bonedoc
I believe that Nikon must have produced a bad batch of these lenses. My criticism has nothing to do with the lens performance but rather a very tight and abrasive lens mount. i have a D750 and many other lenses, they all mount smoothly and securely. I have ordered two of these lenses, both recently, from different sources. Both American lenses with full warranties, and both have had this lens mount issue. So this is more a quality control problem than anything else. I plan to find a lens at a brick/mortar store so that I can try before buying.