Useful as creative warming effect with daylight film in daylight. Designed to produce cooler results with tungsten film in daylight than the 85 or 85B. Exposure increase 2/3 stops. 85C decreases the color temperature from 5500° K to 3800° K.
Excellent for copy stand lighting.
Corrects color balance for standard processing.
Allows photography indoor and outdoor on the same roll of film.