It was clear again last night, but as the Moon was beginning to get more intrusive I only intended to work on the collimation of camera5 (200mm lens). However, after getting the best collimation I could, it felt a shame to waste good imaging time so I went to get even more data on Arcturus.
So the above image is a composite of 2025-04-16 data of 24 subs @ 5-mins per sub, 2026-04-18 data of 18 subs @ 250 secs per sub, and finally last night’s 2026-04-22 data of 30 subs @ 4-mins per sub. That’s a grand total of 72 subs and 5 hours and 15-minutes of total integration time. The background is glassy smooth and the stars look great. So Arcturus should really be considered done on the 200mm array.
