Fujifilm Fujinon XF 23 mm f/1.4 R LM WR
5. Chromatic and spherical aberration
Chromatic aberration
The optical construction of the Fujinon features as many as three low dispersion elements so we didn't expect any problems when it comes to chromatic aberration correction. It happens we were right – it's enough to glace at photos below and you know that longitudinal chromatic aberration is low even at the maximum relative aperture. Compared to the performance of the predecessor, in this category you can observe a notable improvement. |
Now let's check lateral chromatic aberration – an appropriate graph is shown below.
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At all apertures you deal with results just over 0.04% so their level is very low. At the same time these are values a tad lower than the values of its predecessor. We think this aberration won't be visible in real life photos.
It's also worth mentioning the fact that the Fujinon fares a tad better than the Viltrox AF 23 mm f/1.4 XF when it comes to correction of both types of chromatic aberration.
| Fujifilm X-T2, RAW, f/1.4 | Fujifilm X-T2, RAW, f/2.8 |
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Spherical aberration
First photos of this chapter show a very slight focus shift towards greater distances on stopping down the lens by 1 EV. It isn't anything distinct but it might indicate that spherical aberration is not corrected perfectly well.It is confirmed by the appearance of out-of-focus circles of light we got before and behind the focal point: in one case you see soft edges of the circle, in the other – a tad brighter rim.
| Fujifilm X-T2, f/1.4, before | Fujifilm X-T2, f/1.4, after |
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