Lens device and imaging device

Abstract

To provide a lens device of which focus range can be changed by an easy operation.SOLUTION: The lens device includes: an optical system having an optical member which can enlarge or shrink a focus range by moving; a determination unit for determining the relation between the direction of moving of the optical member and the enlarging or shrinking of the focus range; and a setting unit for setting information on the moving of the optical member by using the result of determination by the determination unit.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a lens apparatus and an imaging apparatus. [Background technology]

[0002] Conventionally, lens barrels have been proposed that enable tilt photography to adjust the in-focus range and shift photography to change the shooting angle of view and correct distortion. In tilt photography, it is possible to tilt the focal plane so as to focus well on the entire object surface tilted from a plane perpendicular to the optical axis of the imaging optical system, or to tilt the focal plane so as to focus partially. Patent Document 1 discloses an imaging device that displays the in-focus range superimposed on an image so that the in-focus range can be easily visually recognized when the image is partially in focus. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-7993 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration of Patent Document 1, when creating an image by expanding or reducing the focus range after tilting the focal plane, it is necessary to change the focus range by changing the tilt of the current focal plane. However, it is difficult to intuitively understand how to move the imaging optical system to change the focus range, so it is necessary to move the optical system once and check the change in the focus range before changing it to the desired focus range.

[0005] An object of the present invention is to provide a lens device capable of changing the focus range with a simple operation. [Means for solving the problem]

[0006] A lens device according to one aspect of the present invention is characterized in having an optical system equipped with an optical element that can expand or reduce the focal range by moving, a determination unit that determines the relationship between the movement direction of the optical element and the expansion or reduction of the focal range, and a setting unit that sets information regarding the movement of the optical element using the determination result of the determination unit. Effect of the Invention

[0007] According to the present invention, it is possible to provide a lens device capable of changing the focus range with a simple operation. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a configuration diagram of a camera system according to a first embodiment. [Diagram 2] FIG. 2 is an electrical configuration diagram of the camera system. [Diagram 3] FIG. 1 is an explanatory diagram of the Scheimpflug principle. [Figure 4] 5A to 5C are diagrams illustrating an example of an image displayed on a display unit during perspective shooting in the first embodiment. [Diagram 5] FIG. 4 is a diagram showing an example of an image with a focus range displayed on a display unit in the first embodiment. [Figure 6] FIG. 4 is a diagram showing an example of an image in which a focusing range selection means of the first embodiment is displayed. [Figure 7] FIG. 2 is a diagram showing a state in which a user selects a focusing range selection means according to the first embodiment. [Figure 8] FIG. 4 is a diagram showing an example of an image in which a focusing range changing means of the first embodiment is displayed. [Figure 9] FIG. 4 is a diagram showing a state in which a user operates a focusing range changing means according to the first embodiment. [Figure 10] 13 is a schematic diagram of an operation ring to which the functions of a TS indicator of the second embodiment are assigned. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to refer to the same components, and duplicated descriptions will be omitted. (First embodiment) 1 is a configuration diagram of a camera system 000 of this embodiment. The camera system 000 has a lens barrel (lens apparatus) 001 and a camera body (imaging apparatus) 002. The lens barrel 001 is attached to the camera body 002 via a mount 005 and a mount (not shown) of the camera body 002. Note that, in this embodiment, the lens barrel 001 is configured to be detachable from the camera body 002, but it may also be configured integrally with the camera body 002.

[0010] The camera body 002 includes a viewfinder 016, an imaging unit 1106, a display unit 1108, and a camera-side CPU 1100. The viewfinder 016 allows the user to look into it to check the captured image and input a line of sight. The display unit 1108 is a display using liquid crystal or organic electroluminescence technology, and is used to display the captured image and change various settings of the camera system 000. The camera-side CPU 1100 controls a shutter (not shown) to expose an image sensor provided in the imaging unit 1106 for any desired period of time, thereby enabling capture of an image.

