Assertion: focal plane shutter | /r/HasProperty | positioned in front of the film
Facets:
Source sentences:
text: A focal-plane shutter is positioned just in front of the film, in the focal plane, and moves an aperture across the film until the full frame has been exposed.
text: A focal-plane shutter is positioned just in front of the film, in the focal plane, and moves an aperture across the film until the full frame has been exposed.