JP6089972B2 - Imaging device - Google Patents

Description

  The present invention relates to an imaging device including an autofocus device.

In recent years, an imaging apparatus is provided with an autofocus (AF) apparatus. As an AF method of this AF apparatus, a phase difference focus detection method and a contrast detection method are known.
Here, in the phase difference focus detection method, when the subject has a periodic pattern, a false focus phenomenon may occur in which the subject is in focus other than the correct focus position.
In view of this, a configuration has been proposed that includes both a phase difference focus detection method and a contrast detection method to avoid a false focus phenomenon (see, for example, Patent Document 1).

JP 2006-301150 A

  However, a general single-lens reflex camera that guides the light beam from the optical system to the optical viewfinder with a mirror cannot perform focus detection at the same time even if both a phase difference focus detection method and a contrast detection method are provided. Therefore, there is a problem that the detection result of the contrast detection method cannot be used to avoid the false focusing phenomenon by the phase difference focus detection method.

  The subject of this invention is providing the imaging device which can reduce false focusing.

The present invention solves the above problems by the following means.
According to the first aspect of the present invention, a focus detection unit that detects a focus state of a subject image via an imaging optical system including a focusing lens by a phase difference method, and a focus based on a detection result of the focus detection unit. A focus detection value calculation unit that calculates a detection value, a focus adjustment control unit that performs focus adjustment control of the focusing lens based on the focus detection value, and a finder imaging unit that captures an optical viewfinder image of the subject image From the detection result of the focus detection unit, the first determination unit that determines whether or not the subject may be a periodic subject, and the possibility that the subject is a periodic subject based on the imaging result of the finder imaging unit. A second determination unit that determines whether or not the focus adjustment control unit is in a case where the first determination unit determines that the subject is a periodic subject, and the second determination unit does not determine that the subject is a periodic subject. Different from the current first focus detection value To perform focus adjustment using the focus detection value, which is an imaging apparatus according to claim.
The invention according to claim 2 is the imaging apparatus according to claim 1, wherein the focus adjustment control unit determines that the first determination unit is a periodic subject and the second determination unit determines that the subject is a periodic subject. In this case, the imaging apparatus is characterized in that focus adjustment is performed using the first focus detection value.
The invention according to claim 3 is the imaging apparatus according to claim 1 or 2, wherein the focus adjustment control unit determines that the first determination unit is a periodic subject and the second determination unit is a periodic subject. If not, the imaging device is characterized in that the focusing lens is continuously driven in the direction in which the focusing lens is driven, and the different focus detection values are obtained.
The invention according to claim 4 is the imaging apparatus according to claim 1 or 2, wherein the focus adjustment control unit determines that the first determination unit is a periodic subject, and the second determination unit is a periodic subject. If the determination is not, the different focus detection values are obtained by changing the driving direction of the focusing lens according to the detection result of the second determination unit during the driving of the focusing lens. It is an imaging device.

  ADVANTAGE OF THE INVENTION According to this invention, the imaging device which can reduce false focusing can be provided.

It is the schematic of the camera which is one Embodiment of the imaging device in this invention. It is the figure which overlapped and illustrated the focus detection point on the periodic subject. It is a figure which shows the example of the image on a pair of vertical direction sensor (A row | line | column / B row | line) in the focus detection point shown in FIG. 3A and 3B show image information for photometry imaging at a focus detection point corresponding to FIG. 3, where FIG. 3A shows a focused state and FIG. 3B shows a false focused state. It is a flowchart of AF control including periodic subject control.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic diagram of a camera 1 which is an embodiment of an imaging apparatus according to the present invention. In the following explanatory diagrams, an XYZ orthogonal coordinate system is provided for ease of explanation and understanding. In this coordinate system, when the photographer shoots a horizontally long image with the optical axis OA being horizontal, the direction toward the left as viewed from the photographer at the position of the camera (hereinafter referred to as the positive position) is the X plus direction and the positive position. The direction toward the upper side is the Y plus direction, and the direction toward the subject at the normal position is the Z plus direction. In the following description, the Z plus direction toward the subject is also referred to as the front side, and the opposite Z minus side is also referred to as the back side.

The camera 1 is an interchangeable lens digital camera that includes a camera body 10 and an imaging lens 20 that can be attached to and detached from the camera body 10.
The camera body 10 is a so-called single-lens reflex camera, and includes a mirror unit 11, an imaging unit 12, a focus detection unit 13, an optical finder unit 14, a photometry unit 15, and a control unit 16. .

