Patent ID: 8314877

Claim:
A lens barrel, comprising: lens groups which constitute an imaging optical system; a lens frame which retains at least one of the lens groups; a retaining frame which retains the lens frame; and cam members, each of which includes a cam face, the cam members being arranged between the lens frame and the retaining frame, and each of the cam members being formed in a partial circular arc shape, and wherein each of the cam members is capable of moving separately, wherein the cam face provided on each of the cam members includes a reference plane which is perpendicular to an optical axis direction and formed at a nearly center position of a length direction along the circular arc on the cam face, and the cam face has a height that changes continuously in the optical axis direction, and is formed before and after the reference plane, wherein the lens frame includes abutted parts which abut on the cam faces of the cam members, wherein the cam members are arranged in a circular arc shape concentric with the lens frame, and wherein the height of the cam faces on which the abutted parts of the lens frame abut is changed by moving at least one of the cam members centered on a center axis of the lens frame on a plane perpendicular to an imaging optical axis of the lens barrel, and tilt of the lens frame relative to the retaining frame is changed.