JP6013019B2 - Imaging device - Google Patents

Description

  The present invention relates to an imaging apparatus.

  In an imaging apparatus such as a digital camera, the focusing range is limited by the lens optical system. For example, Patent Document 1 discloses a technique related to displaying a focused range on a liquid crystal monitor in advance. Patent Document 1 describes that a macro mode with a focusing range of 1 cm to 30 cm and a normal mode with a focusing range farther than that are provided.

JP 2011-102999 A

  When focusing on the closest position or the like, it may be necessary to greatly displace lenses other than the lens for focus adjustment. For this reason, for example, when switching between the case of focusing on the closest position and the case of focusing on the other position, the user needs to manually operate the optical system of the lens, for example. As described above, the operation of the user intentionally moving the optical system is difficult to understand and complicated.

  Therefore, an object of the present invention is to provide an imaging apparatus that can be easily and quickly controlled by a user even when focusing on a close position or the like.

In order to achieve the above object, according to an aspect of the present invention, an imaging apparatus includes an imaging unit that captures an image of a subject and acquires the image, an optical performance correction lens, and a focusing lens. When the distance to the subject is in the first range, the first state in which the optical performance correction lens is arranged so that the focus adjustment can be performed in cooperation with the focusing lens, and the distance to the subject is the first range. A second state in which the optical performance correction lens is arranged at a position different from the first state so that in-focus adjustment can be performed in cooperation with the focusing lens when the second range is different from the first range. When the distance to the subject is in the second range in the second state, the position of the focusing lens is located in any one of the first lens ranges, so that the subject Is formed on the imaging unit, and the aberration is within a predetermined range. A photographing lens configured to so that, anda lens controller for controlling the position of said focusing lens and the optical performance correcting lens, the lens control unit, an electric the optical performance correcting lens When it is possible to move the optical performance correction lens, when it is determined that the photographing lens is in the second state and the distance to the subject is in the first range, the optical performance correction lens is is changed from the state to the first state, the optical performance correcting lens manually when not moved unless operate, the photographing lens is the second state, and the distance to the subject When it is determined to be in the first range, the focusing lens is moved to a position in a second lens range closer to the first lens range.

  According to the present invention, it is possible to provide an imaging apparatus that can be easily and quickly controlled by a user even when focusing on a close position or the like.

1 is a block diagram illustrating a configuration example of an imaging apparatus according to an embodiment of the present invention. The block diagram which shows the structural example of the lens part which concerns on one Embodiment. 6 is a flowchart illustrating an example of control of a lens unit according to an embodiment. 6 is a flowchart illustrating an example of control of a digital camera according to an embodiment. The figure for demonstrating an example of the contrast value which concerns on one Embodiment. 6 is a flowchart illustrating an example of zoom driving and view angle adjustment processing according to an embodiment. The figure for demonstrating an example of the view angle adjustment which concerns on one Embodiment. The figure for demonstrating an example of the view angle adjustment which concerns on one Embodiment.

[First Embodiment]
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an outline of a digital camera 10 as an imaging apparatus according to the present embodiment. The digital camera 10 includes a signal processing control unit 1, an imaging unit 2, a recording unit 3, a display unit 4, a touch panel 5, an operation unit 6, and a lens unit 7.

  The lens unit 7 includes a focus adjustment lens group 71 and a zoom adjustment lens group 72. The focus adjustment lens group 71 is driven mainly for focus adjustment. The zoom adjustment lens group 72 is a lens group for changing the focal length of the lens. In this lens, when the zoom adjustment lens group 72 is located at a predetermined macro position, it is possible to focus even in the macro area at the closest position.

  The imaging unit receives an image via the lens unit 7 and generates an image signal. The recording unit 3 records captured image data and the like. The display unit 4 includes a liquid crystal display, for example. The display unit 4 displays a preview image, a captured image, various warnings, and the like. The touch panel 5 is arranged on the display unit 4 and acquires various inputs from the user. The operation unit 6 includes a release button, a zoom switch, and the like, and acquires various inputs from the user.

