High-quality B+W 67mm Master 806M ND 1.8 6-Stop MRC Nano Neutral Density Filter for enhanced photographic control Reduces light entering the camera lens by six f-stops, enabling longer exposure times without altering aperture or depth of field Constructed from finely ground and polished special glass for optimal optical quality Advanced thin-film technology with a multi-layer anti-reflective component, preventing unwanted reflections Outer layer with dirt- and water-repellent properties for all-around filter protection and easy maintenance Delivers uniform light attenuation and color-neutral image results for professional-grade photography