JP6032967B2 - IMAGING DEVICE, LENS DEVICE, AND IMAGING DEVICE CONTROL METHOD - Google Patents

Description

  The present invention relates to an imaging apparatus, a lens apparatus, and a control method for the imaging apparatus.

  There has been proposed an imaging apparatus having an autofocus (automatic focus adjustment, hereinafter referred to as “AF”) function for controlling the focus position of a lens to perform focusing. Patent Document 1 discloses an interchangeable lens type camera system that detects a focus state based on a focus evaluation value transmitted from a camera body in a lens unit, determines a size of a focus detection region, and delivers the focus detection area to the camera body. doing.

  Here, some lenses change the image magnification of the subject when the focus is adjusted. Due to the change in the image magnification, only the change in the size of the image on the imaging surface near the center of the screen, but the movement of the image position due to the change in the size of the image also occurs around the screen. In an interchangeable lens camera, image magnification may or may not occur depending on the lens used, and the amount of change in image magnification varies depending on the lens.

  In the distance measurement by the contrast method (hereinafter referred to as TVAF) based on the output signal of the image sensor, the distance can be measured using the contrast value in the distance measurement frame on the screen. When TVAF is performed using a lens having a change in image magnification, particularly using peripheral information on the screen, an image enters and exits the distance measurement frame, resulting in erroneous distance measurement. In addition, it is known that if the size of the distance measurement frame is excessively large, the distance measurement accuracy is lowered due to the distance conflict within the frame.

Japanese Patent Laid-Open No. 9-15486

  However, when the distance measurement area is always constant, when measuring with a lens with a change in image magnification, particularly when the position of the distance measurement frame is in the vicinity of the imaging surface, the image enters and exits due to the change in image magnification. As a result, the distance is measured incorrectly.

  An object of the present invention is to provide an imaging apparatus capable of performing accurate distance measurement even when distance measurement is performed based on a contrast value in a distance measurement frame in an imaging surface using a lens having a change in image magnification. To do.

An image pickup apparatus according to an embodiment of the present invention includes an image pickup element that picks up an image of a subject and outputs an image signal, an acquisition unit that acquires lens information from a lens apparatus including a focus lens, and focus detection from an output of the image pickup element. obtains a signal to be used for, performs focus detection based on the acquired the signal, and a control unit that performs a focusing control process by driving the focus lens based on said focus detection result, image corresponding to the image signal Display means for sequentially displaying. The lens information includes information about an image magnification change accompanying the driving of the focus lens, and when the image is sequentially displayed on the display unit, the control unit is based on the signal acquired from the acquisition region, It is determined whether the focal position of the lens device is within a predetermined focusing range. If the focal position of the lens device is not within the focusing range, the change in image magnification obtained from the lens device is determined. based on the information, to change the size or position of the front Quito resulting regions based on the direction of driving the focus lens, if the focal position of the lens device is in the range focus the focus, the lens information image magnification Even in the case where there is a change, the size and position of the acquisition area are not changed according to the direction in which the focus lens is driven .

  According to the imaging apparatus of the present invention, accurate ranging can be performed even when distance measurement is performed based on the contrast value in the distance measurement frame in the imaging surface using a lens having a change in image magnification.

It is a figure which shows the structural example of the imaging device of this embodiment. 10 is a flowchart illustrating an example of operation processing of the imaging apparatus according to the present embodiment. It is a figure which shows the example of the schematic of AF frame size.

  FIG. 1 is a diagram illustrating a configuration example of an imaging apparatus according to the present embodiment. FIG. 1 shows an interchangeable lens system (digital single-lens reflex camera system) in which lenses can be interchanged. The description of the configuration of FIG. 1 that is not directly related to the gist of the present invention is simplified or omitted. The interchangeable lens system shown in FIG. 1 includes an imaging device 100 and a lens unit 300. The imaging device 100 is a digital camera (electronic still camera). A recording medium 200 and a lens unit 300 are detachably attached to the imaging apparatus 100.

  The imaging apparatus 100 includes a shutter 12, an imaging element 14, an image processing circuit 20, an image display unit 29, a distance measurement control unit 42, a photometry control unit 46, a system control unit 50, and the like. The recording medium 200 includes a recording unit 202 and the like. The lens unit 300 is a lens device that includes a photographing lens 310, a diaphragm 312, a lens system control unit 350, and the like. The photographing lens 310 includes a focus lens for focus adjustment and a zoom lens for zooming. In the lens unit 300 of this embodiment, the image magnification of the subject changes by moving the focus lens in the optical axis direction. How much the focus lens is moved in the direction of the closest side or the infinite side and how the image magnification changes depends on the type of the lens unit. Information on such image magnification change is stored by the lens system control unit 350 as described later.

