For Insta360 GO 3 Camera Lens Filter 1. Optical glass, precision grinding and polishing, high-definition imaging; 2. Double-sided multi-layer nano-coating technology is used to restore the true color; 3. Double-sided oleophobic and waterproof, escorting your lens; 4. The original lens will not be damaged during installation, and the filter can be replaced at any time to prevent you from missing the wonderful moments. Features of different filters: 1. CPL Filters: Increases color saturation, creating deep, rich scenic images. Helps to reduce the amount of light entering the lens. 2. ND Filter: You can get more freedom to control aperture and shutter, bring more exposure methods and creative space for photography creation, and effectively prevent overexposure. The number behind ND represents the ability of the ND mirror to block light. (Not all model type and styles include the above features, you can choose filter styles according to different effects)