[0011] The lens barrel 001 includes an optical system consisting of a first group lens 021, a second group lens 022, a third group lens 023, a fourth group lens 024, a fifth group lens 025, a sixth group lens 026, a seventh group lens 027, an eighth group lens 028, a ninth group lens 029, and a tenth group lens 030. The lens barrel 001 also includes a mount 005, a zoom ring 006, a guide barrel 007, a cam barrel 008, an aperture mechanism 011, a focus ring 019, an aperture ring 020, a vibration actuator 031, and a lens-side CPU 1000.

[0012] The lens side CPU 1000 controls the operation of each part within the lens barrel 001 .

[0013] The focal length of the lens barrel 001 changes by changing the positional relationship of each lens in a direction parallel to the optical axis 004 of the optical system. Each lens is held by a barrel equipped with a cam follower. The cam follower engages with both a straight groove parallel to the optical axis 004 of the guide barrel 007 and a groove inclined to the optical axis 004 of the cam barrel 008. When the zoom operation ring 006 rotates, the cam barrel 008 rotates. In other words, the focal length can be changed by rotating the zoom operation ring 006. The focal length of the optical system can also be detected by a zoom position detection means (not shown) that detects the amount of rotation of the zoom operation ring 006.

[0014] The second group lens 022 is a focus group that can adjust the focus by moving along the optical axis 004. The focus unit 010 is made up of a guide bar (not shown) that guides the second group lens 022 in a direction parallel to the optical axis 004, a vibration actuator 031, and a detection means (not shown) that detects the movement distance of the second group lens 022. The focus unit 010 is driven and controlled by the lens side CPU 1000.

[0015] By moving the sixth lens 026 and the eighth lens 028 in a direction perpendicular to the optical axis 004, a tilt effect for tilting the focal plane with respect to the imaging surface of the imaging element provided in the imaging unit 1106 and a shift effect for moving the imaging range can be obtained. Specifically, when the sixth lens 026 and the eighth lens 028 have the same refractive power (both have positive refractive power or both have negative refractive power), a tilt effect can be obtained in the opposite direction and a shift effect can be obtained in the same direction. When the sixth lens 026 and the eighth lens 028 have different refractive powers (one has positive refractive power and the other has negative refractive power), a shift effect can be obtained in the opposite direction and a tilt effect can be obtained in the same direction. The first shift unit 012 is composed of a holding means for holding the sixth lens 026 so as to be movable in a direction perpendicular to the optical axis 004, a driving means, and a detection means for detecting the movement distance of the sixth lens 026. Further, a second shift unit 013 is configured by a holding means for holding the eighth group lens 028 movably in a direction perpendicular to the optical axis 004, a driving means, and a detection means for detecting the movement distance of the eighth group lens 028. The first shift unit 012 and the second shift unit 013 are driven and controlled by the lens side CPU 1000.

[0016] The aperture mechanism 011 changes the aperture diameter of the optical system in response to an instruction from the lens side CPU 1000 .

[0017] 2 is an electrical configuration diagram of the camera system 000. First, the control flow inside the camera body 002 will be described. The camera side CPU 1100 is configured with a microcomputer, and controls the operation of each part inside the camera body 002. Furthermore, when the lens barrel 001 is attached, the camera side CPU 1100 communicates with the lens side CPU 1000 via the lens side electrical contacts 1009 and the camera side electrical contacts 1010. Note that the lens side electrical contacts 1009 and the camera side electrical contacts 1010 include contacts for supplying power from the camera body 002 to the lens barrel 001.

[0018] The information (signal) that the camera-side CPU 1100 transmits to the lens-side CPU 1000 includes information on the amount of drive and focus error information of the second group lens 022. Also included is attitude information of the camera body 002 based on a signal from a camera attitude detection unit 1110 such as an acceleration sensor (not shown).Further included is subject distance information of the subject based on a signal from a TS indication unit 1109 that indicates a desired subject on which the photographer wants to focus, focus error information, and shooting range information indicating a desired shooting range (field of view).

[0019] The information (signal) transmitted from the lens side CPU 1000 to the camera side CPU 1100 includes optical information such as imaging magnification, and functional information such as zoom and vibration isolation mounted on the lens barrel 001. Also, attitude information is included from a lens attitude detection unit 1008 such as a gyro sensor or an acceleration sensor.

