M13-Hercules-Globular-Cluster-web-crop
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Great Globular Cluster in Hercules. Nikon D7000, Sigma 75-200mm/f3.8 at 400mm (2x converter). Single 30 second exposure at iso 2000. Tracked with barn door tracker.
Great Globular Cluster in Hercules. Nikon D7000, Sigma 75-200mm/f3.8 at 400mm (2x converter). Single 30 second exposure at iso 2000. Tracked with barn door tracker.