Thread: Imaging question for newbie
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  #11  
Old 03-07-2007, 10:38 PM
rumples riot
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rumples riot is offline 		 
Join Date: Oct 2004
Location: Blackwood South Australia
Posts: 3,051
Steve, if you plan on using a fork mount in alt az mode, you will need a derotator so that field rotation is removed. Using a field rotator is not the preference; a GEM is the best mount for long exposure photography.
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