Unhappily the clouds didn't give me permission to do my job. Only one light frame !
RGB: ISO 800 - single frame - 240 sec - skeyglow filter
Halfa: ISO 1600 - 5 x 240 sec
No doubt ! Without the Halfa information the photo would be impossible ! The sky was very beautifull ... but the clouds ... those clouds ... I hate them !!!
GSO 305 mm - Canon T3 - RGB: ISO 800 - single frame - 240 sec - skyglow filter - Ha: ISO 1600 - 5 x 240 sec
http://www.astrobin.com/97102/0/