I have the lens on my D810.
Per
+ Haptic
Contra
- Pretty strong chromatic aberrations, even at f / 4 & f / 5
- Strange cracking - stability?
- Stability barely noticeable
- Accuracy of the AF - Well ...
When the focus fits, then the colors are really great. The focus also. But I can not rely on this thing really. Since I was f / 2.8 lifted me to the Canon 100 L and the 5D better.
Since it is the 2nd objective already and the quality is equally bad, I'll give it back. Here there is need for improvement.