Fun with the new optolong l-extreme filter
M17, the Omega Nebula with an 8" newt, ASI071. 39x 10min subs, 6.5 hrs total. Captured over 4 nights in Aug with SGPro and processed in pixinsight.
I can't seem to get much OIII colour in the centre, just around the edges. Maybe I've overblown it in the centre when stretching, so might go back to it next week.
www.astrobin.com/1bh851/
Cheers Chris