[VPAstro (Andrew and Cam)]

Hi All,
We have noticed the over the last little while, we have started to get chromatic aberration on our stars in images. The scope is new, and was a 50th birthday present from my father in law. For some reason, our images seem to be getting worse and not sure if it is the camera, scope or processing that is the issue. The attached image was taken last night with a canon 600d and consists of 65 X 90sec lights at iso 800, (dithered), 30 dark frames taken at the same time, 30 bias and 30 flat frames. Stacked in DSS and processed in CS2. Light pollution is also a real problem here, but I was able to see Eta Carina neb with my naked eye. Noise has also become a pain now and is difficult to remove. Just trying to identify if the problem is the scope, camera or processing.
Thanks
Andrew & Campbell