M20 & M8, Trifid and Lagoon Nebulae



  • Exposure time: 105 minutes (7x 900s)
  • Processing: Nebulosity (pre-processing, stacking & DDP); Adobe Photoshop CS2 (post-processing)
  • Lens/telescope: Takahashi FSQ-106ED (4.2") quadruplet ED refractor at f/3.6 (Reducer QE 0.73x) with Baader H-alpha 7 nm narrowband filter
  • Camera: QHY8 one-shot colour CCD (Gain: 0, Offset: 115)
  • Mount: Astro-Physics Mach1 GTO
  • Guidescope: Vixen 70/400 mm + ST-4
  • Location: Zoetermeer, The Netherlands
  • Date: July 30 - 31, 2009

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