Sunday, October 26, 2008
Sh2-171
S-II, H-alpha and O-III as a Hubble palette
H-alpha, O-III, synthesized Blue as a "Natural" color
H-alpha
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Sh2-171 is an emission nebula in Cepheus.
I have shot few objects from the Sharpless catalog before, I find them interesting and
not too common as an imaging targets.
Here is three versions, first is a narrowband color version in Hubble palette,
second is a "natural" color version with synthesized green from H-alpha and O-III.
Third, black and white, is a hydrogen alpha channel only.
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Imaging data:
Camera,
QHY8
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Filters,
Baader 7nm H-alpha, Baader 8,5nm O-III and Baader 8nm S-II
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Optics,
Tokina AT-X 300mm @ f2.8
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Exposures,
9X 1200s H-alpha, 3 X 1200 O-III and 3X1200s S-II + flats and bias
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Guiding,
LX200 GPS 12" + PHD-guiding and Lodestar
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