The Tiffen 4 x 5.65" 1 Straw Soft Edge Graduated Filter helps to specifically add a golden-yellow and warm colouration to skies and other bright areas of an image whilst allowing part of the image to retain a neutral colour. The colouration of the filter is densest at the edge and fades to clear in the middle, with a soft-edge transition between the dense and clear areas. Colour density 1 provides less straw colouration than the density 2 filter. This filter is manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding it flat to a tolerance of 1/10,000th of an inch. It measures 4 x 5.65" / 101.6 x 143.5 mm. The transition line of a horizontally oriented filter is parallel to the long side of the filter. Provides a golden-yellow and warm colouration to selected areas of the image. The graduated filter design maintains part of the image neutral, giving a more realistic appearance whilst allowing the sky or other bright areas to take on the colour of the density.