1、Double Sided Coating: 24 layer nanometre waterproof coating on both sides, which can reduce the reflection on the surfaces of the filter, high definition picture quality, protecting the lens from water and scratches. 2、Stepless Light Reduction: One lens with multiple gears, and with a rotating lever, it is more convenient to use and operate, and the filter adopts a large diameter design, which increases the amount of light entering and is not afraid of the appearance of vignetting. 3、Reduce Incoming Light: ND filter is mainly to prolong the exposure time and reduce the amount of light entering the camera. Using the filter, you can make the image clearer and make your work more professional. 4、AGC Optical Glass: AGC optical glass materials are used for accuracy grinding and polishing to achieve good parallelism, uniform optical particles, fine optical adjustment, and the picture has a texture to ensure image quality. 5、Aluminum Alloy Frame: 6061 aluminum frame is adopted, which has excellent corrosion resistance, durable and has a long service life. Item Type: ND Lens Filter Material: Aluminum Alloy, Optical Glass Gross Weight: 139g / 4.9oz Coating Layer: 24 layers on both sides Product Specifications: 1.5 to 8 gears (ND2 to ND256) Diameter: 67mm / 2.6in 1 x Filter 1 x Storage Box