[0020] The power switch 1101 is a switch that can be operated by the photographer, and is used to start up the camera-side CPU 1100 and to start supplying power to the actuators, sensors, etc. in the camera system 000. The release switch 1102 is a switch that can be operated by the photographer, and has a first stroke switch SW1 and a second stroke switch SW2. A signal from the release switch 1102 is input to the camera-side CPU 1100. In response to input of an ON signal from the first stroke switch SW1, the camera-side CPU 1100 enters a shooting preparation state. In the shooting preparation state, the luminance of the subject is measured by the photometry unit 1103, and focus detection is performed by the focus detection unit 1104.

[0021] The camera-side CPU 1100 calculates the aperture value of the aperture mechanism 011 and the exposure amount (shutter time) of the imaging unit 1106 based on the photometry result by the photometry unit 1103. The camera-side CPU 1100 also determines the drive amount (including the drive direction) of the second group lens 022 based on focus information (defocus amount and defocus direction) which is the detection result of the focus state of the optical system by the focus detection unit 1104. Information related to the drive amount of the second group lens 022 is transmitted to the lens-side CPU 1000.

[0022] As described above, in this embodiment, by moving the sixth lens 026 and the eighth lens 028 in directions perpendicular to the optical axis 004, a tilt effect of tilting the focal plane relative to the imaging plane and a shift effect of moving the shooting range can be obtained. The camera-side CPU 1100 calculates the tilt drive amount for focusing on a desired subject instructed by the TS instruction unit 1109. The camera-side CPU 1100 also calculates the shift drive amount for changing the current shooting range to the shooting range instructed by the TS instruction unit 1109. Information on these drive amounts is transmitted from the camera-side CPU 1100 to the lens-side CPU 1000, which controls the drive of the sixth lens 026 and the eighth lens 028.

[0023] Here, a plurality of objects may be designated by the TS designation unit 1109. Even if the objects are at different distances, it is possible to focus on them if they are on an object plane that is tilted due to the tilt effect described above.

[0024] Although the TS instruction unit 1109 is provided in the camera body 002, it may be provided in the lens barrel 001. The function of the TS instruction unit 1109 may be assigned to an existing rotary operation unit, button, switch, etc. of the lens barrel 001 or camera body 002.

[0025] Furthermore, when the camera enters a predetermined shooting mode, the camera CPU 1100 starts control of the decentering drive of the vibration-proof lens (not shown), i.e., the camera shake vibration prevention operation. If the lens barrel 001 does not have a vibration prevention function, the decentering drive control of the vibration-proof lens is not necessary.

[0026] When an ON signal is input from the second stroke switch SW2, the camera-side CPU 1100 transmits an aperture drive command to the lens-side CPU 1000, and sets the aperture mechanism 011 to a pre-calculated aperture value. The camera-side CPU 1100 also transmits an exposure start command to the exposure unit 1105, and causes it to perform a retraction operation of a mirror (not shown) (if the camera body 002 is a mirrorless camera, this operation does not occur) and an opening operation of a shutter (not shown). Then, the camera-side CPU 1100 causes an image sensor provided in the image capturing unit 1106 to perform photoelectric conversion of a subject image formed on an image capturing surface by an optical system, i.e., an exposure operation.

[0027] The imaging signal from the imaging unit 1106 is converted into a digital signal by a signal processing unit in the camera-side CPU 1100, and is then subjected to various correction processes before being output as an image signal. The image signal (data) is recorded and stored in a recording medium such as a semiconductor memory, such as a flash memory, a magnetic disk, or an optical disk by an image recording unit 1107.

[0028] An image captured by the imaging unit 1106 can be displayed on the display unit 1108 during shooting. Also, images recorded in the image recording unit 1107 can be displayed. In recent years, the display unit 1108 has been equipped with touch operation technology, making it possible to select a subject in an image captured by live view shooting and adjust the focus. In other words, a configuration in which the TS instruction unit 1109 is included in the display unit 1108 is common.

[0029] The internal control flow of the lens barrel 001 will now be described.

[0030] The focus operation rotation detection unit 1002 includes a focus operation ring 019 and a sensor (not shown) that detects the rotation of the focus operation ring 019 .

