JP2015118231A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device capable of improving operability by changing the operation sensitivity of manual focusing on the basis of a state at the end of autofocusing in a case of actuating the manual focusing after the autofocusing.SOLUTION: An imaging device includes: acquisition means acquiring an aperture value and a diameter of a least circle of confusion; and first setting means setting a drive amount of a focusing optical system corresponding to a unit manipulated variable of a manual operation unit for manual focusing after end of the autofocusing on the basis of the aperture value and the diameter of a least circle of confusion at the end of autofocusing acquired by the acquisition means.

Description

  The present invention relates to an imaging apparatus.

  2. Description of the Related Art Conventionally, there is a lens barrel that determines a driving amount of a focus lens with respect to a manual focus operation amount based on depth-of-field information in a lens barrel used in an imaging apparatus. With such a lens barrel, focusing is easy near the in-focus position when the depth of field is shallow, but when the amount of focus deviation is large, the in-focus position must be increased without increasing the manual focus operation amount. The position cannot be reached. Therefore, in order to improve operability during manual focus, a lens barrel has been proposed in which the manual focus operation sensitivity is variable from the focus information and the position of the focus lens (Patent Document 1).

  In addition, some have a function capable of manual focusing after autofocusing (without switching operation), and can be switched to manual focusing when a manual operation member is driven in the autofocus mode (Patent Document 2). In such an imaging apparatus, the user can manually adjust the focus when it is desired to blur the focus after autofocusing, or when the desired position is not in focus.

JP 2011-215383 A JP 2003-337278 A

  In an imaging apparatus capable of manual focusing after autofocusing, the user can perform fine adjustment from a desired focus position or coarse adjustment from a greatly defocused position. That is, it is preferable to switch the manual focus operation sensitivity when switching to manual focus after autofocus.

  However, the prior art disclosed in Patent Document 1 can change the operation sensitivity during manual focus, but does not disclose a method for switching operation sensitivity in a lens barrel capable of operating manual focus after autofocus. . The prior art disclosed in Patent Document 2 also does not disclose switching the manual focus operation sensitivity when switching to manual focus without switching operation after autofocus.

  An object of the present invention is to provide an imaging device that improves operability by switching the operation sensitivity of manual focus based on the state at the end of autofocus when manual focus is activated after autofocus.

  The image pickup apparatus according to the present invention includes an acquisition unit that acquires an aperture value and a minimum circle of confusion, and the autofocus based on the aperture value and the minimum circle of confusion obtained when the autofocus is acquired and acquired by the acquisition unit. And a first setting unit that sets a driving amount of the focusing optical system corresponding to a unit operation amount of the manual operation unit in the manual focus after the focus is finished.

  Further, another imaging apparatus according to the present invention is based on an acquisition unit that acquires an aperture value and a minimum circle of confusion, and an aperture value and a minimum circle of confusion that are acquired by the acquisition unit when autofocus is completed. The second setting means for setting the movement amount of the focus surface corresponding to the unit operation amount of the manual operation unit in the manual focus after the autofocus is completed, and the unit set by the second setting means First setting means for setting a driving amount of a focusing optical system corresponding to a unit operation amount of the manual operation unit in the manual focus based on a moving amount of a focus surface corresponding to the operation amount. Features.

  According to the present invention, when manual focus is activated after autofocus, it is possible to provide an imaging apparatus that improves operability by switching the manual focus operation sensitivity based on the state at the end of autofocus.

6 is a flowchart illustrating a shooting operation when performing manual focus (MF) during an autofocus (AF) mode in the digital camera as the imaging apparatus according to the first embodiment of the present invention. It is a schematic sectional drawing of the digital camera as an imaging device which concerns on 1st Embodiment. 1 is a system block diagram of a digital camera as an imaging apparatus according to a first embodiment. It is a schematic diagram of the signal output when the electronic ring as a manual operation part in manual focus rotates. It is a system block diagram of the digital camera as an imaging device which concerns on the 2nd Embodiment of this invention. 10 is a flowchart illustrating a shooting operation when performing manual focus (MF) during an autofocus (AF) mode in a digital camera as an imaging apparatus according to a second embodiment of the present invention.

