Well, I was betrayed by focus, but the seeing was good, and I could shot the region.
I haven't, yet, a defined procedure to HaRGB, I am trying and experiencing. And the files Halfa are coming with appearence of too much noise. Perhaps I need much more number os files to get a good and clear one. Really, I don't know.
The red channel always is the worse in noise.
For reference I am using the image from:
http://www.irida-observatory.org/Nam...7/NGC3247.html
GSO 305 mm - Canon T3 - RGB: ISO 800 - skyglow filter - 6 x 240 sec / Halfa: ISO 1600 - 10 x 300 sec
http://www.astrobin.com/97574/0/
http://jsmastronomy.30143.n7.nabble....d212.html#a228
note: I am using the expression R+RGB because my set can not use all the benefits from Halfa: my Canon T3 isn't modified.
