Hector Javkin , Oct 25, 2009; 01:11 a.m.
I'm attaching a 100% crop of a photo taken at 300mm and f/5.6, to which I applied no sharpening. I've already put up the hummers in flight which I've captured with this lens, so I didn't want to add them here, but yes, the AF is fast, even on lower-end bodies. I've used it with a D50, D90 and a D300.
Nikon 70-300mm VR lens at 300mm f/5.6, VR on, no sharpening in post