Lens barrel and camera equipped with the same

Abstract

To provide a lens barrel capable of mounting an adapter compatible with a camera body having different specifications without increasing the size in an optical axis direction during photography, and a camera equipped with the lens barrel.SOLUTION: A lens barrel 10 includes a substantially cylindrical ring mount base 19, a plurality of lenses L1-L16, and a zoom ring 19b. The plurality of lenses L1-L16 are arranged along an optical axis direction. The zoom ring 19b changes the relative positions of the plurality of lenses L1-L16, moves the plurality of lenses L1-L16 so that they are stored inside the ring mount base 19 during no photography, and moves at least one of the plurality of lenses L1-L16 to a position that protrudes in the optical axis direction from the side of the ring mount base 19 that is attached to the camera body 50 during photography.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a lens barrel that is used while attached to a camera body, and a camera including the same. [Background technology]

[0002] In recent years, lens barrels mounted on cameras are composed of an optical system including multiple optical lenses, a drive unit for moving a frame that holds the optical system in the optical axis direction, an aperture unit, etc. For example, Patent Document 1 discloses an interchangeable lens barrel comprising: a fixed frame formed in an annular shape and having a length in the optical axis direction; a rectilinear frame that moves relative to the annular fixed frame in the optical axis direction, being housed within the fixed frame in a non-photographing state and being extended out of the fixed frame in a photographing state; and a first annular member that is placed on the rectilinear frame and consists of an annular member that has a length in the optical axis direction and is manually operated to rotate around the optical axis; when the lens barrel is in a photographing-ready state, at least a portion of the outer periphery of the first annular member is exposed to the outside, and the front end face of the annular member in front of the optical axis is located forward of the front end face in front of the optical axis of the fixed frame; and when the lens barrel is in a non-photographing-ready state, shortened in the optical axis direction from the photographing state, the rear end face behind the optical axis is within the fixed frame and is located further behind the optical axis than when the rear end face is in the photographing-ready state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2014 / 115760 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-described conventional interchangeable lens barrel has the following problems. That is, in the interchangeable lens barrel disclosed in the above publication, when taking a photograph, the lens moves so as to protrude toward the subject side compared to when it is retracted. For this reason, when an adapter is inserted between the lens barrel and the camera body to attach it to a camera body with different specifications, such as a full-size or Micro Four Thirds system, there is a problem in that the size in the optical axis direction during shooting increases by the thickness of the adapter.

[0005] The object of the present disclosure is to provide a lens barrel that can be fitted with an adapter compatible with a camera body with different specifications without increasing the size in the optical axis direction during shooting, and a camera equipped with the same. [Means for solving the problem]

[0006] The lens barrel according to the present disclosure is a lens barrel that is used while attached to a camera body, and in which the relative positions of multiple lenses change between when photographing and when not photographing, and includes a substantially cylindrical main body, multiple lenses, and a drive unit. The multiple lenses are arranged along an optical axis direction. The drive unit changes the relative positions of the multiple lenses, moves the multiple lenses so that they are stored inside the main body when not photographing, and moves at least one of the multiple lenses to a position that protrudes in the optical axis direction from the side of the main body that is attached to the camera body when photographing. [Effects of the Invention]

[0007] With the lens barrel according to the present disclosure, it is possible to attach an adapter compatible with a camera body with different specifications without increasing the size in the optical axis direction during shooting. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing a configuration of a lens barrel in a collapsed state according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view showing the configuration of the lens barrel in FIG. 1 at the WIDE position. [Figure 3A] 3 is a cross-sectional view showing the configuration of an FF adapter attached to a mount portion of the lens barrel of FIG. 2. [Figure 3B] 3 is a cross-sectional view showing the configuration of an MFTS adapter attached to the mount portion of the lens barrel in FIG. 2. [Figure 4A] 3 is a schematic diagram showing the configuration when retracted (not taking pictures) with an FF adapter or MFTS adapter attached between the lens barrel and camera body in FIG. 2. [Figure 4B] 3 is a schematic diagram showing the configuration during shooting with an FF adapter or MFTS adapter attached between the lens barrel and camera body in FIG. 2. [Figure 5] FIG. 3 is a cross-sectional view showing the lens barrel of FIG. 2 with an FF adapter attached. [Figure 6] FIG. 6 is a cross-sectional view showing a state in which the lens barrel in FIG. 5 has moved to a TELE position. [Figure 7] FIG. 3 is a cross-sectional view showing the lens barrel of FIG. 2 with the MFTS adapter attached. [Figure 8] FIG. 8 is a cross-sectional view showing a state in which the lens barrel in FIG. 7 has moved to a TELE position. [Figure 9] 3 is a graph showing the relationship between the zoom rotation angle and the zoom movement amount of each lens group, as an example of the design of the cam grooves of the cam barrel included in the lens barrel of FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, more detailed description than necessary may be omitted. For example, detailed description of well-known matters or redundant description of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. The applicant provides the accompanying drawings and the following description to enable those skilled in the art to fully understand the present disclosure, and does not intend for them to limit the subject matter described in the claims.

