Features:1. Neutral density can be adjusted from ND2 to ND400.2. Function: Reduces the amount of light reaching the film without affecting the color. 3. Large aperture is available to create depth of field easily.4. Apply slow shutter speed under strong sunlight exposure.5. Suitable for dynamic screen, waterfalls, streams, etc. photography.Notice:1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow slight deviation due to manual measurement.2. This ND filter cannot be used at the wide angle end.Specification:Type: adjustable camera ND filterGlass Material: optical glassCaliber: 37mm-82mm optionalColor: BlackFrame material: aluminum alloyCan expand: expandableExtension ring thickness: 1.32mmSpring type: screw-in compression springThickness: 6.9-7.5mmApplication: suitable for using large aperture or low-speed shutter during the day to create special effectsFunction: Reduces the amount of light reaching the film without affecting the color. AdjustableNeutral Density Grade: 2 - 400ND-2: It can reduce the aperture of level 1 and the light volume by 50;ND-4: It can reduce the 2nd-level aperture and the light volume by 75;ND-8: It can reduce the 3-level aperture and 87.5 of the light volume;ND-400: It can reduce the amount of light in 9-step aperture, suitable for long exposure in the daytime and shooting the sun. Package List:1 x camera ND filter