[Stephane]

Hi all,

Apologies for my questions, but this was is really causing me problems.

Whenever I image with the L-Extreme filter, my images come out clean. Practically no nasty gradients. However, as soon as I image galaxies unfiltered. I am getting a weird light pollution pattern - almost identical in both images. I applied a dynamic background extraction (Pixinsight) on the two images below and then an autostretch. The result is terrifying. Please help! Integration times are 1h for the frame galaxy and 5h for the Sombrero galaxy (subs were 300” each. Too long?). I should also add that there is a street lamp not too far off. Could that be the issue? Any way to easily fix this in processing?

Many thanks,
Stéphane