[0010] (Embodiment 1) A lens barrel 10 according to an embodiment of the present disclosure and a camera 100 equipped with the same will be described below with reference to FIGS. 1 to 9. FIG. (1) Overall configuration of the lens barrel 10 Lens barrel 10 according to this embodiment is attached to a mount on camera body 50 (see FIG. 4A, etc.) in a state where it is detachable from camera body 50. As shown in FIG. 1, adapters 30 and 40, which will be described later, are detachable on the image plane side of lens barrel 10, and lens barrel 10 is attached to a mount on camera body 50 with adapters 30 and 40 attached, thereby constituting camera 100 (see FIG. 4A, etc.). Lens barrel 10 has an optical system (lenses L1 to L16) that directs a subject image to an imaging element (not shown) provided on the camera body 50 side.

[0011] Furthermore, the lens barrel 10 can perform variable magnification photography by moving the built-in optical system between the wide-angle side (WIDE side position) shown in FIG. 2 and the telephoto side (TELE side position) shown in FIG. 6, which will be described later. When lens barrel 10 is in the WIDE position shown in FIG. 2, first unit 11 is housed on the inner circumferential surface side of ring mount base 19 (main body).

[0012] On the other hand, when the lens barrel 10 is in the TELE side position (see FIG. 6), the first unit 11 advances toward the subject along the optical axis direction and protrudes from the lens mount 20 toward the subject. 1, all of the lenses L1 to L16 included in the lens barrel 10 are positioned closer to the subject in the optical axis direction within the ring mount base 19. On the other hand, when the lens barrel 10 is in the WIDE position (when in use) shown in FIG. 2, some of the lenses L15, L16 arranged on the image plane side form a protruding portion X2 that protrudes from the end X1 of the lens barrel 10 toward the image plane side.

[0013] Here, when retracted as shown in FIG. 1, the length of lens barrel 10 in the optical axis direction remains unchanged, and lenses L1 to L16 are positioned inside ring mount base 19 closer to the subject. As shown in Figures 1 and 2, lens barrel 10 has an optical system made up of first group unit 11, second group unit 12, third group unit 13, third group unit 14, third group unit 15, fourth group unit 16, linear barrel 17a, cam barrel 17b, fifth group unit 18, ring mount base 19, focus ring 19a, zoom ring 19b (manual operation ring), lens mount 20, and multiple lenses L1 to L16.

[0014] In the lens barrel 10 of this embodiment, an adapter (FF (Full-size Frame) adapter 30 (see FIG. 3A) or MFTS (Micro Four Thirds System) adapter 40 (see FIG. 3B)) is attached between the end of the lenses L1 to L16 on the side opposite the subject side in the optical axis direction (the lens mount 20 side, the image plane side) and the camera body 50. That is, in this embodiment, as shown in FIG. 4A, an adapter (FF adapter 30 (see FIG. 3A) or MFTS adapter 40 (see FIG. 3B)) is inserted and attached between the image plane side of lens barrel 10 and camera body 50, thereby constituting camera 100. That is, as shown in FIGS. 4A and 4B, camera 100 of this embodiment includes lens barrel 10, an adapter (FF adapter 30 or MFTS adapter 40), and camera body 50.

[0015] As a result, even if the camera body 50 is not configured to be compatible with the connection part (lens mount 20) on the lens barrel 10 side, the lens barrel 10 can be attached to the camera body 50 by inserting and attaching an appropriate adapter. In lens barrel 10 of this embodiment, when retracted (not photographing) as shown in Fig. 4A, all lenses L1 to L16 are arranged on the inner circumferential side of lens barrel 10. On the other hand, when photographing (when in use) as shown in Fig. 4B, by rotating zoom ring 19b, lenses L15 and L16, which are arranged closest to the image plane in the optical axis direction, advance to a position where they protrude from the end of lens barrel 10 on the image plane side. At this time, protruding lenses L15 and L16 are contained within an adapter (FF adapter 30 or MFTS adapter 40), as shown in Fig. 4B.

