[The_bluester (Paul)]

Lol. You are not making this any easier! Another obvious advantage is the ability to put an OAG in the train which the RASA lacks to be able to take much longer exposures without worrying about flexure. I imagine a sub F3 newt would be tricky to collimate well, though the RASA would be the same even it if does only have one adjustable component to do.

On that note and with the proliferation of tricky cameras I have been wondering why they don’t implement a “multi ROI” firmware where you can have more than one region of interest on the chip but read them off at different exposure times. Done like that you could use a chip slightly larger than your well corrected image circle and then define a little patch at the edge to be a live, online guider, reported in software as a second camera.