  The shutter 12 controls the exposure amount to the image sensor 14. The image sensor 14 converts an optical image of a subject into an electrical signal. The mirrors 130 and 132 guide the light beam incident on the photographing lens 310 of the lens unit 300 to the optical viewfinder 104 by a single lens reflex system. The mirror 130 may be either a quick return mirror or a half mirror.

  At the time of photographing, the light beam incident on the photographing lens 310 is imaged on the image sensor 14 as an optical image through the aperture 312, the lens mount 306, the lens mount 106 of the imaging device 100, the mirror 130, and the shutter 12. That is, the image sensor 14 images a subject and outputs an image signal. The A (Analog) / D (Degital) converter 16 A / D converts the image signal (analog signal) output from the image sensor 14 into a digital signal.

  The timing generation circuit 18 is controlled by the memory control circuit 22 and the system control unit 50, and supplies a clock signal and a control signal to the image sensor 14, the A / D converter 16, and the system control 50. The image processing circuit 20 (calculation means, detection means) performs predetermined pixel interpolation processing and color conversion processing on the data output from the A / D converter 16 or the memory control circuit 22.

  In addition, the image processing circuit 20 obtains a correlation shift amount and direction between frames using two consecutive images, and performs predetermined arithmetic processing using the captured image data as necessary. Further, the image processing circuit 20 calculates the luminance of the subject based on data obtained by A / D converting the electrical signal output from the image sensor 14 by the A / D converter 16.

  Based on the calculation result obtained by the image processing circuit 20, the system control unit 50 controls the shutter control unit 40 and the distance measurement control unit 42 to perform TTL (through-the-lens) AF (autofocus). Processing and AE (automatic exposure) processing are performed. The system control unit 50 performs AF processing using a contrast detection method (TVAF). Specifically, the system control unit 50 acquires the contrast value within the distance measurement frame of the image signal output from the image sensor 14. The system control unit 50 functions as a control unit that performs focus detection based on the acquired contrast value and drives the focus lens based on the focus detection result to perform focus control processing. That is, the area within the distance measurement frame is a contrast value acquisition area.

  The image processing circuit 20 performs predetermined arithmetic processing using the captured image data, and also performs TTL AWB (auto white balance) processing based on the obtained arithmetic result. In the present embodiment, since the imaging apparatus 100 is configured to include the distance measurement control unit 42 and the photometry control unit 46, the distance measurement control unit 42 and the photometry control unit 46 are used when the optical viewfinder 104 is used. Each of the AF process and AE process is performed using this.

  When the electronic viewfinder (EVF) is used, it is automatically switched by the control of the system control unit 50 so that each of the AF processing and AE processing using the image processing circuit 20 is performed.

  The memory control circuit 22 controls the A / D converter 16, the timing generation circuit 18, the image processing circuit 20, the image display memory 24, the D / A converter 26, the memory 30, and the compression / decompression circuit 32. The control signal of the timing generation circuit 18 is also input to the system control unit 50. Thereby, the system control unit 50 can know the timing of the imaging control.

  Data output from the A / D converter 16 is written into the image display memory 24 or the memory 30 via the image processing circuit 20 and the memory control circuit 22 or directly via the memory control circuit 22.

  The image display unit 29 is composed of, for example, a TFT LCD. TFTLCD is an abbreviation for Thin Film Transfer Liquid Crystal Display. The image display unit 29 sequentially displays images corresponding to the image signal of the subject imaged by the imaging device 100.

  The imaging apparatus 100 realizes an electronic viewfinder (hereinafter, EVF) function by sequentially displaying an image before photographing of a subject on an external monitor (not shown) via an image display unit 29 or an image output unit (not shown). doing. That is, the imaging apparatus 100 has a live view function that uses the image display unit 29 as an EVF.

  The memory 30 is a storage means for storing captured still images and moving images, and has a storage capacity sufficient to store a predetermined number of still images and a moving image for a predetermined time. The memory 30 can also be used as a work area for the system control unit 50.

  The compression / decompression circuit 32 is a circuit that compresses / decompresses image data by adaptive discrete cosine transform (ADCT) or the like. The compression / decompression circuit 32 reads image data stored in the memory 30, performs compression processing or decompression processing, and writes the processed image data to the memory 30.

