Great Hercules Cluster - M13 15 x 120 second subs ISO 1600 15 Dark Frames 50 Bias Frames Total Integration Time : 30 Minutes Explore Scientific ED102 Orion Sirius Eq-g Mount Orion 60mm Guidescope Canon T2i DSLR  ZWO ASI120mm Mini Guide Camera Optolong City Light Suppression Filter  Author : Larry Byrge Location : Jacksboro, TN https://byrgeastrophotography.com/