[0031] The aperture operation rotation detection unit 1011 includes the aperture operation ring 020 and a sensor (not shown) that detects the rotation of the aperture operation ring 020 .

[0032] The zoom operation rotation detection unit 1003 includes a zoom operation ring 006 and a sensor (not shown) that detects the rotation of the zoom operation ring 006 .

[0033] The object storage unit 1012 stores the spatial position in the shooting range of the object designated by the TS designation unit 1109 or the display unit 1108. The stored position is defined by the object distance and its coordinates (X, Y) with the imaging surface as the XY axis plane.

[0034] The TS operation detection unit 1001 includes a manual operation unit for obtaining a tilt / shift effect, and a sensor (not shown) for detecting the amount of operation of the manual operation unit.

[0035] The IS driver 1004 includes a drive actuator for an anti-vibration lens (not shown) that performs anti-vibration operation, and a drive circuit for the drive actuator. Note that if the lens barrel 001 does not have an anti-vibration function, this configuration is not necessary.

[0036] The AF driving unit 1006 includes a second lens group 022 that performs a focusing operation, and a focus unit 010 (ultrasonic motor unit) that moves the second lens group 022 along the optical axis 004 according to driving amount information of the second lens group 022. The driving amount information may be determined based on a signal from the camera side CPU 1100 described above, or may be determined from a signal indicating a manual focus position by operating the focus operation rotation detection unit 1002.

[0037] The electromagnetic aperture driving unit 1005 operates the aperture mechanism 011 to an open state corresponding to the specified aperture value. The electromagnetic aperture driving unit 1005 also operates in the same manner when the photographer operates the aperture operation ring 020 to specify a desired aperture value.

[0038] The TS driver 1007 performs tilt operation to obtain a desired subject plane (focus plane) using the subject distance, position information, and shooting range information acquired from the camera-side CPU 1100, and performs shift operation to obtain a desired shooting range. It goes without saying that the lens-side CPU 1000 controls the TS driver 1007 and the AF driver 1006 to operate optimally to obtain the desired focus. In addition, the lens barrel 001 of this embodiment has optical characteristics that change the focus even if the subject distance does not change due to shift operation. It goes without saying that the TS driver 1007 and the AF driver 1006 are optimally controlled in accordance with such optical characteristics.

[0039] The gyro sensor (not shown) is disposed and fixed inside the lens barrel 001, and is electrically connected to the lens-side CPU 1000. The gyro sensor detects the angular velocity of each of the vertical (pitch) and horizontal (yaw) shakes, which are angular shakes of the camera system 000, and outputs the detected values ​​as angular velocity signals to the lens-side CPU 1000. The lens-side CPU 1000 electrically or mechanically integrates the angular velocity signals in the pitch and yaw directions from the gyro sensor to calculate the pitch shake amount and yaw shake amount (collectively referred to as angular shake amount), which are the amounts of displacement in the respective directions.

[0040] The lens-side CPU 1000 controls the IS driver 1004 based on the composite displacement amount of the angular shake amount and the translational shake amount described above to shift and drive the vibration-proof lens, thereby performing angular shake correction and translational shake correction. If the lens barrel 001 does not have a vibration-proof function, this configuration is not necessary. Also, the lens-side CPU 1000 controls the AF driver 1006 based on the focus shake amount to move the second lens group 022 along the optical axis, thereby performing focus shake correction.

[0041] The lens side CPU 1000 controls the TS driver 1007 based on the shake and displacement of the lens barrel 001 calculated based on the output from the gyro sensor. For example, if camera shake occurs when taking a picture while holding the camera system 000 in one's hand, the subject plane will shift relative to the subject. However, since the subject position is stored in the subject memory unit 1012, it is possible to control the TS driver 1007 to correct the shake and keep the subject plane aligned with the subject. A signal from an acceleration sensor mounted in the camera body 002 may be used to control the TS driver 1007. The lens barrel 001 may also be equipped with an acceleration sensor.

