This Firecrest Colby Brown 100mm Signature Edition Premier Landscape Filter Kit from Formatt Hitech contains three filters that can be used individually or in various combinations to improve the results of your landscape photography by preventing overexposure, as well as a circular polarizer to prevent distracting reflections or glare. The included filters consist of an 82mm Firecrest circular polarizer, a 100 x 100mm Firecrest six-stop solid neutral density filter, as well as a 100 x 150mm Firecrest two-stop graduated neutral density filter. Also included is an optical resin, 100 x 150mm two-stop reverse-graduated neutral density filter that can be applied to darken bright skies, specifically during a sunrise or sunset, while allowing for a normal, unaffected exposure in the other regions of the image. The two-stop graduated neutral density filter features a soft-edged line of transition between its dense and clear areas, while the two-stop reverse-graduated neutral density filter achieves its effect with a band across its center region that provides a 2-stop reduction in light from entering a lens. This band extends in both vertical directions before tapering to clear below and lighter above, with a hard-edged line of transition before the clear area. Together, these neutral density filters provide a versatile solution for various lighting conditions and horizon lines.