When I bought the Nikon 16-35mm f/4 VR I read about the huge barrel distortion coming with it at 16 mm but I was not aware it was so … unnoticeable. Click on the animated gif above (1.1 MB, give it time to load) if the slide show is not running. You will see the original NEF files and the result from the automatic software correction for this lens (click here for more corrected pictures from Rome). Of course it is better after correction, but the distortion is not as disturbing as I thought. Maybe it goes worse with modern glass-and-steel buildings … not my usual subject anyway.