These are the best filters around. I purchased two of the 52mm with MRC from Amazon. Firstly, the outer boxes came slightly squashed as they were packed in a cardboard envelope by Amazon, oh well. I did notice that one of the filters had slight black paint missing on the brass rim, no big deal. The quality of the glass is first class and is a real luxury for any lens. The clarity is amazing, ultra clear and free from glare or any reflection whatsoever. My experience with Hoya HMC filters has been the opposite. The Hoya filters don't have the same quality of glass, and the filter thread is not as solid nor as smooth to fit around lenses. The B+W filters are made in Germany and use the finest glass. I also use Nikon NC filters, and would rate the B+W higher in quality due to the solid brass rim and better quality glass. Also the B+W glass doesn't rattle like my Hoya ones do. Get the MRC version if you want absolute best for your lens. Expensive, but worth it.