Thread: William Optics Flat61A back focus
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Old 08-12-2019, 01:09 PM
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Camelopardalis (Dunk)
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Camelopardalis is offline 		 
Join Date: Feb 2013
Location: Brisbane
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Easy?! Naaahhh

Did you try to achieve focus with the scope focuser? And did you measure (with a ruler or tape) the flattener to sensor distance?
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