JP6009383B2 - Mount adapter - Google Patents

Description

  The present invention relates to a mount adapter used for an interchangeable lens camera.

  In order to attach an interchangeable lens for a camera of one standard to a camera body of another standard, it has been proposed to interpose an adapter between the camera body and the interchangeable lens for a camera (Patent Documents 1 to 3). ). Referring to mirrorless single-lens cameras that have become popular in recent years, since the flange back differs between existing single-lens reflex cameras and mirrorless single-lens cameras that have been popular recently, interchangeable lenses for single-lens reflex cameras are used as mirrorless single-lens cameras. It cannot be used as it is. Therefore, the flange back can be adjusted by interposing a mount adapter between the mirrorless single-lens camera and the interchangeable lens for a single-lens reflex camera. Interchangeable lenses for single-lens reflex cameras can be used for mirrorless single-lens cameras.

JP 59-156234 A JP-A-5-91384 JP 2010-152140 A

  Patent Documents 1 and 2 also describe a method in which a color temperature conversion filter and an ND filter are inserted into and removed from the optical path in the adapter.

  However, in both Patent Documents 1 and 2, the color temperature conversion filter and the ND filter are rotated and slid around an axis provided in parallel with the optical axis. In order to rotate and slide the color temperature conversion filter and the ND filter around an axis parallel to the optical axis, a relatively wide space is required in the adapter, and it is particularly difficult to reduce the size of the adapter in the diameter direction.

  It is an object of the present invention to be able to cope with a reduction in the diameter direction of a mount adapter that realizes insertion and removal of a filter in an optical path.

  The mount adapter according to the present invention is detachably provided between the camera body and the interchangeable lens unit between the camera body and the interchangeable lens unit. The mount adapter is provided in the mount adapter from the interchangeable lens unit. An optical filter that changes an optical characteristic of light directed toward the camera body, and a first rotation shaft that is provided at a position off the optical path of the light and rotates about an axis perpendicular to the optical axis of the light. And an optical filter rotation mechanism for inserting and removing the optical filter from the optical path of the light by rotating the optical filter around the first rotation axis.

  According to the present invention, in the mount adapter, the optical filter is inserted from the optical path by rotating around the first rotation axis provided perpendicular to the optical axis (rotating clockwise and counterclockwise). Since it is removed (in and out), a space in the direction of the optical axis is required, but a space in a direction perpendicular to the optical axis, that is, a direction corresponding to the diameter direction of the mount adapter is relatively not required. It is possible to cope with a reduction in the size of the mount adapter in the diameter direction.

  In one embodiment, the optical filter is provided to be rotatable about the first rotation shaft. In another embodiment, the optical filter rotating mechanism includes a rotating conveyor that is driven by the rotation of the first rotating shaft, and the optical filter is provided on the rotating conveyor. In any aspect, the first rotation axis is provided in a direction perpendicular to the optical axis, and the optical filter rotates around the first rotation axis, so that the space in the diameter direction of the mount adapter is relatively required. Not.

  A plurality of the first rotation shafts may be provided in the mount adapter, and an optical filter may be provided on each of the plurality of first rotation shafts. A plurality of optical filters may be provided on the rotating conveyor. A plurality of optical filters can be selectively inserted into and removed from the optical path.

  Preferably, the optical filter is automatically rotated and positioned. That is, the optical filter rotation mechanism includes a rotation drive device that rotates the optical filter to a predetermined rotation angular position and fixes the optical filter at the angular position in response to a given command.

  In one embodiment, the optical filter rotation mechanism includes a first rotation for positioning the optical filter in the optical path with a light incident surface of the optical filter oriented in a direction perpendicular to the optical axis of the light. Between the angular position and the second rotational angular position where the optical filter is positioned outside the optical path with the light incident surface of the optical filter oriented in a direction parallel to the optical axis of the light. The filter is driven to rotate. The optical filter rotates within an angle range of 90 degrees.

