Thanks all for the comments, focus was just done once at the beginning, i know i need to do it more often
This was just a trail run to see what i could actually get as i'm in very light polluted skies and hence narrowband is the way to go.
Looked at the shadows setting in cs4, sure makes a diff. Thanks for that will play with it, but i'm going to try for better data longer and better focused if i can and at the same time try not to spend a fortune to get it.