M17, Omega Nebula



  • Exposure time: 180 minutes (20 minute 2x2 binned sub-exposures)
  • Processing: Nebulosity 2.3 (pre-processing, stacking); RegiStax 5.1 (waveletting) and Adobe Photoshop CS4 (post-processing)
  • Lens/telescope: Vixen VMC260 (10.2") Cassegrain at f/11.5 with Baader H-alpha 7 nm narrowband filter
  • Camera: SBIG ST-8300M (T: -23 degrees Celsius)
  • Mount: Astro-Physics Mach1 GTO (guide rate: 1x, PEM activated)
  • Guiding: TS OAG + SX Lodestar + PHD (RA Aggressiveness 70; RA Hysteresis 20; Min. motion (pixels) 0.70; Star mass tolerance 1.00)
  • Location: Zoetermeer, The Netherlands
  • Date: July 15 - 16, 2010
  • Notes:
Lots of detail enhancement (unsharp masking, waveletting, star reduction) was neccesary due to bad seeing conditions.

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