  In another embodiment, the optical filter rotating mechanism is a first circuit for positioning the optical filter in the optical path with the light incident surface of the optical filter oriented in a direction perpendicular to the optical axis of the light. The optical filter is rotated between a movement angle position and a second rotation angle position that rotates the optical filter more than 90 degrees from the first rotation angle position and positions the optical filter outside the optical path. It is to be driven dynamically. When the optical filter is rotated within an angular range exceeding 90 degrees and is rotated outside the optical path by rotating the optical filter to a second rotation angle position not parallel to the optical axis (second The reflected light from the optical filter (when in the rotation angle position) is prevented from exiting outside (particularly, entering the camera body).

  When the optical filter is rotated in an angle range exceeding 90 degrees, it is preferably provided in the mount adapter at a position off the optical path and rotated about an axis perpendicular to the optical axis of the light. A second rotation shaft, and a light reflection preventing member provided rotatably about the second rotation shaft, and when the optical filter is at the second rotation angle position, The light reflection preventing member is further provided with a light reflection preventing member rotating mechanism that covers the optical filter with the light reflection preventing member and rotates the light reflection preventing member so that the light reflection preventing member is positioned outside the optical path. Since the optical filter when located outside the optical path is covered with the light reflection preventing member, the reflected light from the optical filter when located outside the optical path can be almost certainly prevented.

  When the interchangeable lens unit is not attached to the mount adapter, the light reflection preventing member rotation mechanism is in a rotation drive position where the surface portion of the light reflection prevention member faces in a direction perpendicular to the optical axis of the light. The light reflection preventing member may be rotationally driven. Since the opening of the mount adapter is approximately closed by the surface portion of the light reflection preventing member, it is possible to prevent dust from entering.

  Preferably, the mount adapter includes a first lens member that narrows an optical path of light incident on the optical filter and a second lens member that widens an optical path of light emitted from the optical filter. Since the optical path of the light in the mount adapter between the first lens and the second lens is narrowed, the optical filter rotating mechanism (first rotating shaft and optical filter) can be reduced in size. It is possible to cope with further downsizing of the mount adapter in the diameter direction.

  Preferably, the mount adapter includes a power receiving unit that receives power from the camera body, a memory that stores filter information of the optical filter, and a drive control unit that rotationally drives the optical filter in response to an instruction from the camera body. And a transmission unit for transmitting filter information of the optical filter stored in the memory to the camera body. In the camera body, the type of filter provided in the mount adapter can be grasped, and the type of filter to be used can be selected using the camera body.

The external appearance of a camera system is shown. It is a longitudinal cross-sectional view of the mount adapter of 1st Example. It is a longitudinal cross-sectional view of the mount adapter of 2nd Example. It is a longitudinal cross-sectional view of the mount adapter of 3rd Example. It is a longitudinal cross-sectional view of the mount adapter of 4th Example. The arrangement | positioning of the four rotating shafts provided in the mount adapter of the modification of 4th Example is shown. It is a longitudinal cross-sectional view of the mount adapter of 5th Example. It is a longitudinal cross-sectional view of the mount adapter of 6th Example. It is a longitudinal cross-sectional view of the mount adapter of 7th Example. It is a flowchart which shows the flow of the setting process of the filter member by a camera main body.

  FIG. 1 schematically shows the appearance of a camera system 1 according to the first embodiment.

  The camera system 1 includes a camera body 2 including an image sensor (CCD, CMOS, etc.) 11, a shutter 12, etc., a mount adapter 3A, and an interchangeable lens unit 4 including a plurality of lenses 5. The camera body 2 is, for example, a mirrorless digital single lens camera. On the other hand, the interchangeable lens unit 4 is an interchangeable lens unit for a digital single lens reflex camera. The flange back of the mirrorless digital single-lens camera is shorter than the flange back of the digital single-lens reflex camera, and a mount adapter 3A is provided between the camera body 2 and the interchangeable lens unit 4 for the purpose of adjusting the flange back. As a result, the flange back is adjusted to the flange back of the digital single-lens reflex camera. The mount adapter 3A is detachable from the camera body 2 and the interchangeable lens unit 4. By using the mount adapter 3A, various interchangeable lens units 4 for digital single-lens reflex cameras can be used for mirrorless digital single-lens cameras.

