bpulv wrote:
First of all, is the lens a 24-70mm f2.8 FX lens? Your post says 28-70 f2.8 and that may be an error. Secondly, are you using it on a full frame camera or a crop frame camera? Vignetting is common on a wide angle lens with a wide aperture setting. However, that does not seem to normally be a problem with the Nikon 24-70 2.8.
On my D800 there is a Vignetting Setting on the Shooting Menu. My best guess is that you need to check that.
Why would that be an error? The 28-70 was a very popular lens.