  The shutter control unit 40 controls the shutter 12 in cooperation with the aperture control unit 340 that controls the aperture 312 of the lens unit 300 based on the photometry information from the photometry control unit 46. The distance measurement control unit 42 performs AF processing. When the light beam incident on the photographic lens 310 is incident on the distance measurement control unit 42 through the diaphragm 312, the lens mounts 306 and 106, the mirror 130, and the distance measurement sub mirror (not shown) by the single-lens reflex method, Measures the in-focus state of an image formed as an optical image.

  The photometry control unit 46 performs AE processing. The light beam incident on the photographic lens 310 is made incident on the photometry control unit 46 through a diaphragm 312, lens mounts 306 and 106, mirrors 130 and 132, and a photometric lens (not shown) by a single lens reflex method. Thereby, the photometry control unit 46 measures the exposure state of the image formed as an optical image.

  During live view display by EVF, the system control unit 50 performs the following control based on the calculation result obtained by calculating the image data captured by the image sensor 14 by the image processing circuit 20.

  The system control unit 50 performs exposure control and AF control using a video TTL system that controls the shutter control unit 40, the aperture control unit 340, and the distance measurement control unit 342. The system control unit 50 may perform AF control using both the measurement result obtained by the distance measurement control unit 42 and the calculation result obtained by calculating the image data captured by the image sensor 14 by the image processing circuit 20.

  The display unit 54 performs display output / voice output of the operation state, messages, and the like as characters and images in accordance with the execution of the computer program by the system control unit 50. The display unit 54 is composed of, for example, a combination of an LCD, an LED, a sound generation element, and the like, and is installed in a single (or a plurality) at a position near the operation unit of the imaging apparatus 100 that is easily visible. The display unit 54 has a part of its function installed in the optical viewfinder 104. Details of display contents are omitted.

  The shutter switch SW1 (62) is turned on during the operation of a shutter button (not shown). Thereby, the start of operations such as AF processing, AE processing, AWB processing, and EF processing is instructed.

  The shutter switch SW2 (64) is turned on when the operation of the shutter button is completed. As a result, an operation start of a series of processing (exposure processing, development processing, recording processing) is instructed. In the exposure process, the system control unit 50 writes the signal read from the image sensor 14 as image data in the memory 30 via the A / D converter 16 and the memory control circuit 22. In the development process, the system control unit 50 performs the calculation using the image processing circuit 20 and the memory control circuit 22. In the recording process, the system control unit 50 reads the image data from the memory 30, compresses it with the compression / decompression circuit 32, and writes it to the recording medium 200.

  The operation unit 70 includes a menu button, a set button, an up / down / left / right input button, a quick review ON / OFF switch, a compression mode switch, a playback switch, an AF mode setting switch, and the like. Details of the operation unit 70 are omitted.

  The interface unit 90 manages an interface between the imaging device 100 and the recording medium 200. The connector 92 is connected to the connector 206 of the recording medium 200 and electrically connects the imaging device 100 to the recording medium 200. Details of the interface unit 90 and the connector 92 are omitted.

  The optical viewfinder 104 guides the light beam incident on the photographing lens 310 through the diaphragm 312, the lens mounts 306 and 106, and the mirrors 130 and 132 by the single-lens reflex method, and forms and displays it as an optical image. Thereby, it is possible to perform photographing using only the optical viewfinder 104 without using the EVF function of the image display unit 29.

  Also, some functions of the display unit 54 (for example, focus display, camera shake warning display, flash charge display, shutter speed display, aperture value display, exposure correction display, etc.) are installed in the optical viewfinder 104. .

  The interface unit 120 connects the imaging device 100 to the lens unit 300 in the lens mount 106. The connector 122 is connected to the connector 322 of the lens unit 300, and electrically connects the imaging device 100 to the lens unit 300.

  Whether or not the lens unit 300 is attached to the lens mount 106 and / or the connector 122 of the imaging apparatus 100 is detected by a detection unit (not shown). Details of the connector 122 are omitted.

  The recording medium 200 is composed of, for example, a memory card or a hard disk. The recording medium 200 includes a recording unit 202 composed of a semiconductor memory or a magnetic disk, an interface unit 204 that manages an interface with the imaging apparatus 100, and a connector 206 that connects to the imaging apparatus 100.

