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Why were widescreen movies sometimes panned and scanned for television?

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Director Steven Spielberg and camera operator Michael Chapman film next to a large mechanical shark on the set of the 1975 movie Jaws. — motion-picture technology Director Steven Spielberg holding the movie camera, assisted by camera operator Michael Chapman, during the filming of *Jaws* (1975).

Widescreen movies were panned and scanned for television because of the significant difference between the aspect ratio of theatrical films and the standard television screen.

In the 1950s, the film industry introduced wide-screen formats like CinemaScope to differentiate the theatrical experience from television, which had standardized its image at a 1.33 to 1 ratio. When these wide-screen films—which could have ratios as wide as 2.55 to 1—were later broadcast on television, the full width of the image could not fit within the narrower television frame without leaving large empty spaces at the top and bottom of the screen.12

To fill the television screen, the "pan and scan" process was used. This technique involves selecting a portion of the original wide-screen image that fits the television's dimensions and electronically "panning" the camera view across the original frame to follow the action or important subjects. While this allowed the image to fill the screen, it often resulted in the loss of significant portions of the original composition intended by the filmmaker.32