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Academy ratio 1.375:1. The Academy ratio of 1.375:1 (abbreviated as 1.37:1) is an aspect ratio of a frame of 35 mm film when used with 4-perf pulldown. [1] [2] It was standardized by the Academy of Motion Picture Arts and Sciences as the standard film aspect ratio in 1932, although similar-sized ratios were used as early as 1928.
Some formats are referred to in terms of the ratio "perforations per frame/gauge size" to provide an easy way of denoting size. For instance, 35mm Academy is also known as 4 perf-35mm; VistaVision is 8 perf-35mm; the long-time standard Todd-AO 70 mm film is 5 perf-70mm; and IMAX is 15 perf-70mm. This description does not indicate whether the ...
35 mm film is a film gauge used in filmmaking, and the film standard. [1] In motion pictures that record on film, 35 mm is the most commonly used gauge. The name of the gauge is not a direct measurement, and refers to the nominal width of the 35 mm format photographic film, which consists of strips 1.377 ± 0.001 inches (34.976 ± 0.025 mm) wide.
The majority of 35 mm film systems, cameras, telecine equipment, optical printers, or projectors, are configured to accommodate the 4-perf system; each frame of 35 mm is 4 perforations long. 4-perf was (and remains) the traditional system, and the majority of projectors are based on 4-perf, because 4 perforations is the amount needed per frame vertically in order to have enough negative space ...
A Techniscope camera film frame. Techniscope or 2-perf is a 35 mm motion picture camera film format introduced by Technicolor Italia in 1960. [1] The Techniscope format uses a two film-perforation negative pulldown per frame, instead of the standard four-perforation frame usually exposed in 35 mm film photography.
4 perf, 2 sides spherical 60 mm 1.40 spherical Sivan-Dalphin: Casimir Sivan and E. Dalphin: 1896 38 mm 2 perf, 2 sides spherical 38 mm spherical Veriscope: Enoch Rector: 1897 The Corbett-Fitzsimmons Fight: 63 mm 1.66 1.875" × 1.125" 5 perf, 2 sides spherical 63 mm spherical Viventoscope: Thomas Henry Blair: 1897 48 mm 1.50 1.500" × 1.000" 1 ...
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Just as VistaVision had a few flagship engagements using 8-perf horizontal contact prints and special horizontal-running projectors, there is a bit of evidence [citation needed] that horizontal prints were envisioned for Technirama as well (probably with 4-track magnetic sound as in CinemaScope), but to what extent this was ever done ...