After my efforts on the Dumbell Nebula a short while back I’ve been collecting more data. I actually threw away my luminance subs and collected 250 minutes of new luminance data as 600s subs, and 50 minutes each of 300s subs in red, green and blue.
This is how the image now looks:
I’m told that some Ha and OIII data will add to the image, so I shall be attempting to collect that over the next few clear nights.