I'm not trying to pixel peep the image, but while putting it up on my 24" screen, felt that image was not sharp. It's a tokina ultra wide angle lens. I was in Ottawa for a short trip and had a chance to capture this image near the science museum. It was one of the coldest nights when I was lugging around a tripod (my friend's) with 2 layers of gloves and 4 layers on me, would have been frost bitten if I had spent another hour outside.
The image in question is below.
Body - D7000
Lens - Tokina 12-24f/4
Settings - ISO 160/f20/15s/24mm/1.3eV
Does the lens has to be sent for fix or is it just working fine? Thanks!!