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

<< First Embodiment >>
(Imaging device)
1) Device Configuration FIG. 2 is a cross-sectional view of a digital camera (imaging device, optical device) of the present embodiment configured as a lens interchangeable digital single-lens reflex camera, where 100 is a camera body and 200 is a camera body 100. A lens barrel (interchangeable lens) that can be mounted. The imaging device of the present invention may be of any type, such as a lens-integrated camera or a film camera. Further, the imaging apparatus includes a camera body with interchangeable lenses, a camera system having a camera body with interchangeable lenses and an interchangeable lens, a lens-integrated camera, and the like.

  As shown in FIG. 2, the camera body 100 includes a main mirror 102, a sub mirror 104, a focus detection unit 106, a shutter 108, an image sensor 110, a pentaprism 112, a finder optical system 114, and a monitor (display unit) 116.

  The main mirror 102 reflects a part of the light beam that has passed through the lens barrel 200 to the finder optical system 114 and transmits a part of the light beam. The sub mirror 104 reflects the light beam transmitted through the main mirror 102 to the focus detection unit 106. As shown in FIG. 2, the main mirror 102 and the sub mirror 104 are arranged between the non-shooting state arranged on the optical axis and the state during still image shooting and moving image shooting (not shown) withdrawn from the optical axis. It is configured to be movable. Note that this embodiment can also be applied to a so-called mirrorless camera without the main mirror 102 and the sub mirror 104.

  The focus detection unit 106 includes a condenser lens (not shown) that divides incident light into two light beams, two separator lenses that re-image the light, and a line sensor such as a CCD that photoelectrically converts the formed subject image. . That is, the focus detection unit 106 is an AF sensor that detects a focus state by a phase difference method.

  The shutter 108 is a means for opening during the exposure time at the time of photographing and shielding light at other times. The shutter 108 is opened to start exposure after a photometric end signal is output. The image sensor 110 is a CMOS or CCD that photoelectrically converts an optical image of an object. The pentaprism 112 and the finder optical system 114 allow the user to view the subject image with a finder (not shown).

  The monitor 116 is a display unit that is provided on the back surface of the camera body 100 and displays an image based on a signal output from the image sensor 110 and a stored image. The monitor 116 can also sequentially display images (live view images) based on signals output from the image sensor 110.

  As shown in FIG. 2, the lens barrel (interchangeable lens) 200 includes a first lens group 202, a second lens group 204 as a focusing optical system (focus lens), an aperture unit (aperture means) 206, which will be described later. A manual operation unit 208 is provided. The first lens group 202 and the second lens group 204 constitute an imaging optical system (photographing lens) that forms an optical image of an object. The imaging optical system may have a larger number of lens groups, or may include a lens group of a variable magnification optical system and a driving mechanism.

  In the focus adjustment, the second lens group 204 is moved in the optical axis direction. The light amount of the light beam (photographing light) passing through the first lens group 202 is limited by the diaphragm unit 206. The aperture unit 206 includes an aperture drive unit as a drive unit controlled by the lens CPU 210 in accordance with an aperture operation command transmitted from the camera CPU 118, and an aperture unit that is driven by the aperture drive unit and determines an aperture area. . The aperture unit 206 that adjusts the amount of light is configured so that the aperture value (F value) can be adjusted. The diaphragm may be provided in the camera body 100, or may be provided in both the camera body 100 and the lens barrel 200.

2) Manual Operation Unit The manual operation unit 208 of the present embodiment is embodied as an electronic ring that is rotatably fixed to the lens barrel 200 that houses the imaging optical system. That is, the manual operation unit 208 outputs two rectangular pulse signals whose phases are shifted by 90 degrees as shown in FIG. 4 from a position sensor such as a photo interrupter (not shown). Then, the second lens group 204 as a focusing optical system is driven according to the number of pulses of the output pulse signal (corresponding to the driving amount).

