When I talked with Kodak about 4 months ago, I asked the rep what to capabilities of their b/w film was, he told me that all b/w films made by kodak were capable of a 7 stop range, I use techpan once in while when I shoot 35mm, and I rate it at 100 and develope in Kodak SD-1 pyro, it give a beautiful tonal range and is tack sharp. Pat(posted 8836 days ago)