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i'm sure its fine..some reflectors at diff times have different focal lengths..some are f4/f5/f6 or even f8.
the 8" still gathers much more light than the 130eq, which is what is important -the optical imperfections show up a little more at f5 than f6 - but its ot a big difference. you will need to barlow or use shorter f/l ep's to zoom in anyway - but thats true of most dob mounted newtonians
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