  FIG. 2 schematically shows a longitudinal section of the mount adapter 3A.

  The external shape of the mount adapter 3A is cylindrical, and a cylindrical space 20 is also formed inside thereof. The front (right side in FIG. 2) end and the rear (left side in FIG. 2) end of the cylindrical space 20 are opened in a circular shape. The light that has passed through the interchangeable lens unit 4 enters the cylindrical space 20 from the front opening 21 of the mount adapter 3A, enters the camera body 2 through the rear opening 22. The diameter of the front opening 21 and the diameter of the rear opening 22 are substantially equal, and these diameters are slightly smaller than the cross-sectional diameter of the cylindrical space 20. A range in which light passes through the cylindrical space 20 in the mount adapter 3A is referred to as an optical path P.

  An engagement groove 23A is formed at the rear end of the mount adapter 3A, and the camera body 2 is detachably attached to the mount adapter 3A using the engagement groove 23A. An engagement protrusion 23B is formed at the front end of the mount adapter 3A, and the interchangeable lens unit 4 is detachably attached to the mount adapter 3A using the engagement protrusion 23B.

  In the upper space outside the optical path P in the cylindrical space 20 of the mount adapter 3A (the place away from the optical path P), it is provided in the direction perpendicular to the optical axis L near the rear opening 22 to which the camera body 2 is connected. The rotating shaft 24 is rotatably provided, and one side portion of the filter member 25 is fixed to the rotating shaft 24. The filter member 25 is a thin flat plate having a surface portion having a size exceeding the optical path P. The shape of the surface portion (the shape when the filter member 25 is viewed from the front) may be square, or a part thereof may be circular or elliptical. The filter member 25 changes the optical characteristics of light incident on one surface portion (light incident surface), and emits light with the changed optical properties from the other surface portion (light output surface). ) Filter, color temperature conversion (LB) filter, polarization (PL) filter, and the like.

  The rotating shaft 24 is supported inside the mount adapter 3A via a bearing (not shown) so as to be capable of forward rotation (clockwise rotation) and reverse rotation (counterclockwise rotation). The rotating shaft 24 is connected to a motor shaft of a small stepping motor 51 that is provided in a space outside the optical path P of the cylindrical space 20 and can rotate forward and backward, for example, via a gear (not shown). The stepping motor 51 rotates as the motor shaft rotates, and the filter member 25 rotates forward and backward about the rotation shaft 24 in response to this rotation, and reaches a predetermined rotation angle position. Positioned.

  In the first embodiment, the surface portion (light incident surface and light exit surface) of the filter member 25 is perpendicular to the optical axis L, and in this state, the first rotation angle position where the filter member 25 completely enters the optical path P. When the filter member 25 is in the first rotation angle position in FIG. 2 (shown by a solid line), the surface of the filter member 25 is parallel to the optical axis L, and the entire filter member 25 is outside the optical path P. The filter member 25 rotates between the second rotation angle position (the filter member 25 in the second rotation angle position in FIG. 2 is indicated by a broken line) and the first rotation. It is fixed at the angular position and the second rotational angular position.

  When the filter member 25 is at the first rotation angle position (solid line), the light passing through the mount adapter 3A passes through the filter member 25. Light that has been dimmed, converted by color temperature, polarized, etc. by the filter member 25 is incident on the camera body 2. On the other hand, when the filter member 25 is in the second rotation angle position (broken line), the filter member 25 is outside the optical path P, so that the light passing through the mount adapter 3A does not pass through the filter member 25 but the camera body. 2 is incident.

  Whether the filter member 25 is positioned at the first rotation angle position or the second rotation angle position (that is, on / off control of the filter member 25) is provided by providing a switch in the mount adapter 3A. May be switched by the user's operation, or drive control may be performed from the camera body 2. Details of the case where drive control is performed from the camera body 2 will be described later.

  FIG. 3 shows a mount adapter 3B of the second embodiment, and shows a longitudinal sectional view of the mount adapter 3B. The same members as those of the mount adapter 3A of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the following embodiments, for convenience of illustration, the illustration of the motor 51 for rotating the rotation shaft is omitted, but in any embodiment, the motor for rotating the rotation shaft is provided in the mount adapter. It is done.

