HI Guys.
I asked the question a little while back where it was a good idea to insert a CLS light pollution filter in my imaging train when imaging with LRGB filters as well.
I liver 7.5Km from Sydney CBD so light pollution is an issue for me. I found a site in the UK where someone was doing exactly that, and getting quite good results.
I gave it a go last night, and I have to say I'm pretty happy with it.
I chose the Lagoon because it was a nebula and also because there is a lot of stars and very little black back ground at my focal length. Marc thought that that might be an issue.
The other issue this has solved for me is that I was getting very bloated stars in my blue channel and the CLS filter has cured this issue. I must have be UV light bloating my stars as the CLS has a UV block as well.
The image below has had the following done to it in pix insight only.
R=300secx5 G=300secx5 B=300secx5 No Lum
Stacked with bias and darks only, no flats.
Back ground extraction to remove gradients.
Back ground neutralization.
Colour calibration
histogram
curves.
I'm pretty happy with the result for a quick a dirty test.
http://www.flickr.com/photos/sandy07...8926/lightbox/
Whadaya think??