|
Paul,
Having similar problems with my OAG.
I have now come to an understanding that the problem of oval stars is the prism is picking off light right from the edge of the imaging circle, hence especially when not using a flattener, the stars will always look oval.
I was able to get focus with my eyepiece and the stars were nice and round. Howevere when using the Rmote Guide Head I was getting lemon shaped stars. I now know that the reason they were lemon shaped was because I was not in focus. Apparently they do turn nice and round when in focus.
So if you can work out how to get your guide camera closer to the prism, you might solve this problem.
I still need to confirm all of this in a real test, but from what I have gathered through various forums, it should work.
Fingers crossed!
Mark
|