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Academy ratio
Aspect ratio with a width of 1.37:1 / From Wikipedia, the free encyclopedia
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.[1][2]
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