Thanks to Trevor for such an in depth article for someone like me who has just purchased an ebay scope with a GEM. Unfortunately seeing has not been good since I received it, but still trying to get the thing adjusted and oriented properly. I have twiddled everything on the scope, the RA dial turns too. Must be able to calibrate it or something? I had set the Lat for Brisbane, I live about the same Lat, but west. The scale for Lat is that fine that I would be hard pressed to get within 1 deg. anyway. Could someone please explain to me about setting the RA? Very useful site, many thanks. Come on sigma octans! will find you soon.
