Bought a D600 used on Ebay. Camera in great condition but when I put my VR 16-85mm G lens on it the pictures, and the image I see in the viewfinder has a circular vignetting. This does not happen with any other lenses. I have a 80-200 2.8D, a VR18-55mm G and a Tokina SD12-24mm G. Many more settings on this camera vs my others. What could be the problem?
Thanks.