The Great Hercules Cluster (M13) is one of the most prominent globular clusters in the northern sky. More than one amateur astronomer will focus on it as the first object when observing the sky. It can already be observed with small telescopes as a bright cluster of stars, and in larger telescopes we can observe it in its full glory. Contains at least half a million stars! Located in the constellation Hercules, its distance from Earth is approximately 23,000-35,000 light years. Its size is also fascinating, its diameter is 110-165 light years. I took M13 as a test image of the ASI2600mono CMOS camera. I have to admit that she made me very happy.