  The mount adapter 3B differs from the mount adapter 3A of the first embodiment (FIG. 2) in the rotation range of the filter member 25. That is, in the second embodiment, the filter member 25 has a first rotation angle position (with the surface portions (light incident surface and light exit surface) perpendicular to the optical axis L and the filter member 25 enters the optical path P ( In FIG. 3, the filter member 25 at the first rotation angle position is indicated by a broken line), and the second rotation member is rotated beyond 90 degrees from the first rotation angle position and is located outside the optical path P. (See FIG. 3, the filter member 25 when in the second rotation angle position is indicated by a solid line). When the filter member 25 is in the second rotation angle position, the surface portion of the filter member 25 is inclined with respect to the optical axis L, so that the light reflected by the filter member 25 is the camera body 2 (the image pickup element 11). It is suppressed that the light enters.

  FIG. 4 shows a mount adapter 3C of the third embodiment, and shows a longitudinal sectional view of the mount adapter 3C. The mount adapter 3B of the second embodiment shown in FIG. 3 is an optical axis L in the upper space outside the optical path P in the cylindrical space 20 of the mount adapter 3C near the front opening 21 to which the interchangeable lens unit 4 is mounted. Is different in that a rotating shaft 26 is provided in a direction perpendicular to the rotating shaft 26 and a cover member 27 having one side fixed to the rotating shaft 26 is provided. The rotating shaft 26 is also connected via a gear to a motor shaft of a small stepping motor (not shown) provided in a space outside the optical path P of the cylindrical space 20 and capable of forward and reverse rotation. As the motor shaft of the stepping motor rotates, the cover member 27 rotates forward and backward about the rotation shaft 26 and is positioned at a predetermined rotation angle position.

  A light reflection preventing film is formed on the surface of the cover member 27. Light incident on the cover member 27 is absorbed by the light reflection preventing film, and light reflection from the cover member 27 is prevented.

  When the filter member 25 is positioned at the second rotation angle position and is located outside the optical path P (solid line), that is, when the filter member 25 is not used, the surface of the cover member 27 has an optical axis. Rotate to a rotation angle position substantially parallel to L. At this time, the cover member 27 is located outside the optical path P, and the filter member 25 is substantially covered by the cover member 27. Since no light enters the filter member 25, the reflected light from the filter member 25 is prevented from entering the camera body 2 (the image pickup element 11).

  When the filter member 25 is moved from the second rotation angle position (solid line) to the first rotation angle position (broken line) and positioned in the optical path P, the cover member 27 first has the surface portion of the optical axis L. Is moved to an angular position that is substantially perpendicular to (a broken line), and then the filter member 25 is moved from the second rotation angle position (solid line) to the first rotation angle position (broken line) to be positioned in the optical path P. Let Next, the cover member 27 is returned to the original position (rotational angle position where the surface portion is substantially parallel to the optical axis L) (solid line).

  When the interchangeable lens unit 4 is not attached to the mount adapter 3C, the cover member 27 may be moved to a rotation angle position (broken line) where the surface portion is substantially perpendicular to the optical axis L. Since the front opening 21 of the mount adapter 3C is substantially closed by the cover member 27, it is possible to suppress the entry of dust into the mount adapter 3C.

  FIG. 5 shows a mount adapter 3D of the fourth embodiment. The mount adapter 3A shown in FIG. 2 has a rotating shaft 24b extending perpendicularly to the optical axis L not only in the outer space above the optical path P in the cylindrical space 20 of the mount adapter 3D but also in the lower space outside the optical path P. The difference is that the filter member 25b is also fixed to the rotating shaft 24b.

