JP2015191141A - Lens device and imaging device with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability and workability of a lens that moves in the optical axis direction by a cam and a cam follower, and to adjust the eccentricity while checking the optical performance of the lens device without deteriorating the optical performance. I will provide a. A lens device includes a lens holding portion that holds a lens, a moving cylinder that holds the lens holding portion and includes a cam follower, a cam cylinder that has a cam groove that is in sliding contact with the cam follower, and a cam follower that extends in the optical axis direction. A fixed tube having a guide groove that is in sliding contact with the cam tube, and the cam groove and the guide groove are configured to determine the position of the movable tube in the optical axis direction by a rotation angle around the optical axis with respect to the fixed tube of the cam tube, The moving cylinder protrudes from the end of the cam cylinder in the optical axis direction at one moving end, and the eccentric adjustment that adjusts the position of the lens holding portion with respect to the moving cylinder in a plane perpendicular to the optical axis at the protruding portion The fixed cylinder has a tool insertion hole into which an adjustment tool for operating the eccentricity adjustment mechanism can be inserted from the outside in the radial direction. [Selection] Figure 1

Description

  The present invention relates to a lens device, and more particularly, to a lens device having a configuration that can adjust the eccentricity around the optical axis of a moving mechanism that holds the lens and moves the lens in the optical axis direction, and an imaging device having the lens device. .

  As a structure for adjusting the position of the lens group in the plane perpendicular to the optical axis, Patent Document 1 proposes a structure for adjusting the eccentricity of the lens group by rotating the eccentric shaft inserted into the elongated hole. Yes. Patent Document 2 discloses a structure in which an adjustment screw on an inner diameter of a cam follower is rotated with respect to a lens group that is moved in the optical axis direction by a cam and a cam follower, and the lens group is eccentrically adjusted by pressing the lens barrel. is suggesting.

JP 2010-256567 A Japanese Patent Application Laid-Open No. 08-327872

  In the case of a moving lens group that moves in the optical axis direction by a cam and a cam follower, the axis of the moving lens group in which another lens group exists before and after the optical axis direction has the following problems. In Patent Document 1, since the central axis direction of the eccentric shaft for adjustment and the optical axis direction are the same, in order to insert the adjustment tool into the eccentric shaft, it is necessary to disassemble and remove the front and rear lens groups. is there. Also, in Patent Document 2, when attaching or detaching a tool used for eccentricity adjustment, the cam or the cam follower may be damaged, and the slidability of the cam and the cam follower may be deteriorated. Connected.

  Accordingly, an object of the present invention is to provide a structure for adjusting the eccentricity of a lens group that moves in the optical axis direction by a cam and a cam follower without disassembling the front and rear lens groups and without damaging the cam or cam follower. To do.

  In order to achieve the above object, a lens device according to the present invention includes a lens holding portion that holds a lens, a moving barrel that holds the lens holding portion and includes a cam follower, and a cam barrel that has a cam groove that is in sliding contact with the cam follower. And a fixed cylinder extending in the optical axis direction and having a guide groove that is in sliding contact with the cam follower, the optical axis direction of the movable cylinder depending on the rotation angle of the cam cylinder around the optical axis with respect to the fixed cylinder The cam groove and the guide groove are configured so as to determine the position of the movable tube, and the moving tube protrudes from the end of the cam tube in the optical axis direction at one moving end, and the protruding portion has an optical axis. A tool capable of inserting an adjusting tool for operating the eccentricity adjusting mechanism from the outside in the radial direction, the eccentricity adjusting mechanism for adjusting the position of the lens holding portion with respect to the movable cylinder in a plane perpendicular to the moving cylinder. Having Nyuana, characterized in that.

  According to the present invention, the lens that moves in the optical axis direction by the cam and the cam follower is adjusted eccentrically while checking the optical performance of the lens device at a position other than the cam and the cam follower, thereby improving operability and workability. The present invention provides a lens apparatus and an image pickup apparatus having the lens apparatus that can adjust the eccentricity without affecting the driving performance.

