Tis 85 x 110 Formatt-Hitech Firecrest Soft-Edge Graduated ND Filter helps to darken specific areas of an image, such as bright skies, while allowing for a normal, unaffected exposure in the other regions of the image. The filter is densest at the edge and tapers to clear by the middle, with a soft-edge line of transition between the density and clear areas. Neutral density filters do not affect the coloration of the image and the 1.5 density provides a 5-stop reduction in light from entering the lens.