The filter I have well asked me in advance. Cheap filters came to me out of the question, because I wanted its quality is maintained as possible. Alternatively me a UN-filter from Hama Professional Series is recommended for photo-Koch, which would supposedly reduced from over 100 to 50. Since Hama various manufacturers come into consideration, but I was not really convinced of the product. Besides XS-Pro series, there was also an F-series of B + W, but this cost incl. Shipping costs slightly less. The filter is very well made, can be attributed to good and unscrew and has a nanocoating. Overall a top quality B + W. In the pictures I see no difference, of course, not tested under laboratory conditions, but suitable for daily use 100%. The price was 43, - EUR.
