Nikon Nikkor AF-S 16-35 mm f/4G ED VR
8. Vignetting
At the difficult combination of 16 mm and f/4.0 the vignetting is almost imperceptible because it amounts to just 10% (-0.30 EV). What’s interesting on stopping down that aberration’s value doesn’t change – at 24 mm focal length and at the maximum relative aperture you get the same result, 10% (-0.29 EV). Only closing the aperture to f/5.6 can make the vignetting descend lower, to 7% (-0.21 EV). You have the biggest chance to notice the vignetting at the combination of the maximum focal length and the maximum relative aperture where it amounts to 13% (-0.41 EV) so it is still negligible. By f/5.6 it disappears almost completely, being just 5% (-0.14 EV).
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Let’s check how the situation looks on full frame.
The vignetting is noticeably higher here but, taking the parameters of the lens and the performance of its competition into account, we shouldn’t complain too much. In fact even here you can praise the lens a little bit. At 16 mm and by f/4.0 the vignetting gets to 41% (−1.51 EV). It is a lot but still several percent less than in the case of the Tokina 17-35 mm f/4.0 with a narrower angle of view. On stopping down to f/5.6 you can decrease the vignetting level to 31% (-1.05 EV). By f/8.0 that aberration amounts to 25% (-0.82 EV) and by f/11 it is 24% (-0.79 EV).
In the middle of the focal range the situation gets noticeably better. At the maximum relative aperture the brightness loss in the frame corners reaches 26% (-0.86 EV) and it decreases to 16% (-0.50 EV) after passing to f/5.6. Further stopping down doesn’t bring any significant change because by f/8.0 and f/11 the vignetting amounts to about 15%.
At the maximum focal length and by f/4.0 the vignetting is moderate, reaching 28% (-0.95 EV). That aberration disappears almost completely by f/5.6 where it is just 12% (-0.38 EV). By f/8.0 the problem becomes marginal (9%).
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