M20-RGB.jpg
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M20-RGB.jpg
Object:M20 Trifid Nebula
Optic: CA300 (300/1140mm Newton) + Newtonmaster
Corrector: Keller 3" Wynne
Filter: Baader 50mm L-RGB
Camera: SBIG STL11000M C2 at -20°C, selfguiding
Exposures: R-G-B:28:28:28min, subexposures 4min
Processing: Pixinsight, Photoshop
Date: 2012.08.17 Austria, Osttirol