This is the type of camera used between 1935 and 1953 for shooting Technicolor motion pictures. It uses three separate films to obtain colour records of the three colours - red, blue and green. Behind the lens is a beam-splitting mirror which divides the light beam into two portions. One portion (transmitted by the mirror) provides the green record, the other portion (reflected by the mirror) provides the blue and red records. Since 1953, Technicolor motion pictures have been taken in conventional cine cameras using tripack colour film.
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