Hi,
This may be of use to astro imagers.
The Olympus background tool kit.
http://www.olympusmicro.com/primer/d...ddownload.html
I've tried various software for removing gradients but this one works the best for me.
Easy and quick to use!
I've attached a before and after of comet Lemmon from earlier this year. I never took any flats or dark frames, so it shows quite dramatically the difference.
Hope it's of use to others.
Cheers,
Justin.