The Tiffen 4 x 4" Blue 2 Soft-Edge Graduated Filter is a soft-edge graduated colour filter that adds a bluish colour to the image, giving a refreshing effect to your photographs. The graduated filter design maintains a neutral part of the image, which gives a more realistic appearance whilst allowing the sky or other bright areas to take on the density colour. Density 2 offers less blue tint than the density 3 filter, but more than the density 1.nnTiffen filters are manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, and polishing it flat to a tolerance of 1/10,000th of an inch. This filter measures 4 x 4" / 101.6 x 101.6 mm.nnnFeatures:nn- Blue tint gives a refreshing effect to part of the image.n- Soft-edge graduation to a clear area to maintain a neutral part of the image.nnnSpecifications:nn- Type: Blue soft-edge colour graduatedn- Size: 4 x 4" / 101.6 x 101.6 mm (4 mm thick)n- Grade: Density 2n- Effect: Used to give photographs a dramatic coloured effectn- Construction: ColorCore technology