The mirror part 11 comprises what is called a quick return mirror by the main mirror 11M and the submirror 11S with which the rear surface was mounted | worn.
The main mirror 11M is provided so as to be able to oscillate between a working position interposed in the optical path of the image light from the imaging lens 20 and a non-working position that does not prevent the image light from entering the imaging unit 12. The main mirror 11M reflects image light toward an optical finder unit 14 described later at the operating position. Further, a part of the main mirror 11M is a half mirror, and transmits part of the image light at the operating position.
The sub mirror 11S is provided on the back side of the main mirror 11M so as to reflect the image light transmitted through the half mirror portion and to enter the focus detection unit 13 described later.

The imaging unit 12 includes a shutter 12A and an imaging element 12B.
The shutter 12A is opened and closed by a control signal from the control unit 16, and controls the exposure time of the image light to the image sensor 12B.
The image pickup device 12B is a CCD, a CMOS, or the like that converts an image formed by the taking lens 20 into an electric signal.

The focus detection unit 13 receives image light that is transmitted through the half mirror portion of the main mirror 11M at the operating position and reflected by the sub mirror 11S. The focus detection unit 13 acquires focus detection information of the subject image by a so-called phase difference detection method.
That is, for focus detection that reads out image information corresponding to each of a pair of defocus detection light beams divided by a separator lens (not shown) corresponding to each of a plurality of focus detection points (AF areas) set in the shooting screen. A sensor array is provided.
Each focus detection sensor array reads image information corresponding to a pair of defocus detection light flux images divided by the separator lens in the detection direction (X and Y directions in the case of a cross sensor). Then, based on the relative displacement amount between the two images (image information), a defocus amount calculation unit 16A in the control unit 16 described later performs a calculation for detecting the defocus amount.

The optical finder unit 14 includes a screen unit 14A, a pentaprism 14B, and an eyepiece lens 14C.
Although details are not shown in the screen portion 14A, a screen, a field frame, an AF area indicator display portion, and the like are arranged in multiple layers.

  On the screen portion 14A, the subject light reflected by the main mirror 11M forms an image on the screen. For the subject image formed on the screen, the field frame defines the outer shape of the shooting area, and the AF area index display unit places the AF area index in the shooting area at a position corresponding to the plurality of AF areas in the focus detection unit 13. Overlaid on the display.

  The optical finder unit 14 allows the user to observe the subject image formed on the screen in the screen unit 14A via the pentaprism 14B and the eyepiece 14C.

The photometric unit 15 includes a triangular prism 15A, a photometric lens 15B, and a photometric imaging unit 15C.
The triangular prism 15A is disposed on the exit side of the pentaprism 14B in the optical viewfinder section 14, and reflects the photometric image light toward the photometric lens 15B.
The photometric lens 14C re-images the photometric image light branched by the triangular prism 15A on the light receiving surface of the photometric imaging unit 15C.

As the photometric imaging unit 15C, for example, a CCD sensor of about QVGA (320 × 240 pixels) in which photoelectric conversion pixels of RGB colors are Bayer arranged is used. The subject image formed on the screen portion 14A of the optical viewfinder 14 is re-imaged by the photometry lens 14C on the light receiving screen of the photometry imaging section 15C. It is possible to perform photometry for each block obtained by dividing the light receiving screen into a plurality of blocks from the photometric image captured by the photometric imaging unit 15C. Further, the photometric image captured by the photometric imaging unit 15C is used not only for detecting the brightness of the subject but also for determining a periodic subject described later in the control unit 16.
The photometric imaging unit 15 </ b> C is connected to the control unit 16 in the camera body 10, and outputs imaging information (photometric imaged image) to the control unit 16.

  The control unit 16 includes a CPU and the like, and controls each operation unit of the camera body 10. In addition, the control unit 16 exchanges information with a lens control unit 22 of the imaging lens 20 described later, and controls each operation unit including an AF driving mechanism 21 described later of the imaging lens 20. That is, the control unit 16 controls the operation of the entire camera 1 including the imaging lens 20.

