Quote:
Originally Posted by billdan
Were you focused at infinity?, because it looks like the shadow of the secondary is showing.
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Thanks Bill. That sounds an embarrassing but likely explanation. Until the skies clear I can't test focus though - no easy distant targets from the window here!
That said, I measured it all out in comparison to the QHY8 it replaced, and it should have been within a couple of mm of focus. But I could've stuffed that up. Not sure how far out it'd have to be to give such an effect.