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The Horsehead and Flame Nebulae
[click on the image to see it 2x]
Camera: Apogee U16M
Filter(s): Astrodon 5nm Gen
II H-Alpha
Scope: AP155 F7 w 4" FF
Exposure: 8 x 15 minutes
Flesherton, Ontario, Canada
Mar 20, 2011
Ambient temp -6C; camera temp -35C; Moon was full (in fact at Perigee)
Images captured using CCDSoft5
Images calibrated (darks and flats), aligned and sigma-reject combined
in Maxim
Contrast / Brightness adjustments, Levels, selective HighPassFilter in
Photoshop CS4