It is the fragmentary sectional view which showed the state at the time of eccentric adjustment of the lens apparatus in Example 1 of this invention. It is the fragmentary sectional view which showed the product use condition in Example 1 of this invention. It is a fragmentary sectional view by the side of the telephoto at the time of eccentric adjustment of the lens apparatus in Example 1 of this invention. It is the fragmentary sectional view which showed the state at the time of the eccentric adjustment of the lens-barrel in Example 2 of this invention. It is (a) AA sectional drawing of FIG. 4, (b) BB sectional drawing. 5A is a cross-sectional view taken along line AA in FIG. 4 and FIG. 5B is a cross-sectional view taken along line BB at the time of eccentricity adjustment. It is a fragmentary sectional view of the lens apparatus in Example 3 of the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The lens apparatus of the present embodiment will be described with reference to FIGS. FIG. 1 is a partial cross-sectional view of the lens apparatus when the eccentricity adjustment is performed in the present embodiment, and FIG. 2 is a partial cross-sectional view showing a use state of the product as a lens with respect to FIG. FIG. 3 is a partial cross-sectional view of the zoom lens as a movable optical element located on the telephoto side with respect to FIG. In the description of the embodiments of the present invention, a zoom lens is exemplified as a movable optical element having a configuration that moves in the optical axis direction, but the present invention is not limited to this. The configuration of the present invention can be similarly applied to the case of adjusting the eccentricity of a configuration that can be moved in the optical axis direction by other optical elements such as a focus lens.

  In the sectional views of the lenses in FIGS. 1, 2, 3, 4, and 7, the left side is described as the object side, and the right side as the (image side) imaging device side. In the following description, when describing the positional relationship in the lens, the object side is also referred to as the front side, and the image side is also referred to as the rear side.

  The cam mechanism of the lens device will be described with reference to FIG. The lens device 1 includes a lens holding unit, a plurality of lenses, and a drive system that drives some of the plurality of lenses. The drive system of this embodiment uses a so-called cam mechanism to move the lens group in the optical axis direction for zooming. The plurality of lenses includes a zoom lens including a lens 50 that performs zooming, a focus lens including a lens 51 that performs focusing, and a relay lens (not shown). The lens 50 is fixed to the lens holding portion 4 by a lens holding structure such as a presser ring or a caulking. The lens holding unit 4 moves in a state where there is a gap between the outer diameter of the lens holding unit 4 and the inner diameter of the movable cylinder 3a so that the lens holding unit 4 can move in a plane perpendicular to the optical axis 52. It is fixed to the cylinder 3a by a lens holding part fixing screw 60. The cam follower 7 is fixed to the movable cylinder 3a and is in sliding contact with a cam groove 6 in the rotating cam 5 and a linear groove (guide groove) 9 extending in the optical axis direction on the fixed cylinder 8a. Here, the cam follower 7, the cam groove 6, and the linear groove 9 are arranged at three places substantially equally divided around the optical axis, so that the movable cylinder 3 a can be moved in the optical axis direction while maintaining the posture of the movable cylinder 3 a. Yes. The cam 5 is held on the inner diameter portion of the fixed cylinder 8a so as to be rotatable around the optical axis by the connecting ring 10a. When the cam 5 rotates, the cam follower 7 moves along the cam groove 6 in the optical axis direction, and zooming is performed by changing the position of the lens 50. That is, the cam groove and the linear groove are configured so as to demarcate the position of the movable cylinder in the optical axis direction by the rotation angle of the cam cylinder around the optical axis. In this embodiment, the zoom lens is represented by a single lens. However, in reality, a lens group composed of a plurality of lenses (not shown) moves in the optical axis direction by rotation of a cam. Since the cam 5 rotates in conjunction with (or integrally with) the rear graduation ring 33a that fits and slides on the outer periphery of the fixed cylinder 8a, the photographer manually or electrically operates the rear graduation ring 33a. The zooming operation can be performed by rotating the lens to obtain a desired angle of view.

  Next, a structure for adjusting the eccentricity of the lens 50 in this embodiment will be described. The lens holding part fixing screw 60 is screwed into the moving cylinder 3a and presses the lens holding part 4 against the moving cylinder 3a in the optical axis direction via an elastic member such as a spring washer. Since the lens holding unit 4 and the moving cylinder are in contact with each other on a plane perpendicular to the optical axis 52, when a force is applied to the lens holding part 4 from a direction perpendicular to the optical axis 52, the lens holding part 4 and the moving cylinder are mutually connected. The lens holder 4 slides on the contacting surface, and moves in the range of the gap with the moving cylinder 3a described above. In the outer diameter of the lens holding portion 4, a cylindrical push pin 20 is inserted into a guide hole provided in the moving cylinder 3 a in a direction perpendicular to the optical axis so as to be movable in the central axis direction of the push pin 20. It is held with a gap. The movable cylinder 3a protrudes forward in the optical axis direction from the front end face of the cam 5 when the zoom lens is at the wide angle side (front end of the moving range in the optical axis direction). A guide hole provided in the moving cylinder 3a in a direction perpendicular to the optical axis is formed in the protruding portion.

