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I've been having similar thoughts..... I love refractors, but as we know to get a good, fast refractor with a longish focal length, ie big aperture, is crippling, cost wise and mount wise!
I was thinking long the lines of a Schmidt-Newt or something too..... I figure if it is 8" f/4, you can barlow it, and only end up at f/8 - not too bad, considering the ED80 is f/7.5 anyway.....
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