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Projection gauge is the film gauge (width) used for the release print. Projection aspect ratio is the image ratio determined by the ratio of the projection dimensions multiplied by the anamorphic power of the projection lenses (1× in the case of spherical lenses). This is also known as the intended theatrical aspect ratio.
The primary characteristic of a film format is its size and shape. In the case of motion picture film, the format sometimes includes audio parameters. Other characteristics usually include the film gauge , pulldown method, lens anamorphosis (or lack thereof), and film gate or projector aperture dimensions, all of which need to be defined for ...
70 mm film (or 65 mm film) is a wide high-resolution film gauge for motion picture photography, with a negative area nearly 3.5 times as large as the standard 35 mm motion picture film format. [1] As used in cameras, the film is 65 mm (2.6 in) wide. For projection, the original 65 mm film is printed on 70 mm (2.8 in) film.
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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.
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Film gauge is a physical property of photographic or motion picture film stock which defines its width. Traditionally, the major movie film gauges are 8 mm , 16 mm , 35 mm , and 65/70 mm (in this case 65 mm for the negative and 70 mm for the release print; the extra five millimeters are reserved for the magnetic soundtrack).
Because the resulting, new, Super 16 aspect ratio takes up the space originally reserved for the 16mm soundtrack, films shot in this format must be enlarged by optical printing to 35 mm for sound-projection, and, in order to preserve the proper 1.66:1, or (slightly cropped) 1.85:1 theatrical aspect ratios which this format was designed to provide.