The Tiffen 4 x 4" 2 Straw Soft Edge Graduated filter helps to specifically add a warm golden yellow colouration to skies and other bright areas of an image whilst allowing part of the image to remain neutral. The filter colouration is densest at the edge and fades to transparent in the middle, with a smooth transition between the density and transparency zones. Colour density 2 provides less straw colouration than density 3, but more than density 1 filter. This filter is made 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 4" / 101.6 x 101.6 mm. Features: - Adds golden yellow colouration to specific areas of the image. - The graduated filter design keeps part of the image neutral, giving a more realistic appearance whilst allowing the sky or other bright areas to take on the density colour. Specifications: - Type: Straw colour graduated filter with soft edge - Size: 4 x 4" / 101.6 x 101.6 mm (0.2" / 4 mm thick) - Density: 2 - Effect: Used to give photographs a spectacular coloured effect - Construction: ColorCore glass