  The signal processing control unit 1 includes a focus evaluation unit 1a, a macro determination unit 1b, a lens control unit 1c, an angle of view adjustment unit 1d, an image processing unit 1e, a display control unit 1f, and a signal processing unit 1g. And a clock 1h. The focus evaluation unit 1a performs focus evaluation. For example, the focus evaluation unit 1a calculates the contrast value of the image acquired by the imaging unit 2, and evaluates the focus based on the contrast value. The macro determination unit 1b determines whether or not the subject is in the macro area based on the evaluation result of the focus evaluation unit 1a. The macro determination unit 1b determines whether or not the subject is in the macro area based on, for example, a change in the contrast value calculated by the focus evaluation unit 1a. The lens control unit 1c controls the operation of the lens. For example, the position of the focus adjustment lens group 71 or the zoom adjustment lens group 72 is changed to adjust the focus or to change the focal length. The lens controller 1c moves the zoom adjustment lens group 72 to the macro position. The angle-of-view adjustment unit 1d performs electronic zoom processing on the image acquired by the imaging unit 2 so as to cancel the change in the angle of view when the zoom adjustment lens group 72 moves toward the macro position. The image processing unit 1 e performs image processing on the image acquired by the imaging unit 2. The display control unit 1 f controls the display unit 4 to display an image on the display unit 4. The signal processing unit 1 g performs processing such as processing of input from the touch panel 5 and the operation unit 6 and recording processing to the recording unit 3. The clock 1h outputs the time necessary for recording the image capturing time and the like.

  A configuration example of the optical system of the lens unit 7 according to this embodiment is shown in FIG. As shown in this figure, the lens unit 7 according to this embodiment has five lens groups. The objective lens is the first group lens G1, and the second group lens G2, the third group lens G3, and the fourth group lens G4 are arranged in order toward the imaging unit 2, and the imaging unit 2 side is the fifth most. Let it be the lens G5 of the group.

  The first group lens G1 and the fifth group lens G5 are fixed. The second group lens G2 is driven by a first motor 74 and a feed screw 74s. The first motor 74 is, for example, a voice coil motor (VCM), and the position of the second group lens G2 is detected by a magnetic sensor. The second group lens G <b> 2 functions as the focus adjustment lens group 71.

  The third group lens G3 is driven by a second motor 75 and a feed screw 75s, and the fourth group lens G4 is driven by a third motor 76 and a feed screw 76s. The third group lens G3 and the fourth group lens G4 function as a zoom adjustment lens group 72 for changing the focal length. The second motor 75 and the third motor 76 are, for example, stepping motors.

  The lens G3 of the third group is provided with a linear encoder 77, and the position of the lens G3 of the third group is acquired using the linear encoder 77. The fourth group lens G4 is provided with a light shielding plate 78 and a photo interrupter 79, and the position of the fourth group lens G4 is acquired using the light shielding plate 78 and the photo interrupter 79. Such a lens optical system is housed in a lens frame.

  With this lens, when the zoom adjustment lens group 72 composed of the third group lens G3 and the fourth group lens G4 is disposed at a predetermined macro position, macro photography that focuses to a close distance can be performed. Although not described in the following description, fine adjustment of the positions of the third lens group G3 and the fourth lens group G4 is necessary to suppress aberrations.

  A flowchart of basic zoom control when such a lens is used is shown in FIG. In step S301, it is determined whether or not the zoom is changed. When the zoom is changed, the third group lens G3 and the fourth group lens G4 functioning as the zoom adjustment lens group 72 are moved in step S302. The process returns to step S301. In step S303, it is determined whether or not there is an instruction for focus adjustment. When there is an instruction for focus adjustment, the lens G2 of the second group that functions as the focus adjustment lens group 71 moves in step S304, and the process proceeds to step S303. Return to. In step S305, it is determined whether or not there is a macro shooting instruction. When there is a macro shooting instruction, in step S306, the third group lens G3 and the fourth group lens G4 move to the macro position, and step S307. The lens G2 of the second group is moved at, and the process returns to step S305.

  The lens unit 7 may be fixed to the main body of the digital camera 10 and cannot be removed, or may be removable and replaceable with respect to the main body. The digital camera 10 may be a camera for taking a still image, a camera for taking a moving image, or a camera capable of taking both a still image and a moving image.

