High-quality 49mm Master 806M ND 1.8 6-Stop MRC Nano Neutral Density Filter for optimal photography Reduces light entering the camera by six f-stops, allowing for extended exposure times Finely ground and polished special glass construction ensures superior optical quality Advanced thin-film technology with multi-layer anti-reflective component to prevent unwanted reflections Protective outer layer repels dirt and water, simplifying filter cleaning and maintenance Ensures uniform light attenuation for optimally color-neutral image results