1. Apparatus for positioning the taking lens means of a camera comprising: housing means carrying the lens means and movable along a first path; a first member positioned a predetermined space from the housing means in the first path, the housing means moving in the first path, contacting the first member and being restrained from further movement in a first position after the housing means has contacted the first member; and spacing means operable to move into and out of the predetermined space and operable when in the predetermined space to cause the housing means in its movement in the path to contact the spacing means, said housing means and said spacing means thereafter moving together in the first path, contacting the first member and being restrained from further movement with the housing means in a position other than the first position after the housing means together with the spacing means has contacted the first member.