NGC 7293 - The Helix Nebula
R = Hα+R, G = OIII+G, B=OIII+B
Hα = 8 hours, OIII = 6.5 hours, R = 4 hours, G = 2.75 hours, B = 4 hours (in guided 30-minute and 15-minute exposures)
R = Hα+R, G = OIII+G, B=OIII+B
Hα = 8 hours, OIII = 6.5 hours, R = 4 hours, G = 2.75 hours, B = 4 hours (in guided 30-minute and 15-minute exposures)