  The rotating shaft 24b is also rotated by a motor (not shown) provided in the cylindrical space 20 of the mount adapter 3D, whereby the filter member 25b is also in the first rotation angle position (solid line) and the second rotation angle position. It rotates around the rotation shaft 24b between the broken lines. The filter members 25a and 25b are independently rotated. Only the filter member 25a is positioned at the first rotation angle position (solid line), and the filter member 25b is positioned at the second rotation angle position (broken line), so that only the filter member 25a is positioned in the optical path P. Or vice versa. As shown in FIG. 5, both filter members 25a and 25b can be positioned at the first rotation angle position (solid line), and both filter members 25a and 25b can be positioned in the optical path P.

  It is also possible to provide three or four filter members in the cylindrical space 20 of the mount adapter 3D. Referring to FIG. 6, FIG. 6 shows the positional relationship between the four rotation shafts 24a, 24b, 24c and 24d and the optical path P when four filter members are provided on the mount adapter 3D. Rotation axes 24a and 24b are respectively provided in the outer upper space and the outer lower space of the optical path P in the same way as in FIG. 24c and 24d are respectively provided (the filter member is not shown). As shown in FIG. 6, four rotating shafts 24a to 24d are provided perpendicularly to the optical axis L in the upper, lower, left and right spaces of the optical path P, and the four rotating shafts 24a to 24d are arranged. By fixing the filter member to each, each of the four filter members or a plurality (two to four) of the four filter members can be selectively positioned in the optical path P.

  FIG. 7 shows a mount adapter 3E of the fifth embodiment, and shows a longitudinal sectional view of the mount adapter 3E. The mount adapter 3A (FIG. 2) of the first embodiment is different from the mount adapter 3E in that a pair of lenses 28 and 29 are provided on the front end portion and the rear end portion of the mount adapter 3E. The difference is that the size (dimension) is small.

  Of the pair of lenses 28 and 29, the lens 28 provided at the front end of the mount adapter 3E is a reduction lens for reducing the optical path diameter, and the lens 29 provided at the rear end of the mount adapter 3E is It is a magnifying lens that enlarges the optical path diameter. Since the optical path diameter is reduced by the reduction lens 28, the optical path P passing through the cylindrical space 20 of the mount adapter 3E is narrowed. For this reason, a filter member 25 having a small size can be used as the filter member 25 inserted into and removed from the optical path P. The light whose optical characteristics have been changed by the filter member 25 is enlarged by the magnifying lens 29 and emitted toward the camera body 2.

  FIG. 8 shows a mount adapter 3F of the sixth embodiment, and shows a longitudinal sectional view of the mount adapter 3F. In the mount adapter 3E of the fifth embodiment shown in FIG. 7, the reduction lenses 28A and 29A provided at the front and rear ends of the mount adapter 3F are thick, and the range of the optical path P is further narrowed. And a rotating mechanism for rotating the filter member is different.

  In the upper space outside the optical path P in the cylindrical space 20 of the mount adapter 3F, two rotation shafts 24a and 24b perpendicular to the optical axis L are provided to be rotatable at intervals in the vertical direction. An annular conveyor belt 31 is hung on these two rotating shafts 24a and 24b. One or both of the rotation shafts 24a and 24b are connected to a motor shaft of a motor (not shown), and the conveyor belt 31 is driven by the rotation of the motor shaft.

  Six filter members 25a to 25f are fixed to the conveyor belt 31 so as to protrude outward at equal intervals. When the conveyor belt 31 is driven, the filter members 25a to 25f rotate around the rotation shafts 24a and 24b, and one of the six filter members 25a to 25f can be positioned in the optical path P. . Various optical characteristics can be given by providing the six filter members 25a to 25f having different optical characteristics.

  FIG. 9 shows a mount adapter 3G of the seventh embodiment, and shows a longitudinal section of the mount adapter 3G attached to the camera body 2.

  The mount adapter 3G is attached to the camera body 2 by fitting the mount portion 14 on the front surface of the camera body 2 into the engagement groove (mount portion) 23A of the mount adapter 3G. An annular contact step 38 is formed at the front end of the mount adapter 3G, and a plurality of contact terminals 39 (only one contact terminal 39 is shown in FIG. 9) is provided at the tip of the contact step 38. The contact terminal 39 is connected via a signal line 36 to a substrate 37 provided in the cylindrical space 20 in the mount adapter 3G.

