Common imaging train

Askar SQA106 + ASI2600MM Pro + EFW 7×36 + OAG-L

The SQA106 is the largest of the SQA Petzvals, with a 55 mm image circle that covers full frame with margin. 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. A 55 mm image circle on a 28 mm diagonal: the only limit left is the 36 mm filter bore, and it is not one here.