Hi Jon, great image and you've managed to show quite a bit of detail for 2 hrs of data, well done. As Chris mentioned some of your stars are funny shapes. I don't really have the experience to give you any idea's as to why that is. To me some look like focus issues, some look like field rotation from polar alignment being slightly out, and some look like coma. So I'm not much help there I'm afraid. Hopefully someone with more experience will have a better idea. Good job.
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