Here, the control unit 16 includes a defocus amount calculation unit 16A, a focus adjustment control unit 16B, a first determination unit 16C, and a second determination unit 16D as functional units related to AF control. Based on the defocus amount calculated by the focus amount calculation unit 16A, the driving amount of the focusing lens is calculated and a lens driving signal is sent to the AF driving mechanism 21 of the imaging lens 20 to adjust the focus (AF control). I do.
Based on the detection information input from the focus detection unit 13, the defocus amount calculation unit 16A performs focus detection calculation by a known phase difference method, and calculates the defocus amount.

  The focus adjustment control unit 16B calculates the driving amount of the focusing lens based on the defocus amount calculated by the defocus amount calculation unit 16A and sends a lens driving signal to the AF driving mechanism 21 of the imaging lens 20. .

  16 C of 1st determination parts determine whether it is a periodic subject from the information of the focus detection calculation by 16 A of defocus amount calculation parts. That is, if a position with a high correlation appears periodically as a result of the correlation calculation for obtaining the positional deviation amount of the image of the pair of focus detection sensor arrays, it is determined as a periodic subject. Further, the period of the periodic subject on the imaging surface is detected from this period and the pixel pitch corresponding to the imaging surface of the focus detection sensor array in the focus detection unit 13. Also, the direction in which the periodic subject is detected is calculated.

The second determination unit 16D determines the periodic subject using the photometric image captured by the photometric image capturing unit 15C in the photometric unit 15. In other words, the periodic subject detection from the photometric image by the photometric imaging unit 15C is performed by extracting an image at a position and direction corresponding to the focus detection sensor array from the photometric image and taking the autocorrelation of the extracted image. .
That is, the clipped image is shifted by one pitch and the absolute value sum or product of the difference from the original image is added to the detection range, and the correlation is high (the value is small in the absolute value of the difference, It is determined whether the shift position appears periodically. Here, if a shift position with high correlation is detected periodically, it can be said that the subject is a periodic subject.

Then, the control unit 16 calculates the driving amount of the focusing lens based on the defocus amount calculated by the defocus amount calculation unit 16A and sends a lens driving signal to the AF driving mechanism 21 of the imaging lens 20. Then, focusing adjustment (AF control) is performed, and periodic subject control for suppressing the false focusing phenomenon is performed based on the detection result by the first determination unit 16C and the determination result by the second determination unit 16D.
That is, the control unit 16 performs AF control using the focus detection information from the focus detection unit 13, and uses the photometry information from the photometry unit 15 for subject luminance information for exposure control and periodic subject control. Note that the periodic subject control accompanying the AF control will be described in detail later.

Although detailed description is omitted, the imaging lens 20 includes a plurality of lenses L constituting an imaging optical system including a focusing lens, an AF driving mechanism 21 that drives the focusing lens, and a lens control unit 22. I have.
The lens control unit 22 includes a CPU and the like, and operates each operation unit in the imaging lens 20 including the AF drive mechanism 21 under the control of the control unit 16 in the camera body 10 to which the imaging lens 20 is attached. Control.

  When a release button (not shown) is pressed, the camera 1 having the above-described configuration is controlled by the control unit 16 to retract the mirror unit 11, then opens the shutter 12 </ b> A for a predetermined time, and is imaged by the imaging lens 20. The image sensor 12B converts the subject image light into an electrical signal, and the image data is recorded (that is, photographed) on a recording medium (not shown) provided in the camera body 10.

  At the time of shooting, the control unit 16 drives the AF driving mechanism 21 of the imaging lens 20 to perform focusing adjustment (AF control) and performs periodic subject control for suppressing the false focusing phenomenon. Exposure time is set (exposure control) by performing photometric control and photometric calculation.

Next, referring to FIGS. 2 to 5 in addition to FIG. 1 described above, the periodic subject control accompanying the AF control by the control unit 16 will be described in detail.
FIG. 2 is a diagram illustrating an example in which a focus detection point (AF area 31) is superimposed on a periodic subject. FIG. 3 shows an example of an image on the pair of vertical sensors 13S (A row / B row) at the focus detection point (AF area 31) shown in FIG. 4A and 4B show image information of images taken by the photometry imaging unit 15C of the photometry unit 15 at the focus detection point (AF area 31) corresponding to FIG. 3, where FIG. 4A is a focused state, and FIG. 4B is a false focus. Indicates the state. FIG. 5 is a flowchart of AF control including periodic subject control.

