Lagoon Nebula taken over 4 nights (20th May, 1st, 5th & 6th Aug) with my Takahashi µ250CRS at native 2500mm F10. The camera was the ASI6200MM with Antlia Pro 3nm filters.
Skies were Bortle 5/6, and I had cooled the sensor to -10C, Bin1, Gain 0 (yeah don't ask
), Offset 50. The final comprised of :-
Ha: 26x 5min
Oiii: 30x 5 min
Sii: 24x 5min
Total: 6 hrs 40 mins worth
https://astrob.in/0iz139/B/