Abstract: A mechanism for attaching and detaching a tripod seat, comprising: a first tripod seat unit; and a second tripod seat unit to which the first tripod seta unit is detachably attached, wherein: one of the first tripod seat unit and the second tripod seat unit has a first fixing member and a second fixing member formed to be screwed together; the other of the first tripod seat unit and the second tripod seat unit has an attachment part brought to be in pressure contact with the second fixing member by screwing the first fixing member to the second fixing member; and by bringing the attachment part to be in pressure contact with the second fixing member, the first tripod seat unit is fixed to the second tripod seat unit.

Abstract: A lens barrel includes a movable device to adjust an optical system, an operation section, and a display section. The operation section has a coupling section to be coupled with the movable device to control movement of the movable device. The display section is disposed in line with the operation section in a direction around an optical axis of the lens barrel to overlap with the operation section in a direction of the optical axis. The display section includes a display body that is movable in displaying a state of the optical system adjusted by the movable device. The display body of the display section is disposed to overlap the coupling section of the operation section in a radial direction of the lens barrel.

Abstract: A lens barrel includes a movable device to adjust an optical system, an operation section, and a display section. The operation section has a coupling section to be coupled with the movable device to control movement of the movable device. The display section is disposed in line with the operation section in a direction around an optical axis of the lens barrel to overlap with the operation section in a direction of the optical axis. The display section includes a display body that is movable in displaying a state of the optical system adjusted by the movable device. The display body of the display section is disposed to overlap the coupling section of the operation section in a radial direction of the lens barrel.

Abstract: A mechanism for attaching and detaching a tripod seat, comprising: a first tripod seat unit; and a second tripod seat unit to which the first tripod seta unit is detachably attached, wherein: one of the first tripod seat unit and the second tripod seat unit has a first fixing member and a second fixing member formed to be screwed together; the other of the first tripod seat unit and the second tripod seat unit has an attachment part brought to be in pressure contact with the second fixing member by screwing the first fixing member to the second fixing member; and by bringing the attachment part to be in pressure contact with the second fixing member, the first tripod seat unit is fixed to the second tripod seat unit.

Abstract: A lens barrel includes: a cam cylinder on which a plurality of cam grooves is formed; a plurality of lens groups that has equal to or more than one lens each; and a plurality of lens-holding frames that integrally holds the lens per lens group, has a cam follower each that engages with each cam groove, and is moved along an optical axis direction along a track of each cam groove, each lens-holding frame having: a lens supporting part; and a cylindrical part, and on an outer circumferential surface of which the cam follower is protrusively provided, wherein an inner circumferential part corresponding to a position of the cam follower in the cylindrical part of each lens-holding frame and a cylindrical part of a lens-holding frame positioned on an image plane side are arranged to always overlap in the optical axis direction.

Abstract: A lens barrel includes a plurality of lens groups including a retractable lens group, a plurality of lens retaining frames to retain the plurality of lens groups, a movable lens barrel to retain the plurality of lens retaining frames therein, and a fixed cylinder portion to retain the movable lens barrel therein. The plurality of lens retaining frames, the movable lens barrel and the fixed cylinder portion are configured to move the plurality of lens groups between a collapsed state with at least one portion of the plurality of lens groups collapsed and a photographing state. The plurality of lens retaining frames include a retractable lens retaining frame configured to movably retain the retractable lens group so as to position the plurality of lens groups in photographing positions on a single optical axis in the photographing state and to retract the retractable lens group to a retracted position outside an inside diameter position of the fixed cylinder portion in the collapsed state.

Abstract: A lens barrel includes lens groups, lens retaining frames retaining the lens groups, respectively, between a collapsed state and a photographic state are moved toward an object side, a movable cylinder retaining the plurality of lens retaining frames therewithin, and a driving mechanism to move the lens retaining frames.

Abstract: A lens barrel includes: a lens holder which holds a lens group and includes a cam follower; a rotating cylinder including on a circumferential surface thereof a cam groove; a guide member to which the rotating cylinder is rotatably provided, which guides the lens holder to move in an optical axis direction; and a transmission member which transmits a drive force outputted from a drive source to the rotating cylinder. When the drive force is transmitted and the rotating cylinder rotates, the lens holder is guided in the optical axis direction and the cam groove has contact with the cam follower, and thereby the lens holder moves back and forth in accordance with a rotation posture of the rotating cylinder. The transmission member is provided on a more inner side than one, which is provided on an outermost side, of the lens holder, the guide member, and the rotating member.

Abstract: A lens barrel includes: a cam cylinder on which a plurality of cam grooves is formed; a plurality of lens groups that has equal to or more than one lens each; and a plurality of lens-holding frames that integrally holds the lens per lens group, has a cam follower each that engages with each cam groove, and is moved along an optical axis direction along a track of each cam groove, each lens-holding frame having: a lens supporting part; and a cylindrical part, and on an outer circumferential surface of which the cam follower is protrusively provided, wherein an inner circumferential part corresponding to a position of the cam follower in the cylindrical part of each lens-holding frame and a cylindrical part of a lens-holding frame positioned on an image plane side are arranged to always overlap in the optical axis direction.

Abstract: A lens barrel includes a plurality of lens groups including a retractable lens group, a plurality of lens retaining frames to retain the plurality of lens groups, a movable lens barrel to retain the plurality of lens retaining frames therein, and a fixed cylinder portion to retain the movable lens barrel therein. The plurality of lens retaining frames, the movable lens barrel and the fixed cylinder portion are configured to move the plurality of lens groups between a collapsed state with at least one portion of the plurality of lens groups collapsed and a photographing state. The plurality of lens retaining frames include a retractable lens retaining frame configured to movably retain the retractable lens group so as to position the plurality of lens groups in photographing positions on a single optical axis in the photographing state and to retract the retractable lens group to a retracted position outside an inside diameter position of the fixed cylinder portion in the collapsed state.

Abstract: A lens barrel includes lens groups, lens retaining frames retaining the lens groups, respectively, between a collapsed state and a photographic state are moved toward an object side, a movable cylinder retaining the plurality of lens retaining frames therewithin, and a driving mechanism to move the lens retaining frames.