[0016] As shown in FIGS. 4A and 4B, the length of lens barrel 10 of this embodiment in the optical axis direction remains unchanged when retracted (not taking pictures) and when taking pictures (when in use). This allows an appropriate adapter (FF adapter 30 or MFTS adapter 40) to be attached according to the specifications of camera body 50 without increasing the length of lens barrel 10 in the optical axis direction during shooting.

[0017] First group unit 11 is a roughly cylindrical member located closest to the subject in lens barrel 10. As shown in Figures 2A and 2B, first group unit 11 holds lenses L1 to L3 on the subject side and moves forward or backward along the optical axis by, for example, operating a manual operation ring (zoom ring 19b). This changes the distance between lenses L1 to L3, allowing wide-angle and telephoto photography to be performed.

[0018] First unit 11, which contains second to fifth units 12 to 18, linear barrel 17a, and cam barrel 17b, is attached to the inner peripheral surface of ring mount base 19. First unit 11 also has cam pins 11a (see FIGS. 6 and 8). The cam pin 11a is engaged with a linear groove of the linear barrel 17a, whereby the movement of the first group unit 11 in the rotational direction is restricted and the first group unit 11 is constrained to move along the optical axis direction.

[0019] Additionally, cam pin 11a engages with a cam groove in cam barrel 17b. As a result, the position of first group unit 11 in the optical axis direction is determined by the position where it engages with the cam groove, and the rotation of cam barrel 17b moves first group unit 11 to each zoom position, such as the retracted position, WIDE position, or TELE position. As shown in Figures 1 and 2, second unit 12 is a substantially cylindrical member arranged on the inner circumferential surface side of first unit 11, and holds lenses L4 to L7. Second unit 12 moves forward and backward along the optical axis direction by, for example, operating a manual operation ring (zoom ring 19b) (see Figures 5 and 6, etc.). Second unit 12 also has cam pin 12a (see Figures 6 and 8).

[0020] Cam pin 12a engages with a linear groove in linear barrel 17a, whereby second unit 12, like first unit 11, is restricted from moving in the rotational direction and is constrained to move along the optical axis direction. Additionally, cam pin 12a engages with a cam groove in cam barrel 17b. As a result, similar to first group unit 11, the position of second group unit 12 in the optical axis direction is determined by the position where it engages with the cam groove, and second group unit 12 moves to each zoom position, such as the retracted position, WIDE position, or TELE position, by rotation of cam barrel 17b.

[0021] As shown in Fig. 1, the 3a group unit 13 is a substantially cylindrical member located on the inner circumferential surface side of the first group unit 11, and is located on the image plane side of the second group unit 12 in the optical axis direction. As shown in Figs. 1 and 2, the 3a group unit 13 holds the lens L8 and has an aperture unit 13a provided on the subject side of the lens L8. The 3a group unit 13 moves forward and backward along the optical axis direction by, for example, operating a manual operation ring (zoom ring 19b). The 3a group unit 13 also has a cam pin 13b (see Figs. 6 and 8).

[0022] Cam pin 13b engages with the linear groove of linear barrel 17a, whereby, like first unit 11 and second unit 12, movement of 3a group unit 13 in the rotational direction is restricted and 3a group unit 13 is constrained to move along the optical axis direction. Additionally, cam pin 13b engages with a cam groove in cam barrel 17b. As a result, like first group unit 11 and second group unit 12, the position of 3a group unit 12 in the optical axis direction is determined by the position where it engages with the cam groove, and rotation of cam barrel 17b moves 3a group unit 12 to each zoom position, such as the retracted position, WIDE position, or TELE position.

[0023] Aperture unit 13a is a substantially annular member that adjusts the amount of light passing through the lens portion of lens barrel 10 by driving movable blades to change the area of ​​the opening. The 3b group unit 14 is a substantially cylindrical member located on the inner circumferential surface side of the first group unit 11, and is located on the image plane side of the 3a group unit 13 in the optical axis direction. As shown in Figures 1 and 2, the 3b group unit 14 holds lenses L9 to L12. The 3b group unit 14 moves forward and backward along the optical axis direction by, for example, operating a manual operation ring (zoom ring 19b).