[0042] FIG. 3 is an explanatory diagram of the Scheimpflug principle. When the optical axis of the optical system is tilted with respect to the imaging plane, the in-focus range on the subject side is determined by the Scheimpflug principle. FIG. 3(a) shows the in-focus range when the optical axis of the optical system 1201a is not tilted with respect to the imaging plane 1200a. 1202a and 1203a are the in-focus subject plane and the principal plane of the optical system 1201a, respectively. FIG. 3(b) shows the in-focus range when the optical axis of the optical system 1201b is tilted with respect to the imaging plane 1200b. 1202b and 1203b are the in-focus subject plane and the principal plane of the optical system 1201b, respectively. The Scheimpflug principle states that, as shown in FIG. 3(b), when an imaging plane 1200b and a principal plane 1203b of an optical system 1201b intersect at a point of intersection 1204b on a line, an object plane 1202b also passes through the point of intersection 1204b.

[0043] When the subject to be photographed has depth, it is possible to focus from the foreground to the background of the subject by tilting the subject plane 1202b to match the depth. When you want to focus on a deep part with a lens that does not have a tilt mechanism, it is common to narrow the aperture to deepen the depth of field, but with a tilt lens, it is possible to focus according to the depth by tilting even if the aperture is open.

[0044] In addition, by tilting the main surface 1203b of the optical system 1201b in the opposite direction to the inclination of the subject with depth, it is possible to make the subject surface 1202b intersect with the subject's depth direction at an angle close to a right angle. In this case, the in-focus range can be made extremely narrow, making it possible to capture a diorama-style image.

[0045] Alternatively, instead of tilting the optical system, the tilt θobj of the object plane 1202c may be generated as shown in Fig. 3(c) by utilizing the image plane tilt caused by decentering of the lens. However, if the Scheimpflug principle is applied to the principal plane 1203c of the optical system 1201c and the object plane 1202c in which tilt does not occur, the image plane tilt of angle θimg should occur on the imaging plane 1200c. In this case, the angle θimg may be corrected so that the object plane can be tilted without tilting the imaging plane 1200c, allowing the desired object to be focused on.

[0046] On the other hand, if a predetermined imaging surface tilt correction effect is to be ensured, the amount of decentering of the optical system 1201c increases, and the composition shift becomes large. Therefore, it is sufficient to move other lenses designed to reduce the aberration fluctuation during decentering. In this embodiment, the sixth group lens 026 and the eighth group lens 028 corresponding to the optical system 1201c are decentered.

[0047] Shooting using the tilt effect of this embodiment will be described below. Here, the shooting scene is assumed to be "diorama-style shooting" in which a landscape photo is projected like a diorama.

[0048] Fig. 4 is a diagram showing an example of an image 1300 displayed on the display unit 1108 during tilt shooting. It is assumed that the display unit 1108 includes a TS indicator 1109. Subject images 1301, 1302, and 1303 in the image 1300 are a building, a car, and a person, respectively. The focal plane is tilted around a predetermined axis as a rotation axis so that only a part of the subject image displayed on the display unit 1108 is in focus. When changing (enlarging or reducing) the width of the in-focus range (focus range) from the tilt shooting state of Fig. 4, it is necessary to change the inclination of the subject plane. In that case, it is necessary to perform decentering operation of the optical system.

[0049] 5 is a diagram showing an example of an image 1300 with a focus range display displayed on the display unit 1108 in a mode for enlarging or reducing the focus range for tilt-and-shift photography. In order to allow the current focus range to be visually confirmed, a focus range display 1304 is displayed semi-transparently in the in-focus range of the image 1300. This allows the in-focus range to be displayed distinctly from the out-of-focus range. Alternatively, only the focus range display 1304 may be displayed transparently with a semi-transparent display superimposed on the entire image 1300.

