To compare the vignetting and light fall-off of the Sony DT 16-80mm against the DT 18-70mm at their longest focal lengths, we photographed a white target with a highly diffused filter; each lens was focused to infinity with its aperture wide open. The images were then analysed with Imatest and the full areas presented here at a reduced resolution. Bigger percentages are better.

With the DT 16-80mm zoomed-into its longest focal length, the light falls-off to 71.8% of the maximum in the corners. The kit lens beats it comfortably in this respect, although the DT 16-80mm has a longer range and a brighter maximum aperture when zoomed-in; you're also unlikely to notice any light fall-off with it in practice when zoomed-in. Now for some real-life results, let's head on over to our Sony DT 16-80mm sample images.