[0024] The 3c group unit 15 is a substantially disk-shaped member located on the inner circumferential surface side of the first group unit 11, and is located on the image plane side of the 3b group unit 14 in the optical axis direction. The 3c group unit 15 holds lens L13, as shown in Figures 1 and 2, etc. The 3c group unit 15 moves forward and backward along the optical axis direction by, for example, operating a manual operation ring (zoom ring 19b).

[0025] In the lens barrel 10 of this embodiment, the 3a group unit 13, the 3b group unit 14, and the 3c group unit 15 are integrated as a three-group unit that moves forward and backward in the optical axis direction, and a fourth group unit 16 is disposed on the inner periphery thereof. Fourth group unit 16 is a substantially disk-shaped member located on the inner circumferential surface side of first group unit 11, and is located on the image plane side of 3c group unit 15 in the optical axis direction. As shown in FIGS. 1 and 2, fourth group unit 16 holds lens L14. Fourth group unit 16 moves forward and backward along the optical axis direction by, for example, operating a manual operation ring (zoom ring 19b). Fourth group unit 16 moves integrally with 3a, 3b, and 3c group units 13, 14, and 15, but performs focusing by moving forward and backward along the optical axis direction through autofocusing or manual focusing by operating focus ring 19a.

[0026] Fourth group unit 16 is a focus group that adjusts the focal position, and is disposed within the third group unit including 3a, 3b, and 3c group units 13, 14, and 15. Fourth group unit 16 is driven back and forth in the optical axis direction together with the third group unit. Furthermore, fourth group unit 16, together with the third group unit, is driven by a focus adjustment actuator (linear actuator).

[0027] The linear barrel 17a is a substantially cylindrical member having linear grooves formed along the optical axis direction, and is disposed on the inner peripheral surface side of the first group unit 11, as shown in Figures 1 and 2, etc. The cam barrel 17b is a substantially cylindrical member in which a cam groove is formed along a direction intersecting the optical axis direction, and as shown in Figures 1 and 2, etc., it is disposed on the inner peripheral surface side of the first group unit 11 while being attached to the outer peripheral side of the linear movement barrel 17a.

[0028] Cam pins of second unit 12, 3a unit 13, 3b unit 14, fifth unit 18, etc. are fitted into the linear grooves of linear barrel 17a and the cam grooves of cam barrel 17b. As a result, when a rotational drive force is applied from a rotational drive source (not shown), the cam pins and the like move along the cam grooves, and first to fifth unit 11 to 18 can be moved back and forth in the optical axis direction. Therefore, by adjusting the distances between lenses L1 to L16 included in first to fifth unit 11 to 18, wide-angle photography, telephoto photography, and the like can be performed.

[0029] As shown in FIG. 1, fifth group unit 18 is a substantially disk-shaped resin member that is located on the inner peripheral surface side of first group unit 11, on the inner peripheral surface side of linear movement barrel 17a and cam barrel 17b, and is located on the image plane side of fourth group unit 16 in the optical axis direction. As shown in FIGS. 1 and 2, fifth group unit 18 holds lenses L15 and L16. Fifth group unit 18 moves forward and backward along the optical axis direction by, for example, operating a manual operation ring (zoom ring 19b). Furthermore, fifth group unit 18 has cam pins 18a (see FIGS. 6 and 8).

[0030] Cam pin 18a engages with a linear groove in linear barrel 17a, whereby fifth unit 18, like first unit 11, is restricted from moving in the rotational direction and is constrained to move along the optical axis. Additionally, cam pin 18a engages with a cam groove in cam barrel 17b. As a result, like first group unit 11 and the like, fifth group unit 18 has its position in the optical axis direction determined by the position where it engages with the cam groove, and moves to each zoom position, such as the retracted position, WIDE position, or TELE position, by rotation of cam barrel 17b.

[0031] Ring mount base 19 (main body) is a cylindrical member that constitutes the exterior portion of lens barrel 10, and has annular focus ring 19a, zoom ring 19b, etc. rotatably attached to its outer circumferential surface. The focus ring 19a is a cylindrical member that is rotatably attached to the subject side of the outer peripheral surface of the ring mount base 19, and is rotated to operate the focus mechanism by changing the relative positions of the multiple lenses L1 to L16.