[0050] The focus detection unit 1104 generates focus information such as clarity from the image 1300, and performs focus detection of the subject images 1301, 1302, 1303, etc. The camera-side CPU 1100 acquires from the focus detection unit 1104 the change in clarity of the image 1300 when the sixth lens 026 and the eighth lens 028 are slightly decentered. Then, using the acquired result, the camera-side CPU 1100 can determine in which direction the sixth lens 026 and the eighth lens 028 should be decentered to expand or reduce the focus range. That is, the camera-side CPU 1100 functions as a determination unit that determines the relationship between the movement direction of the sixth lens 026 and the eighth lens 028 and the expansion or reduction of the focus range. The camera-side CPU 1100 can also simultaneously acquire the amount of decentering of the lenses required to change the focus range. Then, the camera side CPU 1100 can use the acquired results to associate the movement direction and movement amount of the lens with the enlargement or reduction instruction and the change amount instruction issued by the user. That is, the camera side CPU 1100 functions as a setting unit that sets information regarding the movement of the sixth group lens 026 and the eighth group lens 028. Specifically, the camera side CPU 1100 acquires information regarding the operation of the focus range selection means (selection unit) 1305 and the focus range change means (operation unit) 1306, which will be described later. That is, the camera side CPU 1100 functions as an acquisition unit that acquires information regarding the operation unit. Then, when the focus range selection means 1305 selects to expand the focus range, the camera side CPU 1100 sets the movement direction of the sixth group lens 026 and the eighth group lens 028 when the focus range change means 1306 is operated so as to be the direction in which the focus range is expanded. In addition, when the focus range selection means 1305 selects to reduce the focus range, the camera side CPU 1100 sets the direction of movement of the sixth group lens 026 and the eighth group lens 028 when an operation is performed on the focus range change means 1306 to be the direction that reduces the focus range.

[0051] In this embodiment, the camera-side CPU 1100 functions as a determination section, a setting section, and an acquisition section, but the lens-side CPU 1000 may function as each section.

[0052] 6 is a diagram showing an example of an image 1300 in which the focus range selection means 1305 is displayed after determination of the relationship between the movement directions of the sixth group lens 026 and the eighth group lens 028 and the enlargement / reduction of the focus range has been completed. Two types of focus range selection means 1305 for enlarging and reducing the focus range are displayed in the image 1300. The focus range selection means 1305 is associated with the determination result by the camera-side CPU 1100.

[0053] Fig. 7 is a diagram showing a state in which a user selects a focusing range selection means 1305. The display unit 1108 has a touch operation function, and when a user selects one of the focusing range selection means 1305 by touching the display unit 1108, the selected selection result is transmitted to the camera-side CPU 1100. In Fig. 7, reduction has been selected. Since the lens movement direction when reducing the focusing range is linked based on the above-mentioned determination result, a movement instruction in a specified lens movement direction is issued via the lens-side CPU 1000.

[0054] FIG. 8 is a diagram showing an example of an image 1300 on which the focus range changing means 1306 is displayed. FIG. 9 is a diagram showing a state in which a user is operating the focus range changing means 1306. By operating the focus range changing means 1306, the user can specify the amount of change in the focus range. The focus range display 1304 changes in response to the operation of the focus range changing means 1306, and the user can specify a desired focus range. An instruction signal from the focus range changing means 1306 is transmitted to the camera-side CPU 1100. Since the required lens movement amount is linked to the instruction of the amount of change in the focus range based on the above-mentioned determination result, a movement instruction for a specified lens movement amount is issued via the lens-side CPU 1000.

[0055] With the above-described configuration, the user can expand or reduce the focusing range during tilt shooting without considering the direction of decentering movement of the sixth lens group 026 and the eighth lens group 028 or the direction of inclination of the subject plane 1202c.

[0056] In the present embodiment, the focus range selection unit 1305 and the focus range change unit 1306 are operated by different actions, but the present invention is not limited to this.

