Quote Originally Posted by theo120mm View Post
Recently purchased 2X 120/220 Roll Film backs model 2 from a Mamiya Press.
Apart from being bulky, I think they will work really nice on my RB, not that I have any problems with my current Pro-S backs, but I kind of fancy the idea of a straight forward film loading at the field (If needed), instead of loading the RB back, which sometimes can get tricky.
They have the P adapter and the M adapter, as I haven't received them yet I would like to ask if I need anything else to put them on my RB, or I just remove the revolving adapter and they fit straight on ?
On the Mamiya RB System chart it shows this sequence --> RB Body -> P Adapter -> M Adapter -> Mamiya Press Roll film back.
Also I have heard that they handle film flatness better than the RB backs is that true?
Anyone has any experience using this back? Any tips?

Thanks in advance.
I'm not sure how convenient these backs will be - you lose the revolving adapter and the safety interlocks. Improved film flatness is sometimes rumoured - but I don't think I've seen any proof.