[0032] The zoom ring 19b is a cylindrical member that is rotatably attached to the image plane side of the outer circumferential surface of the ring mount base 19, and is rotated when performing zooming by changing the relative positions of the multiple lenses L1 to L16. As shown in Figure 1, the lens mount 20 is a roughly circular plate-shaped member that serves as a base to which an adapter (FF adapter 30 or MFTS adapter 40) or a camera body 50 is connected, and is attached to the image plane side of the ring mount base 19.

[0033] FF adapter 30 is a substantially cylindrical auxiliary member that is detachably attached to, for example, a camera body 50 equipped with a full-size image sensor and lens mount 20 of lens barrel 10. FF adapter 30 has a substantially cylindrical main body portion 31, a coupling portion 32, and a mount portion 33, as shown in FIG. The coupling portion 32 is a member that couples with the lens mount 20 of the lens barrel 10, and is provided on the subject side of the main body 31. The coupling portion 32 connects the lens barrel 10 and the adapter 30, for example, by a bayonet coupling.

[0034] The mount section 33 is a member that connects the mount section of the camera body 50 and the FF adapter 30, and is provided on the image plane side of the body section 31. The mount section 33 connects the camera body 50 and the adapter 30 by, for example, a bayonet connection. The MFTS adapter 40 is a substantially cylindrical auxiliary member that is detachably attached to, for example, a mirrorless camera body 50 equipped with a Micro Four Thirds size image sensor, and the lens mount 20 of the lens barrel 10. As shown in FIG. 3B , the MFTS adapter 40 has a substantially cylindrical main body portion 41, a coupling portion 42, and a mount portion 43.

[0035] The coupling portion 42 is a member that couples with the lens mount 20 of the lens barrel 10, and is provided on the subject side of the main body portion 41. The coupling portion 42 connects the lens barrel 10 and the adapter 40, for example, by a bayonet coupling. The mount section 43 is a member that connects the mount section of the camera body 50 and the MFTS adapter 40, and is provided on the image plane side of the body section 41. The mount section 43 connects the camera body 50 and the adapter 40 by, for example, a bayonet connection.

[0036] Here, the configuration in which the FF adapter 30 is attached between the lens barrel 10 and the camera body 50 will be described below with reference to FIGS. 5 and 6. FIG. 5, when lens barrel 10 with FF adapter 30 attached is in the WIDE position, of lenses L1 to L16 included in lens barrel 10, lenses L15 and L16 (fifth group unit 18) arranged on the image plane side protrude from end X1 of lens barrel 10 toward the image plane side and are arranged on the inner circumferential surface side of FF adapter 30. On the other hand, when lens barrel 10 is in the TELE position, all of lenses L1 to L16 included in lens barrel 10 are arranged on the inner circumferential surface side of lens barrel 10, as shown in FIG.

[0037] Next, the configuration in which the MFTS adapter 40 is attached between the lens barrel 10 and the camera body 50 will be described below with reference to FIGS. 7, when the lens barrel 10 with the MFTS adapter 40 attached is in the WIDE position, of the lenses L1 to L16 included in the lens barrel 10, the lenses L15 and L16 (fifth unit 18) arranged on the image plane side protrude from the end X1 of the lens barrel 10 towards the image plane side and are arranged on the inner circumferential surface side of the MFTS adapter 40. On the other hand, when the lens barrel 10 is in the TELE position, as shown in FIG. 8, all of the lenses L1 to L16 included in the lens barrel 10 are arranged on the inner circumferential surface side of the lens barrel 10.

[0038] As described above, when the lens barrel 10 of this embodiment is retracted (when not taking pictures), all lenses L1 to L16 are positioned closer to the subject in the optical axis direction (see Figure 1), and when taking pictures, particularly at the WIDE side position, the lenses L15 and L16 positioned closest to the image plane are positioned so that they protrude from the end X1 of the lens barrel 10 toward the image plane (see Figures 2, 5 and 7).

[0039] That is, in the retracted position shown in FIG. 1, compared to the WIDE position shown in FIG. 2, first group unit 11 and second group unit 12 are in the WIDE position, but the third group unit (3a, 3b, 3c group units 13, 14, 15) moves toward the subject, and fifth group unit 18 is positioned in the space provided on the image plane side of lens barrel 10. The cam grooves provided in cam barrel 17b move first, second, third, and fifth group units 11, 12, 13, and 18 in the optical axis direction relative to the zoom rotation angle, as shown in Fig. 9. Specifically, the cam grooves are designed so that third group unit 13 and fifth group unit 18 are positioned on the subject side in the retracted position (0°) shown in Fig. 9.

