Nisi’s UV ultra-thin filters Equipped with Japanese superior glass, with highly smooth on the surface . Meanwhile, the frame is made of high quality aluminum (thickness only 5.2 mm), it’s the thinnest in the world so far. Additionally, superfine dull polishing and elaborate knurling make sure that the frame will not blanch because of repeated rotation; this ultra thin filter frames to help avoid vignetting on super wide angle lenses. All materials used in this filter meet the requirements of European Union’s standards of environment protection—ROHS(Restrictions on Hazardous Substances), No hazardous. Furthermore, screw thread in front of the frame makes it easy to fix the lens cap and other accessories.
