Common imaging train

Celestron EdgeHD 8 (native) + ASI533MC Pro

At native f/10 the EdgeHD 8 measures its back focus from the baffle-tube lock nut, and Celestron's own T-adapter is sized so that a 55 mm T-ring lands exactly on it. Native EdgeHD imaging: Celestron's T-adapter plus the camera, and the extenders in the ZWO box close the rest. No reducer, so the f/10 cone is forgiving of bore sizes. Celestron's T-adapter plus the two extenders in the ZWO box land exactly on the native figure.