Film plane

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A film plane is the area inside any camera where the individual frame of film or digital sensor is positioned during exposure, and the focussed image is received upon the light-sensitive material. It is sometimes marked on camera body with the 'Φ' symbol where the vertical bar represents the exact location.

Movie cameras often also have small focus hooks where the focus puller can attach one side of a tape measure to quickly gauge the distance to objects that he intends to bring into focus.

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