M13 is a very popular target for visual observers because it is such an impressive sight. It contains hundreds of thousands of stars. As the name suggests, it is located in the constellation Hercules and is about 25,000 light years from Earth. I updated the previous version shot in late 2012. This new, sharper version was shot at a dark sky site (ITS) in August 2017. Scope: AT111EDT at f/5.7 Mount: AP Mach1 Camera: QSI 683wsg at –20C Exposure: LRGB, 3.1 hrs total