The Formatt-Hitech 5.65 x 5.65" 1.2 soft edge graduated neutral density glass filter helps to 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 transition line between the dense area and the clear area. By having only a portion of neutral density on the filter, you can selectively darken areas of an image whilst allowing the part of the image in the clear section to receive the normal amount of exposure. Neutral density filters do not affect the colouration of the image and the 1.2 density provides a 4-stop reduction of light entering the lens. Formatt-Hitech glass filters are made from high-quality Schott Superwite glass for exceptional clarity and maintained light transmission. This filter measures 5.65 x 5.65" / 143.5 x 143.5 mm. - 1.2 soft edge graduated ND filter to darken skies and other bright areas of the image. - Provides a 4-stop reduction of light in selective areas. - The soft transition is ideal for circumstances where there is no distinct separation line between the light and dark areas of the image. - Neutral density filters do not affect the overall colouration of the image.