What i mess up on the picture

[Karsaa]

And one thing popped to my mind...since i was before trying to catch some auroras....my focus was in infinity....and i just then didn't change the settings at all for this image

[HDNitehawk]

FYI, on FF it starts becoming noticeable below 24mm.

Look at this sample at 11mm
http://www.the-digital-picture.com/R...omp=0&Lens=977

VS 24mm

http://www.the-digital-picture.com/R...3&CameraComp=0