Hardened, super‑waterproof nanocoated filter designed to deliver clearer, more consistent images in wet or challenging conditions. Key benefits Clearer images: multilayer coating with transparency and uniformity reduces flare and uneven transmission for sharper, more naturallooking photos and video. Durable, weatherresistant finish: hardened super waterproof nano coating repels water and resists surface wear so the filter continues to perform outdoors and in humid environments. Wide field of view: 112° angle captures more of the scene for landscapes, architecture, and group shots. Close focusing capability: minimum focusing distance of 30–40 cm lets you get nearer to subjects for tighter compositions without losing sharpness. What it does for you Improves image quality by minimizing reflections and preserving contrast across the frame. Protects optical surfaces from moisture and light abrasion while maintaining light transmission. Expands shooting options with both wideangle coverage (112°) and usable closefocus range (30–40 cm). Specifications (as provided) Coating: hardened super waterproof nano coating; multilayer coating filter; transparency and uniformity Minimum focusing distance: 30–40 cm Maximum diameter: 17X23.1 Angle: 112 degrees Compatibility and size Use with lenses or mounts that accommodate a maximum diameter of 17X23.1 (per the product specification). The multilayer nano coating is applied to the optical surface; confirm physical size and mounting dimensions before pairing with camera bodies or accessories. Practical use scenarios Outdoor travel and landscape photography: wide 112° coverage captures panoramic scenes while the waterproof coating protects the optical surface from rain, mist, and sea spray. Action and event shooting in mixed weather: durable coating and transparency keep images reliable when conditions change quickly. Closeup environmental shots and product photos: the 30–40 cm minimum focus distance allows for detailed foreground subjects while maintaining a wide contextual background. Materials and performance notes The filter uses a hardened nano coating combined with multiple coating layers to balance durability, water repellency, and light transmission. Designed to preserve image clarity and uniformity rather than alter color or introduce artificial effects. Use this filter when you need a wideangle optical accessory that resists moisture, maintains transparency, and supports closetomedium focusing distances without compromising image uniformity.