[0057] For example, a case will be described in which the focus range is expanded or reduced by moving the sixth lens 026 and the eighth lens 028 using one operation unit that simultaneously performs the functions of the focus range selection unit 1305 and the focus range change unit 1306. In this case, the camera-side CPU 1100 first acquires information about the operation unit that is configured, for example, to expand the focus range with a first operation and to reduce the focus range with a second operation. Then, the camera-side CPU 1100 sets the movement direction of the sixth lens 026 and the eighth lens 028 when the first operation is performed on the operation unit to be a direction that expands the focus range. Also, the camera-side CPU 1100 sets the movement direction of the sixth lens 026 and the eighth lens 028 when the second operation is performed on the operation unit to be a direction that reduces the focus range. Here, the operation unit may be a button, a switch, a rotating ring, or a touch panel provided on the lens barrel 001 or the camera body 002, or may be an external device different from the camera system 000. For example, when the operation unit is a button, the first operation is ON of a button indicating enlargement, and the second operation is ON of a button indicating reduction. In this case, the movement amount of the sixth lens group 026 and the eighth lens group 028 may be increased in proportion to the ON time. When the operation unit is a switch capable of selecting between enlargement and reduction, the first operation is selection of enlargement, and the second operation is selection of reduction. In this case, the movement amount of the sixth lens group 026 and the eighth lens group 028 may be increased in proportion to the selection time. When the operation unit is a rotating ring, the first operation is rotation in a first rotation direction, and the second operation is rotation in a second rotation direction opposite to the rotation in the first rotation direction. In this case, the rotation amount may be configured to correspond to the movement amount of the sixth lens group 026 and the eighth lens group 028. When the operation unit is a touch panel and can be instructed using a bar configured such that an operation to the first end is enlargement and an operation to the second end is reduction, the first operation is an operation in a first direction, and the second operation is an operation in a second direction opposite to the first direction. In this case, the distance from the reference position of the bar to the operation position may be configured to correspond to the amount of movement of the sixth lens group 026 or the eighth lens group 028.Furthermore, if the touch panel supports a multi-touch system capable of simultaneously detecting contact with a plurality of fingers or the like, the first operation may be a pinch out and the second operation may be a pinch in. Second embodiment In this embodiment, only the configuration different from the first embodiment will be described, and the description of the configuration common to the first embodiment will be omitted.

[0058] In the first embodiment, a change in clarity of the image 1300 is taken as an example of a determination method, but in this embodiment, another determination method is used.

[0059] The camera system 000 of this embodiment has a distance measurement sensor that measures the distance to a subject to obtain distance information, and a focus error detection unit that detects the amount of focus error from the position of the output waveform from the distance measurement sensor. Based on the amount of focus error detected by the focus error detection unit, it is possible to determine in which direction the sixth group lens 026 and the eighth group lens 028 should be decentered to expand or reduce the focus range. In addition, the amount of lens decentering required to change the focus range can be obtained at the same time. Then, based on the result, the direction and amount of lens movement can be linked to the user's instruction to enlarge or reduce and the amount of change.

[0060] In this embodiment, the aperture operation ring 020 functions as an operation ring 1400 to which a user can assign any function. This makes it possible to assign the function of the TS instruction unit 1109 to the operation ring 1400.

[0061] 10 is a schematic diagram of an operation ring 1400 to which the function of the TS instruction unit 1109 of this embodiment is assigned. The operation ring 1400 is used to select enlarging or reducing the focus range. Specifically, when viewed from the camera body 002 side (image side), the user rotates the operation ring 1400 in a clockwise direction 1401 around the optical axis 004 as the central axis to instruct enlarging the focus range, and rotates it in a counterclockwise direction 1402 to instruct reducing the focus range. Also, the amount of change in the focus range can be specified by the amount of rotation of the operation ring 1400.

[0062] In this embodiment, it is possible to determine the relationship between the movement direction of the tilt optical member and the enlargement or reduction of the focusing range without minute lens movement compared to the first embodiment.

[0063] With the above-described configuration, the user can expand or reduce the focusing range during tilt shooting without considering the direction of decentering movement of the sixth lens group 026 and the eighth lens group 028 or the direction of inclination of the subject plane 1202c.

[0064] In this embodiment, an example has been described in which the function of the TS instruction unit 1109 is assigned to the operation ring 1400, but the present invention is not limited to this. The function of the TS instruction unit 1109 may be assigned to an operation ring, button, or dial mounted on the lens barrel 001 or the camera body 002, or a dedicated operation unit having the function of the TS instruction unit 1109 may be provided. A separate operation device capable of communicating with the camera system 000 may also have the function of the TS instruction unit 1109.

[0065] The disclosure of this embodiment includes the following configuration.

