Quarter Inch:
A reference to the standard width magnetic audio tape which is used to record film production sound. (Sound)
Quartz:
Tungsten-Halogen lights or lighting units. The name is derived from the material which encloses the lighting element. (Lighting)

Rack: A frame carrying film in a processing machine. Ofter used to refer to frame edit alignment in which the projected film remains properly framed on the screen (in rack). (Laboratory)

Rank: A shortened term which refers to a "Rank-Cintel Flying Spot Scanner". This is a telecine device which transfers a film image into electronic signals which are then recorded on to video tape.

Reaction Shot: A shot of a player listening while another player's voice continues on the sound track. (Production)

Redhead: An open faced 1K lighting unit. Also known as a 'Mickey'. (Lighting)

Reduction Printing: The production of a copy of a film which is of a smaller size or gauge than the original (i.e. 35mm to 16mm). This is done of an optical printer. (Laboratory)

Relational Editing: Editing of shots for the purposes of comparison or for the contrast of content. (Film Editing)

Release: The general distribution of a film for public exhibition.

Release negative: A duplicate negative from which release prints are made. (Film Editing)

Re-recording: The process of mixing all edited music, effects and dialog tracks of a film or video production to mono, stereo, multichannel or whatever audio format is desired for the final print master.

Resolving: The process of regulating tape speed by comparing a reference signal on the tape with an external reference and adjusting the speed so that they match.

Reverberation: The presence or persistence of sound due to repeated reflections.

Reversal film: A film that is manufactured and processed in such a way as to produce a positive image after exposure. (Film Editing)

Reversal Intermediate: A second generation duplicate which is reversed to make it the same type, negative or positive, as the original. It is used for printing in order to protect the original. (Film Editing)

Reversal Original: A reversal film designed to be exposed in a camera. (Film Editing)

Reverse Action: An optical effect in which the action appears backwards from its chronological sequence. (Laboratory)

Reverse Angle: A shot that is turned approximately 180 degrees in relation to the preceding shot. (Cinematography)

Rim: A hard backlight, is generally on the same level as the subject, that casts more light than the key light. (Lighting)

Riser:
(1) A cylindrical metal device placed betwen the dolly head and the camera base to raise the camera.
(2) A prebuilt platform used to raise the set, camera, or lights. (Grip/Lighting)

RMS (root-mean-square): Effective sound pressure. (Acoustics)

Room Tone: The "noise" of a room, set or location where dialog is recorded during Production. Used by film and dialog editors as a "bed" to form a continuous tone through a particular scene. This is often confused with ambience, which might be sound effects and/or reverberation added when the dialog is mixed.

Rough cut: A preliminary trial stage in the process of editing a film. Shots are laid out in approximate relationship to an end product without detailed attention to the individual cutting points. (Film Editing)

Run of the Picture: A cast member whose work may be required any of the days scheduled for principal photography without incurring liability for additional compensation.

Rushes: This refers to daily prints of a film used for evaluation purposes. (Laboratory)