The Tiffen 5.65 x 5.65" 0.3 Soft-Edge Graduated Neutral Density Filter is a graduated neutral density filter that helps specifically darken skies and other bright areas of the image. The filter is densest at the edge and fades to transparent in the middle, with a soft-edge transition line between the dense and transparent areas. Neutral density filters do not affect image colouration and the 0.3 density provides a 1-stop reduction of light entering the lens.nnThis filter is manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding it flat to a tolerance of 1/10,000th of an inch. This filter measures 5.65 x 5.65" / 143.5 x 143.5 mm.nnn- 0.3 soft-edge graduated ND filter for darkening skies and other bright areas of the image.n- Provides a 1-stop reduction of light in selected areas.n- Neutral density filters do not affect overall image colouration.nnnSpecificationsnn