This Blue Multi-Coated UV Filter from K&F Concept fits lenses with a 40.5mm filter thread, providing ultraviolet filtration to reduce haze, with the added benefit of protecting the lens from dust, debris, fingerprints, and impact. Made of Japanese optical glass, this filter also features multi-coating to reduce potential internal flare and glare. The slim profile design of this filter allows it to be used on wide-angle lenses without vignetting.