  An operation of the digital camera 10 according to the present embodiment will be described. A flowchart showing an example of the operation of the digital camera 10 is shown in FIG. In step S101, the signal processing unit 1g of the signal processing control unit 1 determines whether or not the shooting mode is set. When it is determined that the shooting mode is set, the process proceeds to step S102. In step S102, the image processing unit 1e of the signal processing control unit 1 acquires an image from the imaging unit 2 and performs general image processing. The display control unit 1f of the signal processing control unit 1 causes the display unit 4 to perform through image display based on the image. In step S103, the focus evaluation unit 1a of the signal processing control unit 1 acquires a contrast value for the through image being displayed, and evaluates the focus based on the contrast value. The lens control unit 1c of the signal processing control unit 1 drives the focus adjustment lens group 71 of the lens unit 7 based on the focus evaluation result of the focus evaluation unit 1a to perform autofocus (AF) control.

  In step S104, the signal processing unit 1g of the signal processing control unit 1 determines whether or not a zoom operation instruction is input to the zoom switch of the operation unit 6. When it is determined that an instruction for zoom operation has been input, the process proceeds to step S105. The lens control unit 1c of the signal processing control unit 1 drives the zoom adjustment lens group 72 of the lens unit 7 in step S105. Thereafter, the process returns to step S101. If it is determined in step S104 that a zoom operation instruction has not been input, the process proceeds to step S106.

  The signal processing unit 1g of the signal processing control unit 1 determines whether or not the release button of the operation unit 6 has been depressed one step in step S106, that is, whether or not the first release has been performed. When it is determined that the first release has not been performed, the processing returns to step S101. When it is determined that the first release has been performed, the process proceeds to step S107. In step S107, the focus evaluation unit 1a of the signal processing control unit 1 acquires a contrast value, and the lens control unit 1c performs AF control of the lens unit 7 based on the contrast value. This AF control is a control for focusing on a predetermined position such as the center of an image, a designated position, a position corresponding to a person's face, or the like according to the first release.

  The focus evaluation unit 1a of the signal processing control unit 1 determines whether or not it is in focus in step S108. When it is determined that the subject is in focus, the process proceeds to step S111. If it is determined that the subject is not in focus, the process proceeds to step S109. In step S109, the macro determination unit 1b of the signal processing control unit 1 determines whether or not the contrast evaluation value calculated by the focus evaluation unit 1a has increased toward the closest side. When it is determined that the contrast value has increased toward the close side, the process proceeds to step S120.

  For example, as shown in FIG. 5, in this lens, the second group that functions as the focus adjustment lens group 71 when the zoom adjustment lens group 72 including the third group lens G3 and the fourth group lens G4 is located outside the macro position. By moving the lens G <b> 2, for example, a distance of 30 cm or more can be focused. In this case, when the lens G2 of the second group is moved so as to focus on a position closer than 30 cm, the acquired image deteriorates and the image quality deteriorates, for example, aberration increases. For this reason, in general, the second group lens G2 is not moved so as to focus on a position closer than 30 cm. On the other hand, when the zoom adjustment lens group 72 is in the macro position, it can be focused, for example, at a distance of 3 to 30 cm.

  For example, when the zoom adjustment lens group 72 is located at a position other than the macro position and the subject is at 15 cm, the process proceeds to step S109 without focusing. The contrast value at this time changes, for example, as shown by the solid line in FIG. Note that the broken line in FIG. 5 indicates the expected change in contrast value when the zoom adjustment lens group 72 is assumed to be at the macro position. As indicated by the solid line in FIG. 5, the contrast value obtained in the AF control in step S107 has increased on the near side. In such a case, the process proceeds to step S120.

  If it is determined in step S109 that the contrast curve has not increased on the near side, the process proceeds to step S110. That is, if it is determined that the subject is not in focus but is not in focus, the process proceeds to step S110. The display control unit 1f of the signal processing control unit 1 causes an out-of-focus warning such as displaying on the display unit 4 that the in-focus state is not achieved in step S110. In step S111, the signal processing unit 1g of the signal processing control unit 1 causes the imaging unit 2 to perform a shooting operation when the release button of the operation unit 6 is pushed in two steps, that is, when the second release is performed. That is, the signal processing control unit 1 causes the imaging unit 2 to generate an image signal based on an image via the lens unit 7 and acquires this image signal. The image processing unit 1 e of the signal processing control unit 1 processes the image signal and causes the recording unit 3 to record it.

