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BKSTS Illustrated Dictionary of Moving Image Technology, 4th Edition by Martin Uren

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R

raxk: (1) See equipment rack. (2) A device for carrying film in a developing machine. (3) To adjust the exposure of a studio or outside broadcast video camera.

rack bars: The black lines between image frames on photographic film.

racking: (1) Another term for framing. (2) Rotating the turret on an old video or film camera to change the lens being used. (Hist.) (3) UK term for controlling the exposure and colour matching of studio video cameras from the gallery. See also shading.

rack-over: A movement to bring the viewfinder (2) of a film camera into line with its objective lens system.

radian: SI unit of angle, where 2π radians are equal to 360 degrees.

Radio Authority: UK government body which licenses and regulates all independent radio services. ...

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