MWay core! Wonder what portion of the original frame is this crop. The upper left part looks free of the terrible aberration. Sometimes the apparent aberration could be caused by the software failing to register the stars due to severe distortions of the image. You may verify this simply by checking star shapes in individual exposures.
You may also want to check the alignment of the lens, or simply get a fast prime lens of better optics.
Noob astrophotography
Re: Noob astrophotography
Hi is the m101 taken in sg?
Re: Noob astrophotography
Hello! Yes, the M101 was taken in SG, but I'm planning on gathering data for a better shot in the near future (when the clouds clear).