It can effectively balance the exposure of the sky and the ground during shooting, prevent overexposure, and enhance the picture quality.The lens adopts optical glass, high-definition grinding treatment, and adopts double-sided multi-layer nano-coating process to give the lens high-quality waterproof, oil-proof, anti-fouling and scratch-proof performance.Mirror frame is made of high-quality aviation aluminum with a knurled pattern design, which makes disassembly and assembly faster, and matches the threaded frame of the original camera, replacing the original lens to ensure the camera& 39;s bare-metal waterproof performance.The lens can be rotated to adjust the best angle and the inner side of the frame is equipped with flexible silicone material to ensure that the original lens is not damaged during the installation process.Item Name: Filter Gradient SetMaterial: Aluminum, Optical GlassFeatures: Easy to Install, Durable, Camera AccessoriesSize: 38.2mm x 38.2mm x 8.5mm/1.50" x 1.50" x 0.33" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Filter Gradient Set (ND8-GR ND16-4 ND32-8) (Professional)1 x Filter Cloth1 x User Manual