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Old 21-02-2010, 09:38 PM
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tlgerdes (Trevor)
Love the moonless nights!

tlgerdes is offline
 
Join Date: Mar 2009
Location: Sydney
Posts: 2,285
OK, I had something similar to this, astigmatism. Your focal plane of the camera may not be completely square. Adjust focus either side and see if your star image elongates in directions 90degrees to each other.
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