Bests & Worsts Reviews from Amazon

I now own two of these filters (77mm and 67mm), and one non XS-Pro that has no nano coating B+W 77mm Clear UV Haze with Multi-Resistant Coating (010M). I would recommend going for this one. After comparing the two types of B+W UV filters I decided to bite the bullet and pay the substantial premium and wanted my third filter to be XS-Pro. Bottomline: Despite higher cost, I would recommend buying this XS-Pro filter because: 1. It's slightly thinner (so it does not cause vignetting even with my 28mm lens) 2. It's nano coating is useful... it is very easy to clean 3. It allows filter to be on it unlike some ultra thin filters How I tested it? Sorry to be crude but I put finger prints all over the filter, and some saliva to simulate real time dirt/oily fingers and water. Cleaning the filter with tissue paper or cotton cloth (instead of lens cloth). It took me about 10 seconds to wipe clean the XS-Pro, and took me almost a minute to clean the Non-XS-Pro and still have some murkiness on it. When out in the field, I think this is important.