High-performance B+W ND filter reducing light transmission by six f-stops Transforms 1/60 s exposure time into a full second without altering aperture or DOF Crafted from finely ground and polished special glass for optimal optical quality Features advanced thin-film technology with a multi-layer anti-reflective coating Protective outer layer with dirt- and water-repellent properties for easy maintenance Ensures uniform light attenuation for color-neutral image results