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Old 02-12-2010, 03:46 PM
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Moon (James)
This sentence is false

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Join Date: Oct 2008
Location: Melbourne
Posts: 1,158
Peter,
I can't view your attached image properly for some reason, but I would say this is a reflection from the CCD back to the LPF and then back to the CCD.
If it worries you, then don't use the LPF. Most of the time it will be ok becuase the stars in your image are not so bright.
James
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