Sunlight, daylight, incandescent, fluorescent, and other artificial light sources all have color characteristics that vary significantly. Filters give you better images by adjusting for these light variations. Film and video are rated for a particular color temperature such as that of daylight or tungsten light. Filters are used to correct differences in color temperatures between the recording medium and a light source.The 80A filter balances daylight film for use with most standard tungsten lighting, studio lighting and copy stand lighting.