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Originally Posted by O
This decision is only based on my limited knowledge on the topic and would welcome any comments if anyone feel that this is definitely not the way to go. Please note that I could end up with BOTH. Is that a bad thing and will just be a waste of money?
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I'll relate my experience to you.
I was viewing for a few years with a 10" dob and decided to get an ed80 as a second scope. I was very dissapointed at what I could see ( or couldnt see) in it. To be honest it seemed barely ahead of a pair of binoculars, and light polution really kills the usefulness of a small scope IMO.
I have since replaced the ed80 with a 130mm Vixen newt on a Porta alt-az mount. A 130mm scope isnt big, but it certainly leaves the 80 way way behind.
I strongly recommend the 8" dob as your first scope, as most people will very quickly outgrow what can be seen visually in 80mm of aperture, and likely get bored quickly. Darrens advice is good, 6 inch as a minimum to give satisfying views.
The dob can do almost everthing the 80mm can do, and do it better, and what it cant do can be done with a pair of binoculars. The same cannot be said for the reverse.