| 摘要 |
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. |
