Sir Fred, What are you doing?...using scientific filters for RGB imaging.
You're a brave, bold man. I've tried this but failed. I found it difficult to getting the right balance as the BVR filters have considerable colour cross over. Particularly the V (visible). Actually in retrospect, you haven't done a bad job. The purple tone around the nebula gives it away and looks like the minimum filter on the stars has played some havoc. Still take my hat off to you... but seriously, do us a favour, next time your in SA swap your OIII and SII filters. I think this will open up more targets for you. I recall an offline discussion around filter selection... I suspect you should have gone with the RGB set after all.