First, focus detection information for the periodic subject by the focus detection unit 13 and an imaging pattern by the photometry imaging unit 15C of the photometry unit 15 will be described.
For example, as shown in FIG. 2, consider a case where focusing control is performed on a horizontal blind 41 installed in a window 40 at a focus detection point (AF area 31).

  A horizontal blind 41 provided in the window 40 as shown in FIG. 2 has a periodic pattern in the vertical direction. If this is detected in the AF area 31 by a pair of vertical sensors (herein referred to as A row and B row) in the focus detection unit 13, as shown in FIG. Detected.

  Based on such an image, a focus detection value (defocus amount) is obtained by a known defocus calculation by the defocus amount calculation unit 16A. A positional shift amount is calculated by correlation calculation of the images of the A and B columns, and this is information corresponding to the focus detection value. However, in the case of a periodic subject as shown in FIG. 2, a plurality of deviation amounts that increase the correlation are periodically obtained. If the correct amount of misalignment is used, correct focus information is obtained, and if a misalignment amount having a large correlation other than the correct amount of misalignment is used, false focus information is obtained. However, the correct focus information and the false focus information both show similar behavior of the image of the focus detection unit, and it is difficult to distinguish them.

  On the other hand, when the photometric image captured by the photometric imaging unit 15C of the photometric unit 15 is cut out at a position and a detection direction corresponding to the focus detection point (AF area 31) by the focus detection unit 13, FIG. As shown. That is, the photometric image captured by the photometric imaging unit 15C is once focused on the diffusion surface of the screen unit 14A of the optical viewfinder unit 14, and therefore is in focus (the subject image is formed at the original focal position). When the image is captured), a periodic subject image is observed as shown in (a), and when it is falsely focused, it is out of focus. The image of a typical subject is not clearly observed. Therefore, by observing the photometric image captured by the photometric imaging unit 15C, it is possible to distinguish between a case where the focus is correct and a case where the focus is false.

  The second determination unit 16D refers to the region corresponding to the focus detection point (AF area 31) by the focus detection unit 13 in the photometric image captured by the photometry image capturing unit 15C of the photometry unit 15 as described above, thereby making the periodic subject Determine.

Then, the periodic subject control by the control unit 16 detects the periodic subject by the first determination unit 16C based on the detection result by the focus detection unit 13, and if it is detected as a periodic subject here, then the photometry unit 15 A periodic subject is determined by the second determination unit 16D based on the photometric image. The second determination unit 16D also determines that the subject is a periodic subject, and if both have substantially the same period, it is determined that the focus detection value at that time is correct and in focus.
On the other hand, when the second determination unit 16D cannot determine the subject detected as the periodic subject by the first determination unit 16C, the focus detection value at that time is incorrect and the subject is falsely focused. The focus detection value is changed, and the focusing operation (lens driving / focus adjustment) is performed again.

Next, AF control including periodic subject control by the control unit 16 will be described with reference to the flowchart shown in FIG. In addition, the code | symbol of the component in the following description should refer to FIG. In FIG. 5 and the following description, “step” is also abbreviated as “S”.
The AF control is started (AF control activation) by an autofocus activation instruction by half-pressing the release switch of the camera 1 or the like.

In the AF control, first, sensor exposure (S01) of the focus detection unit 13 and exposure (S02) of the photometric imaging unit are performed.
Either step 01 or step 02 may be performed first. Further, the exposure may be performed asynchronously. However, if the focus detection cycle and the photometry cycle are not fast enough asynchronously, it is necessary to take into account the difference in timing. For example, the exposure time is stored using the counter of the control unit 16. What is necessary is just to comprise so that the information from which the time has shifted | deviated more than predetermined amount may not be referred mutually.

Next, based on the detection result by the focus detection unit 13, the defocus amount calculation unit 16A performs focus detection calculation by a known phase difference method (S03).
As described above, the focus detection unit 13 is equipped with a focus detection sensor array corresponding to each of the plurality of focus detection areas. Here, the photographer selects or the camera 1 (control unit 16). In the focus detection area that is automatically selected, focus detection is performed in the vertical and horizontal directions.

Then, based on the focus detection calculation result (defocus amount) in step 03, it is determined whether or not the position of the focus lens is near the focus (S04).
Here, the vicinity of the in-focus point means that the defocus amount is within a predetermined (predetermined) target value. This step 04 is not essential and can be omitted.

