Thread: Experimenting with diagonals for visual back focus
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Old 30-05-2020, 12:48 PM
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Merlin66 (Ken)
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Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
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Changing the backfocus will impact on the effective focal length/ focal ratio.
On my C11 when the spectroscope is used the f10 becomes close to f11.
Here's the spreadsheet.
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Last edited by Merlin66; 30-05-2020 at 03:41 PM.
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