Common imaging train

ZWO FF107 + 0.7× reducer + ASI6200MM Pro + EFW 7×2" + OAG-L

ZWO's 0.7× full-frame reducer for the FF107/FF130 takes the standard 55 mm behind its M48 output. Full-frame mono: ZWO only recommends 2" wheels for the 43 mm diagonal, the camera wears its M54 tilt plate, and the wheel and OAG-L bolt on with screws rather than threads. Every bore in this train has to clear the diagonal. The reducer's M48 output meets the OAG-L's M48 plate directly; the 2" filter cell is the bore to watch at f/4.9.