Also M 42 on another night, seeing not quite as good. http://www.users.on.net/~josiah/New%...0inchwarmb.jpg
4 x 10 mins and 4 x 30 secs for the core, all at ISO 200 10 inch f5.6 newtonian and modded 350D cam. Only UV/IR filter used, with Baader MPCC
Both pics hand guided with ZWO cam and off axis guider