Nikon Nikkor AF-S DX 18-140 mm f/3.5-5.6G ED VR
5. Chromatic and spherical aberration
Looking at images out of focus you can notice slightly yellowish cast and a slight blue dominant before the focus. That effect is not very pronounced, though, so you shouldn’t complain much about the correction of the longitudinal chromatic aberration.
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The common feature all 18-xxx mm Nikkor lenses share are problems with lateral chromatic aberration. The new 18-140 mm VR is not an exception to that rule; a graph, posted below shows it very clearly.
At the maximum focal length you must take into account the fact that the chromatic aberration will rise to a significant level. Although the stopping down helps you reduce it, you never see it becoming low. It would be also difficult not to perceive it at the shortest focal length. The best situation is in the middle of the focal range where the aberration keeps low or medium levels so its values range from 0.06% to 0.10%.
Spherical aberration
The spherical aberration in corrected in the right way. The light spreads evenly in both circles (in front of and behind the focus); only on the very edge you can notice some slight differences.