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Let's compare 6", 8", 10", 12"
If we use the 6" as 1
8" - 77% more aperture or .77X
10" = 277% more aperture or 2.77X
12" = 400% more aperture or 4X
Now the question is what do you want to do with the extra aperture?
Planets?
bright DSOs?
Dim DSOs?
Nebula
Galaxies
Where are you falling short now?
Certainly 77% more aperture is worthwhile, but if you can swing the cost AND the size and weight, I would suggest you jump to the 10 or 12.
Do you sell the 6" or do you keep it as your smaller grab and go?
Or do you sell the 6" and pick up a 4" refractor as a smaller lighter more portable grab and go to complement the bigger Dob?
I have:
Binoculars - 2 sets
Grab and Go - 3" refractor and 5" mak
Light Bucket - 8" Dob that will someday be upgraded to 12"
I use them all.
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