Here is the Great Cluster in Hercules, otherwise known as Messier 13. I have been using PHD2 with my new Orion Starshoot Autoguider, and I am finally getting the settings dialed in. Click on the image to get a larger version.
Image Info: Canon 60D at the prime focus of the KPO 18″ Reflector. 15 x 120 second exposures for a total integration time of 30 minutes. Captured and stacked in Nebulosity, processed in StarTools, and finished in Aperture.