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8 times better than a Ritchey-Chretien ?
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22-11-2013, 03:33 PM
RickS
(Rick)
PI cult recruiter
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
Allan: if you want to look at the strengths and weaknesses of various astrograph designs then this is a worthwhile read:
http://willbell.com/TM/TelescopesEye...trographs.html
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