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Hi Grafted,
Welcome to the forum,I forgot my manners in my first reply to you.
STEVE is absolutely correct,
You would be FAR, better off with the GS-680 8" dob,than the smaller 6",GS 500.
A couple of reasons.
1 According to your spec's, the 6" has a Focal Ratio of F5,
You had better have some Reasonably high quality/Expensive eyepieces for it,to avoid seagulls in the outer Field of View,(FOV)
2 It wont deliver the same level of brightness,and detail on a given object,as the 8" will.
3 the 8" Scope,has a focal Ratio,according to your specs,of F6,a little more forgiving,on the less expensive eyepieces(I dont mean really cheap ones).
Enjoy the hobby,and dont forget the Binoculars,when finances permit,
They can show some Stunning Views,especially of the Milky Way,etc.
Regards.
John
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