickup means 101 is not recording a still image. This is a mode in which the aperture 203 is driven so as to reach the target aperture value without going through. If the second drive mode is not selected, the process proceeds to step S304. In step S304, the camera CPU 102 sets the drive mode of the aperture 201 to the first drive mode. On the other hand, if the second drive mode is selected, the process proceeds to step S307. In step S307, the camera CPU 102 sets the drive mode of the aperture 201 to the second drive mode.

Next, with reference to FIG. 4, the driving method and the exposure timing of the aperture 201 during shooting will be described. FIG. 4 is an explanatory diagram of a driving method and an exposure timing of the aperture 201 during photographing in the present embodiment. In FIG. 4, the state in which time elapses in the right direction, the state of the aperture 201 and the state of the mechanical shutter 103 are shown in the vertical direction, respectively, and the state in which the aperture 201 changes the aperture value during the shooting operation is indicated by arrows. Further, the exposure section exposed by the imaging means 101 for recording the still image is indicated by a solid arrow, and the LV that does not record the still image but performs the exposure for displaying the display moving image on the display means 107. (Live view) The section is indicated by a dotted arrow.

In FIG. 4A, as in the case of step S302 in FIG. 3, when the interchangeable lens 200 is attached to the camera body 100 and the imaging means 101 controls the exposure second time by the mechanical shutter 103, the aperture 201 is the first. It shows how it is driven in the drive mode of 1. For the sake of simplicity, the case of the continuous shooting mode is shown as an example, but in the case of the single shooting mode, the shooting is completed in one shot. This point is the same in the case of FIG. 4B.

As shown in FIG. 4A, in the first drive mode, in the first drive mode, the camera CPU 102 once drives the aperture 201 to the open end for each still image shooting, and then the target diaphragm for the next shooting. The drive is reversed toward the value, and the drive direction is always limited to the first drive direction for control. Further, in order to prevent the stepping motor of the aperture driving means 202 from stepping out, it is necessary to provide a certain pause time before the drive is reversed, which is disadvantageous in terms of time in continuous shooting, but the aperture value error is The influence of hysteresis during drive reversal can be reduced. The mechanical shutter 103 controls the exposure seconds by moving the shutter blades from the standby state at high speed in the exposure section. After the exposure is completed, a charging operation is required every time to return the shutter blades to the standby state in time for the next exposure section. As described above, according to the drive method of FIG. 4A, it is possible to reduce the influence of the variation of the aperture value error due to the hysteresis at the time of drive reversal of the aperture 201 on the exposure accuracy of the captured image, and the electronic shutter function. It is not necessary to consider the influence of the rolling shutter distortion in.

In FIG. 4B, as in the case of step S304 in FIG. 3, the same interchangeable lens 200 as in FIG. 4A is attached to the camera body 100, and the imaging means 101 controls the exposure seconds by the electronic shutter function. When the aperture 201 is being driven, it is shown that the aperture 201 is being driven in the first drive mode.

After the exposure for recording the still image is completed, the exposure for displaying the moving image for display on the display means 107, that is, the live view (LV) is performed, although the exposure is not recorded on the still image. When the live view is completed, the camera CPU 102 calculates the aperture value for the next exposure section from the photometric information calculated by the photometric means 105, and if it is necessary to drive the aperture 201, the aperture 201 is first driven. Drive in mode. The aperture 201 has converged to the target aperture value before the start of the next exposure section, and is not driven during the exposure section. At this time, since the electronic shutter function is used, it is not necessary to perform the charging operation for each exposure section as in the case of using the mechanical shutter 103. Therefore, it is possible to reduce the influence of the gear drive noise and vibration caused by the motor drive when charging the mechanical shutter 103, and when quietness is required at the time of shooting or when it is desired to reduce blurring of the subject image, FIG. The drive system of (b) is effective.

In FIG. 4C, as in the case of step S307 in FIG. 3, the same interchangeable lens 200 as in FIGS. 4A and 4B is attached to the camera body 100, and the imaging means 101 is exposed in seconds by the electronic shutter function. The state in which the aperture 201 is being driven in the second drive mode is shown. In the case of FIG. 4C as well, similarly to FIG. 4B, the camera CPU 102 calculates the aperture value for the next exposure section from the photometric information calculated by the photometric means 105 when the live view is completed. If necessary, the aperture 201 is driven in the second drive mode. The aperture 201 has converged to the target aperture value before the start of the next exposure section, and is not driven during the exposure section.

