Thread: Pics of GSO 8" F/9 RC scope...
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  #13  
Old 26-07-2008, 10:26 AM
toyos
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Join Date: Apr 2008
Location: Sydney, Australia
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Why would someone choose an 8" f/9 RC with 40-45% central obstruction over say a 5" f/7 APO refractor with a field flattener & zero central obstruction??
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