  A flat surface is provided at the tip of the push pin 20 on the radially outer side of the lens so as to come into contact (contact) with the tip of an eccentric adjustment shaft (adjustment tool) 21 described later. At the time of eccentric adjustment, the eccentric adjustment shaft 21 is inserted into the tool insertion hole (through hole portion) 2a provided on the rotating scale ring 31 rotating on the outer diameter portion of the fixed cylinder 8a and the tool insertion provided on the connecting ring 10a. Through the hole 2b, it protrudes to the outside so that it can be rotated (adjusted) from the outside in the radial direction of the lens. The eccentric adjustment shaft 21 is screwed to the tool body 22a, which is detachably fixed to the screw hole provided in the fixed cylinder 8a by the tool fixing screw 23, so that the screw can be fed to the radial center side of the lens holding portion. It is screwed. The push pins 20 are arranged at four locations that are equally divided around the optical axis of the lens holding portion 4. The eccentricity adjusting shafts 21 are arranged at positions corresponding to the push pins 20, that is, at four positions equally divided around the optical axis. In order to arrange the eccentric adjustment shaft 21 at this position, the tool main body 22a, the tool insertion holes 2a and 2b, and the tool fixing screw 23 are similarly arranged at four locations equally divided around the optical axis.

  When the position of the lens holding unit 4 is eccentrically adjusted within a plane perpendicular to the optical axis by a desired amount, the lens 50 (lens holding unit 4) is adjusted by the following operation.

  The operator tightens the screw mechanism of the eccentric adjustment shaft 21 and the tool body 22a so as to move the eccentric adjustment shaft 21 toward the optical axis 52 (to the radial center side of the lens holding portion). Then, since the push pin 20 in contact with the tip of the eccentricity adjusting shaft 21 receives a force toward the optical axis 52 (radial center side of the lens holding portion), the lens holding portion 4 exerts a force on the moving cylinder 3a. The position changes in a direction corresponding to the central axis of the push pin 20 receiving the force. If the eccentric adjustment shaft 21 on the opposite side is not in contact with the push pin 20 with respect to the eccentric adjustment shaft 21 to be adjusted, the lens is moved to the position where the opposite eccentric adjustment shaft 21 contacts the push pin 20. The holding part can be moved. If the eccentric adjustment shaft 21 on the opposite side is in contact with the push pin 20, the eccentric adjustment shaft 21 on the opposite side is previously rotated by rotating the eccentric adjustment shaft 21 on the opposite side away from the optical axis 52. Eccentricity adjustment can be performed by making a play with the push pin 20. The eccentric adjustment direction can be adjusted from the four directions in which the push pin 20 and the eccentric adjustment shaft 21 are arranged, so that the position of the lens holding portion 4 can be adjusted to a desired position from the two orthogonal directions. It is.

  When performing the eccentric adjustment, the eccentric adjustment can be performed by bringing only one eccentric adjustment shaft 21 into contact with the corresponding push pin 20 and pressing the push pin in the corresponding direction. Further, when the eccentricity adjustment is performed by pressing the push pin in one direction, the adjustment may be performed in a state where the two eccentricity adjustment shafts 21 in the direction orthogonal to the pressing direction are in contact with the push pin 20. This suppresses the movement of the lens holding part in a direction orthogonal to the pushing direction, and prevents the lens holding part from moving in a direction not intended by the operator (a direction orthogonal to the adjustment direction). You may make it do.

  Further, the lens holding portion 4 is fixed by the lens holding portion fixing screw 60 with a force that does not move even when an impact is applied due to a frictional force on the contact surface with the movable cylinder 3a. However, it may be fixed after adjustment between the push pin 20 and the moving cylinder 3a by adhesion or the like as a stronger fixation. When the eccentricity adjustment of the lens holding portion 4 is performed, the zoom lens is positioned on the wide-angle side at the front end, but the contact between the push pin 20 and the eccentricity adjustment shaft 21 is released by loosening the eccentricity adjustment shaft 21. If the rear scale ring 33a is rotated, the telescopic side state shown in FIG. 3 can be obtained without removing the tool body 22a from the fixed cylinder 8a. Therefore, it is possible to smoothly perform the optical performance confirmation work and the eccentricity adjustment work during zooming.

