Patent ID: 7929228

Claim:
An image pickup apparatus comprising a lens barrel, wherein said lens barrel includes: a fixture cylinder fixed onto an image pickup apparatus body, the fixture cylinder including a supporting member and a plurality of cam grooves; a movement cylinder that includes a plurality of cam followers and a supported member that is provided to a part of the movement cylinder on an image plane side, and is configured to move in an optical axis direction as the cam follower rotates around an optical axis; and an elastic member, wherein one of the plurality of cam grooves has a non-engagement area in which the cam follower is not engaged with the one cam groove, and wherein when the cam follower is located in the non-engagement area, the supporting member of the fixture cylinder supports in a radial direction the supported member of the movement cylinder, and a part of the movement cylinder closer to the object side than the supported member is supported by the fixture cylinder in the radius direction via the elastic member.