  In step S120, the signal processing unit 1g of the signal processing control unit 1 determines whether or not the digital camera 10 is in the electric zoom mode. When it is determined that the electric zoom mode is set, the process proceeds to step S121. In step S121, the signal processing unit 1g of the signal processing control unit 1 determines whether or not the zoom adjustment lens group 72 of the lens unit 7 is in the macro position. When the zoom adjustment lens group 72 is at the macro position, the process proceeds to step S110. That is, when the subject is closer to the focus range when the zoom adjustment lens group 72 is at the macro position, the process proceeds to step S110. On the other hand, when the zoom adjustment lens group 72 is not in the macro position, the process proceeds to step S122.

In the present embodiment, the zoom adjustment lens group 72 is moved to the macro position after step S122. At this time, the angle of view changes as the zoom adjustment lens group 72 moves. In the present embodiment, the electronic zoom is performed so as to cancel the change in the angle of view. Therefore, the angle-of-view adjusting unit 1d of the signal processing control unit 1 calculates a necessary electronic zoom magnification in step S122. In step S123, the angle-of-view adjustment unit 1d of the signal processing control unit 1 determines whether or not the electronic zoom magnification is smaller than the recorded image reduction rate. That is, it is determined whether or not image data having a size corresponding to the recorded image can be obtained. Here, the electronic zoom magnification is expressed as follows when the current focal length by the zoom adjustment lens group 72 is fN and the focal length of the macro position is fM.
Electronic zoom magnification = fN / fM
Given in.

  If the electronic zoom magnification is greater than or equal to the recorded image reduction ratio, the process proceeds to step S124. The display control unit 1f of the signal processing control unit 1 causes an image degradation warning such as displaying on the display unit 4 that the image is degraded in step S124. Thereafter, the process proceeds to step S125. When the electronic zoom magnification is smaller than the recorded image reduction ratio, the process proceeds to step S125.

  In step S125, the signal processing control unit 1 performs zoom driving and field angle adjustment processing. The zoom drive and angle of view adjustment processing will be described with reference to the flowchart shown in FIG. In step S201, the lens control unit 1c of the signal processing control unit 1 drives the zoom adjustment lens group 72 toward the macro position. At this time, the lens control unit 1c drives the optical system so that the magnification becomes, for example, n times every step. In step S202, the angle of view adjusting unit 1d of the signal processing control unit 1 adjusts the angle of view with the electronic zoom. The angle-of-view adjustment unit 1d multiplies the image by 1 / n, for example, every step. By doing so, the change in the angle of view due to the movement of the zoom adjustment lens group 72 in step S201 is canceled by the electronic zoom in step S202, and the operation becomes quick and natural, so that the user does not feel uncomfortable. Although there is optical zoom control that takes time in this way, it is electrically corrected at high speed to make it inconspicuous and to ensure optical performance. The user can use the camera without being aware of the performance limit of the lens, and never miss a photographing opportunity. In step S202, the signal processing unit 1g of the signal processing control unit 1 determines whether or not the zoom adjustment lens group 72 has reached the macro position. If the macro position has not been reached, the process returns to step S201. If the macro position has been reached, the process returns to the flow shown in FIG. During zoom driving and angle of view adjustment processing, for example, a display such as “macro transition in progress” is displayed on the display unit 4 to notify the user that the zoom adjustment lens group 72 is moving as described above. Also good.

  The effects of the zoom drive and the view angle adjustment process will be described with reference to FIGS. For example, it is assumed that an image is acquired at an angle of view as shown in FIG. At this time, it is assumed that the zoom adjustment lens group 72 has moved to the macro position. As a result, it is assumed that an image is acquired at an angle of view as shown in FIG. At this time, in the present embodiment, in order to prevent the angle of view from changing from the state shown in FIG. 7A, electronic zoom is performed by using the image in the region indicated by the broken line in FIG. The angle of view is adjusted as shown in FIG.

  For example, it is assumed that an image is acquired at an angle of view as shown in FIG. At this time, it is assumed that the zoom adjustment lens group 72 has moved to the macro position. As a result, an image is acquired with an angle of view as shown in FIG. At this time, in the present embodiment, the angle of view is adjusted as shown in FIG. 8C by electronic zoom using the obtained image so that the angle of view does not change from the state shown in FIG. Done. In this case, the area indicated by hatching in FIG. 8C without image information is an area in which no image is displayed.

