Camera having operation member on rear cover thereof, variable picture size camera and picture size switching mechanism, and click stop mechanism

摘要

A picture size switching mechanism for a variable picture size camera includes a stationary standard picture plane forming member and a pair of light interception frames having light interception portions which can obstruct upper and lower edges of the standard picture frame and are movable in the upward and downward direction to selectively define a standard picture plane or a laterally elongated picture plane. A light interception frame association mechanism moves one of the light interception frames symmetrically with the other light interception frame with respect to the center of the picture plane when the other light interception frame is moved in the upward and downward direction. A follower pin is provided on one of the light interception frames and a rotatable cam member is supported by the camera body to rotate about an axis substantially perpendicular to the picture plane.