Choosing Filters for B&W Photos
Found this article at Kenrockwell.com
"As Ansel Adams points out in his books, unless you are photographing very brightly colored things like fruit or flowers, there is not much difference in the effect from one filter to another. Yes, he used over a dozen different ones for b/w, but no, there wasn't that much difference from one to another. There is a huge difference between using even a mild yellow filter and using no filter at all because all the filters (except blue which I never use) remove all the ultraviolet light to which b/w film is very sensitive and which is invisible to our eyes."
