Thanks Cam.
I have noticed that with most of my images so far, the stars at the edges aren't very round and are a little streaky. It looks like the C8 has a bit of field curvature on the edges and the Focal Reducer/Flattener isn't enough to eliminate it altogether. I didn't have the budget to purchase the Celestron EdgeHD scopes (I would have loved to) which is supposed to give a much flatter field for astrophotography.
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