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Really nice image, if we ever get clear skies again in QLD this is one I am interested in trying myself.
As for the issues with the stars I would say this is not related to tracking as every star would move the same in your field of view not only the ones on the edges, this looks very much like coma of some type.
I am no expert but could there is something with the image train you are using, maybe you already mentioned it with the chip being so large. This could be causing both issues. From your list number 2 seems more likely or the compatibility of 2 with 4. Like you said you have had no issues before the new camera. One thing I did notice is the elongated stars are on the right hand side of the image and the cross stars are on the left. Could there be some pinching or is the camera too heavy and leaning one way on the focuser?
Carl
Last edited by carlstronomy; 06-01-2021 at 11:04 PM.
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