The Tiffen 2 x 3" 1 Straw Hard-Edge Graduated Filter helps to specifically add a warm, golden yellow 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 hard-edged transition between the density and clear areas. The 1 color density provides less straw coloration than the 2 density filter.