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About this Image
The bright Lagoon Nebula (M8) in Sagittarius, ionisised gas with embedded dark globules, the gas is emitting mainly at the red H-alpha line,
accompanied by the Nebula M20 with its beautiful combination of blue reflection and red emission nebulosity.
The distance to these nebulae is approx. 5200 light years.
105mm TMB refractor with flattener at f/6.5
|Camera||SBIG STL-11000M at -20C, internal filter wheel|
|Filters||Astronomik H-alpha (15 nm) + LRGB|
|Date||Aug 08/12, 2004.|
|Sky Conditions||mag 6.5, high transparency, temperature 14 C,|
Ha = 120 minutes (10-minute sub-exposures),
LRGB= 10:15:25:25 min (5-minute sub-exposures)
Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP and color synthesis in ImagesPlus;
Photoshop: H-alpha blended to red (85%) and as L channel (15%); cropped, Noise reduction by Neatimage;