The B+W Series 7 KB6 80D Cooling Color Conversion Glass Filter is used for neutralizing the strong red at sunrise and sunset.This glass filter is useful for under-corrected filtering of artificial light photographs on color negative filmsIn situations where you need more yellow, the B+W Series 7 KB6 80D Cooling Color Conversion Glass Filter is the ideal choiceThis conversion filter does not increase the temperature to daylight as much as the 80A, B, or C filtersIt helps you to bring the correct color tone to your imagesThis color conversion glass filter increases the color temperature from 4100 to 5500 Kelvin