  The lens unit 300 is an interchangeable lens type. The lens unit 300 includes a photographing lens 310, an aperture 312, a lens mount 306, an interface unit 320, a connector 322, an aperture control unit 340, a distance measurement control unit 342, a lens system control unit 350, and the like.

  The diaphragm 312 adjusts the amount of light with respect to the imaging element 14 of the imaging apparatus 100. The lens mount 306 mechanically couples the lens unit 300 to the imaging device 100 and includes various functions for electrically connecting the lens unit 300 to the imaging device 100. The interface unit 320 connects the lens unit 300 to the imaging device 100 in the lens mount 306. The connector 322 electrically connects the lens unit 300 to the imaging device 100. Details of the connector 322 are omitted.

  The aperture control unit 340 controls the aperture 312 in cooperation with the shutter control unit 40 based on the photometric information from the photometry control unit 46 or the calculation result obtained by calculating the image data captured by the image sensor 14 by the image processing circuit 20. To do.

  The distance measurement control unit 342 controls focusing of the photographing lens 310. The lens switch 74 is a switch for switching whether to perform focusing control of the distance measurement control unit 342 (auto focus operation is performed) or not (manual focus operation is performed).

  The lens system control unit 350 controls the entire lens unit 300. The lens system control unit 350 stores operation constants, variables, programs, and the like. In addition, the lens system control unit 350 includes identification information such as a lens unit-specific number, management information, open aperture value, minimum aperture value, focal length, presence / absence of image magnification change and its amount, function information such as current and past Information such as each set value is stored. When the lens unit 300 is electrically connected to the imaging apparatus 100, the lens system control unit 350 transmits these pieces of information as lens information to the system control unit 50 as appropriate together with the state of the lens switch 74. The system control unit 50 changes the size or position of the distance measurement frame based on the received lens information. The lens system control unit 350 receives from the system control unit 50 a drive signal corresponding to the focus detection result based on the changed contrast value in the distance measurement frame. Then, the lens system control unit 350 performs a focusing operation (focusing control) based on the received drive signal.

  FIG. 2 is a flowchart illustrating an example of operation processing of the imaging apparatus according to the present embodiment. This operation process is realized by the system control unit 50 executing a computer program stored in a predetermined storage unit. The TVAF during live view display will be described below with reference to FIG.

  First, live view display is started by a user operation (step S301). Subsequently, the system control unit 50 determines whether the lens switch 74 of the lens unit 300 attached to the imaging apparatus 100 is MF or AF (step S302). MF indicates that the lens switch 74 has switched the focusing of the photographing lens 310 to the Manual Focus (MF) operation. AF indicates that the lens switch 74 has switched the focusing of the photographing lens 310 to an AutoFocus (AF) operation.

  When the lens switch is MF, the system control unit 50 sets the distance measurement frame size for MF (step S309), and the process proceeds to step S310. When the lens switch 74 is AF, the system control unit 50 checks the information on the image magnification change of the lens unit 300 included in the lens information notified from the lens system control unit 350 (step S303).

  Next, the system control unit 50 determines whether the lens unit 300 has an image magnification change (step S304). If there is no change in image magnification in the lens unit 300, the system control unit 50 sets a predetermined distance measurement frame size (step S305). The distance measurement frame during the AF operation is hereinafter referred to as an AF frame.

  If there is a change in the image magnification of the lens unit 300, it is determined whether the distance measurement position is the peripheral area or the central area of the imaging surface (step S306). Here, the central area is preset near the center of the imaging surface, and the area outside the central area is defined as the peripheral area. This determination process is performed because there is a high possibility that the subject is out of the AF frame due to a change in image magnification when the distance measurement position is in the peripheral region. The distance measurement position may be set automatically by the system control unit 50 or may be set by the user. When the user sets, the distance measurement position can be set by an up / down / left / right direction input button included in the operation unit 70 or a touch panel method. If the system control unit 50 determines that the distance measurement position is not in the peripheral area (in the central area), the process proceeds to step S305.

On the other hand, when the system control unit 50 determines that the distance measurement position is in the peripheral region, the system control unit 50 determines whether the focal position of the lens unit 300 is within a predetermined focusing range (step S307). ). This determination process is performed for the following reason. When the focal position of the lens unit 300 is within the in-focus range, when driving the lens with TVAF, the amount of driving is small, so that there is almost no change in image magnification, so there is no need to change the AF frame size. However, when the focal position of the lens unit 300 is outside the in-focus range, it is necessary to perform lens driving (search operation) for searching for a subject, and the driving amount of the lens increases. Therefore, when the focal position of the lens unit 300 is outside the in-focus range, it is necessary to change the size and position of the AF frame in consideration of the change in the image magnification of the lens.

