M1 Nebula
H-alpha data from 2006, 2007, and 2008 on a Celestron C8 and a 10 inch Newtonian.
Exposures:
2006: 19x5 minutes @ 1265mm (C8 with focal reducer)
2007: 20x3 minutes @ 1275mm (10 inch f/5 Newtonian)
2008: 50x5 minutes @ 1390mm (C8 with focal reducer)
