I bought a Tokina 16-28mm f2.8 FX lens a few days ago. Of course I had to try this one quickly on my Nikon D600. Rather heavy equipment, but I do like the results very much. However this lens shows some issues with rainbow like flares around very bright highlights (see the last image for instance).
Edit 29/06/2017:
I swapped this lens for a Nikon 20mm f1.8 now. I prefer the low weight of this lens over the zoom facility of the Tokina. I also own an Irix 15 mm F2.4 manual focus lens that is less heavy than the Tokina. Both of these prime lenses do not have the flare issues :-)
"Koopgoot" - Rotterdam

Koopgoot
Loempia's - Rotterdam

Hoogstraat
Markthal - Rotterdam

Markthal
Old Town Hall - Gouda

Market - Townhall
Market square just before "Pakjes avond" - Gouda

Market - Townhall

Market square