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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.
35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...
135 film. The film is 35 mm (1.4 in) wide. Each image is 24×36 mm in the most common "small film" format (sometimes called "double-frame" for its relationship to the "single-frame" 35 mm movie format or full frame after the introduction of 135 sized digital sensors; confusingly, "full frame" was also used to describe the full gate of the movie format half the size).
A VistaVision 35 mm film frame (the dotted area shows a 1.85:1 aspect ratio crop). VistaVision is a higher resolution, widescreen variant of the 35 mm motion picture film format that was created by engineers at Paramount Pictures in 1954.
Sound on film can be dated back to the early 1880s, when Charles E. Fritts filed a patent claiming the idea. In 1923 a patent was filed by E. E. Ries, for a variable density soundtrack recording, which was submitted to the SMPE (now SMPTE), which used the mercury vapor lamp as a modulating device to create a variable-density soundtrack.
The latter film was shot with two 65 mm Todd-AO cameras simultaneously, the speed of the second camera was 24 frames per second for wide release as optical reduction prints. All subsequent Todd-AO films were shot at 24 frames per second on a 65 mm negative and optically printed to 35 mm film as needed for standard distribution. [8]
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The 35 mm film gauge has long been the most common gauge in professional usage, and thus enjoys the greatest number of cameras currently available for professional usage. The modern era of 35 mm cameras dates to 1972, when Arri 's Arriflex 35BL and Panavision 's original Panaflex models emerged as the first self-blimped, lightweight cameras.