I use almost exclusively the filter of B + W. Have initially also filter Hoya and Hama tested, but neither holds with the B + W quality and Verbarbeitung with. Thanks to the MRC coating the filter can always quickly and easily cleaned. The Passgeauigkeit is always great and the filter can sichohne tilting screws on the lenses. I recommend to anyone who wants to protect his lenses, B + W warmly recommend. Priced they are not cheap but worth it in my opinion, in any case.