  In the present embodiment, as will be described in detail later, the second lens group 204 corresponding to the unit operation of the manual operation unit 208 when the manual focus is activated based on the depth of focus on the focus surface at the end of autofocus. The driving amount is determined.

3) Camera body 100
FIG. 3 is a system block diagram of the digital camera shown in FIG. As shown in FIG. 3, the camera body 100 includes a camera CPU (control unit) 118, a camera contact 120, a power switch 122, a release switch 124, a photometry unit 126, a distance measurement unit 128, a signal processing unit 130, and an image recording unit 132. Is provided. The camera body 100 further includes a camera shooting mode switching unit 134 and an input unit 136 for inputting by an operator.

  The camera CPU 118 in the camera main body 100 is configured by a microcomputer, controls the components of the camera main body 100, and communicates with a lens CPU 210 described later to acquire various types of information. The camera CPU 118 includes a unit movement amount setting unit 118a, an aperture value acquisition unit 118b, a minimum confusion circle diameter acquisition unit 118c, and a drive amount conversion unit 118d.

  In the present embodiment, the drive amount conversion unit 118d functions as a first setting unit that sets the drive amount of the focusing optical system corresponding to the unit operation amount of the manual operation unit. The unit movement amount setting unit 118a functions as a second setting unit that sets the movement amount of the focus surface corresponding to the unit operation amount of the manual operation unit in the manual focus after the autofocus is finished.

  Here, regarding the unit movement amount setting unit 118a of the camera CPU 118, the “unit movement amount” refers to the movement amount of the in-focus position (focus plane) corresponding to the unit operation of the manual operation unit 208 in the manual focus (hereinafter referred to as MF) mode. Means. How is the movement amount (unit movement amount) of the in-focus position (focus plane) corresponding to the unit operation of the manual operation unit 208 acquired, and how is the driving amount (unit driving amount) of the second lens group 204? Whether it is determined will be described with reference to a flowchart described later.

  In addition, the aperture value acquisition unit 118b of the camera CPU 118 acquires the aperture value F (current aperture value) of the aperture that adjusts the amount of light from the lens CPU 210 that communicates with the aperture unit 206. The minimum confusion circle diameter acquisition unit 118c of the camera CPU 118 acquires the diameter of the minimum confusion circle of the photographing optical system from the lens CPU 210. The least circle of confusion is the smallest circle that serves as a standard for lens design.

  Strictly speaking, the lens can never form an image with a point as a point because spherical aberration and astigmatism exist. That is, the image is formed as a collection of circles with a certain area.

  Therefore, when the diameter of the circle increases, the image becomes blurred. This circle is called a circle of confusion. Of these circles of confusion, the smallest circle that serves as a standard for lens design is called the minimum circle of confusion, and the circle that is allowed on the screen is called the allowable circle of confusion.

  Further, the drive amount conversion unit 118d of the camera CPU 118 uses a value obtained by multiplying the unit movement amount set by the unit movement amount setting unit 118a based on the information acquired from the lens CPU 210 by the coefficient input by the input unit 136. The unit drive amount of the group 204 is converted. Note that information acquired from the lens CPU 210 is position information and zoom position information of the second lens group 204 detected by a lens position information detection unit 216 described later, and a conventional method is used for this conversion processing. Detailed description is omitted for use.

  In the camera main body 100, the camera contact 120 includes a signal transmission contact for transmitting a signal to the lens barrel side and a power contact for supplying power to the lens side. The power switch 122 can be operated by the user from the outside. The camera CPU 118 is activated to supply power to the actuators and sensors in the system and to operate the system.

  The release switch 124 is a two-stage stroke release switch that can be operated from the outside, and its signal is input to the camera CPU 118, and different control is performed depending on the shooting mode set in the shooting mode switching unit 134 described later. For example, when the release switch 124 detects that the first stroke switch (SW1) has been operated to ON, an autofocus (AF) shooting preparation operation is performed. The AF shooting preparation operation is the determination of the exposure amount by the photometry means 126 and the distance measurement of the subject existing in the distance measurement area by the distance measurement means 128 comprising an AF sensor.

