Definitions for "Focal-plane shutter"
Keywords:  curtain, slit, shutter, plane, camera
A built-in camera mechanism containing a metal or fabric curtain for exposing film. It sits in front of the focal plane (just in front of the film).
A shutter located near the focal plane; usually consisting of a curtain with a slot which is pulled across the focal plane to make the exposure.
A camera mechanism that admits light to expose film by opening a slit just in front of the film (focal) plane.