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Ok so I managed to get out last night and do some imaging. Wasn't the most successful night and there are some issues I need to diagnose:
1. Guiding - Total RMS didn't get below 1.5, & it moved between approx. 1.5 & 3.5 pretty consistently all night. I analysed the graph this morning and my RA graph was sinusoidal, not at all flat. DEC was fine. My PA was good, and I balanced both RA and DEC pretty well. Could this be back-lash in the RA axis? If so how do I get rid of it?
2. Star shape - I suspect this is related to my RA issue in point 1. On inspecting my images I noticed that I had egg shaped stars. It was across the entire image and was vertical in nature (i.e. egg shaped from top to bottom). Now I don't think it was tilt as the amount of "egginess" varied. That is some were worse than others.
So all in all not the most successful night but hey it's all a learning experience.
Any help would be greatly appreciated.
Rene
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