  On the other hand, a plurality of contact terminals 13 are also provided on the front surface of the camera body 2 (in FIG. 9, only one contact terminal 13 is indicated by a broken line). When the mount adapter 3G is attached to the camera body 2, the plurality of contact terminals 13 of the camera body 2 and the plurality of contact terminals 39 of the mount adapter 3G are in electrical contact with each other.

  The substrate 37 is provided on the substrate 37, a motor drive circuit (not shown) for driving the above-described stepping motor, a memory (not shown) that stores parameters indicating the type of the filter member 25 and optical characteristics of the filter member 25, and the like. And a processing device (not shown) for controlling the electronic circuit and the memory. When the contact terminal 13 of the camera body 2 and the contact terminal 39 of the mount adapter 3G are in electrical contact, power is supplied from the camera body 2 to the substrate 37 (electronic circuit, memory, etc. on the substrate 37), the camera body 2 The data signal is transmitted from the mount adapter 3G to the mount adapter 3G, the data signal is transmitted from the mount adapter 3G to the camera body 2, and the like.

  FIG. 10 shows a mount by the camera body 2 in the embodiment in which the camera body 2 and the mount adapter 3G are electrically connected by the contact terminal 13 on the camera body 2 side and the contact terminal 39 on the mount adapter 3G side shown in FIG. It is a flowchart which shows the flow of control processing of adapter 3G.

  First, it is determined whether or not the mount adapter 3G is attached (step 41). If the mount adapter 3G is not attached, the camera body 2 does not naturally control the mount adapter 3G (NO in step 41).

  When the mount adapter 3G is attached to the camera body 2, the filter information of the filter member 25 mounted on the mount adapter 3G, for example, the filter type (a neutral density filter, a color temperature filter, a polarization filter, Parameters indicating optical characteristics (for example, values indicating the degree of attenuation such as ND2, ND4, and ND8 in the case of a neutral density filter) are read from a memory provided on the substrate 37 of the mount adapter 3G. And received by the camera body 2 (YES in step 41, step 42). Of course, if the mount adapter is provided with a plurality of filter members, the camera body 2 receives the filter type, parameters indicating the optical characteristics, etc. for each of the plurality of filter members.

  A mount adapter menu (not shown) is displayed on a display device provided in the camera body 2, and whether or not the filter member 25 is used is selected by the user from the displayed menu. If the mount adapter includes a plurality of filter members, it is also selected which of the filter members is used (steps 43 and 44).

  Data indicating whether or not the filter member 25 is used or data (filter specifying data) for specifying one filter member among the plurality of filter members if the mount adapter includes a plurality of filter members is received from the camera body 2. In response to this, the mount adapter 3G rotates the filter member 25 and positions the filter member 25 at the first rotation angle position (in the optical path P) (steps 45 and 46). Of course, on the contrary, the filter member 25 can be rotated to the second rotation angle position (outside the optical path P).

  Data representing whether or not the filter member 25 is used is transmitted from the camera body 2 to the mount adapter 3G in conjunction with various settings and detection values in the camera body 2 instead of or in addition to the above-described instruction by the user. It may be. For example, when a specific shooting scene is selected in the camera body 2 in conjunction with the type of shooting scene (manual scene, portrait scene, backlight scene, etc.) selected manually or automatically in the camera body 2, Data representing an instruction to use the filter member 25 is transmitted from the main body 2 to the mount adapter 3G. Data representing an instruction to use the filter member 25 may be transmitted from the camera body 2 to the mount adapter 3G when the photographing parameter (for example, exposure value) exceeds a predetermined threshold. On / off control of the filter member 25 according to the shooting environment of the subject is realized. In the same manner as described above, data specifying the filter member transmitted from the camera body 2 to the mount adapter when the mount adapter includes a plurality of filter members is linked to various settings and detection values in the camera body 2. Then, it may be transmitted from the camera body 2 to the mount adapter 3G.

