My former copy of 70-300VR was not as sharp as this one. Even sharper Tamron was not in the same league with good copy of the 28-300 lens from the very last batch from Nikon. But the 70-300VR is much more tolerable to FT, then the 28-300 is. As more complicated is optical formula of any Nikkor, as more difficult and critically responsible is Fine Tune. The 80-400G or 28-300, for example. It is my own opinion, of course. THX! LZ