I just got done doing a focusing test on my Ansco Titan; this camera is a medium format folder with no focus assist other than a focus ring and DOF scale. I set it on Time and loaded it with waxed paper (subs for a ground glass). Then I tested the focus at Infinity, and all the other marked distances. It passed perfectly, which is good to know. I was generally happy with my shots from the camera, but sometimes they were soft, and sometimes razor sharp. I wanted to make sure that it was operator error (bad distance estimation, camera shake, etc...) rather than the focus being off with the camera. I did notice something though. The film take-up spool did a very poor job of holding my waxpaper taught. I'm sure that an actual roll of film would work better, but watching how the camera worked with the back open really got me thinking about film tension. When I advance the film, I stop the advance just before I actually hit the frame number, and then I wait until I'm actually going to take a shot to finish the advance. This is advice on maintaining good film tension I saw out there somewhere. The idea is that carrying the camera around fully advanced would allow the film to loosen and bow away from the focus plane. Now I'm going to try to apply tension on the roll by holding the film take-up knob taught as I shoot. This shouldn't be very difficult as it's right on top on the left side, and can be done with one finger. I'll let you know if I see marked improvement in my sharpness.