[0066] (Configuration 1) an optical system including an optical member that can expand or reduce a focusing range by moving; a determination unit that determines a relationship between a moving direction of the optical member and an enlargement or reduction of the focusing range; a setting unit that sets information regarding movement of the optical member using a result of the determination by the determination unit. (Configuration 2) an acquisition unit that acquires information regarding an operation performed on an operation unit that expands the focusing range in response to a first operation and reduces the focusing range in response to a second operation; The lens device described in configuration 1, characterized in that the setting unit uses the judgment result of the judgment unit to set the movement direction of the optical element when the first operation is performed on the operation unit to a direction that expands the focus range, and sets the movement direction of the optical element when the second operation is performed on the operation unit to a direction that reduces the focus range. (Configuration 3) an acquisition unit that acquires information regarding an operation on a selection unit for selecting an enlargement or reduction of the focusing range, and information regarding an operation on an operation unit that changes the focusing range in response to the operation, The lens device described in configuration 1, characterized in that when the selection unit selects to expand the focus range, the setting unit sets the direction of movement of the optical member when an operation is performed on the operation unit to be a direction that expands the focus range, and when the selection unit selects to reduce the focus range, the setting unit sets the direction of movement of the optical member when an operation is performed on the operation unit to be a direction that reduces the focus range. (Configuration 4) The optical system further includes a focus detection unit that detects the focus of a subject image formed by the optical system, The lens device according to any one of configurations 1 to 3, wherein the determination unit determines the relationship between the movement direction of the optical member and the expansion / contraction of the focus range based on a result of focus detection by the focus detection unit. (Configuration 5) The camera further includes a focus shift detection unit that detects a focus shift amount in a shooting range based on distance information to a subject, The lens device described in any one of configurations 1 to 3, characterized in that the determination unit determines the relationship between the movement direction of the optical member and the expansion / contraction of the focus range based on the amount of focus shift detected by the shift detection unit. (Configuration 6) The focusing range changes in response to rotation of the focal plane; 6. The lens device according to any one of configurations 1 to 5, wherein an axis of rotation of the focal plane is determined in advance. (Configuration 7) 7. The lens device according to any one of configurations 1 to 6, wherein the optical member includes an optical member that moves to tilt a focal plane with respect to an imaging plane of an imaging element. (Configuration 8) a determination unit that determines a relationship between a moving direction of an optical member capable of expanding or contracting a focusing range by moving the optical member and the expansion or contraction of the focusing range; an imaging device comprising: a setting unit that sets information regarding movement of the optical member using a determination result from the determination unit;

[0067] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0068] 001 Lens barrel (lens device) 1000 Lens side CPU (judging section, setting section)

Claims

1. An optical member that can be moved when expanding or contracting the focusing range, A determination unit that determines whether the focusing range expands or contracts with respect to the movement direction of the optical element, A lens device characterized by having a setting unit that sets the movement of the optical member based on the result of the determination.

2. The lens device according to claim 1, characterized in that the setting unit sets the direction of movement of the optical member in accordance with the operation by the user based on the result of the determination.

3. The lens device according to claim 2, characterized in that the setting unit sets the direction of movement of the optical member to expand the focusing range when the first operation is performed by the user based on the result of the determination, and sets the direction of movement of the optical member to reduce the focusing range when the second operation is performed by the user.

4. Further comprising a detection unit for performing focus detection, The lens device according to any one of claims 1 to 3, characterized in that the determination unit performs the determination based on the result of the focus detection.

5. It further includes a detection unit that detects the amount of focus shift based on distance information to the subject, The lens device according to any one of claims 1 to 3, characterized in that the determination unit performs the determination based on the detection result.

6. The lens device according to any one of claims 1 to 3, characterized in that the focusing range changes in accordance with the rotation of the focal plane.

7. The lens device according to any one of claims 1 to 3, characterized in that the optical member is movable when changing at least one of the tilt effect, which inclins the focal plane with respect to the imaging plane, and the shift effect, which moves the shooting range.

8. The lens device according to any one of claims 1 to 3, characterized in that the optical member is movable in a direction perpendicular to the optical axis.

9. The lens device according to any one of claims 1 to 3, characterized in that it is detachable from the imaging device.

10. An image sensor that performs imaging via a lens device having an optical member that can be moved when expanding or contracting the focusing range, A determination unit that determines whether the focusing range expands or contracts with respect to the movement direction of the optical element, An imaging apparatus characterized by having a setting unit that sets the movement of the optical member based on the result of the determination.

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