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About this Image
The constellation Sagittarius is situated with our central milky way and filled with dense star clouds, dust and nebulae.
The dominating Nebulae are M 16 (above center) and M17 (center) glowing in red H-alpha emission. To the right of M 16 there is the faint red nebula SH2-40.
Canon EF 200mm f/2.8 L lens at f/3.5
|Camera||SBIG STL-11000M at -20C, internal filter wheel|
|Filters||Astronomik Ha, G, B|
|Date||May 28, 2006.|
|Sky Conditions||mag 7 sky, high transparency, temperature 14 C,|
HaGB= 90:15:15 min (5-minute sub-exposures for GB, 10 min for H-alpha)
Image aquisition and calibration in Maxim DL 4.65; preprocessing in CCDStack;
Photoshop: curves, color balance;