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Old 25-04-2010, 09:04 PM
Hagar (Doug)
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Join Date: Oct 2006
Location: Australia
Posts: 4,646
This is M42 with QHY8Pro and FSQ106ED at f5 20 X 2 minute exposures.

I think the difference with most DSLR's is the sensitivity to Ha wavelength. Traditionally DSLR's are quite sensitive to OIII but reject Ha with a vengence.
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