Nikon D4 Digital Camera Review$5,999.95
Chromatic aberration on the 24-70mm AF-S f/2.8 Nikkor lens was not an issue, with the camera rarely showing color fringing near high contrast edges. The lens does suffer from some vignetting, though this is correctable right in the camera (we turn all lens correction options off for our testing). We did notice that sharpness began to suffer near the edges of the frame, especially for wide angle shots, which did not always show up as color fringing in naturalistic settings. This still impacts sharpness, however, with the focusing errors resulting in a softer edge than you'd like to see.
The 24-70mm lens we tested on the D4 showed some significant distortion in our testing, mostly at the wide end of its focal range. At 24mm the lens suffered from 3.29% barrel distortion on the full-frame D4, though this quickly leveled out and became a pincushion distortion by the middle focal lengths. At 44mm we detected a 1.57% pincushion distortion, which is barely noticeable, which became even less of a problem at the full telephoto reach of 70mm.