The Tiffen 4 x 4" 3 Yellow Soft Edge Graduated filter allows you to specifically add warm and bright yellow colouration to skies and other bright areas of an image whilst allowing a portion of the image to remain neutral in colour. The filter colouration is densest at the edge and fades towards the centre, with a soft transition between the dense and clear areas. Colour density 3 provides less intense yellow colouration than density 4, but more than density 2 filter.nnThis filter is made 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. It measures 4 x 4" / 101.6 x 101.6 mm.nnnFeatures:nn- Adds bright yellow colouration to specific areas of the image.n- The graduated filter design maintains a portion 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.nnnSpecifications:nn- Type: Yellow Soft Edge Graduated Filtern- Size: 4 x 4" / 101.6 x 101.6 mm (0.2" / 4 mm thick)n- Density: 3n- Effect: Used to give photographs a coloured dramatic effectn- Construction: ColorCore Glass