The ÂTiffen 4 x 4" Skyfire Graduated Filter helps to specifically add a unique orange to yellow gradient 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 2 color density provides less skyfire coloration than the 3 density, but more than the 1 density filter. Simulates or Enhances sunset or sunrise Creates mood or drama Graduates Clear to orange/red Can be combined with other Filters Works with Tiffen PRO100 System