Pantograph (lighting suspension)

A pantograph is a commonly used overhead suspension system for lamps and audio and video monitors in television studios. It is also used on a smaller scale in many photography studios. Using either motor driven cables or a spring system, the pantograph can be balanced so that a light touch can readjust the height of the load (usually a lamp). The system usually works through a series of connected diagonals that can be compressed or extended to adjust the height of the rig.

A pantograph with a Studio Light
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