III N film back with 120 insert for GX680 III, user replacable batteries and exposure data imprinting. Compatible with GX680 and GX680 II. $160, shipping within US included. (SOLD)
6x7 and 6x4.5 masks for III N back. Once installed, the film back would automatically adjust framing to get correct number of exposures per roll. Can only be installed at the beginning of roll, so no mid-roll change of format, unfortunately. $40 each.
Back + two masks: $220
6x7 and 6x4.5 masks for III N back. Once installed, the film back would automatically adjust framing to get correct number of exposures per roll. Can only be installed at the beginning of roll, so no mid-roll change of format, unfortunately. $40 each.
Back + two masks: $220
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