As shown in FIG. 4C, in the second drive mode, the drive direction immediately before reaching the target aperture value may be both the first drive direction and the second drive direction. When driven in the second drive mode, it can be driven directly to the target aperture value, so compared to the first drive mode, the section in which the aperture 201 must be driven during the shooting operation (section T in FIG. 4). ) Can be shortened. Further, since the pause time required for drive reversal can be superimposed on the exposure section of the imaging means 101, it is advantageous in terms of time in continuous shooting.

On the other hand, the electronic shutter function of the imaging means 101 used in FIG. 4C is a function of electronically controlling the exposure seconds by the pulse signal output by the camera CPU 102, and therefore the exposure seconds due to the mechanical configuration. There is no time error. Therefore, in the drive method of FIG. 4 (c), the influence of the exposure second time error of the mechanical shutter 103 in the method of FIG. 4 (a) can be reduced, and the hysteresis at the time of drive reversal of the aperture 201 can be reduced accordingly. It is possible to reduce the influence of the variation in aperture value error on the exposure accuracy of the captured image. Further, as described above, since the time required for the aperture 201 to be driven between the exposure sections can be shortened, the speed of continuous shooting is increased as compared with the driving methods of FIGS. 4A and 4B. It is possible.

However, the interchangeable lens 200 has a large variation in aperture value error due to hysteresis during drive reversal of the aperture 201, and even if the exposure second time error is reduced by the electronic shutter function, the exposure of the captured image is deteriorated to a considerable extent. The second drive mode is not allowed. In that case, even if the user tries to select the second drive mode, the camera CPU 102 controls to drive the aperture 201 in the first drive mode (step S305 in FIG. 3).

In the present embodiment, the aperture control means 102b has a first drive mode and a second drive mode. The first drive mode is a drive method in which the diaphragm 291 is driven so as to reach a target diaphragm value via a reference diaphragm value. In the second drive mode, the drive of the aperture 201 is prohibited during the exposure in which the image pickup means 101 is recording a still image, and the reference aperture value is used while the image pickup means 101 is not recording a still image. This is a drive system that drives the aperture 201 so as to reach the target aperture value without using the aperture 201. When the aperture control means 102b uses the same interchangeable lens 200 for shooting, the diaphragm 201 is driven in the first drive mode in the first shooting mode, and the diaphragm 201 is second in the second shooting mode. Drive in the drive mode of.

Preferably, the aperture control means 102b can drive the aperture 201 in the first drive mode in the second photographing mode. More preferably, the aperture control means 102b drives the aperture 201 in the first drive mode when the interchangeable lens 200 does not allow the aperture 201 to be driven in the second drive mode in the second photographing mode. .. Further, preferably, in the second photographing mode, the aperture control means 102b prohibits the driving of the aperture 201 during the exposure for the image pickup means 101 to record a still image, and when the image pickup means 101 is not exposed. The aperture 201 is driven at the first speed. Further, in the second shooting mode, the diaphragm control means 102b stops the diaphragm 201 or drives the diaphragm 201 at a second speed during exposure for displaying a display moving image without recording a still image by the imaging means 101.

As described above, in the present embodiment, when the same interchangeable lens 200 is attached to the camera body 100, it is possible to select (change) the drive method (drive mode) of the aperture 201 based on the shooting mode. That is, in the case of the first shooting mode in which the mechanical shutter 103 is used for shooting, the camera CPU 102 controls the aperture 201 in the first drive mode. On the other hand, in the second shooting mode in which shooting is performed using the electronic shutter function of the imaging means 101, the camera CPU 102 controls the aperture 201 in the second drive mode. As a result, it is possible to select the drive mode of the aperture 201 that is optimal for the speed and exposure accuracy of continuous shooting for each shutter method selected by the user.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. For the sake of simplicity, the description common to the first embodiment will be omitted. FIG. 5 is an explanatory diagram of a diaphragm drive method and an exposure timing in the present embodiment. 5 (a) and 5 (b) show when the interchangeable lens 200 is attached to the camera body 100 and the imaging means 101 controls the exposure seconds by the electronic shutter function as shown in FIG. 4 (c). A modified example of the case where the aperture 201 is driven in the second drive mode is shown.

