<p>For Dan:<br /> <br />Could the problem be the vacuum effect of opening the bellows? If the bellows are allowed to spring open, and especially if the spring is strong, the film can be sucked into the film gate giving a very soft focus image no matter the aperture. In my experience with almost all folders, opening the front slowly by having a hand on the base avoids this and normally gives very good results edge to edge, even at wide apertures. This problem could be one reason some avoid all folders. One camera that was built to avoid this was the late 30s Weltur that by design was built to open very slowly throughout its opening arc. Others start to open slowly but then after a certain point has been reached pop the rest of the way.</p>