This is a very interesting Lens, no doubt, Nikon's 200/400 f.4 for wildlife shooters is a bit of a Legend, not great, but damn good. Canon's 200/400 will without a doubt be better, but. I'm a wildlife shooter, Africa & Arctic predominantly, I have waited so long for this lens that I decided to get the 400 f/2.8 VII then a few months back added the 600 f/4 V II, The quality of those two Lenses now makes this Lens superfluous to requirement, and as "Neuroanatomist rightly comments, I'de rather have my 400 f/2.8 & 600 f/4 on my 1Dx with option for f/5.6 & (Now) f/8. I just need a little munchkin to carry the Kit around, but I'll manage the minor downside for the upside of Versatility. I also agree with others that say this Lens will likely be a "Must Have" & I wish them enjoyment.