Thread: QHY8, Coma, Reflections, and the MPCC
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  #9  
Old 10-12-2009, 01:08 PM
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Terry B
Country living & viewing

Terry B is offline 		 
Join Date: Mar 2006
Location: Armidale
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Peter.
I'm not sure how the donut on the primary could be the cause of the halos.
The donus should not get any light on it unless you have off axis light hitting the mirror. The secondary should shaddow the centre of the mirror completely.
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