I had one of these for a short while back in the late 90's. It was an "ok" lens except that it vignetted quite a bit. Quite obvious when the field of view is even toned. The sharpness was quite good. I traded the lens for the 300mm f/4 Nikkor AF and I've been very happy with it, of course the Nikkor was a lot more expensive but worth it. RandyB