Exposure control shutter of a camera

摘要

An exposure control shutter of a camera having an exposure opening, comprising first and second plane shutter blades, each shutter blade having a relatively large aperture and a relatively small aperture. The first and second shutter blades, one being disposed top of the other, are slidingly movable with respect to each other from a neutral position in which the camera exposure opening is closed to either a first exposure position in which the relatively large apertures of the first and second shutter blades meet in the camera exposure opening to define a low-speed, large-aperture-size exposure or a second exposure position in which the relatively small apertures meet in the camera exposure opening to define a high-speed, small-aperture-size exposure. A spring is provided for biasing the first and second shutter blades to maintain them in the neutral position. A transmission lever is provided for simultaneously actuating the first and second shutter blades against the spring so as to move them selectively to the first or second exposure position and for simultaneously releasing them to the neutral position.