Hi Roberto,
Two things come into my mind when I watch you image:
- It is mirrored left to right. For some reason this is the default alignment of the FIT-format, but you can change it in the settings for the FIT-format.
- The green channel is overly emphasized, shifting the usually very pronounced red-blue hue of this nebula towards brown. I'm pretty sure that this can be fixed easily.
Besides that you accomplished a very nicely processed photo.
(Incidentally I imaged the same object one year ago with almost the same field of view ( see
http://www.pbase.com/gbachmayer/image/142584422/original), also a HaRGB composite).
Best regards,
Gerhard