GSO 305 mm - Canon Rebel XT - ISO 800 - 15 x 4 min - 60 min - OAG - Coma Corrector - Skyglow filter
large scale:
http://www.astrobin.com/full/80137/0/
note: some black filaments at left-bottom and right-top vertice are damage in the sensor, not a real structure of nebula