Tiffen 5285B 52mm 85B Filter Product FeaturesSize: 52mm An 85 decreases the color temperature from 5500-3400 degrees Kelvin An 85A decreases the color temperature from 5500-3100 degrees Kelvin An 85B decreases the color temperature from 5500-3200 degrees Kelvin An 85C decreases the color temperature from 5500-3800 degrees Kelvin Product DescriptionSize: 52mmUsing tungsten film in daylight will Produce a bluish cast. The 85 Series will Produce natural colors when shooting with tungsten film outdoors. Sunlight, daylight, incandescent, fluorescent, and other artificial light sources all have color characteristics that vary s...