| 摘要 |
A lens shutter for a single lens reflex camera having two pivotally mounted superposed sectors operable, in timed relationship with a camera mirror, from one side of a shutter or exposure aperture sequentially in a similar sequence each first closing the exposure aperture and then opening it during travel, in a common direction, to an opposite side of the exposure aperture for taking an exposure. A delay or timing circuit is provided for controlling the exposure time by one of the sectors. The timing with the mirror is such that in effect one sector opens the shutter and the other closes it.
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