I realize that the corner of my pictures are blur whenever I use a Tokina 11-16. My subject is also out of focus after the auto focus lock on it. I am currently using a D7000. I tried shooting using nikon 18-105 kit lens and there no problem with the pictures. So im wondering if there is a problem with my Tokina 11-16. May I know whats the main cause of the problem ?
This image is taken with nikon 18-105 kit lens. Settings: ISO 200, f/4.5, Exposure time 1/125s, Focal length 35mm
This image is taken with Tokina 11-16. Settings: ISO-100, f/3.5, Exposuretime 1/125s, Focal Length 16mm