Key benefits Clearer images: multilayer optical coating with transparency and uniformity reduces stray reflections and preserves detail for sharper results. Durable protection: hardened, superwaterproof nano coating resists moisture and surface wear, extending product life in outdoor or humid conditions. Reliable performance at close range and wide angle: supports nearsubject work while delivering a broad 112degree field of view. Main specifications (unchanged) Coating: Hardened super waterproof nano coating; multilayer coating filter for transparency and uniformity. Minimum focusing distance: 30–40 cm. Maximum diameter: 17X23.1. Angle: 112 degrees. What this solves for you Reduces image degradation from water, fingerprints, and light scatter, so you get consistent, usable images in more conditions. Allows shooting closer to your subject (30–40 cm) without sacrificing wide coverage, useful for both detail and environment context. Fits devices or housings that accept a maximum diameter of 17X23.1, ensuring straightforward physical compatibility when that size is required. Practical details Function: Optical filter/coating system designed to improve image quality and protect the optical surface. Material: Hardened nanocoating with multiple optical layers for durability and light transmission. Performance: transparency and uniformity for minimal color shift and even image rendering across the field. Typical use scenarios 1. Outdoor photography and videography: Use in wet or humid environments (rain, coastal spray) where the waterproof nano coating protects the optical surface and maintains image clarity. 2. Wideangle group or landscape shots: 112degree angle captures broad scenes while maintaining uniform image quality across the frame. 3. Closerange subject work: Shoot subjects at 30–40 cm for tabletop, product detail, or environmental closeups without losing field context. Compatibility and installation tips Confirm the receiving mount or housing accepts a maximum diameter of 17X23.1 before or installation. Clean using a soft, nonabrasive cloth to preserve the hardened nano coating; avoid harsh solvents that could compromise the surface treatment. This product provides a durable, transparency optical coating solution with a wide 112degree angle and close focusing capability (30–40 cm), suitable for applications that require improved image uniformity and protection against moisture.