Barlowed M17 in H-alpha light

IMAGING DATA
Optical train: AP130 EDF GT + AP 1.8x advanced barlow
Mount: Losmandy G11
Guiding: SMC Takumar 67 f/4 200mm guidescope + QHY5L-II mono + PHD
Camera: Canon 450D (mono modded by Hypercams, and peltier cooled)
Frames: 21 lights 10 min. ea. @iso1600, calibrated with 200 bias, 15 darks and 30 flats.
Processing: PI 1.8 + Canon DPP
Date: 2014-08-04
Place: General Pacheco, Buenos Aires, Argentina
Seeing & transparency: good/good (suburban skies with quarter moon)

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