Is the lens image circle that vignettes , or the mount? I am sure my Novoflex lenses will be OK. re image circle.I am cusious too
I suspect it may actually be the copal shutter opening, since the viewer doesnt vignette as badly as the shot
I am going to send the Truewide to Keith to check. I am going to suggest he try to get his hands on the mamyia shutter!
Victor
When a shutter is attached to the back rather than the lens, you need a shutter opening not much bigger than the diagonal of the sensor, and, if you are using movements, the shutter moves with the back so, for shift (or slide) and stitch you can get a big picture with a relatively small shutter.
I have shutter-free aerial lenses with rear elements about 5 inches across, and the Schneider fine art Gold is only f14 if you have it without a shutter.
What size shutter are you using? (what shutter, number, and what opening?).
The Sinar lensboard shutters open much wider than the diagonal of 6 * 4.5 don"t they?