This 4 x 4" Combination 85B Amber & ND Filter combines an 85B with a 1-stop neutral density filter. Using tungsten film in daylight will produce a bluish cast in the photograph. The 85 series will produce natural colors when shooting with tungsten film outdoors. A #85 filter will decrease the color temperature from 5500K to 3400K and produce slightly cooler results than an 85B.
Lee resin filters are made from lightweight, optical polymeric materials.