GSO 305 mm - Canon T3 - 8 x 4 min (32 min) - ISO 800 - OAG - Skyglow filter - Coma corrector
I am working with cluster, but why not a nebula.again ?
The file is larger than 200k, therefore only by link:
http://astronomia-e-astrofotos.10697...2082/m8-k9.jpg
http://www.astrobin.com/212147/