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]
- ^ a b Monaco, James. How to Read a Film: The Art, Technology, Language, History and Theory of Film and Media. Rev. ed. New York: Oxford University Press, 1981. ISBN 0-19-502806-6.
- ^ a b Bordwell, David and Thompson, Kristin. Film Art: An Introduction. Rev. ed. New York: McGraw-Hill, 1993. ISBN 0-07-006446-6.