The HOYA HD Mk II IRND filters are HOYA's new premium ND filters covering the most popular densities ND8, ND64 and ND1000. Featuring HOYA's industry-leading ACCU-ND technology, the filters provide uniform light reduction across the visible spectrum and prevent negative color casts from IR contamination during long exposure photography. The ultra-thin frame reduces the risk of vignetting, and the water-repellent coating makes cleaning quick and easy. Especially recommended for advanced and professional photographers who frequently use ND filters and have high demands on image quality.