| 摘要 |
Systems are described for precisely positioning motion picture film frames at a camera film gate by the use of registration pins that project into film perforations, where the film frames are spaced by 2.5 perforations instead of the standard 4 perforations. In one system, the registration mechanism includes two sets of registration pins which project into film frames as the film is advanced in steps of 2.5 perforations. In another system, additional holes are punched into the standard film stock, so there are holes or perforations located at 2.5 perforation spacings along the length of the film, so only one set of registration pins is required for precision registration of film frames spaced by 2.5 perforations.
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