Thread: Is this a dud mirror?
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  #11  
Old 24-07-2014, 12:38 PM
raymo
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Location: margaret river, western australia
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With those dimensions it would be around f/2.75. Is there by any chance,
as Brian mentioned, a lens, [or a place where one could go] at the bottom of the focuser tube that would extend it to f/4 or 5 ?
raymo
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