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.



This is a "natural" color version with synthesized green from H-alpha and O-III.

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Imaging data:

Camera, QHY8 -

Filters,

Baader 7nm H-alpha, Baader 8,5nm O-III and Baader 8nm S-II -

Optics,

Tokina AT-X 300mm @ f2.8 -

Exposures,

9X 1200s H-alpha, 3 X 1200 O-III and 3X1200s S-II + flats and bias - Guiding,

LX200 GPS 12" + PHD-guiding and Lodestar