Thread: 10" f10 vs 12" f8
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Old 10-01-2014, 12:06 AM
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allan gould
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allan gould is offline 		 
Join Date: May 2005
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10" f10 vs 12" f8
I can't work out how much extra exposure I would have to do with a 10" f10 compared to a 12" f8 scope to give an equivalent ccd exposure.
Any geniuses out there that can assist?
Allan
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