Thread: GSO 10:1 Crayford on a Skywatcher 8" DOB
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Old 06-05-2008, 11:24 PM
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danielsun
Canon collector

danielsun is offline 		 
Join Date: Oct 2005
Location: Taylors Lakes Melb
Posts: 1,965
Yes, you definitely need a collimation tool.
Also make sure that before you drill your new holes in your tube that you mark the position of your new focuser along the sides or the holes with a pen in the collimated position.
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