The Tiffen Filter Wheel 3 Graduated 0.9 ND Filter is a graduated neutral density filter that helps to specifically darken skies and other bright areas of the image. The filter is densest at the edge and tapers to clear by the middle, with a feathered line between the density and clear areas. Neutral density filters do not affect the coloration of the image and the 0.9 density provides a 3 stop reduction in light from entering the lens.
Tiffen filters are made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding flat to a tolerance of 1/10,000th of an inch.
0.9 ND graduated filter for darkening skies and other bright areas of the image.
Feathered edge is neither soft nor hard, providing a natural-appearing taper between the density and clear areas of the filter.
Neutral density filters do not affect the overall coloration of the image.