I'd like to challenge the view that 6x9 folders give soft pictures

RolandRB wrote:
I'd like to challenge the view that 6x9 folders give soft pictures.
I've heard this opinion oft repeated on websites that discuss medium
format. The view is that "the film is not flat" and so gives poor
results. I challenge that. I've just got the results back from a 1931
6x9 Zeiss Ikonta and there is no evidence of lack of film flatness
leading to poor focus. Because the camera is old, I tightened the
springs on the pressure plate before taking any photos and I always
wind on just before taking the shot, because it is only natural for
the film to warp over the plate in the heat over time, so I avoid
that. If I delay taking a photo after winding on - maybe waiting for
better light or sky - then I start to wind on to tighten the film and
then I get no problem.

If it were just the 'wind on' need, that would be of little concern.

From the various replies to my enquiry some time ago, I think there is
also the issue of RF focus errors to take into account. This is what
scared me off buying a used one a few months ago.