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Thanks guys! Rex, thanks for the advice - have viewed Ring & Dumbbell with my 8mm. I don't think Helix would stand higher mag with my setup though (ghost-out!). Will have to check out the Saturn nebula!
In my scope at f8, the 8mm is the equivalent to a 5mm in yours at f5. Your 11mm is about the same as an 18mm would be in mine.
Cheers -
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