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Thanks Brendan and Andrew.. I do have a very large dew shield that is as long as the scope. Lightweight flex shield I made.. I will give what Brendan suggested as I thought this type of thing might be the case. I could also try removing the IR filter on the CCD or play with some spacing as well. At least I now know that this is a common problem and need to play around to solve it... Seems that this hobby is challenge based.
Thanks all
Mardy
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