  If the system control unit 50 determines that the focal position of the lens unit 300 is within the predetermined focusing range, the process proceeds to step S305. When the system control unit 50 determines that the focal position of the lens unit 300 is not within the predetermined focusing range, the system control unit 50 executes the following processing. The system control unit 50 changes / sets the AF frame size based on the current position of the lens, the lens driving direction, the position of the AF frame, and the change in the image magnification of the lens unit 300 (step S308), and proceeds to step S310.

  The AF frame size changing / setting process in step S308 will be described below. The system control unit 50 enlarges and sets a predetermined AF frame according to the image magnification of the lens unit 300. More specifically, if the image magnification is 1.2 times, the system control unit 50 sets an AF frame that is 1.2 times larger than a predetermined AF frame size. The size change of the AF frame may be increased in proportion to the image magnification, and may not be an integer multiple of the image magnification.

  The system control unit 50 may determine the position of the AF frame on the imaging surface of the subject, and change the size / position of the AF frame based on the determined position of the AF frame. For example, when the system control unit 50 determines that the AF frame is near the center of the imaging surface of the subject, the system control unit 50 changes the size of the AF frame. If the system control unit 50 determines that the AF frame is near the periphery of the imaging surface of the subject, the system control unit 50 changes the size or position of the AF frame.

  A process of changing the size or position of the AF frame when it is determined that the AF frame is near the periphery of the imaging surface of the subject will be described. The system control unit 50 determines whether the driving direction of the lens included in the lens unit 300 is performed in a direction in which the image magnification increases or decreases.

  When the lens is driven in a direction in which the change in image magnification increases, the image moves outward and the image becomes larger as the lens is driven. Therefore, in this case, the system control unit 50 widens the AF frame or moves the position of the AF frame in the direction in which the image height increases. When driving the lens in a direction in which the change in image magnification decreases, the image moves inward and the image becomes smaller as the lens is driven. In this case, the system control unit 50 enlarges the size of the AF frame or moves the AF position in the direction in which the image height decreases. With the above processing, distance measurement can be performed with high accuracy even when the AF frame is in the vicinity of the periphery of the imaging surface.

  FIG. 3 is a diagram illustrating an example of a schematic diagram of the AF frame size. FIG. 3A shows a predetermined AF frame 100. FIG. 3B shows the AF frame 101 when a lens having a change in image magnification is mounted and the image magnification is increased in the driving direction of the lens. FIG. 3C is an example of the distance measurement frame 102 set during the MF operation. As shown in FIG. 3B, the AF frame 101 set when the lens drive direction increases the image magnification is higher in image height than the AF frame 100 shown in FIG. Big.

  Returning to FIG. 2, the system control unit 50 checks SW1 (step S310). If the shutter switch 62 has been operated as a result of checking SW1, the process proceeds to step S312. Then, the system control unit 50 performs photometry (step S312). Further, the system control unit 50 performs distance measurement (step S313), and proceeds to step S314.

  Next, the system control unit 50 checks SW2 (step S314). As a result of checking SW2, if the shutter switch 64 is OFF, the process returns to step S310. If the shutter switch 64 is on, the live view is terminated in order to perform still image shooting (step S315).

  If it is determined in step S310 that the shutter switch 62 has not been operated, the process proceeds to step S311. Then, the system control unit 50 checks whether an operation for ending the live view by the operation of the operation unit 70, specifically, a switch operation such as menu display or playback display has been performed (step S311). When the system control unit 50 determines that the operation for ending the live view is not performed by the operation of the operation unit 70, the process returns to step S302. When the system control unit 50 determines that an operation for ending the live view is performed by the operation of the operation unit 70, the system control unit 50 ends the live view (step S315).

  In the present embodiment, it has been described that when a lens having a change in image magnification is attached, the display is also changed when the size of the AF frame is changed. That is, the system control unit 50 instructs the image display unit 29 to display information indicating the changed AF frame together with the image. However, in another embodiment, the system control unit 50 instructs not to display the changed AF frame together with the image, and only uses the changed AF frame for AF processing based on the contrast value in the AF. Also good. Further, in order to acquire the TVAF evaluation value, it is necessary to set the position and size of the AF frame before accumulating the sensor. Therefore, the system control unit 50 may perform the confirmation process for the change in the image magnification of the lens by using the pre-sensor accumulation process.

