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I would have to agree with Mark , when it comes to planets I think 180mm is a bit on the small side and a good 10" newt would eat it alive and the other issue is F9 is very slow for DSO imaging and although a good reducer would get it down to F7 you may find you can only image one object per night.
I guess what I'm trying to say is I find most refactors are like SCTs , a jack of all trades scope but at a higher level.
If I had money to burn I would probably buy one the 12" Tak Mulons for planet imaging and visual and a fast astrograph for other stuff.
Zane
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