I spent the day processing film from my trip northwest and back. Since I had some Bergger BPF 200 left over from awhile back I thought that I would use it up. If this isn't the worlds worst film it has to be a close second. This stuff will not build density. I shot it at 100 and processed in Pyrocat 2-2-100 (these are 4X5 negatives for enlarging) and I still can not build any density range with it. God if I had anymore left over I would pay someone to take it off my hands. Never, and I mean never again!!!!