The Formatt Series 9 85B/ND 0.9 Hard Graduated Combo Filter is a combination of both a warming 85B and a 0.9 graduated neutral density filter. There is a hard-edged, 0.9 density for darkening skies and other bright areas of the image. The 85B filtration covers the entire filter plane and converts daylight (approximately 5500K) to 3200K in order to use tungsten-balanced film outdoors.

The 0.9 density provides a 3 stop reduction in light from entering the lens. The filter is compatible with Series 9 holders and is constructed from specially formulated CR-39 resin sandwiched between two layers of high-quality Schott glass.