J
 

Jack

A socket or receptacle into which a mating plug is inserted in order to make an electrical connection.

Jam Sync

A process of locking a time code generator to an existing coded tape in order to extend or replace the code, used when code is of poor quality.

Japanese Lantern

A paper-covered wire frame globe into which a socket and bulb may be placed. (Lighting)

Jib Arm

A mechanical are which is supported on a dolly, tripod, or other device, which is counterweighted to hold a camera for an increased range of motion. (Production)

JPEG

A compressed image file format that can be saved with different levels of compression. The quality of the image will suffer the higher the level of compression used. Some prepress systems will not output JPEG files so it is best to check before using this format.

Juicer

An electrician.

Jump-Cut

An editorial device where the action is noticeably advanced in time, either accidentally or for the purpose of creating an effect on the viewer. (Film Editing)

Junior

A 2K fresnel light unit. It may also mean any 1 1/8 inch spud or mounting pin or any 1 1/8 inch female receiver. (Grip)

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