This Nisi MC-CPL ultra-thin filter is equipped with the newest high quality Japanese  Original Polaroid  film and special technique of double sided, multi-coating, which helps increase transmittance while reduce reflectivity. The edge of lens is all painted with Japanese polishing paint for anti-reflection, which weakens greatly the impact of spots and ill-defined rays on imaging, and removes unwanted reflections from non-metallic surfaces.High quality lens assure CPL filters' smooth surface. Meanwhile, Ultra-thin frame while using a high-quality aluminum frame, 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.