Alright, I am having an issue with my wide-angle lens for my Nikon. It seems to have an effect on the stars when they get closer to the edges of the photo.
They sometimes are either sideways v's or sideways capital T's. I'm guessing it's something to do with the lens, or just coma. Am I right?
Is there anything I can do to either reduce or stop this effect from happening?
Thanks.

