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Old 23-10-2018, 10:28 PM
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billdan (Bill)
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billdan is offline
Join Date: Mar 2012
Location: Narangba, SE QLD
Posts: 1,368
Thanks for that link Rick, I just had a quick read of his .pdf describing what can be achieved with polarising filters.
As you say looks pretty cool, a rainbow version of the M1 Crab nebula.
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