Some of you may have noticed that with modded DSLR's that there can be a red or orange ring around even perfectly focused stars when you use even a very high quality lens. This is because lenses were not designed to accurately focus far red all the way to HA. Lenses are designed only for visible light.
Fortunately ImagesPlus has a star reduction function. I used IP to first star reduce only the red layer until there was no sign of red colour bleed. I then used star reduction slightly on all colour channels equally and then a bit of RL enhancement.
Result here 11MB
http://d1355990.i49.quadrahosting.co...MCmosenhc2.jpg
Here is an animated gif showing the enhancement on a 100% crop 1MB
http://d1355990.i49.quadrahosting.co..._09/smcenh.gif
Below are the same two images
This is also very handy for narrow band combination to get rid of any colour haloes.
The purple ring you get with achro scopes is a combination of red and blue haloes.
Bert