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Hi Bill,
I appreciate your reply! I'm no expert at the subject of cone error but what I understand is that it is primarily a pointing issue, not a tracking issue.
Whatever is going on I'm having a hard time believing it is effecting scope #2 when I am actually imaging. I say that because I don't see any star distortion or rotation of one image vs the other when combining. Hopefully the issue will go away when I'm able to test this by guiding on the same star with both scopes. It was clear tonight but of course I had some equipment issues.
Peter
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