Tuesday, March 25, 2008

COLOUR-CORRECTION FILTER

Definition: Filters used with Black-and-white film to correct for the difference in films sensitivity to colour as compared with that of the human eye. Without a filter, for example clouds would be all but invisible against a light blue sky; a yellow filter would darken the sky, thus creating contrast between the sky and the clouds. Colour Name Effect Cyan Absorbs Red Yellow Absorbs Blue Magenta Absorbs Green Red Absorbs Blue and Green Green Absorbs Red and Blue Blue Absorbs Red and Green

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