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 filter Glass Material: optical glass Caliber: 37mm-82mm optional Color: Black Frame material: aluminum alloy Can expand: expandable Extension ring thickness: 1.32mm Spring type: screw-in compression spring Thickness: 6.9-7.5mm Application: suitable for using large aperture or low-speed shutter during the day to create special effects Function: Reduces the amount of light reaching the fi