Hi everyone,
Here is my second attempt on M20, 1st was one year ago when my system suffered heavy reflection and vignetting; since then I have used a flatterner, it seemed does the trick.
Data was collected on 2 separate nights early June. 1st night: 38x10min of L, 2nd night: 9:12:10 x 10min of RGB. I used PI and PS to process.
Link to high resolution image:
http://www.astrobin.com/100902/B/
Thanks for looking
David