The B&W #007 Protection Clear MRC (Multi-Coated) Glass Filter is more than just a protection filter. This unique filter is specifically designed with a hydrophobic coating to wick water off the filter surface. The elimination of water drops means easier maintenance (cleaning) and maximum reflection reduction. This in turn means sharper, clearer images.
The real function of this filter is to reduce the amount of dirt, grease and splashes away from the lens. In that sense, this filter should be considered a necessity for every lens.
Note! Also available in slim and super wide angle style