Film gauge
Film gauge is a physical property of photographic or motion picture film stock which defines its width. 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 panoply of others ranging from 3 mm to 75 mm.
In the packaging industry, "gauge" refers to the thickness of plastic sheeting (film) rather than its width. Gauge is usually expressed in units of 0.00001 inches. A 48 gauge (48 Ga or 48 ga) film is 0.00048 inches thick. The gauge unit is most commonly used to describe polyester, polypropylene, and sometimes nylon films in North America as the United States is still dependent on the United States customary units system. Microns are more commonly used in other parts of the world where the metric or SI systems are standard.
[edit] See also
- Film format, with which film gauge is sometimes confused. While film gauge comprises part of a film format's definition, a film format also includes the standards for image capture and projection.
[edit] External links
- One hundred years of film sizes
- Running time calculator according to gauge, length and frame rate of the film
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