This image was the first prize in the 2013 contest.
See details here:

http://www.astrosysteme.at/eng/news_12-13.html

NGC 6188 is an emission nebula located about 4,000 light years away in the constellation Ara.
The bright open cluster NGC 6193, visible to the naked eye, is responsible for a region of reflection nebulosity (The Bluish region at the upper part of the image)(WIKI)

At the lower Right - the Bipolar NGC 6164 and 6165 (see next image...)

Imaged with the 16" f3.75 Dream Astrograph.
Apogee Alta U-16M camera.
HA-RGB image
Ha - 60 min
RGB 20 minutes per channel

(Total of 2 HRS)

Imaged from Tivoli farm in Namibia June 2012.