Patent ID: 7911721

Claim:
A lens barrel comprising: an optical system; an operation ring to be operated to rotate around the optical system of the lens barrel; a rotary member capable of rotating in conjunction with the rotational operation of the operation ring; a transducer that is in contact with the rotary member and is capable of moving around the optical system and the rotary member; and a rotatable frame member that is capable of moving around the optical system within a predetermined angle range and supports the transducer, wherein, upon the operation ring being rotated manually, the operation ring drives and rotates the rotary member, the rotary member causing the rotatable frame member to rotate integrally with the transducer to move at least a part of the optical system in an optical axis direction, and upon the transducer being driven by a drive signal, the transducer moving with respect to the rotary member at rest, to thereby rotate the rotatable frame member around the optical system to move at least a part of the optical system in an optical axis direction.