Common imaging train

ASI6200MM Pro + EFW 7×2" + OAG-L (full frame)

The SQA106 is the largest of the SQA Petzvals, with a 55 mm image circle that covers full frame with margin. 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. Use the vignetting notes to see why an M42 part anywhere in this train is a mistake.