perfed
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35 mm film — is the basic film gauge most commonly used for both still photography and motion pictures, and remains relatively unchanged since its introduction in 1892 by William Dickson and Thomas Edison, using film stock supplied by George Eastman. The… … Wikipedia
Film perforations — Film perforations, also known as perfs, are the holes placed in the film stock during manufacturing and used for transporting (via sprockets and claws) and steadying (via pin registration) the film. Films may have different types of perforations… … Wikipedia
