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conversion factor

A filter that gives allows daylight film to record color faithfully in artificial light or, conversely, for tungsten-balanced film in daylight. For example, orange conversion filters are used when exposing tungsten-balanced films in daylight, bluish filters for daylight-balanced films in tungsten light. Most useful with slide films, as color negative imbalances can usually be corrected when prints are made.

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conversion factor

Used to describe changes in apparent magnification when a 35mm lens is used on a D-SLR with a sensor smaller than 24mm x 36mm.
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