Quote:
Originally Posted by SkyWatch
(I have seen some comments that it more than holds its own against 8" reflectors for DSO's, but is not so hot on the moon or planets at high power because of the CA.)
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I think it really boils down to your experience level and how casual an observer you are . I own an 8" F4 Newt which gets a lot more use than the 6" F8 Achro - I can use any focal length eyepiece and it is sharp and colour free ( with a low cost coma corrector fitted ).
I have had a chance once to look through the 6" F5 varaint and found the CA to be completely intolerable - the view were bordering on psychedelic.
Those achros I 'm afraid are one trick ponies - limited to low power view if you want the impression of chromatism and clarity.
FYI I owned a Celestron branded of the 6" Synta which sold here for $400 which was the going rate after a lot of people bought them when Andrews first stocked them and dumped them after a few years . $600 is probably a fair price for a tube as I think they are around $1200 new now.
This is all of course just my opinion as an owner - I know that peoples imporessions of scope performance and tolerance of CA blur can vary wildly.