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Help with spacing... or something
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30-07-2016, 09:58 AM
Shiraz
(Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,918
field rotation maybe? How tight is your PA? do you get the same effect using a long exposure with another filter?
or if you use a guidescope, it could possibly be due to differential flexure and rotation,
Shiraz
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