M24 Small Sagittarius Starcloud, with M17 Swan Nebula above and M23 open cluster at lower right. B92 is the prominent Dark nebula on right edge of starcloud. Field simulates a binocular field of view. Taken from San Pedro de Atacama, Chile, May 2011 using Canon 7D (unmodified) and Canon 135mm lens at f/2.8 for stack of 6 x 2 minute exposures (unguided on Kenko Sky Memo tracking platform) at ISO 1250.
The Amazing Sky 