Three differents process of photo of M20 - 11 m 44 sec - 12 sub frames 1 min
links to large scale:
http://i1063.photobucket.com/albums/..._m20_2k_1m.jpg
http://i1063.photobucket.com/albums/...s_m20_a_1m.jpg
http://i1063.photobucket.com/albums/...m20_1k2_1m.jpg
One photo with 33 subs of 30 sec - 16 m 30 sec
And two photos with detail of central star illuminating the star formation jets.
GSO 305 mm - Canon Rebel XT