FIG. 5A shows, unlike FIG. 4C,, after the exposure section is completed, the aperture 201 is driven in the second drive mode even during the live view section. By controlling in this way, an exposure change occurs in the display moving image of the frame in which the aperture 201 is driven during the LV section, but there is no substantial problem as long as the user does not feel any particular discomfort. On the other hand, since the aperture 201 can be driven even during the LV section, further speedup can be expected.

In FIG. 5B, the driving speed of the aperture 201 is changed between the end of the live view section and the next exposure section. By controlling in this way, it is possible to quickly drive the aperture 201 in the unexposed section while suppressing the exposure change of the display moving image acquired during the live view section.

(Third Embodiment)
Next, a third embodiment of the present invention will be described. For the sake of simplicity, the description common to each of the above-described embodiments will be omitted. This embodiment describes a case where a plurality of interchangeable lenses (first interchangeable lens and second interchangeable lens) of different types exist as the interchangeable lens 200 that can be attached to and detached from the camera body 100. The first interchangeable lens is an interchangeable lens designed and manufactured on the premise that the aperture 201 is driven in the first drive mode, as described in each of the above-described embodiments. On the other hand, the second interchangeable lens is an interchangeable lens designed and manufactured on the premise that the aperture 201 is driven in the second drive mode. Further, the second interchangeable lens measures the hysteresis at the time of drive reversal of the diaphragm 201 in advance and can correct the target diaphragm value, or is provided with an actual diaphragm measuring means. The second interchangeable lens can also be driven in the first drive mode. Each interchangeable lens can be attached directly to the camera body 100 or via an adapter (not shown).

FIG. 6 is a flowchart showing a method of setting the drive mode of the aperture 201 in the present embodiment. Each step of FIG. 6 is mainly executed by the camera CPU 102 (aperture control means 102b). Since steps S300 to S307 in FIG. 6 are the same as steps S300 to S307 in FIG. 3 described in the first embodiment, their description will be omitted.

First, in step S300, the user instructs a shooting operation via the operating means 108. Subsequently, in step S600, the camera CPU 102 determines whether or not the first interchangeable lens is attached to the camera body 100. When the first interchangeable lens is attached to the camera body 100, the process proceeds to step S301 as in the first embodiment.

On the other hand, if a second interchangeable lens instead of the first interchangeable lens is attached to the camera body 100 in step S600, the process proceeds to step S601. In step S601, the camera CPU 102 determines whether or not the second drive mode is selected by the user. If the second drive mode is not selected, the process proceeds to step S602. In step S602, the camera CPU 102 sets the first drive mode. On the other hand, when the second drive mode is selected, the process proceeds to step S603. In step S603, the camera CPU 102 sets the second drive mode.

As described above, in the present embodiment, when the aperture control means 102b shoots using the first interchangeable lens, the diaphragm 201 is driven in the first drive mode in the first shooting mode, and the second shooting is performed. In the mode, the aperture 201 is driven in the second drive mode. Further, when the diaphragm control means 102b uses the second interchangeable lens for shooting, the diaphragm 201 is driven in the second drive mode in both the first drive mode and the second shooting mode.

According to this embodiment, the aperture 201 can be driven in the second drive mode regardless of whether the mechanical shutter 103 is used or not, depending on the type of the interchangeable lens 200 mounted on the camera body 100. With such control, the user can select the drive mode of the aperture 201 suitable for the characteristics of each interchangeable lens.

(Other embodiments)
The present invention supplies a program that realizes one or more functions of the above-described embodiment to a system or device via a network or storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by the processing to be performed. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

According to each embodiment, it is possible to provide a control device, an image pickup device, an image pickup system, a control method, and a program that can select a suitable aperture control based on an imaging condition.

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 modifications can be made within the scope of the gist thereof.

102 Camera CPU (control device)
102a Setting means 102b Aperture control means

Claims (12)

