The Singh-Ray 150 x 150mm 3 Sunset Soft-Edge Graduated Warming Filter helps to specifically add a warm, reddish-orange coloration to skies and other bright areas of an image while allowing a portion of the image to remain neutrally colored. The filter's coloring is densest at the edge and tapers to clear by the middle, with a soft-edged transition between the density and clear areas. The 3 stop color density provides a noticeable amount of sunset coloring that is less than the 4 stop, but more than the 2 stop, sunset warming filter.
Singh-Ray rectangular filters are constructed from CR-39 optical resin for high image clarity and overall durability. This filter measures 5.9 x 5.9" / 150 x 150mm.