Hi Guys,
Last night, I attempted to take a series of 520 photos with a exposure time of 2 seconds of the Andromeda Galaxy, but got this(Click on it) when done stacking and post processing. I was using a Canon 400D with a 17-200mm sigma lens, with the length being at 200mm, and a f/5.6 (The lowest I could go). I took all the other frames(eg. light, dark bias...) and used a remote to take the photos. I think it could be because of the light pollution, or I just need more frames? I took the picture in West Sussex, England.
If anyone could help me find out what's wrong, or needs more information, please comment on it, and I will get to you ASAP.
Thanks!