The Tiffen 4″x5.650″ 85ND Combo Filters 0.3-1.2, is a popular combination of the 85 and Neutral Density filters from Tiffen.Combination of both an amber color conversion 85 and a neutral density filter.Neutral Density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.85 filter converts the color temperature to 3400K, allowing you to use type A tungsten-balanced film in daylight situations. CAT 4565085N3, 4565085N6, 4565085N9, 4565085N12 FilterConversionExposure increase855,500 to 3,400 K2/3 stop85B5,500 to 3,200 K2/3 stop85C5,500 to 3,800 K2/3 stop