  Returning to FIG. 4, the description will be continued. The focus evaluation unit 1a of the signal processing control unit 1 acquires a contrast value in step S126, and performs AF control of the lens unit 7 based on the contrast value. The focus evaluation unit 1a determines whether or not focus is achieved in step S127. When it is determined that the subject is in focus, the process proceeds to step S111. When it is determined that the subject is not in focus, the process proceeds to step S110.

  When it is determined in step S120 that the electric zoom mode is not set, the process proceeds to step S130. At this time, the zoom adjustment lens group 72 is fixed and cannot be moved unless the user manually operates it. In step S130, the lens control unit 1c of the signal processing control unit 1 determines whether or not the focus adjustment lens group 71 can move so as to focus on the closest side. When it is determined that the camera can move to the close side, the process proceeds to step S131. In step S131, the lens control unit 1c of the signal processing control unit 1 moves the focus adjustment lens group 71 further to the close side so as to be focused.

  The focus evaluation unit 1a of the signal processing control unit 1 acquires a contrast value in step S132. The lens control unit 1c of the signal processing control unit 1 performs AF control of the lens unit 7 based on the contrast value. The focus evaluation unit 1a of the signal processing control unit 1 determines whether or not it is in focus in step S133. When it is determined that the subject is in focus, the process proceeds to step S134. When it is determined that the subject is not in focus, the process proceeds to step S136. The display control unit 1f of the signal processing control unit 1 causes an image degradation warning such as displaying on the display unit 4 that the image is degraded in step S134. The image processing unit 1e of the signal processing control unit 1 performs a process of making the deterioration of the image inconspicuous, such as a blurring process, in the portion where the image is deteriorated in step S135. Thereafter, the process proceeds to step S111. In other words, in the present embodiment, the focus adjustment lens group 71 is moved to a position where an acquired image is deteriorated, for example, when aberration is increased. In this way, priority is given to focusing even if the image deteriorates. The deteriorated portion of the image is processed so that the deterioration of the image is not noticeable or uncomfortable by blurring processing, correction processing, and other filter processing.

  When it is determined in step S130 that it cannot move to the closest side, the process proceeds to step S136. The display control unit 1f of the signal processing control unit 1 performs a non-focus warning such as displaying on the display unit 4 that the focus is not achieved in step S136. Thereafter, the process proceeds to step S111.

  When it is determined in step S101 that the shooting mode is not selected, the process proceeds to step S141. In step S141, the signal processing unit 1g of the signal processing control unit 1 determines whether or not the playback mode is set. If it is determined in step S141 that the playback mode is set, the process proceeds to step S142. In step S142, the signal processing unit 1g of the signal processing control unit 1 performs image reproduction processing. Thereafter, the process proceeds to step S143. If it is determined in step S141 that the playback mode is not set, the process proceeds to step S143. The signal processing unit 1g of the signal processing control unit 1 determines whether or not an end instruction is input in step S143. When an end instruction is input, the process ends. If no termination instruction has been input, the process returns to step S101.

  According to the present embodiment, in the electric zoom mode, when it is determined that the zoom adjustment lens group 72 is not in the macro position and the subject is on the close side but is not in focus, the zoom adjustment lens group 72 Is moved to the macro position. At this time, the change in the angle of view is canceled by the electronic zoom. As a result, the user can focus to the closest position without being aware of whether or not the zoom adjustment lens group 72 is at the macro position.

  Even in the case of not being in the electric zoom mode, the focus adjustment lens group 71 is moved to a position that is not generally used due to image degradation or the like, and focusing is obtained. As a result, the situation of not focusing can be avoided. In this case, the deterioration of the image quality is processed so as not to stand out by blurring processing or the like.

