[QUOTE=Shiraz;1052586]thanks Greg. Yes, I was surprised at the colour image, but still need to work on processing. The big problem is that the Ha stars are much smaller than the colour ones, so the nebula surrounding the stars has no colour data (it got lost in the fatter stars). I tried decon and morphological processing, but got nowhere. looks like I will need to separate out the stars and the nebula for different processing. Rick did something similar, putting broadband stars in a narrowband image, so it can be done.
Oh I see. I have used the RGB star layer under the Ha or narrowband image and then set the rgb star layer to lighten mode. Now anything lighter will show through. You can then boost the rgb star layer if needed or do a mask on the brigher stars of the narrowband image to help if needed.
I did this here and it worked well:
http://www.pbase.com/gregbradley/image/137164599
Greg.