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How to focus finder scope on GSO Dob?
Hi all,
I have recently acquired a GSO 8" dob, however I am not sure how to adjust the focus on the finder scope?
There is a front section, which has the primary in it, then behind that there is a ring (that does not seem to do much), then the body of the finder scope. Moving the primary forwards or backwards does not actually seem to bring anything into focus - I think I may have to move the primary closer to the eyepiece but I can't, as it's at it's maximum now.
Any ideas?
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