Interestingly, WRT Mamiya RB/RZ, the film is much flatter when using 220 than when using 120. The paper backing has an affect on flatness. This would probably be the same for any that roll the film back across the rollers instead of directly onto/off of the spools.
Collin -----------------original------------------- Subject: RE: FS: Pentax 645N > Are 6 x 7 cameras similarly afflicted? The Pentax isn't. The Bronica GS is. I can't comment on others. William Robb -- ----------------------- "Get over it." Dr. Laura -- - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .