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Old 10-06-2008, 02:47 PM
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Robert_T
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Join Date: Oct 2005
Location: Australia
Posts: 2,578
Will a Barlow improve my PhD guiding?

Hi All, looking at my images from Sat night I notice considerable star elongation (ovalling) despite the fact PhD was locked on guding happily throughout. Now the prime focus FL was about 450mm and I'm guding with a ZS66SD that is about 380mm... would a barlow improve my precision?
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