While I am not as seasoned as some in regards to all thing camera, I have and use this lens. had it on my D4 and now on my 6D (ebayed the Nikon for a few dollars less than I paid. If you want this kind of detail, no one makes anything close)
It is unbelievably sharp and contrasty. As Roger says, it's at first a bit counter intuitive to set up. And the rings are unbearably stiff to rotate. Get ready to flex your muscles
However the images are almost chiaroscuro, so contrasty. Like no other lens I've used.
Rent one from Roger, or buy one from B&H. B&H is completely accommodating for trying as long as you do not damage it. Make sure you want it...
Not sure if you go less they also make a 50mm 2.8 which has got to be the bomb! May pick one up to play with. If it's anything like the bigger one with almost 1.3 f-stops faster too. May be more versatile.