Thread: Horsehead in Ha Widefield (300mm f4)
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Old 30-12-2009, 12:29 AM
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dugnsuz (Doug)
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dugnsuz is offline 		 
Join Date: Aug 2005
Location: Hahndorf, South Australia
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Cheers H,
Astronomik 12nm Ha EOS clip in filter...I believe they do a 5 or 6nm version too, but lots more $$$! I think 12nm is the sweet spot for DSLRs though.
Cheers
Doug
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