Using tungsten film in daylight will produce a bluish cast in the photograph. The 85B 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. This filter combines an 85B conversion filter with a Neutral Density .6 (two stops) filter. The Lee polyester filter size is 4x4".