I have long wondered whether I want to spend the money for this appearance or to resort to a cheaper alternative. The finale I have come to the conclusion that comparable lenses from other manufacturers do not cost much less and the lens have bought. The optics are processed in Nikon quality and makes a very good impression. Everything is smooth and precise to operate. The AF works quickly and accurately. The distortion of my D700 fall wide angle very moderate. The image quality corresponds in each case to the expectations or even exceed them. Only for 16 mm slight loss of quality are at the margins recorded. But which can be removed easily in the EBV.
I highly recommend this lens on FX unrestricted definitely. At DX lens should also wide angle have no problems. Who will manage with the maximum aperture of f4 so have his joy.
