Excerpt: B+W has a leader in filters. Extremely high quality, no distortion, glass that introduces no negative influence on the light or your images. A highly recommended product you will not be disappointed.
Excerpt: I exchanged this filter for the tiffen filter I ordered for my 400 mm 5.6 canon. The tiffen was good but still affected the quality of my 400 mm images. it worked fine on the wide angle 17-40. The BNW was a no brainer. No noticeable deterioration of the image even on the 400 prime!
Excerpt: This is my first filter and I'm glad that I got the B+W instead of buying the cheaper Tiffen or Hoya. It's defintely worth the price, quality is amazing and can't wait to keep using it. Best results from landscape photography.