Nikon Nikkor Z 180-600 mm f/5.6-6.3 VR
5. Chromatic and spherical aberration
Chromatic aberration
The optical construction of the tested Nikkor is complex, with as many as six elements made of low dispersion ED glass. This fact makes us think the lens might deal with correction of longitudinal chromatic aberration very well. The photos below show that it is indeed the case. No matter what focal length you employ, the out-of-focus areas are free of any significant colouring, no matter whether they are closer or further away. |
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Now let's check how the tested lens deals with correction of lateral chromatic aberration – graphs below show the performance depending on focal length and aperture values, respectively for the edges of the APS-C/DX sensor and the edges of full frame.
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At the shortest focal length you can observe the highest results as they reach a medium level. On the second place land the maximum focal length where you deal with low values. The middle of the range fares the best, with the results on the borderline of very low and low level.
What's interesting, the Sony 200-600 mm once again adopted a different approach – in its case the highest results, reaching medium values, we saw at the maximum focal length.
| Z7, RAW, 180 mm, f/16 | Z7, RAW, 400 mm, f/6.0 |
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Spherical aberration
First photos of this chapter don't show any 'focus shift' effect so spherical aberration cannot be that high. The appearance of out-of-focus circles of light we reached before and behind the focal point confirms that much as they look similar. What's more, this remark concerns both the 400 and the 600 mm focal length.
| Nikon Z7, 400 mm, f/6.0, before | Nikon Z7, 400 mm, f/6.0, after |
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| Nikon Z7, 600 mm, f/6.3, before | Nikon Z7, 600 mm, f/6.3, after |
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