Frames: Astrodon H-alpha 5nm: 20x300" -30C bin 1x1
Integration: 1.7 hours
Avg. Moon age: 14.12 days
Avg. Moon phase: 99.28%
Bortle Dark-Sky Scale: 8.00
Astrometry.net job: 99707
Locations: Casa de Rob, Oakland, CA, United States
Heart nebula - stt-8300m + 5nm astrodon Ha + canon 200 f/2.8L @ f/2.8
focus is difficult at f/2.8 but since the lens only has to focus one frequency, it's possible to use it wide open and get sharp stars. with OSC i used to run this at f/4.
rev B with 5 more frames (+25min) and background extraction
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