Hey all, I went to Camera World (a camera store in Charlotte) to pick up some paper and other odds and ends. When I was there, I saw they had a wheel barrow filled with old filters. I only got one (the only one I saw that was 52mm). It is an 85 filter, and it is an orange color. There is no manual, and I can't seem to find anything about it online other than something about adjusting color temperature. What exactly does it do? I shoot B&W Film. Would this filter be of an use to me on B&W Film, or on a digital SLR? Thanks!