NGC 7023, Iris Nebula
Exposure time: 240 minutes (12x 600s + 8x 900s)
Processing: Nebulosity (
pre-processing, stacking & DDP)
; Adobe Photoshop CS4 (
post-processing)
Lens/telescope:
Takahashi FSQ-106ED (4.2") quadruplet ED refractor at f/5
Camera: QHY8 one-shot colour CCD
Mount: Astro-Physics Mach1 GTO
Guidescope: Vixen 70/400 mm + ST-4
Location: Wateren
, The Netherlands
Date: September 18 - 19, 2009
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