Hi Ivo
No narrowband.
As to the problems.....
1. stringy background. (
I knew you wouldnt let that one go ) There were soooooomany stars in this image, I tried to tone them down, to make the neb stand out more. I think reducing the star size did the trick in that respect, but left the background that way as a result.
2. Also those many stars were slightly out of focus, because of the trade off in focusing due to no field flattener.
3. As a result of no field flattener, it seems that the stars towars the corners, that were affected, tended to throw the color off, maybe. Those stars seem to green.
does any of that make sense to you?
All in all, with all of that, I like the image
At anyrate, the field flattener came today, and with luck from the weather supervisor, I'll try it out tonite.
Che