It is possible to set a first shooting mode in which a light-shielding means for blocking light flux incident on the imaging means is driven to perform shooting, and a second shooting mode in which shooting is performed using the electronic shutter function of the imaging means. Setting means and
It has an aperture control means for controlling the aperture means,
The aperture control means
A first drive mode in which the aperture means is driven so as to reach a target aperture value via a reference aperture value, and
During the exposure in which the imaging means is recording a still image, the driving of the aperture means is prohibited, and while the imaging means is not recording the still image, the target is not mediated by the reference aperture value. It has a second drive mode that drives the diaphragm means so as to have a diaphragm value.
When shooting with the same interchangeable lens
In the first shooting mode, the diaphragm means is driven in the first drive mode.
A control device comprising driving the diaphragm means in the second drive mode in the second shooting mode. The control device according to claim 1, wherein the reference diaphragm value is a diaphragm value in a state where the diaphragm means is driven to the open end. The control device according to claim 1 or 2, wherein the diaphragm control means can drive the diaphragm means in the first drive mode in the second photographing mode. The diaphragm control means drives the diaphragm means in the first drive mode when the interchangeable lens does not allow the diaphragm means to be driven in the second drive mode in the second photographing mode. The control device according to any one of claims 1 to 3, wherein the control device. In the second shooting mode, the aperture control means
During the exposure for recording a still image by the imaging means, the driving of the diaphragm means is prohibited, and when the imaging means is not exposed, the diaphragm means is driven at the first speed.
Any one of claims 1 to 4, wherein the diaphragm means is stopped or driven at a second speed during exposure for displaying a display moving image without recording a still image. The control device according to the section. It is possible to set a first shooting mode in which a light-shielding means for blocking light flux incident on the imaging means is driven to perform shooting, and a second shooting mode in which shooting is performed using the electronic shutter function of the imaging means. Setting means and
It has an aperture control means for controlling the aperture means,
The aperture control means
A first drive mode in which the aperture means is driven so as to reach a target aperture value via a reference aperture value, and
During the exposure in which the imaging means is recording a still image, the driving of the aperture means is prohibited, and while the imaging means is not recording the still image, the target is not mediated by the reference aperture value. It has a second drive mode that drives the diaphragm means so as to have a diaphragm value.
When shooting with the first interchangeable lens
In the first shooting mode, the diaphragm means is driven in the first drive mode.
In the second shooting mode, the diaphragm means is driven in the second drive mode.
When shooting is performed using the second interchangeable lens, the diaphragm means is driven in the second drive mode in both the first drive mode and the second shooting mode. Control device. An imaging device with a removable interchangeable lens
An imaging means having an electronic shutter function and
A shading means that blocks the light flux incident on the imaging means,
An imaging device comprising the control device according to any one of claims 1 to 6. Further having a communication means for communicating with the interchangeable lens,
The imaging device according to claim 7, wherein the diaphragm control means controls the diaphragm means via the communication means. An interchangeable lens having a lens and an aperture means capable of driving in a first drive direction from the open side to the small aperture side and a second drive direction from the small aperture side to the open side.
An imaging system comprising the imaging apparatus according to claim 7 or 8. A setting step for setting a first shooting mode in which a light-shielding means for blocking light flux incident on the imaging means is driven to perform shooting, or a second shooting mode in which shooting is performed using the electronic shutter function of the imaging means. When,
It has a control step for controlling the diaphragm means in the first drive mode or the second drive mode, and has.
The first drive mode is a mode in which the diaphragm means is driven so as to reach a target diaphragm value via a reference diaphragm value.
In the second drive mode, the driving of the aperture means is prohibited during the exposure in which the image pickup means is recording a still image, and the reference is made while the image pickup means is not recording the still image. In this mode, the aperture means is driven so as to reach the target aperture value without going through the aperture value.
When shooting with the same interchangeable lens in the control step,
In the first shooting mode, the diaphragm means is driven in the first drive mode.
A control method comprising driving the diaphragm means in the second drive mode in the second shooting mode. A setting step for setting a first shooting mode in which a light-shielding means for blocking light flux incident on the imaging means is driven to perform shooting, or a second shooting mode in which shooting is performed using the electronic shutter function of the imaging means. When,
It has a control step for controlling the diaphragm means in the first drive mode or the second drive mode, and has.
The first drive mode is a mode in which the diaphragm means is driven so as to reach a target diaphragm value via a reference diaphragm value.
In the second drive mode, the driving of the aperture means is prohibited during the exposure in which the image pickup means is recording a still image, and the reference is made while the image pickup means is not recording the still image. In this mode, the aperture means is driven so as to reach the target aperture value without going through the aperture value.
In the control step
When shooting with the first interchangeable lens
In the first shooting mode, the diaphragm means is driven in the first drive mode.
In the second shooting mode, the diaphragm means is driven in the second drive mode.
When shooting is performed using the second interchangeable lens, the diaphragm means is driven in the second drive mode in both the first drive mode and the second shooting mode. Control method. A program comprising causing a computer to execute the control method according to claim 10 or 11.

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