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Andy
That's an interesting image. The star at the top right looks okay, but on the others it looks like mis-registration of the colors - can you process again or just do a stack without registration to see what is going on over time. I can't really see any 'bumps' in the stars that would indicate poor tracking, but it does look like your collimation is out and maybe some field curvature too.
Remember - a new focuser won't fix tracking or poor collimation - so it's best to get those sorted first. Is the focuers slipping or just wobbly? Mine is holding up a STL 11k - which is a very heavy camera btw.
James
Edit - btw I can see potential here!
Last edited by Moon; 25-10-2017 at 02:33 PM.
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