Quote:
Originally Posted by glend
Do you realise that for $2300 (current price) you could have a wonderful Skywatcher MN190 Mak-Newt f5.3, 1000mm fl, . Fully corrected -no detectable coma, heavily baffled, amazing contrast, very small secondary mounted on the corrector - so no diffraction spikes. Reviewers suggest large APO performance at 1/3 the price. It is both a astrograph and a powerful visual scope. Yes i have one of these.
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While this is probably a thread for refractor fanboys
, I have to back up Glens comments in that I used one of these at SPSP and it is indeed a very nice solution and fantastic bang for buck in having many of the similar qualities to an APO refractor of aperture which would be nominally unaffordable , but with far less elements and you still get to have a big chunk of glass at the top end to catch dew and dust
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I saw a very refractor like high contrast image of Saturn that held up under high power. The only down side was the weight and it was up high on an HEQ6 and was swaying a bit in the wind.