M20, the "Triffid nebula", more lights added

M20, the "Triffid Nebula" in constellation Sagittarius. Distance about 7600 light years.

Less compressed versions in my Portfolio:

http://astroanarchy.zenfolio.com/p1072219942/h3197814b#h3197814b




This is a third version of the M20. Image gets deeper and deeper as more exposures gets added.

Previous versions can be seen here:

First,  http://astroanarchy.blogspot.com/2010/05/m20-triffid-nebula.html

Second, http://astroanarchy.blogspot.com/2010/05/m20-triffid-nebula-continues.html

An experimental Starless version to show the actual nebula.

M20, imaged with a Northern Galactic members remote telescope in Australia,

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcPOF-m8_SpqBOCJmzUa6IuQEcdqkbmHTfq5qnA2_8dE3sajkHXcIX9BSy-MTROM1tSzard3W8LeAKC7CIVa66uLghO3WdJxda98-NjAAQmb_8RbHNIu85yg5wvKrs5-T6WgsZTTyqEaY/s1600/NGTelescopeL.jpg 

Impressive instrumentation and great location in Souther Australia under a dark Sky, makes possible to go deep in very short time! 

Technical details

16" RCOS ja Apogee U9000 camera. 

LRGB combo.

LRGB-image, Luminance=5x300s + 5x600s, total 1h 15min.

 Red=3x300s, Dark and Flat calibrated. 

Green=3x300s, Dark and Flat calibrated.

Blue=3x300s + 1x600s, Dark and Flat calibrated.

Raw data is shared with Petri Kehusmaa and J-P Metsavainio

Processing workflow:

Image acquisition, MaxiDL v4.xxx

Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.

Levels, curves and color combine in PS CS3.

Cropped image at 100% scale