Hi!,
This image of the Tulip Nebula includes an area with an intense emission and reflection areas. I have tried to balance 9 hours of H Alpha with LRGB, trying to keep the color of the stars, to bring out even the weakest parts in H alpha but also to bring out the signal from the reflection areas. I do not know if I achieved a good result to do it, but I tried. I was interested to also show the dark nebulas LDN that some times are confused with the sky background and for this reason I have made a total exposure of about 15 hours with HLRGB. I linked in the annotated also the location of the famous source Cygnus X-1.
Cheers,
Fabiomax
http://www.astrofabiomax.it/sh2101.html