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Ghosting / double image effect
Since last night was one of the first clear nights we've had all week, decided to take the scope out and test out how she purrs...
Everything looked tack sharp, with one slight problem. If I move head little bit, I can see a ghosting effect. For example when looking at Saturn, i'd have to have my eye dead on the centre to see it as one, otherwise i'd see two saturns moving around each other!
Is this due to collimation or some other factor? Thanks guys.
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