The KENKO KCM-3100 color meter. is a color temperature meter that reads the temperature of either ambient or flash light. Knowing the color temperature of a light source is extremely important for consistently faithful color accuracy and reproduction in photography. Reproducing accurate color is critical in many areas of photography such as fashion and commercial product. Useful for both still and cine photography. The KCM-3100s uncluttered control button layout and large easy-to-read LCD make using the meter much easier than other options on the market today. The KCM-3100 has 3 display modes for diplaying color temperature. Each mode is designed for a certain type of photography or filtering system. LB(Light Balancing): LB-index is used to select the necessary amber or blue LB-filter. The Mired difference between the specific photographic color temperature for the selected film type and the light source. CC (Color-Correction): CC displays the Kodak filter number(s) of the necessary light-balancing filter(s) to make for easy selection of the required light balancing filter. Where as the LB system uses Amber or blue filters, the CC system uses Magenta or Green color compensating filters. Photographic color temperature in degrees Kelvin: This is a useful setting to determine filtration based on the light source and the spectral sensitivity of the film used. The ability to take ambient and flash light readings u