IC434 Horsehead Nebula near Star Alnitak - 14/11/2010 (Reprocessed RAW stack)
I revisited this stack of images in early 2012 and reprocessed it with the benefit of a bit more post-processing experience.
DeepSkyStacker 3.3.2 Stacked 80% of 5 Images ISO 800 180 Sec, 2 DARK, 3 BIAS, 0 FLATS, Post-processed by Photoshop CS5.
Things to note are that the image is more balanced with less noise evident compared to my original processing. I tried to ensure that the background sky (from skyglow) was not too bright and the central portion not over-exposed by paying more attention to stretching the mid-tones rather than squashing the whole range as I had done initially. However, the nebulisty is poorly shown mainly due to a lack of light frames and has consequently been streched too far.
Telescope - Apogee OrthoStar LOMO 80/480 with Hotech SCA T-Adapter, Hutech IDAS LPS-P2 filter, Canon 400D DSLR, Ambient xxC (not recorded). Mount - Skywatcher NEQ6 Pro. Guidescope - Orion ShortTube 80 with Star Shoot Auto Guider.