Common imaging train

Askar 107PHQ + 0.7× reducer + ASI6200MM Pro + EFW 7×2" + OAG-L

The universal 0.7× reducer for the 107/130/151PHQ asks for the standard 55 mm behind its M48 thread. 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. Askar does not print the reducer's image circle, so the tool checks only what it knows: bores against the 43 mm diagonal.