The Ultra Clear filter is designed for protecting your lens with high quality glass that can be left on at all times. This High-Trans Titanium Filter has very high transmissive properties utilizing multicoatings & a. Titanium oxide component. These filters are mounted in a light weight metal ring with a matte black anti reflective inner ring & a. Titanium finnish outer ring to identify the titanium oxide componenet in the filter. The new coatings for this filter increases hardness & reduces the suceptibility to smearing.