If it is determined in step 04 that there is no in-focus lens in the vicinity of the focal point (No), the lens drive / focus adjustment in step 10 is entered. In step 10, based on the focus detection calculation result (defocus amount) in step 03, the focus adjustment control unit 16B performs lens driving and focus adjustment.
On the other hand, if it is determined in step 04 that the object is in the vicinity of the focal point (Yes), the first determination unit 16C then determines whether the subject is a periodic subject (S05).

  In step 05, the determination of the periodic subject by the first determination unit 16C determines whether the subject is a periodic subject from the information of the focus detection calculation by the defocus amount calculation unit 16A based on the detection result by the focus detection unit 13. Here, when a position with high correlation periodically appears as a result of the correlation calculation for obtaining the positional deviation amount of the image of the pair of focus detection sensor arrays, it is determined as a periodic subject. Also, the period of the periodic subject on the imaging surface is detected from this period and the pixel pitch corresponding to the imaging surface of the focus detection sensor array. Also, the direction in which the periodic subject is detected is calculated.

If it is determined in step 05 that the subject is not a periodic subject (No), the process jumps to step 10 to perform lens drive / focus adjustment by the focus adjustment control unit 16B (continue lens drive / focus adjustment at the time of determination in step 04). ).
On the other hand, if it is determined in step 05 that the subject is a periodic subject (Yes), the second determining unit 16D performs periodic subject detection from the photometric image captured by the photometric imaging unit 15C in the photometric unit 15 (S06).

  The periodic subject detection by the second determination unit 16D in step 06 is performed as follows using an image cut out at the position and detection direction corresponding to the AF area 31 on which the focus detection calculation was performed in step 03. If an area display as shown in FIG. 2 is reflected at the position of the photometric image, an image obtained by cutting out the areas near the top, bottom, left, and right avoiding the area display reflection area is used.

  The periodic subject detection from the photometric image is performed by autocorrelation of the extracted photometric image. That is, the clipped image is shifted by one pitch and the absolute value sum or product of the difference from the original image is added to the detection range, and the correlation is high (the value is small in the absolute value of the difference, It is determined whether the shift position appears periodically. Here, if a shift position with high correlation is detected periodically, it can be said that the subject is a periodic subject.

Here, when a periodic subject is detected (a shift position with high correlation is periodically detected), the imaging surface is calculated from the sensor pixel pitch of the photometry imaging unit 15C and the projection magnification of the photometry re-imaging lens. Calculate the period above. Therefore, the calculated period is compared with the period of the periodic subject (detected by the first determination unit 16C based on the detection information of the focus detection unit 13) detected in the above-described step 05, and both are compared. If substantially the same, it can be determined that the periodic subject is correctly focused with sufficient reliability. However, when the sensor pixel pitch of the photometry imaging unit 15C is coarse with respect to the period of the subject image, a frequency lower than the original frequency may be observed due to the moire phenomenon. In this case, the reliability may be slightly inferior, but the focus may be correct.
On the other hand, if no periodic subject is detected from the photometric image (a position with a high correlation is not periodically detected), there is a high possibility that the subject is falsely focused.

Then, a periodic subject is detected by the second determination unit 16D, and it is determined whether the cycle is equivalent to the cycle of the periodic subject detected by the first determination unit 16C (S07).
If it is determined in step 07 that the periodic subject has not been detected (No), feedback is performed in the focus detection calculation so as to select a highly correlated shift amount different from the focus detection value currently employed. (S08).
On the other hand, if it is determined in step 07 that the periodic subject has been detected (Yes), it is determined that there is a high possibility that the subject is correctly focused, and the focus detection value currently used is used for focus. The adjustment is continued (S09).

Thereafter, focus adjustment is performed by driving the lens (S10), and in-focus (defocus amount = 0) is determined (S11).
If it is determined in step 11 that the subject is in focus, a determination according to the AF mode is made in step 12, and in the single mode (indicated by S in the figure), the AF control is terminated, and the continuous mode (in FIG. In the case of (shown), the process returns to step 01, and the AF control is repeated while the autofocus activation factor such as half-press of the release switch is ON.

  According to the periodic subject control accompanying the AF control by the control unit 16 as described above, it is possible to prevent the subject having a periodic pattern from being falsely focused and to focus correctly.

