Thread: Secondary Mirror Offset?
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Old 15-10-2013, 08:06 PM
Stardrifter_WA
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Stardrifter_WA is offline 		 
Join Date: Sep 2010
Posts: 2,017
Good question Glen.

I too am confused by this offset on fast newts, which is probably why I have so much trouble collimating my 16" f/5.

How is this offset determined and why?
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