When I still had my 645N just before I got my Z in 2014, that's when 220 began to disappear-and so did the 120 backs! Maybe it's different now. But sometimes the cost is not the factor, but availability. buying 120 backs is a question best answered by the wallet holder.Good catch. So it is incumbent on the modifier to pay attention to the shim attachment means, particularly if many rolls are passed over them and/or they are subjected to temperatures that might affect the bonding agent. The result will achieve "120 film" drag until the shim attachment scheme fails. My opinion: It is feasible to reverse the plastic part to get the count correct, and feasible to shim the 220 pressure plate so that it emulates a 120 pressure plate.
Pentax 645N - 120 film in 220 magazine ? - is the page where the two plates (of different thickness) are shown. MINT CONTAX 645 MFB-1A 120/220 Vacuum Film Insert Holder from JAPAN. buying 120 backs is a question best answered by the wallet holder. MINT Bronica TELE-CONVERTER G 2X for Zenzanon-PG from JAPAN. See also messages 48 and 55 of that thread. Much easier than machining down a plate." "I added tape to the edge of the 220 plate above, so that the machined area at the edge of the plate was now flush with the rest, as in the 120 plate. "My recollection is that the 220 plate was not thicker, but the hard-points that mated with the film gate was machined down about the thickness of the paper, so as people have pointed out, the gap was thinner to accommodate the film without backing paper. (I think I'm using 15 message pages.)įrom message 40 of the referenced thread:
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