  Further, when it is detected that the second stroke switch (SW2) has been operated to ON, the release switch 124 performs a photographing operation, a digital image signal creating operation, and a recording operation.

  In the camera body 100, the signal processing unit 130 performs various processes on the digitally converted output from the image sensor 110. The image recording unit 132 records and stores the image data output from the signal processing unit 130 in a recording medium (not shown). The shooting mode switching unit 134 sets each mode when a shooting mode such as an AF mode, an MF mode, or a live view shooting mode is selected by the user. The input unit 136 is a dial, button, screen, lever, or the like for the user to input or set various information.

4) Lens barrel 200
As shown in FIG. 3, the lens barrel 200 includes a lens CPU 210, a lens contact 212, a lens driving unit 214, a lens position information detection unit 216, and a manual operation unit 218. Here, the lens CPU 210 communicates with the camera CPU 118 and controls each part of the lens barrel 200. The lens CPU 210 includes a rotation detection unit 210a, and detects a rotation amount and a rotation direction when the manual operation unit 208 is rotated by a sensor such as a photo interrupter (not shown).

  The lens contact 212 includes a signal transmission contact that transmits a signal from the camera body 100 and a power contact that is supplied with power from the camera body 100 side. The lens driving unit 214 drives the second lens group 204 in the optical axis direction. The lens position information detection unit 216 includes an encoder that detects the amount of movement of the second lens group 204.

(flowchart)
Next, FIG. 1 is a flowchart showing the operation of the camera when executing MF during the AF mode in the present embodiment. The flowchart shown in FIG. 1 can be embodied as a program for causing a computer to execute each step. In the present embodiment, software is stored in a memory (not shown) provided in the camera CPU 118.

  When the power switch 122 of the camera body 100 is turned on (S1), the camera CPU 118 determines whether or not the shooting mode is set to the AF mode by the shooting mode switching unit 130 (S2). If the AF mode is selected, the camera CPU 118 determines whether SW1 of the release switch 124 is ON (S3). On the other hand, if the AF mode is not selected, the camera CPU 118 executes processing corresponding to the other mode (S15), and returns to S2.

  If SW1 is ON in S3, the camera CPU 118 determines the exposure amount (that is, photometry of the subject) by the photometry means 126 and AF detection by the distance measurement means 128 (that is, the subject existing in the distance measurement area). Ranging is started (S4). Then, the lens driving amount in AF is calculated based on the distance measurement result (S5), a lens driving command is transmitted to the lens CPU 210, and lens driving control in AF is started (S6). If SW1 is OFF in S3, the process returns to S2.

  When the lens drive control is completed and the lens is stopped (AF is terminated) (S7), the camera CPU 118 receives the aperture value F, the position information of the second lens group 204, the minimum circle of confusion δ from the lens CPU 210 (FIG. 2). Is acquired (S8).

  In S9 following S8, the movement amount (unit) of the focus plane corresponding to the unit operation of the manual operation unit is determined by the unit movement amount setting unit 118a (FIG. 2) from the aperture value F and the minimum circle of confusion δ acquired in S8. (Movement amount) is set (acquired and calculated). Specifically, as the product Fδ of the aperture value F, which is the acquisition result of the aperture value acquisition unit 118b, and the diameter δ of the minimum circle of confusion circle, which is the acquisition result of the minimum confusion circle diameter acquisition unit 118c, the unit operation of the manual operation unit is performed. Set (acquire, calculate) the movement amount (unit movement amount) of the corresponding focus surface.

  Here, when the value of Fδ is small, the smaller the unit movement amount, the easier it is to adjust the focus.

  In S9, based on the product of the unit movement amount set by the unit movement amount setting unit 118a and an arbitrary coefficient α newly input or input by the input unit 136, the unit movement amount per unit operation is determined. The drive amount (unit drive amount) of the second lens group 204 is acquired (calculated).

  After S9, the camera CPU 118 determines whether SW2 of the release switch 124 is ON (S10). If SW2 is ON, the shutter 108 is opened and exposure is performed (S13), the image captured by exposure is recorded in the image recording unit 132 (S14), and the process returns to S2. On the other hand, if SW2 is OFF, the process proceeds to S11.

  If the manual operation unit 218 is rotated in S11, the rotation detection unit 210a (FIG. 2) detects rotation based on a pulse output when the rotation operation is performed. In S12, a full-time manual function (performs MF for manual focusing via the manual operation unit without switching operation after autofocusing for automatically focusing by displacing the focusing optical system with respect to the imaging surface) is activated. To do. That is, the second lens group 204 is driven according to the unit drive amount of the second lens group 204 acquired (calculated) by the drive amount conversion unit 118d and the operation amount of the manual operation unit 208.

  When the manual operation ends, the process returns to S10. On the other hand, if the manual operation unit 218 is not operated in S11, the process similarly returns to S10. If a coefficient is newly input to the input unit 136 during the cycle from S10 to S12, the process returns to S9 again to recalculate the unit driving amount of the second lens group 204. Although not shown in the flowchart of FIG. 1, if SW1 is turned off again before SW2 is turned on in each step, the process returns to S2.

  In the present embodiment, the unit movement amount is set by the unit movement amount setting unit 118a so that the movement amount (unit movement amount) of the focus surface corresponding to the unit operation of the manual operation unit 208 becomes an amount proportional to the depth of focus. . Thereafter, the actual driving amount (unit driving amount) of the second lens group 204 is converted by the driving amount conversion unit 118d. However, if the relationship between the unit movement amount of the focus surface and the unit driving amount of the second lens group 204 is known, the second movement based on the relationship without setting (acquiring and calculating) the unit movement amount. The unit driving amount of the lens group 204 may be acquired (calculated).

(Effect of this embodiment)
According to the present embodiment, when MF is executed after the AF focusing operation, the manual operation adjustment sensitivity is determined from the aperture value and the minimum circle of confusion at the end of AF (after AF focusing). Therefore, the user can perform focus adjustment according to lens position information during MF after AF focusing operation, and focus adjustment with high operability and focus adjustment accuracy is possible.

<< Second Embodiment >>
FIG. 5 is a system block diagram of a digital camera as an imaging apparatus according to the second embodiment of the present invention. Since the configuration of the digital camera of this embodiment is the same as that of the first embodiment, description of the camera configuration is omitted. The difference from the first embodiment is only in the camera CPU 118, and the other points are the same. Therefore, only the camera CPU 118 which is the difference will be described.

  In FIG. 5, the camera CPU 118 includes a unit speed setting unit 118a, an aperture value acquisition unit 118b, a minimum circle of confusion circle diameter acquisition unit 118c, and a drive amount conversion unit 118d, as well as a rotational speed calculation unit 118e characteristic of the present embodiment. Have

  The unit movement amount setting unit 118a sets a unit movement amount that is a movement amount of the in-focus position (focus plane) by the photographing optical system corresponding to the unit operation of the manual operation unit 218 during the manual focus (MF) mode. Also in the present embodiment, the unit movement amount setting unit 118a as the setting unit has the aperture value acquired by the aperture value acquisition unit 118b and the minimum confusion circle diameter acquisition unit 118c as the acquisition unit for the unit movement amount of the in-focus position (focus plane). It is set as the product Fδ of the value F and the diameter δ of the minimum circle of confusion.

  The rotation speed calculation unit 118e calculates the rotation speed of the manual operation unit (electronic ring) 208 based on the rotation amount per predetermined sampling time stored in the camera CPU 118 or the lens CPU 210 in advance. Then, a coefficient to be multiplied by Fδ set by the unit movement amount setting unit 118a is determined. The rotation amount of the manual operation unit 208 is detected by a rotation detection unit 210a in the lens CPU 210. Therefore, the rotation speed calculation unit 118e may be provided in the lens CPU 210 instead of the camera CPU 118. The method for calculating the rotational speed is not limited to the above-described method.

