Film gauge is a physical property of film stock which defines its size. Traditionally the major film gauges in usage 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). There have been other historic gauges in the past, especially in the silent era, most notably 9.5 mm film, as well as a panopoly of others ranging from 3 mm to 75 mm. Film stock is the term for photographic film on which films are recorded. ... 8 mm film is a motion picture film format in which the filmstrip is eight millimeters wide. ... 16 mm film was introduced by Eastman Kodak in 1923 as an inexpensive amateur alternative to the conventional 35 mm film format. ... 35 mm film frames. ... 70 mm film (or 65 mm film) is a high-resolution film stock, of superior quality to standard 35 mm motion picture film format. ... Three frames of 9. ...
See also
Film format, which film gauge is sometimes confused with. While film gauge comprises part of a film format's definition, a film format also includes the standards for image capture and projection.
// Movie film formats Amateur formats: 8 mm Single-8 Super 8 mm Polavision 9,5 mm film 17. ...
The introduction of sound-on-film film formats (as opposed to sound-on-disc formats) in 1930, meant that room had to be found on the film strip for the sound track.
While all film frames are rectangular, the image area's rectangularity is measured by its aspect ratio or the ratio of the frames horizontal dimension to its vertical dimension with a perfect square having a 1:1 aspect ratio.
The first film shot in the process was The Raintree Country (1957), however, the film was released in 35mm reduction prints, since MGM claimed that there were not enough 70mm projectors in the theatres.
After the film is developed at the laboratory, it is slit down the middle and the pieces are spliced together, resulting in an 8mm film.
Unlike other gauges, the `pressure plate' (the piece which provides pressure on the back of the film in the gate area, in order to ensure that the film lies flat when it is exposed) is plastic and is built into the cartridge.
The film itself comes either wound tightly around a plastic `core,' for loading into a camera magazine (either in a darkroom, or a portable `changing bag'), or, for 100' and 200' lengths, mounted on small metal spools (like those for regular 8mm), which can be loaded into the camera in moderately bright daylight.
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