Common imaging train

Celestron EdgeHD 9.25 + 0.7× reducer + T-adapter + EFW 7×36 + ASI2600MM Pro

The 0.7× reducer for the EdgeHD 9.25 keeps the same back focus as the native tube, measured from the reducer's rear surface, with a 42 mm image circle. The large EdgeHD T-adapter already uses up most of the reducer's back focus, so a 7×36 wheel on the T2 thread is about all that fits; the OAG has to go elsewhere (or guide with a separate scope). The large T-adapter is long; the wheel on its T2 thread plus the camera leaves a gap for ZWO's M42 extenders.