I just bought an F5 and 35-70/f2.8 and 80-200/f2.8. I need warming and polarizers for these lenses. I have always used B&W filters. I wonder how Nikon filters compare. I gather they have one the equivalent of 81A but no 81B. How about comparative quality? And how about UV filters. Are they useful on Nikon glass. On Leica lenses they are not necessary optically although some people might use them for protection. Comment appreciated. Bob