  Thus, for example, the zoom adjustment lens group 72 functions as an optical performance correction lens. For example, the zoom adjustment lens group 72 functions as a macro switching lens. For example, the focus adjustment lens group 71 functions as a focusing lens. For example, the lens unit 7 includes a first state in which the optical correction lens is arranged so that the focus adjustment can be performed in cooperation with the focusing lens when the distance to the subject is in the first range, The optical correction lens is arranged at a position different from the first state so that the focus adjustment can be performed in cooperation with the focusing lens when the distance is a second range different from the first range. It functions as a photographic lens having the second state. In addition, for example, the lens unit 7 has a first state in which the macro switching lens is disposed at a macro position so that the focus adjustment can be performed when the distance to the subject is the first range, which is the close range, and the subject. The macro switching lens functions as a lens having a second position where the macro switching lens is disposed at a position other than the macro position or the macro position so that the focus adjustment can be performed when the distance is a second range farther than the first range. . For example, the imaging unit 2 functions as an imaging unit that captures an image of the subject through the lens and acquires an image. For example, when it is determined that the lens is in the second state and the distance to the subject is in the first range, the lens control unit 1c moves the optical performance correction lens from the second state to the first state. It functions as a lens control unit for changing to the first state. For example, when the lens control unit 1c determines that the lens is in the second state and the distance to the subject is closer to the second range, the lens control unit 1c moves the lens to the second state. It functions as a lens controller that changes the state from the state to the first state. For example, when the focal length changes when the view angle adjustment unit 1d changes from the second state to the first state, the change in the view angle that occurs according to the change in the focal length is performed on the image. It functions as an angle of view adjustment unit that cancels out by zooming. For example, the macro determination unit 1b functions as a determination unit that determines the range of the distance. Further, for example, the macro determination unit 1b functions as a determination unit that determines whether or not the distance to the subject is closer to the second range.

  Further, for example, the lens unit 7 includes a focus adjustment lens, and when the distance to the subject is in the first distance range, the position of the focus adjustment lens is located in any one of the first lens ranges. Thus, the image of the subject is formed on the imaging unit, and functions as a lens configured so that the aberration is in a predetermined range. For example, the macro determination unit 1b functions as a determination unit that determines whether or not the distance to the subject is closer to the first distance range. For example, when it is determined that the distance to the subject is closer to the subject than the first distance range, the lens control unit 1c moves the focus adjustment lens to a second lens range other than the first lens range. It functions as a lens control unit that moves to a position. For example, when the focus adjustment lens moves to the second lens range, the image processing unit 1e is an image processing unit that performs a blurring process on a region of the image in which the aberration exceeding the predetermined range occurs. Function.

  The configuration of the optical system of the lens unit 7 described with reference to FIG. 2 is an example, and any number of lenses may be configured, and any number of lenses may be included in each lens group. However, it is assumed that the lens unit 7 has a lens that functions as a macro switching lens. The lens that functions as the macro switching lens may not be a lens for changing the focal length. In the present embodiment, the lens unit 7 has been described as a zoom lens. However, the lens unit 7 may be a single focus lens. There are lenses having a normal shooting mode and a macro shooting mode as well as single focus lenses. In the case of such a lens, the position of the predetermined lens group differs between the normal shooting mode and the macro shooting mode. This predetermined lens group functions as a macro switching lens as in the zoom adjustment lens group of the present embodiment. Macro switching is used when shooting a subject near 1 m, but may be a distance closer than 1 m, and may be applied to a specification that changes depending on the lens and switches at 50 cm or 30 cm. In general, the user is not conscious of such limitations and concentrates on shooting, so it is often confused because the user cannot take a picture too close to the subject. In addition, regardless of the macro, this concept can be used even with a camera that involves changing the focal length in order to obtain a specific shooting distance. Here, it is assumed that correction is performed while moving a correction lens group functioning as an optical performance correction lens in the optical axis direction and acquiring an image. In this case, for example, a correction lens group is arranged in the lens unit 7 instead of the macro switching lens. As described above, in the above-described embodiment, the switching of the macro shooting is described as an example, but the same applies to the switching of other shooting distances.

  The lens unit 7 may be removable and replaceable with respect to the camera body. When the lens unit 7 is removable from the camera body, the lens unit 7 and the camera body communicate with each other and function in the same manner as in this embodiment. In this case, the lens unit 7 stores various information related to the lens. For example, the macro position of the zoom adjustment lens group 72, the focal length at that time, the movable range of the focus adjustment lens group 71, the relationship between the position of the focus adjustment lens group 71 and image degradation, and the like are stored in advance. Even when the lens unit 7 is detachable from the camera body, the imaging device functions in the same manner and obtains the same effect.

