The VU Sion UV Filter is designed to be a part of your lens from the moment they're screwed into place. Equipped with VU patented iO Lock, which environmentally seals and protects the front element of your lens, VU UV filters also feature hardened glass, an optimized UV rejection coating, VU unique White Balanced Multi-Coating and a special Flat Wave Overcoat to ensure that your images are captured exactly the way you envision them.
