This B+W clear protective filter will retain perfect image quality and crispness. This filter has a 99.8% light transmission rating, is made with high quality German Schott glass and mounted in brass. This filter will protect your lens from front element damage. Without a protective filter the damage could result in having to replace your expensive lens - wouldn't you rather replace a filter instead of a lens?
The nano coating is an outer layer of protection that comes standard with all XS-Pro Digital nano MRC filters. The nanotechnology based characteristic (lotus effect) produces a better beading effect with water, making the cleaning of this filter even simpler and faster than ever before. The MRC nano coating has an improved outer (8th) layer over regular MRC coatings.
This filter uses the B+W XS-Pro Digital mount which is especially suited for DSLRs with wide angle and zoom lenses. The XS-Pro Clear Protective filter mount measures only 3.5mm in thickness and still has front threads for additional accessories such as lens caps or hoods. Industry leading B+W uses only the highest quality German Schott glass for outstanding results every time. All XS-Pro Digital mounts are made of brass and are matte black to prevent reflections.