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Originally Posted by mldee
Still seeing same distorted stars pointing in various directions, so it's not the FR.
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By various directions do you mean distorted away from the centre? If so it would be field curvature.
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I noticed with bright Canopus that as I focused it, there was a large halo around it, and a bigger one further out.
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This sounds like a reflection, perhaps off the FR you were using at the time.