LensTip.com

Lens review

Nikon Nikkor AF-S 58 mm f/1.4G

14 February 2014
Arkadiusz Olech

5. Chromatic and spherical aberration

Chromatic aberration

Longitudinal chromatic aberration quite often makes itself felt in fast lenses. Still, dealing with a high quality, expensive 50 mm device you can expect a good correction of that aberration; the Zeiss Otus 1.4/55 showed it is doable. Unfortunately the Nikkor 1.4/58G couldn’t cope with that problem which is clearly seen in the photos, shown below. The constructors, for unknown reasons, skimped on low dispersion ED glass and now you see the consequences.

Nikon Nikkor AF-S 58 mm f/1.4G - Chromatic and spherical aberration


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The lateral chromatic aberration is corrected much better as you can notice glancing at the graph presented below.

Nikon Nikkor AF-S 58 mm f/1.4G - Chromatic and spherical aberration


The maximum value of 0.05–0.06% means its level is low and won’t be bothersome in real life photos.

Nikon Nikkor AF-S 58 mm f/1.4G - Chromatic and spherical aberration



Spherical aberration

The spherical aberration is not corrected in a proper way and the appearance of circles, created by defocusing light points, is the proof. The circle you get in front of the focus is clearly less bright on the edges than the circle behind the focus.

Nikon Nikkor AF-S 58 mm f/1.4G - Chromatic and spherical aberration


The „focus shift” effect can’t be noticed in the first drawing of this chapter but, due to low sharpness, it would be difficult to see anything there. The “focus shift” becomes clearly visible in MTFs measurements, though. The position of the distance scale where which you can get the highest MTF50 values by f/1.4 aperture is not the same as the position at which you get the best results on stopping down.