1 Camera system 2 Camera body 3A, 3B, 3C, 3D, 3E, 3F, 3G Mount adapter 4 Interchangeable lens unit
24, 24a, 24b, 24c, 24d, 26 Rotating shaft
25, 25a, 25b, 25c, 25d, 25e, 25f Filter members
28, 28A reduction lens
29, 29A Magnifying lens
37 Board
39 Contact terminal
51 Motor P Optical path L Optical axis

Claims (7)

A mount adapter provided between the camera body and the interchangeable lens unit so as to be detachable from each of the camera body and the interchangeable lens unit,
An optical filter that changes the optical characteristics of light from the interchangeable lens unit toward the camera body and a position off the optical path of the light are provided in the mount adapter and centered on an axis perpendicular to the optical axis of the light. to include a first rotation shaft of the plurality of pivoting, the plurality of first said optical filter centered rotatably provided to the first pivot axis to the respective rotation axes of the An optical filter rotation mechanism is provided for rotating the optical filter to and from the optical path of the light by rotating the optical filter.
Mount adapter. A mount adapter provided between the camera body and the interchangeable lens unit so as to be detachable from each of the camera body and the interchangeable lens unit,
An optical filter that changes the optical characteristics of light from the interchangeable lens unit toward the camera body and a position off the optical path of the light are provided in the mount adapter and centered on an axis perpendicular to the optical axis of the light. An optical filter rotating mechanism that includes a first rotating shaft that rotates and rotates the optical filter around the first rotating shaft to insert and remove the optical filter from the optical path of the light. Provided ,
The optical filter rotating mechanism includes a rotation driving device that rotates the optical filter to a predetermined rotation angular position and fixes the optical filter to the angular position in response to a given command. A first rotation angle position at which the optical filter is positioned in the optical path in a state where the incident surface is oriented in a direction perpendicular to the optical axis of the light, and the light incident surface of the optical filter is an optical axis of the light. The optical filter is driven to rotate between a second rotation angle position where the optical filter is positioned outside the optical path in a state of being directed in a parallel direction.
Mount adapter. A mount adapter provided between the camera body and the interchangeable lens unit so as to be detachable from each of the camera body and the interchangeable lens unit,
An optical filter that changes the optical characteristics of light from the interchangeable lens unit toward the camera body and a position off the optical path of the light are provided in the mount adapter and centered on an axis perpendicular to the optical axis of the light. An optical filter rotating mechanism that includes a first rotating shaft that rotates and rotates the optical filter around the first rotating shaft to insert and remove the optical filter from the optical path of the light. Provided ,
The optical filter rotating mechanism includes a rotation driving device that rotates the optical filter to a predetermined rotation angular position and fixes the optical filter to the angular position in response to a given command. A first rotation angle position in which the optical filter is positioned in the optical path in a state where the incident surface is oriented in a direction perpendicular to the optical axis of the light, and more than 90 degrees from the first rotation angle position; The optical filter is rotationally driven between a second rotational angular position where the optical filter is rotated and positioned outside the optical path.
Mount adapter. The mount adapter is provided at a position off the optical path and rotates about an axis perpendicular to the optical axis of the light, and rotates about the second rotation axis. A light reflection preventing member is provided, which is movable,
When the optical filter is at the second rotation angle position, the light reflection preventing member is rotated so that the light reflection preventing member covers the optical filter and the light reflection preventing member is positioned outside the optical path. It is equipped with a light reflection prevention member rotation mechanism that is driven dynamically.
The mount adapter according to claim 3 . When the interchangeable lens unit is not attached to the mount adapter, the light reflection preventing member rotation mechanism is in a rotation drive position where the surface portion of the light reflection prevention member faces in a direction perpendicular to the optical axis of the light. , Rotationally driving the light reflection preventing member,
The mount adapter according to claim 4 . A first lens member that narrows an optical path of light incident on the optical filter, and a second lens member that expands an optical path of light emitted from the optical filter.
The mount adapter according to any one of claims 1 to 5 . A power receiving unit that receives power from the camera body,
A memory for storing filter information of the optical filter;
A drive control unit that rotationally drives the optical filter in response to an instruction from the camera body; and a transmission unit that transmits filter information of the optical filter stored in the memory to the camera body.
The mount adapter according to any one of claims 1 to 6 .

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