Fill light is a source of illumination that lightens shadows. See Fill-in . Film is a photographic material consisting of a thin transparent plastic base coated with a light sensitive emulsion. Each brand of film exhibits a different characteristic curve. Film clips are metal or plastic clips used to prevent the curling of a length of drying film.
Film holder is a light tight container to hold sheet film.
Film pack is a container holding several sheets of film, so devised that when fitted to the camera the photographer can pull a tab to remove an exposed sheet and replace it with another. Film packs are typical with Polaroid film. Film plane is the plane at the back of the camera across which the film lies. Film speed see Speed . Filter factor is a number by which an unfiltered exposure reading must be multiplied to give the same effective exposure through the filter.