Formatt 58mm Skin Tone Enhancer #2 Filter

Glass filters are made with Schott Water White Optical glassColor and effects are digitally applied to a wafer thin mebrane layered between two pieces of ground glass. This process is called A.C.T(Absorption Cell Technology)All Formatt filters are polished to within 2 microns of optical flatnessFormatt filters are 1mm thick and edge framed. All filters come with a individual wave deviation chart to certify quality.All filters come with a 10 year guarantee against fading or color

Source: Digital Camera and Video Store...