  Four tool insertion holes (through-hole portions) 2 a are provided on the rotary scale ring 31 that rotates at the outer diameter portion of the fixed cylinder 8 a so as to correspond to the eccentric adjustment shaft 21. The rotary scale ring 31 is connected and fixed to the front rotary ring (operation ring) 32 in the circumferential direction by an adhesive means such as a tape. When the front rotating ring 32 is rotated, the connecting pin 36 and the front moving barrel 35 that fixes the connecting pin 36 are also rotated accordingly. Since the front movable barrel 35 is connected to the front fixed barrel 30 by a screw feed mechanism, when the front movable barrel 35 rotates, the lens 51 fixed to the front movable barrel 35 moves in the optical axis direction. Thus, since the rotary scale ring 31 rotates with respect to the fixed cylinder 8a, the eccentric adjustment of the lens holding portion 4 can be adjusted from four directions by changing the rotational position of the rotary scale ring 31 even with one tool insertion hole 2a. Since it becomes possible, it is also possible to reduce the load which processes a hole. Further, since the tool insertion hole 2a is hidden by a rubber ring (operation assisting member) 37 for assisting manual operation of the rotary scale ring 31 in the product use state, dust is not used without using a dedicated member for hiding the hole. Etc., and the number of parts can be reduced. In addition, the appearance is not impaired. Further, the tool insertion hole 2a is a hole into which a tool for fastening a fixing screw (fastening means) 61a that fixes a fixed cylinder configured to be split, for example, the fixed cylinder 8a and the front side fixing cylinder 30, is inserted. Therefore, it is not necessary to provide a separate hole for inserting a tool.

  As described above, according to this embodiment, the position of the lens holding portion 4 driven by the cam mechanism is decentered in a plane perpendicular to the optical axis 52 by the decentering adjustment shaft 21 without removing the front and rear lenses. Can be adjusted. Further, since the position where the push pin 20 contacts the eccentricity adjusting shaft 21 is a position protruding from the tip of the cam 5, the tool is not adjusted during the eccentricity adjustment with respect to a mechanism using a cam mechanism such as a cam hole as an eccentricity adjusting means. The cam and cam groove are not damaged unintentionally. In this embodiment, the zoom unit has been described as an example, but the present invention can also be applied to a moving optical element such as a focus unit using a similar structure.

  The lens apparatus in the present embodiment will be described with reference to FIGS.

  FIG. 4 is a partial cross-sectional view of a lens barrel in Embodiment 2 of the present invention. 5A is a sectional view taken along the line AA in FIG. 4 and FIG. 5B is a sectional view taken along the line BB in FIG. 4 in a state where the stopper position adjusting shaft is retracted (moved away from the optical axis). It is a thing. 6 shows (a) a cross-sectional view taken along line AA in FIG. 4 and (b) a cross-sectional view taken along line BB in FIG.

  In the lens apparatus having the eccentricity adjusting mechanism described in the first embodiment, the eccentricity adjustment is performed at the end of the driving range that is normally used as the lens apparatus of the movable optical element (zoom lens) of the lens apparatus. On the other hand, the present embodiment is characterized in that the position of the movable optical element that performs the decentration adjustment is outside the range that is normally used as a lens device.

  The lens apparatus of this embodiment has the same basic structure as that of the lens apparatus of the first embodiment shown in FIG. 1, but the characteristic structure of the zoom lens shown in FIGS. It has a stopper structure for restricting the rotating end of the cam mechanism (the moving end of the zoom lens in the optical axis direction).

  The structure of the zoom rotation operation end in this embodiment will be described with reference to FIG.

  The cylindrical stopper 11 is fixed to the cam 5 and is fitted into a hole in the rear scale ring 33b. When the photographer rotates the rear scale ring 33b in the clockwise direction in FIG. 5, the rear scale ring 33b, the stopper 11, and the cam 5 are integrally rotated to the wide-angle side operation end. At the wide-angle side operation end (operation end on the side where eccentric adjustment is performed), the stopper contact surface 15 a of the stopper 11 is in contact with the rotation restriction plate end surface 16 of the rotation restriction plate 12, thereby defining the rotation end. The rotation restricting plate 12 is disposed and buried in a groove provided in the fixed cylinder 8b. Further, since the guide shaft 13 fixed to the fixed cylinder 8b passes through the hole provided in the rotation restricting plate 12 so as to be slidable, the rotation restricting plate 12 is restricted from rotating with respect to the fixed tube around the optical axis. The movement direction is limited only to 53a and 53b. In the photographing state shown in FIG. 5, the stopper position adjusting shaft 24 screwed into the tool main body 22 b is moved in a direction retracting from the optical axis, and the rotation restricting plate 12 is biased in the moving direction 53 a by the spring 14. Therefore, the rotation restricting plate 12 is positioned at the position shown in FIG.

