Thread: Observing with a 18" Obsession.
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  #16  
Old 19-06-2005, 09:46 PM
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Orion
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Orion is offline 		 
Join Date: Jan 2005
Location: Swansea N.S.W.
Posts: 1,107
Mark if the mirror is not polished or aluminized you can always make it a shorter focal length.
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