Thread: Help needed: Sky Watcher 10" Dob can only focus on very close objects
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  #40  
Old 15-02-2017, 11:49 PM
astro_nutt
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Join Date: Mar 2005
Location: Melbourne
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Oh! I almost forgot. Check to see that the clips holding the Primary mirror in it's cell are just touching the mirror's surface. If they're too tight, pinched optics will result.
Cheers!
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