  In the present embodiment, the stopper 11, the rotation restricting plate 12, the spring 14, and the stopper position adjusting shaft 24 have one end (front end) in a range where the cam groove and the cam follower are in sliding contact with the first end as the first end. A restriction mechanism that switches between the second end portion that gives a wider range than the end portion is configured.

  Next, the structure for adjusting the eccentricity of the lens 50 in this embodiment will be described with reference to FIG. At the time of eccentricity adjustment, the stopper position adjusting shaft 24 connected to the tool main body 22b via a screw is rotated to feed the screw in the moving direction 53b. That is, the stopper position adjusting shaft 24 is screwed in a direction approaching the optical axis. At this time, since the tip of the stopper position adjusting shaft 24 is in contact with the rotation restricting plate 12, the rotation restricting plate 12 moves in the moving direction 53b along the guide shaft 13 while being pressed by the stopper position adjusting shaft 24. It will be in the state of 6 (b). When the rear scale ring 33b is rotated clockwise in FIG. 6, the stopper contact surface 15b of the stopper 11 closer to the optical axis than the stopper contact surface 15a contacts the rotation restricting plate end surface 16 of the rotation restricting plate 12. Then the rotation stops. Since the outer diameter of the stopper contact surface 15b of the stopper 11 is smaller than the outer diameter of the stopper contact surface 15a, the rotation is restricted in a state where the stopper 11 is rotated more clockwise than the wide-angle operation end described above. That is, the rotation is restricted at a position further rotated by the radius difference between the stopper contact surfaces 15a and 15b than in the state of FIG. In this state, as in the first embodiment, the eccentric adjustment shaft 21 is used to adjust the position of the lens 50 in a plane perpendicular to the optical axis 52 as in the first embodiment. When the lens holding unit 4 is eccentrically adjusted to a desired optical axis, the eccentric adjustment shaft 21 is rotated and the push pin 20 is pushed. When the pushing force becomes larger than necessary, the lens holding unit 4 is fixed to the movable cylinder 3. A load is also applied to the cam follower 7, which may lead to deformation of the cam groove 6. The rotation operation end shown in FIG. 6 shown in this embodiment is a range of the cam groove 6 that is not used when a lens is used as a product. Therefore, even if the cam groove 6 is deformed, the cam follower 7 is not in contact with the deformed portion in the product use state, and the operability of the rear scale ring 33b is not impaired.

  As described above, according to the lens device of the present embodiment, in addition to the effects described in the first embodiment, even if the cam groove 6 is deformed at the time of eccentricity adjustment, the operability is impaired in the product use state. It is possible to provide an effect that it is possible to provide a non-lens device.

  The lens apparatus of the present embodiment will be described with reference to FIG. FIG. 7 is a partial cross-sectional view of the lens apparatus when the decentration adjustment is performed in the present embodiment.

  The basic configuration of the lens apparatus of this embodiment is the same as that of the lens apparatus of the first embodiment shown in FIG. 1, but as a characteristic configuration, the moving cylinder 3a of the first embodiment has the same structure. Instead, it has a connecting ring 10b instead of the movable cylinder 3b and the connecting ring 10a.

  The movable cylinder 3b has a movable cylinder fitting portion 17 that is fitted to the inner diameter portion of the connecting ring 10b. On the wide angle side where the eccentricity adjustment is performed, the movable tube fitting portion 17 is fitted with the connecting ring (fixed tube fitting portion) 10b, and when zooming to the telephoto side (moving in a direction away from the front end portion). ) Disengagement. When the lens holding portion 4 is eccentrically adjusted to a desired optical axis, the eccentric adjustment shaft 21 is rotated and the push pin 20 is pushed. When the pushing force is larger than expected, the lens holding portion 4 is fixed to the movable cylinder 3. A load is also applied to the cam follower 7, which may lead to deformation of the cam groove 6. Therefore, the load applied to the cam follower 7 is reduced by fitting the movable cylinder fitting portion 17 with the inner diameter of the connecting ring 10b only on the wide angle side where eccentricity is adjusted.

  As described above, according to the present embodiment, in addition to the effects described in the first embodiment, the load applied to the cam follower 7 at the time of eccentricity adjustment can be reduced, so there is no fear of dents on the cam groove.

  Realizing an imaging apparatus capable of adjusting the eccentricity, which enjoys the effects of the present invention, by the imaging apparatus having the lens apparatus described in the above embodiment and an imaging element that receives subject light from the lens apparatus. Can do.

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

DESCRIPTION OF SYMBOLS 1 Lens apparatus 2a, 2b Tool insertion hole 3a, 3b Moving cylinder 4 Lens holding part 5 Cam (cam cylinder)
6 Cam groove 7 Cam follower 8a, 8b Fixed cylinder 21 Eccentric adjustment shaft

Claims (9)

A lens holding part for holding the lens;
A moving cylinder that holds the lens holding portion and includes a cam follower;
A cam cylinder having a cam groove in sliding contact with the cam follower;
A fixed cylinder having a guide groove extending in the optical axis direction and slidingly contacting the cam follower;
A lens device comprising:
The cam groove and the guide groove are configured to determine the position of the movable cylinder in the optical axis direction by the rotation angle of the cam cylinder around the optical axis with respect to the fixed cylinder,
The moving cylinder protrudes from the end of the cam cylinder in the optical axis direction at one moving end, and a position of the lens holding portion with respect to the moving cylinder in a plane perpendicular to the optical axis at the protruding portion. Has an eccentric adjustment mechanism to adjust
The fixed cylinder has a tool insertion hole into which an adjustment tool for operating the eccentricity adjustment mechanism can be inserted from the outside in the radial direction.
A lens device. The lens holding part is in contact with the moving cylinder and a surface perpendicular to the optical axis, and the lens holding part is urged by the elastic member to the contact surface with the moving cylinder,
The eccentricity adjustment mechanism includes a pressing unit that presses the lens holding portion toward the radial center.
The adjustment tool is in contact with the pressing means and presses the pressing means toward the radial center.
The lens device according to claim 1. The adjustment tool has a tool body that is detachably fixed to the fixed cylinder, and an eccentric adjustment shaft that is screwed into a screw hole that passes through the tool body,
The eccentric adjustment shaft has a flat surface that comes into contact with a radially outer surface of the pressing means via the tool insertion hole,
The eccentric adjustment shaft presses the pressing means toward the radial center by a screw mechanism with the tool body.
The lens apparatus according to claim 2. The eccentric adjustment mechanism has the four pressing means at positions where the movable cylinder is equally divided into four in the circumferential direction,
The fixed cylinder has four tool insertion holes at positions corresponding to the four pressing means of the movable cylinder,
The lens device according to claim 2 or 3, wherein   On the radially outer side of the fixed cylinder, there is an operation ring that slides on the fixed cylinder and rotates around the optical axis. The operation ring is penetrated when the adjustment tool penetrates the tool insertion hole. 5. The lens device according to claim 1, wherein the through-hole portion is closed by an operation assisting member of the operation ring.   The fixed cylinder is composed of a plurality of parts that can be divided in the optical axis direction, and the plurality of parts are fixed to each other by a fastening means that is inserted from the through hole provided in the operation ring. The lens device according to any one of claims 1 to 5. A restriction mechanism that switches one end of a range where the cam groove of the cam cylinder and the cam follower are in sliding contact with each other between a first end and a second end that gives a wider range than the first end;
The end of the range where the cam groove and the cam follower are in sliding contact with each other is switched to the second end by the restriction mechanism, and the cam groove and the cam follower are outside the range restricted by the first end. The eccentric adjustment of the lens holding portion by the eccentric adjustment mechanism is performed.
The lens device according to claim 1, wherein the lens device is a lens device.   At the position where the adjustment tool abuts against the pressing means and presses the pressing means toward the radial center, the moving cylinder has a moving cylinder fitting portion that fits into the fixed cylinder fitting portion of the fixed cylinder. The fixed tube fitting portion and the movable tube fitting portion restrict movement of the movable tube in the radial direction with respect to the fixed tube. Lens device.   An image pickup apparatus comprising: the lens apparatus according to claim 1; and an image pickup element that receives subject light from the lens apparatus.

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