Another try with Halfa and Canon T3. It seems I am learning something !
This time I used:
GSO 305 mm Canon T3 - OAG - Coma corrector
ISO 400 - 19 x 2 min (38 min) - Skyglow Filter
ISO 3200 - 31 x 2 min (1 h 02 min) - Halfa - 12 nm
The second photo is a comparison of signal in red channel. Only convertion from 32 bits DSS to 8 bits JPG in Photoshop. None manipulation or enhancement was done.
note: an horizontal black line on the top of image is an weird black line with source not identified yet.
http://www.astrobin.com/109174/0/
I used as reference to process, since I did't know this nebula, the magnific image from
http://www.martinpughastrophotograph...lae/IC4628.htm