2.5.1 35mm (old silent frame) (Motion Picture Formats - original cinematography)
Description
This article is from the rec.arts.movies.tech FAQ, by Scott E. Norwood snorwood@nyx.nyx.net with numerous contributions by others.
2.5.1 35mm (old silent frame) (Motion Picture Formats - original cinematography)
Early films were all shot with this camera apeture prior to the advent
of sound-on-film. When sound was first introduced, a variety of odd
aspect ratios (including an almost 1:17 square picture) were
considered, as the image area had to be narrowed in order to leave
space for the soundtrack. Silent 35mm films were shot at roughly 16
frames per second (fps), using hand-cranked cameras and projectors. In
practice, speed varied substantially even throughout a single roll,
and among different titles.. For this reason, running times are almost
never listed for silent films; instead, length is listed as number of
reels or number of feet. The advent of sound standardized filming
speed at 24 fps. When silent films are shown today at 24fps, they
often appear `sped up' and tend to look unnatural.
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