The Tiffen 107mm Coarse Combination 85/ND 0.6 Filter is a combination of both an amber color conversion 85 and a 0.6 neutral density filter. There is a 0.6 density for darkening of the entire image in order to photograph with a wider aperture or slower shutter speed than normally required. The 85 filtration covers the entire filter plane and converts the color temperature to 3400K for use with type A (tungsten) films.
The 0.6 ND filter provides a reduction of 2 stops. This filter is constructed from Water White glass and is made using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass, grinding flat to a tolerance of 10,000th of an inch, and then mounting to precision metal rings. This filter has a diameter of 107mm with coarse threads.
