I was looking at a film on 16mm that is a dupe. Obviously the quality will be somewhat lower, but what can I expect? Is the difference allways very noticable? The sound was somewhat "bassy" because it was a dupe according to the seller. Are all dupes with the same amount of quality loss? I have one dupe of road runner where the quality is very noticable when I just looked at one that isn't a dupe. The film I look at now is an old Hitchock where I guess the picture was not razor sharp in the first place.