[0040] In FIG. 9, the zoom movement amount is plotted with the WIDE position as the movement starting point. This allows the lenses L15, L16 that protrude toward the image plane to be contained on the inner surface of the adapter (FF adapter 30 or MFTS adapter 40), thereby preventing the lenses L15, L16 from interfering with the camera body 50.

[0041] <Major features> The lens barrel 10 of this embodiment is used while attached to a camera body 50, and the relative positions of multiple lenses L1-L16 change between when shooting and when not shooting. The lens barrel 10 includes a substantially cylindrical ring mount base 19, multiple lenses L1-L16, and a zoom ring 19b. The multiple lenses L1-L16 are arranged along the optical axis direction. The zoom ring 19b changes the relative positions of the multiple lenses L1-L16 and moves the multiple lenses L1-L16 so that they are stored inside the ring mount base 19 when not shooting, and moves at least one of the multiple lenses L1-L16 to a position that protrudes in the optical axis direction from the side of the ring mount base 19 that is attached to the camera body 50 when shooting.

[0042] This allows the same lens barrel 10 to be connected to camera bodies 50 of various specifications by attaching a corresponding adapter (FF adapter 30 or MFTS adapter 40) depending on whether the camera body 50 is a model equipped with a full-size image sensor or a model equipped with a Micro Four Thirds system image sensor. As a result, for camera bodies 50 with different specifications, such as full size and Micro Four Thirds systems, it is possible to attach a corresponding adapter (FF adapter 30 or MFTS adapter 40, etc.) and connect it to lens barrel 10 without increasing the size in the optical axis direction during shooting.

[0043] [Other embodiments] Although one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment, and various modifications are possible without departing from the gist of the disclosure. (A) In the above embodiment, an example was described in which the zoom ring 19b (manually operated ring) is used as a drive unit that changes the relative positions of the multiple lenses L1 to L16, moves the lenses L1 to L16 so that they are housed inside the ring mount base 19 when retracted (when not taking pictures), and moves at least one of the lenses L1 to L16 to a position that protrudes in the optical axis direction from the side of the ring mount base 19 that is attached to the camera body 50 when taking pictures. However, the present disclosure is not limited to this.

[0044] For example, a configuration may be adopted in which a driving unit such as a motor is used to electrically control the change in the relative positions of multiple lenses, and the multiple lenses are moved so that they are stored inside the main body when not taking pictures, and when taking pictures, at least one of the multiple lenses is moved to a position protruding in the optical axis direction from the side of the main body that is attached to the camera body. (B) In the above embodiment, the FF adapter 30 and the MFTS adapter 40 have been described as examples of adapters that are attached between the lens barrel 10 and the camera body 50. However, the present disclosure is not limited to this.

[0045] For example, the adapter attached between lens barrel 10 and camera body 50 may be an adapter other than the FF adapter and the MFTS adapter. (C) In the above embodiment, as shown in Figure 2 etc., an example has been described in which lenses L15, L16 (fifth unit 18) arranged on the image plane side in the optical axis direction are arranged at a position protruding from end X1 of lens barrel 10 toward the image plane side during shooting (during use). However, the present disclosure is not limited to this.

[0046] For example, the lens that protrudes toward the image plane in the optical axis direction during photography is not limited to a lens included in the fifth unit, but may be a lens included in another lens group. (D) In the above embodiment, an example was given in which the number of lenses included in the lens barrel 10 was 16. However, the present disclosure is not limited to this.

[0047] For example, the number of lenses included in the lens barrel may be 15 or less, or 17 or more. <Additional Notes> The above description of the embodiments discloses the following techniques. (Technology 1) The lens barrel according to Technology 1 is A lens barrel that is attached to a camera body and used in such a state that the relative positions of multiple lenses change between when photographing and when not photographing, A substantially cylindrical main body portion; a plurality of lenses arranged along an optical axis direction; a drive unit that changes relative positions of the plurality of lenses, moves the plurality of lenses so that they are stored inside the main body when not taking pictures, and moves at least one of the plurality of lenses to a position that protrudes in the optical axis direction from the side of the main body that is attached to the camera body when taking pictures; It is equipped with:

