Converts 5500°K daylight to 4900°K. Used when a very slight warming correction is desired. Deep-dyed base. (Mired shift = +20, Trans.= 92%, -0.1s).Sun 85 & Neutral Density Filters are usually applied to windows for color correction and/or light intensity reduction. RoscoSun 85 is an amber filter that lowers the color temperature of daylight to balance with 3200°K sources. Rosco Neutral Density Filters reduce the level of exterior light and bring it within the exposure range of interior light levels. Two additional RoscoSun materials combine Sun 85 conversion with Neutral Density reduction. All materials are deep-dyed for optical clarity. Except as noted, all materials are extra wide 57" x 21 (145 cm x 6.7 m), sheets 20" x 24" (50 cm x 61 cm).