It should be noted that selection of a shift amount having a high correlation different from the focus detection value employed in step 08 may be performed as follows.
For example, a shift position with high correlation that is on the front side in the driving direction of the focusing lens toward the target focus detection value (defocus amount) is set as a new focus detection value (defocus amount). Thereby, it is possible to rationally search for the in-focus position rather than randomly setting a new focus detection value.

In addition, during the driving of the focusing lens toward the target focus detection value (defocus amount), the second determination unit 16D continues to detect the periodic subject from the photometric image captured by the photometric image capturing unit 15C in the photometric unit 15. To do.
If there is a peak in which a highly correlated shift position is periodically detected during driving of the focusing lens, the vicinity of that position is set as a new focus detection value (defocus amount), and the drive direction is switched. An AF operation is performed. On the other hand, when there is no peak, a new focus detection value is set on the front side without changing the driving direction of the focusing lens as described above. This also enables rational and quick focusing.

As described above, this embodiment has the following effects.
(1) In the camera 1, the control unit 16 is determined as a periodic subject based on the detection result of the focus detection unit 13, is determined as a periodic subject based on a photometric image captured by the photometry unit 15, and the period of both is determined. If substantially the same, it is determined that the focus detection value at that time is correct and in focus. On the other hand, when a photometric image captured by the photometry unit 15 cannot be determined as a periodic subject for a subject that is a periodic subject based on the detection result of the focus detection unit 13, the focus detection value at that time is not correct and is false. It is determined that the subject is in focus, the focus detection value is changed, and the focusing operation (lens driving / focus adjustment) is performed again. Thereby, it is possible to correctly focus the subject having the periodic pattern while preventing false focusing.

(2) Since the photometric image taken by the photometry unit 15 is used as the determination information of the periodic subject, even in a general single-lens reflex type camera that guides the light beam from the optical system to the optical viewfinder with a quick return mirror, Occurrence can be suppressed.

(Deformation)
The present invention is not limited to the above-described embodiment, and various modifications and changes as described below are possible, and these are also within the scope of the present invention.
(1) In the above-described embodiment, the present invention is applied to a lens interchangeable single-lens reflex digital camera. However, the present invention is not limited to this, and may be applied to a so-called silver salt camera or a lens-fixed camera using a film.

  In addition, although embodiment and a deformation | transformation form can also be used in combination as appropriate, detailed description is abbreviate | omitted. Further, the present invention is not limited to the embodiment described above.

  1: camera, 10: camera body, 12: imaging unit, 13: focus detection unit, 14: optical finder unit, 15: photometry unit, 15C: imaging unit for photometry, 16: control unit, 16B: focus adjustment control unit, 16C: 1st determination part, 16D: 2nd determination part, 20: Imaging lens

Claims (4)

A focus detection unit that detects a focused state of a subject image via an imaging optical system including a focusing lens by a phase difference method;
A focus detection value calculation unit that calculates a focus detection value based on a detection result of the focus detection unit;
A focus adjustment control unit that performs focus adjustment control of the focusing lens based on the focus detection value;
A finder imaging unit for imaging an optical finder image of the subject image;
A first determination unit that determines whether the subject is a periodic subject from the detection result of the focus detection unit;
A second determination unit that determines whether or not the subject is a periodic subject based on an imaging result of the finder imaging unit;
The focus adjustment control unit determines a focus detection value different from the current first focus detection value when the first determination unit determines that the subject is a periodic subject and the second determination unit does not determine that the subject is a periodic subject. Using to focus,
An imaging apparatus characterized by the above. The imaging apparatus according to claim 1,
The focus adjustment control unit performs focus adjustment using the first focus detection value when the first determination unit determines that the subject is a periodic subject and the second determination unit determines that the subject is a periodic subject;
An imaging apparatus characterized by the above. The imaging apparatus according to claim 1, wherein:
The focus adjustment control unit
When the first determination unit determines that the subject is a periodic subject and the second determination unit does not determine that the subject is a periodic subject,
Continuing to drive the focusing lens in the direction of driving the focusing lens, and obtaining the different focus detection values;
An imaging apparatus characterized by the above. The imaging apparatus according to claim 1, wherein:
The focus adjustment control unit
When the first determination unit determines that the subject is a periodic subject and the second determination unit does not determine that the subject is a periodic subject,
According to the detection result of the second determination unit during the driving of the focusing lens, the driving direction of the focusing lens is changed to obtain the different focus detection values;
An imaging apparatus characterized by the above.

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