Common imaging train

Askar 80PHQ + 0.76× reducer + ASI2600MM Pro + EFW 7×36 + OAG-L

Askar's 0.76× reducer for the 80PHQ takes the standard 55 mm behind its M48×0.75 output. The mono train ZWO designed the pieces around: the camera keeps its tilt plate, the 7×36 wheel bolts to it, and the OAG-L bolts to the wheel with its M48 plate facing the telescope. The unmounted 36 mm filter glass still shifts focus slightly, and the 36 mm bore is the thing to watch on anything larger than APS-C. At f/5.7 the 36 mm bore still clears the APS-C cone; the filter shift is the only tenth to mind.