(Other examples)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed. In this case, the program and the storage medium storing the program constitute the present invention.

50 System Control Unit 100 Imaging Device 300 Lens Unit

Claims (11)

An image sensor that images a subject and outputs an image signal;
Acquisition means for acquiring lens information from a lens apparatus equipped with a focus lens;
Obtains a signal used for focus detection from the output of the image pickup device performs focus detection based on the acquired the signal, and a control means for driving the focus lens based on said focus detection result performs a focusing control process ,
Display means for sequentially displaying images corresponding to the image signal,
The lens information includes information about an image magnification change accompanying driving of the focus lens,
When sequentially displaying the image on the display unit, the control unit determines whether the focal position of the lens device is within a predetermined focusing range based on the signal acquired from the acquisition region. ,
If not in the range focus focal position the case of the lens apparatus, based on information about the magnification change obtained from the lens unit, the size of the pre Quito resulting regions based on the direction of driving the focus lens Or change the position ,
If the focal position of the lens device is within the in-focus range, the size of the acquisition region and the size of the acquisition region are determined according to the direction in which the focus lens is driven, even if the lens information indicates that there is a change in image magnification. An imaging apparatus characterized by not changing a position . Wherein when indicating that the lens data is at Zobai rate change, depending on the position of the front Quito obtained area on the imaging plane of the object, processing of changing the size or position of the front Quito obtained area The imaging apparatus according to claim 1 , wherein: Wherein, near the periphery der Ru if the imaging plane position before Symbol acquisition region the object changes the size or position of the acquisition area in accordance with the direction of driving the focus lens, the acquisition 3. The imaging apparatus according to claim 2 , wherein when the position of the area is near the center of the imaging surface of the subject, the size and position of the acquisition area are not changed according to a direction in which the focus lens is driven. . The control means, the acquisition area is a near vicinity near Ru case of the imaging surface, when the driving direction of the focus lens is a direction in which the magnification increases, the size of the acquisition area The imaging apparatus according to claim 3, wherein the image is enlarged in a direction in which the image height of the subject increases. The control means, the acquisition area is a near vicinity near Ru case of the imaging surface, when the driving direction of the focus lens is a direction in which the magnification decreases, the size of the acquisition area the imaging apparatus according to claim 3 or claim 4, characterized in that expanding in the direction in which the image height of the subject is low. The acquisition area is set automatically by the control means or according to a user operation,
The control means changes the size or position of the acquisition area according to the direction in which the focus lens is driven when the set position of the acquisition area is in the vicinity of the periphery of the imaging surface of the subject. The imaging device according to any one of claims 3 to 5. 7. The control unit according to claim 1, wherein when the lens information indicates that there is no change in image magnification, the size and position of the acquisition region are not changed according to a direction in which the focus lens is driven. The imaging device according to any one of the above. The imaging apparatus according to claim 1, wherein the control unit instructs the display unit to display information indicating the acquisition area together with an image corresponding to the image signal. . The imaging device according to claim 1, wherein the control unit instructs the display unit not to display information indicating the changed acquisition area. It is attached to the imaging device according to any one of claims 1 to 9,
The focus lens;
Before SL imaging apparatus, the lens apparatus characterized by a transmission unit that transmits the lens information including the information about the image magnification change caused by driving of the focus lens. A method for controlling an imaging apparatus including an imaging device that images a subject and outputs an image signal,
An information acquisition step of acquiring lens information from a lens device equipped with a focus lens;
An acquisition step of acquiring a signal used for focus detection from an output of the image sensor ;
A row Cormorant focus detection step the focus detection based on the acquired the signal,
And a control step of performing focus control process by driving the focus lens based on said focus detection result,
A display step of sequentially displaying images corresponding to the image signal,
The lens information includes information about an image magnification change accompanying driving of the focus lens,
When sequentially displaying the images in the display step, the control step determines whether the focal position of the lens device is within a predetermined focusing range based on the signal acquired from the acquisition region. ,
If the focal position of the lens device is not within the in-focus range, the size or position of the acquisition area according to the direction in which the focus lens is driven based on the information about the change in image magnification acquired from the lens device. change the,
If the focal position of the lens device is within the in-focus range, the size of the acquisition region and the size of the acquisition region are determined according to the direction in which the focus lens is driven, even if the lens information indicates that there is a change in image magnification. A method for controlling an imaging apparatus, wherein the position is not changed .

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