I recently purchased a used Nikon 14mm which I love. I was wondering how to specify the type of filter I need when ordering filters. They must be pretty thin to go in that little slot in the back? I was thinking of getting a red 25A for b&w.

Also, I was using it with Velvia 50 and got a sky that no polorizer could ever get. Wow! Is that something to do with the lens makeup or what? Incredible blue sky! almost *too* dark!

Dorothy - (love my F3)