  The drive amount conversion unit 118d serving as a determining unit uses the rotation speed of the manual operation unit 208 calculated by the rotation speed calculation unit 118e to the unit movement amount set by the unit movement amount setting unit 118a based on the information acquired from the lens CPU 210. Multiply by the coefficient calculated from Then, the product of the unit movement amount set by the unit movement amount setting unit 118a and the coefficient calculated from the rotation speed of the manual operation unit 208 calculated by the rotation speed calculation unit 118e is the unit drive of the second lens group 204. The unit drive amount is determined in terms of the amount.

  Next, FIG. 6 is a flowchart showing the operation of the camera when MF is executed during the AF mode in the present embodiment. The flowchart shown in FIG. 6 can be embodied as a program for causing a computer to execute each step. In this embodiment, the flowchart is stored as software in a memory (not shown) provided in the camera CPU 118.

  When the power switch 122 of the camera body 100 is turned on (S21), the camera CPU 118 determines whether or not the shooting mode is set to the AF mode by the shooting mode switching unit 130 (S22).

  If the AF mode is not selected, the camera CPU 118 executes processing corresponding to the other mode (S39), and returns to S2. On the other hand, if the AF mode is selected, the camera CPU 118 determines whether SW1 of the release switch 124 is ON (S3).

  If the SW1 is OFF, the camera CPU 118 returns to S2. On the other hand, if SW1 is ON, determination of the exposure amount by the photometry means 126 and AF detection by the distance measurement means 128, that is, distance measurement of a subject existing in the distance measurement area is started (S24). Then, the lens driving amount in AF is calculated based on the distance measurement result (S25), a lens driving command is transmitted to the lens CPU 210, and lens driving control is started (S26). When the lens drive control is completed and the lens stops (AF ends) (S27), the camera CPU 118 acquires the aperture value F, the position information of the second lens group 204, and the minimum circle of confusion from the lens CPU 210 (S28). ).

  In S29, the unit movement amount of the focus surface is calculated by the unit movement amount setting unit 118a from the acquired minimum confusion circle diameter and aperture value information obtained in S28. In S30, the camera CPU 118 determines whether SW2 of the release switch 124 is ON. If SW2 is ON, the shutter 108 is opened and exposure is performed (S37), the image captured by the exposure is recorded in the image recording unit 132 (S38), and the process returns to S22. On the other hand, if SW1 is OFF, the process proceeds to S31.

  In S31, the camera CPU 118 determines whether or not the manual operation unit 218 has been rotated. Whether or not the manual operation unit 208 has been rotated is determined by whether or not an output pulse has been detected by the rotation detection unit 210a. At this time, the camera CPU 118 detects the rotation direction of the manual operation unit 208 in the rotation detection unit 210a. If the manual operation unit 208 is not rotated, the camera CPU 118 cycles through S30 and S31.

  On the other hand, if the manual operation unit 208 is rotated, the camera CPU 118 detects the rotation speed of the manual operation unit 208 (S32). Here, the rotation speed of the manual operation unit 208 is calculated by the rotation speed calculation unit 118e based on the rotation amount per predetermined sampling time stored in the camera CPU 118 in advance. Information on the predetermined sampling time to be stored may be stored in the lens CPU 210 instead of the camera CPU 118.

  After calculating the rotation speed by the rotation speed calculation unit 118e, the camera CPU 118 determines a coefficient by which the unit movement amount of the focus surface is multiplied based on the rotation speed information, and calculates the unit drive amount of the second lens group 204. The unit drive amount is switched (S33). Thereafter, the camera CPU 118 determines whether or not the rotation direction of the manual operation unit (electronic ring) 208 has been changed by the rotation detection unit 210a (S34). If the rotation direction has changed, the process proceeds to S35, and if the rotation direction has not changed, the process proceeds to S36.

