Friday, March 14, 2008

RECIPROCITY

Definition: Most films are designed to be exposed within a certain range of exposure timesusually between 1/15 second to 1/1000 second. When exposure times fall outside of this range-becoming either significantly longer or shorter-a film's characteristics may change. Loss of effective film speed, contrast changes, and (with color films) color shifts are the three common results. These changes are called reciprocity effect.


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