| 摘要 |
A camera is capable of forming different photographic image plane frames by causing a light blocking member which is movable in at least a photographic optical path to block part of a photographic light flux. The camera is provided with an urging member for imparting an urging force to the light blocking member, the direction of the urging force being changed when the light block member is located at a particular position in its movement course, a switching member arranged to switch its state at a point in a process in which the light blocking member moves from its maximum retracted position where the smallest amount of light flux is blocked to the particular position, and a display member for visually displaying the state of movement of the light blocking member, i.e., which of the photographic image plane frames has been formed, in accordance with the state of the switching member. In the above arrangement, during a photographic image plane frame switching operation, even if the light blocking member stops at or near the particular position and an imperfect photographic image plane frame is formed, a photographer can be informed that the photographic image plane frame as formed at least does not correspond to a photographic image plane frame state obtainable when the light blocking member is located at the maximum retracted position.
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