NiSi PRO Nano HUC UV ultra-thin filters adopt a double sided, multi-coating lens technology that employs high quality Japanese ultraviolet absorption optical glass. It assures high transmittance and highly smooth surface that avoids unnecessary reflection. The frame is constructed from Brass using highly accurate brass milling and with thickness of only 3,5mm, which make this ultra thin filter to fit perfect even on super wide angle lenses to avoid vignetting. The NiSi PRO Nano HUC UV has an exclusive creative "U" type Nano coating and a hardened waterproof coating.
The UV filter is also useful as a general protective filter to leave on lenses at all times. Filters help to reduce dust and moisture from reaching your lens element and provide additional protection in case of drops or situations where scratching could occur.