  In the present embodiment, the in-focus determination is performed based on the contrast value. However, it is not limited to this. Focus evaluation may be performed using the phase difference of the image. The focus evaluation unit 1a can determine whether or not the subject is in the closest position even using the phase difference.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the column of problems to be solved by the invention can be solved and the effect of the invention can be obtained. The configuration in which this component is deleted can also be extracted as an invention.

In addition, the following invention is also contained in said embodiment of this invention.
(1) In a camera having a control unit that controls a photographing lens having a zoom switching lens and a focusing lens, the zoom switching is performed when the control unit controls the focusing lens to a specific distance. A camera that controls switching of a lens position to a specific zoom position.
(2) An optical performance correction lens and a focusing lens are provided, and the optical correction is performed so that the focus adjustment can be performed in cooperation with the focusing lens when the distance to the subject is in the first range. The optical correction lens so that focusing adjustment can be performed in cooperation with the focusing lens when the lens is in a first state and the distance to the subject is in a second range different from the first range. A photographic lens having a second state in which is disposed at a position different from the first state;
An image capturing unit that captures an image of the subject through the photographing lens to obtain an image;
When it is determined that the photographing lens is in the second state and the distance to the subject is in the first range, the optical performance correction lens is changed from the second state to the first state. A lens control unit,
A display unit that displays that the optical performance correction lens is changing when the second state changes from the second state to the first state;
An imaging apparatus comprising:

  DESCRIPTION OF SYMBOLS 1 ... Signal processing control part, 1a ... Focus evaluation part, 1b ... Macro determination part, 1c ... Lens control part, 1d ... Angle of view adjustment part, 1e ... Image processing part, 1f ... Display control part, 1g ... Signal processing part DESCRIPTION OF SYMBOLS 2 ... Imaging part, 3 ... Recording part, 4 ... Display part, 5 ... Touch panel, 6 ... Operation part, 7 ... Lens part, 10 ... Digital camera, 71 ... Focus adjustment lens group, 72 ... Zoom adjustment lens group, 74 DESCRIPTION OF SYMBOLS 1st motor, 74s ... Feed screw, 75 ... 2nd motor, 75s ... Feed screw, 76 ... 3rd motor, 76s ... Feed screw, 77 ... Linear encoder, 78 ... Light-shielding plate, 79 ... Photointerrupter.

Claims (5)

An imaging unit that captures an image of a subject and obtains the image;
An optical performance correction lens and a focusing lens; and when the distance to the subject is in the first range, the optical performance correction lens is adjusted so that the focus can be adjusted in cooperation with the focusing lens. The optical performance correction lens is arranged so that the focus adjustment can be performed in cooperation with the focusing lens when the first state is arranged and the distance to the subject is a second range different from the first range. And when the distance to the subject is in the second range in the second state, the position of the focusing lens is the first state. A photographic lens configured so that an image of the subject is formed on the imaging unit and the aberration is within a predetermined range by being located in any one lens range;
A lens controller that controls the positions of the optical performance correction lens and the focusing lens;
Comprising
The lens control unit
When it is possible to electrically move the optical performance correction lens, when it is determined that the photographing lens is in the second state and the distance to the subject is in the first range, Changing the optical performance correcting lens from the second state to the first state;
The optical performance correcting lens manually when not moved to be operated to, when the photographing lens is the second state, and the distance to the subject is determined to be a first range, The imaging apparatus, wherein the focusing lens is moved to a position in a second lens range that is closer to the first lens range.   When the focusing lens moves to the second lens range, the image processing unit further includes an image processing unit that performs image processing on a region of the image where the aberration exceeds the predetermined range. The imaging apparatus according to claim 1. The photographing lens is a zoom lens whose focal length can change,
When the focal length changes when the optical performance correction lens changes from the second state to the first state, the change in the angle of view that occurs in response to the change in the focal length is changed to the electronic zoom. An angle of view adjustment unit that cancels out by
The imaging apparatus according to claim 1 or 2, wherein   A determination unit configured to determine a range of the distance; the determination unit calculates a contrast value of the image; and based on a change in the contrast value, whether the distance to the subject is the first range The imaging apparatus according to claim 1, wherein it is determined whether or not.   A determination unit configured to determine a range of the distance, wherein the determination unit determines whether or not a distance to the subject is within the first range based on a phase difference of the image of the subject; The imaging apparatus according to any one of claims 1 to 3.

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