M13, the large globular cluster in Hercules.  A compsoite of
thirty one 1 minute exposures, ISO1600.  Scope is a Meade
Schmidt Newtonian barlowed 1.5X for a FL of 1200mm at F6.  
Processing with Deep Sky Stacker and Photoshop.  Compare
to my previous image of M13 nearly two years ago
here.
Hazeldale Observatory Astronomy