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A widescreen image is a film image with a greater aspect ratio than the ordinary 35 millimeter frame.

The aspect ratio of a standard 35 millimeter frame is around 1.37:1, although cameramen may use only the part of the frame which will be visible on a television screen (which is 1.33:1 for standard television). Viewfinders are typically inscribed with a number of frame guides, for various ratios.

Note that aspect ratio refers here to the projected image. There are various ways of producing a widescreen image of any given proportion.

See also: motion picture terminology, letterbox, pan and scan, IMAX

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