Double Cluster, a “symptom of the Universe” from my telescope 9 hours, 30 minutes. 750 mm. F/3. Bortle 2. Full tech specs and gear: https://www.astrobin.com/e8jnw1/
9 hours, 30 minutes. 750 mm. F/3. Bortle 2.9 hours, 30 minutes. 750 mm. F/3. Bortle 2.