Features: Neutral Density (ND) filters can reduce the intensity of light without appreciably changing its color. ND filters have different stop reduction numbers and transmittance thus generated can be applied for different shooting conditions, such as portraiture, water falls, etc. Apply slow shutter speed under strong sunlight exposure. Simply rotate the ring of this filter, it offers 2 to 8 stops added density. Slim profile design. Thin filters are essential for avoiding vignetting when shooting at wider angles. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Material: aviation aluminum Size: 11x11x2.5cm Diameter:37mm / 43mm / 46mm / 49mm / 52mm / 55mm / 58mm / 62mm / 67mm / 72mm / 77mm / 82mm Thickness:6.9-7.5mm includes: 1x ND Filter