  In S35, the camera CPU 118 counts how much the manual operation unit (electronic ring) 208 is rotated in the rotation direction changed in S34 by the output pulse signal. Then, when the rotation direction of the manual operation unit is changed, the coefficient corresponding to the rotation speed acquired (calculated) by the rotation speed calculation unit 118e is changed.

  When the pulse count number Pout output in a predetermined sampling time after the rotation direction changes exceeds the threshold pulse value Pth, the process returns to S32. On the other hand, if the pulse count number Pout output in the predetermined sampling time does not exceed the threshold pulse value Pth, the process proceeds to S36. In S36, the camera CPU 118 returns to S34 if SW2 is OFF, and advances to S37 if SW2 is ON.

  The digital camera according to the present embodiment repeats the above operation until the power switch 122 is turned off. When the power switch 122 is turned off, the communication between the camera CPU 118 and the lens CPU 210 ends, and the power to the camera body 100 and the lens barrel 200 is turned on. Supply ends. Although not shown in the flowchart of FIG. 6, if SW1 is turned off again before SW2 is turned on in each step while SW1 is turned on, the process returns to S22.

(Effect of this embodiment)
According to this embodiment, when MF is executed after the AF focusing operation, the operation sensitivity of manual adjustment is changed according to the rotation speed and rotation amount of the electronic ring. The operability of manual focus adjustment up to the desired focus position is improved.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

118 ·· Camera CPU, 118a ·· Unit movement amount setting unit, 118b ·· Aperture value acquisition unit, 118c ·· Minimum confusion circle diameter acquisition unit, 118d ·· Driving amount conversion unit, 118e ·· Rotation speed calculation unit, 204 ..Second lens group, 208

Claims (8)

An acquisition means for acquiring an aperture value and a minimum circle of confusion;
Focusing optics corresponding to the unit operation amount of the manual operation unit in the manual focus after the completion of the autofocus, based on the aperture value and the minimum circle of confusion obtained when the autofocus is completed, acquired by the acquisition unit First setting means for setting the driving amount of the system;
An imaging device comprising: An acquisition means for acquiring an aperture value and a minimum circle of confusion;
The focus surface corresponding to the unit operation amount of the manual operation unit in the manual focus after the autofocus is completed based on the aperture value and the minimum circle of confusion obtained when the autofocus is acquired, acquired by the acquisition unit. Second setting means for setting the movement amount of
Based on the amount of movement of the focus surface corresponding to the unit operation amount set by the second setting means, the driving amount of the focusing optical system corresponding to the unit operation amount of the manual operation unit in the manual focus is set. First setting means;
An imaging device comprising:   The said 2nd setting means sets the movement amount of the focus surface corresponding to the unit operation amount of the said manual operation part as a product of the said aperture value and the said minimum circle of confusion diameter, Imaging device.   4. The imaging according to claim 1, wherein the acquisition unit includes a first acquisition unit that acquires an aperture value and a second acquisition unit that acquires a minimum circle of confusion. apparatus. Having an input means by which an operator can input coefficients;
The first setting means is based on the product of the movement amount of the focus surface corresponding to the unit operation amount of the manual operation unit set by the second setting means and the coefficient input to the input means. 4. The imaging apparatus according to claim 2, wherein a driving amount of the focusing optical system corresponding to a unit operation amount of the manual operation unit is set. Detecting means for detecting the rotation speed of the manual operation unit;
The first setting means includes a coefficient corresponding to the amount of movement of the focus surface corresponding to the unit operation amount of the manual operation unit set by the second setting means and the rotational speed detected by the detection means. 4. The imaging apparatus according to claim 2, wherein a driving amount of the focusing optical system corresponding to a unit operation amount of the manual operation unit is set based on a product.   The imaging apparatus according to claim 6, wherein when the rotation direction of the manual operation unit is changed, a coefficient corresponding to the rotation speed detected by the detection unit is changed.   An imaging apparatus capable of performing manual focus for manual focusing via a manual operation unit without switching operation after autofocusing is completed by automatically displacing the focusing optical system with respect to the imaging surface. The imaging device according to any one of claims 1 to 7.