Focal-Plane Shutter
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focal-plane shutter
[′fō·kəl ‚plān ′shəd·ər] (optics)
A camera shutter consisting of a blind containing a slot; the blind is pulled rapidly across the film, exposing it through the slot.
Focal-Plane Shutter
a camera shutter positioned near the focal plane of the lens, consisting of two opaque blinds that form a slit of variable width or a single blind with a slit cut in it.