Some photographic situations require specific color corrections. For example, when shooting daylight film under fluorescent lighting, some magenta correction is needed in order to remove the greenish tint that would otherwise appear. The amount of color correction required is most accurately measured via a color temperature meter. Color Compensating filters are available in the three primary colors: Red, Green, and Blue; and in the three secondary colors: Cyan, Magenta, and Yellow. A typical designation for one of these filters is CC30M. The "CC" stands for Color Compensating. The "30" stands for a density of 0.30 and the "M" is for magenta.
Hitech resin filters are made from lightweight, optical resin and are 4 x 4" (100 x 100mm) x 1.5mm thick.
Hitech Color Compensating filters are available in the following increasing densities: 0.025(CC025), 0.05(CC05), 0.10(CC10), 0.15(CC15), 0.20(CC20), 0.30(CC30), 0.40(CC40), 0.50(CC50).
Color Compensating Filter Factors
CC025B: 0 stops
CC05B: +1/3 stop
CC10B: +1/3 stop
CC15B: +1/3 stop
CC20B: +2/3 stop
CC30B: +2/3 stops
CC40B: +1 stop
CC50B: +1 1/3 stops
CC025G: 0 stops
CC05G: +1/3 stop
CC10G: +1/3 stop
CC15G: +1/3 stop
CC20G: +1/3 stop
CC30G: +2/3 stop
CC40G: +2/3 stop
CC50G: +1 stop
CC025R: 0 stops
CC05R: +1/3 stop
CC10R: +1/3 stop
CC15R: +1/3 stop
CC20R: +1/3 stop
CC30R: +2/3 stop
CC40R: +2/3 stop
CC50R: +1 stop
CC025M: 0 stops
CC05M: +1/3 stop
CC10M: +1/3 stop
CC15M: +1/3 stop
CC20M: +1/3 stop
CC30M: +2/3 stop
CC40M: +2/3 stop
CC50M: +2/3 stop
CC025Y: 0 stops
CC05Y: 0 stops
CC10Y: +1/3 stop
CC15Y: +1/3 stop
CC20Y: +1/3 stop
CC30Y: +1/3 stop
CC40Y: +1/3 stop
CC50Y: +2/3 stop
CC025C: 0 stops
CC05C: +1/3 stop
CC10C: +1/3 stop
CC15C: +1/3 stop
CC20C: +1/3 stop
CC30C: +2/3 stop
CC40C: +2/3 stop
CC50C: +1 stop