They sum up: "
Actual photographs with all of the variables that introduce, I doubt the difference at 70mm or 200mm would be of any visible significance. At 135mm, though, I think they might be."
Any idea if the new Nikon does better on focus breathing? For tight portraits (200mm, close subject), the previous 70-200 VR was effectively a 135mm lens.
Also, I'm really concerned about their use of fluorite elements in this and other new lenses, which seems like a very dangerous risk since Nikon
continues to warn us that, "
Fluorite easily cracks and is sensitive to temperature changes that can adversely affect focusing by altering the lens' refractive index."