7.2.1 Film Chains (various methods used to display film on television or videotape)
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This article is from the rec.arts.movies.tech FAQ, by Scott E. Norwood snorwood@nyx.nyx.net with numerous contributions by others.
7.2.1 Film Chains (various methods used to display film on television or videotape)
The equipment used to display film on television is known as
`telecine' equipment, and comes in two basic varieties. The older and
cheaper type (called a `film chain') involves a standard movie
projector whose shutter blades have been modified so as to sync with
the television camera, eliminating the `flicker' which appears when an
unmodified projector is used. This modified projector is set up to
project into a `multiplexer' which directs the light through a field
lens (by means of several high-quality mirrors) and into a telecine
camera (a high-quality three-tube or three-chip television camera,
whose lens is attached to the screen, so as to photograph the
projected images. This setup can `reverse' black-and-white negative
film to produce positive images, but cannot do so with color negative,
due to the complex color shifting which must be achieved due to the
orange-y tint of color negatives. Also, this system is incapable of
anything beyond very basic color and exposure correction, making it
unsuitable for production work, but useful for low-end television
stations, which need to broadcast from release prints.
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