Sending it back. The focus hunts quite a bit on objects that it should pick up quickly. One lens 35-70 f/2.8 AF-D barely works on it if at all. Next issue is with fast lenses f/2.8, 2.0, and 1.4's it aperture drifts as you focus in close (increases). 105 f/2.8 AF-D, 135 f/2.0 AF-D DC, 60 f/2.8...