I saw that Jack has this and his seemed good. I got one today and mine looks like a terrible copy. I only had time to fire off about ten handheld and AF frames at F2.8 and 5.6 to compare them and they are really disastrous: not very sharp at all on centre and even at f5.6, smeary and nasty at edges and corners with, get this, ORANGE fringing where you'd normally expect purple.
I'm going to run it through some tests tomorrow possibly on the D800 as well as the E just in case there's a difference (seems very unlikely) and using Live View to focus but so far, though I like the FOV and though I can imagine some interesting creative uses for the smeariness, it seems that this one is a pup.
But Jack knows his glass... so I assume I just have a bad copy or it needs fine tuning.
Anyone else got one?