The globular cluster M13 can just bee seen with the unaided eye in the constellation of Hercules under dark and clear skies. If you can observe this object with a pair of binoculars or a telescope you will be rewarded with a truly spectacular sight of around 100000 stars closely packed together in a tight sphere

200mm F5 Newtonian telescope on a EQ 5 mount. Starlight Xpress MX716 CCD camera

10x30 seconds exposures. Processed with Starlight Xpress software and Astromix.