[0048] (Technology 2) The lens barrel according to Technology 2 is A lens barrel that is attached to a camera body and used in such a state that the relative positions of multiple lenses change between when photographing and when not photographing, A substantially cylindrical main body portion; a plurality of lenses arranged along an optical axis direction; a drive unit that changes the relative positions of the plurality of lenses and moves the plurality of lenses toward a subject side of the body unit while keeping the length of the body unit in the optical axis direction unchanged when not taking an image; It is equipped with:

[0049] (Technology 3) The lens barrel according to Technology 3 is the lens barrel according to Technology 1 or 2, The camera further includes an adapter that is detachably attached between the main body and the camera body, and into whose inner periphery at the time of shooting, at least one of the plurality of lenses is inserted. (Technology 4) The lens barrel according to Technology 4 is the lens barrel according to Technology 3, The adapter is attachable to a camera lens system different from that of the camera body.

[0050] (Technology 5) A lens barrel according to Technology 5 is the lens barrel according to Technology 3, The adapter is detachable from the camera body. (Technology 6) A lens barrel according to a sixth aspect of the present invention is a lens barrel according to any one of the first to fifth aspects of the present invention, The drive unit is a substantially annular manually operated ring that is rotatably attached to the outer circumferential surface of the main body and that changes the relative positions of the plurality of lenses when rotated.

[0051] (Technology 7) A lens barrel according to Technology 7 is a lens barrel according to any one of Technology 1 to Technology 6, The drive unit is a motor provided inside the main body and electrically changes the relative positions of the plurality of lenses. (Technology 8) The camera related to Technology 8 is A lens barrel according to any one of techniques 1 to 7; the camera body; It is equipped with: [Industrial Applicability]

[0052] The lens barrel of the present disclosure has the advantage of being able to attach an adapter compatible with a camera body with different specifications without increasing the size in the optical axis direction during shooting, and is therefore widely applicable to camera systems that include a lens barrel that is detachable from a camera body. [Explanation of symbols]

[0053] 10 Lens barrel 11 1st group unit 11a Campin 12 2nd group unit 12a Campin 13 Group 3a Unit 13a Aperture unit 13b Campin 14 3b Group Unit 15 3c Group Unit 16 4th group unit 17a Straight-moving tube 17b Cam barrel 18 5th group unit 18a Campin 19 Ring mount base (main body) 19a Focus ring 19b Zoom ring (drive unit, manual operation ring) 20 Lens mount 30 FF adapter (adapter) 31 Main body 32 Joint 33 Mounting section 40 MFTS adapter (adapter) 41 Main body 42 Joint 43 Mounting section 50 Camera body L1~L16 Lens (optical system) X1 end X2 protruding part

Claims

1. A lens barrel that is attached to a camera body and used in such a state that the relative positions of multiple lenses change between when photographing and when not photographing, A substantially cylindrical main body portion; a plurality of lenses arranged along an optical axis direction; a drive unit that changes the relative positions of the plurality of lenses, moves the plurality of lenses so that they are stored inside the main body when not taking pictures, and moves at least one of the plurality of lenses to a position that protrudes in the optical axis direction from the side of the main body that is attached to the camera body when taking pictures; A lens barrel comprising:

2. A lens barrel that is attached to a camera body and used in such a state that the relative positions of multiple lenses change between when photographing and when not photographing, A substantially cylindrical main body portion; a plurality of lenses arranged along an optical axis direction; a drive unit that changes the relative positions of the plurality of lenses and moves the plurality of lenses toward a subject side of the body unit while keeping the length of the body unit in the optical axis direction unchanged when not taking an image; A lens barrel comprising:

3. The camera further includes an adapter that is detachably attached between the main body and the camera body, and into whose inner periphery at the time of shooting, at least one of the plurality of lenses is inserted.

3. The lens barrel according to claim 1.

4. the adapter is attachable to a camera lens system different from that of the camera body; The lens barrel according to claim 3 .

5. The adapter is detachable from the camera body. The lens barrel according to claim 3 .

6. the drive unit is a substantially annular manually operated ring that is rotatably attached to the outer peripheral surface of the main body and that changes the relative positions of the plurality of lenses by a rotational operation; 3. The lens barrel according to claim 1.

7. the drive unit is a motor provided inside the main body and electrically changes the relative positions of the plurality of lenses; 3. The lens barrel according to claim 1.

8. The lens barrel according to claim 1 or 2; the camera body; A camera equipped with:

Images