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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.
The 135 film size is derived from earlier still cameras using lengths of 35 mm movie film, which had the same size but with different perforations. The 35 mm film standard for motion picture film was established in Thomas Edison's lab by William Kennedy Laurie Dickson. [6]
As with film, due to the increased size of the imaging chip (up to twice that of a 35 mm film frame, and thus as much as 40 times the size of the chip in a typical pocket point-and-shoot camera) they deliver more pixels than consumer-grade cameras, and have lower noise. Features like fan cooling also improve the image quality of studio models.
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 ...
A cartridge of Kodak 35 mm (135) film for cameras. A film format is a technical definition of a set of standard characteristics regarding image capture on photographic film for still images or film stock for filmmaking. It can also apply to projected film, either slides or movies. The primary characteristic of a film format is its size and shape.
English: Standard dimensions for 35mm film, as laid out in (January 1965). "Motion-Picture Film — Its Size and Dimensional Characteristics". Journal of the SMPTE 74: 3–11. Society of Motion Picture and Television Engineers. Retrieved on 30 August 2018.. KS-1870 stock assumed (Kodak Standard perforation shapes, 0.187" nominal pitch).