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Lens review

Fujifilm Fujinon XF 18 mm f/1.4 R LM WR

22 June 2021
Maciej Latałło

5. Chromatic and spherical aberration

Chromatic aberration

As you can notice in photos below, one low-dispersion ED glass element is enough to ensure a proper correction of longitudinal chromatic aberration. It's easy to put inside a lens as many exotic glass elements as you can think of; it's not so easy to design the whole system so it performs in an efficient way. Still, Fujifilm undoubtedly managed to do that.

Fujifilm Fujinon XF 18 mm f/1.4 R LM WR - Chromatic and spherical aberration


Now let's check the correction of lateral chromatic aberration.

Fujifilm Fujinon XF 18 mm f/1.4 R LM WR - Chromatic and spherical aberration


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In this area the results are excellent as well. The aberration level never exceeds 0.03% so it remains very low, practically imperceptible in real life photos. A round of applause!

Fujifilm X-T2, RAW, f/1.4 Fujifilm X-T2, RAW, f/11.0
Fujifilm Fujinon XF 18 mm f/1.4 R LM WR - Chromatic and spherical aberration Fujifilm Fujinon XF 18 mm f/1.4 R LM WR - Chromatic and spherical aberration

Spherical aberration

In first photos of this chapter there are no traces of focus shift. When it comes to defocused circles of light there is also no reasons to worry – they are similar to each other and a bit brighter edge of the circle reached after the focus is the only difference that sticks out. It makes us think that the tested lens doesn't experience any more serious problems connected to correction of spherical aberration.

Fujifilm X-T2, f/1.4, before Fujifilm X-T2, f/1.4, after
Fujifilm Fujinon XF 18 mm f/1.4 R LM WR - Chromatic and spherical aberration Fujifilm Fujinon XF 18 mm f/1.4 R LM WR - Chromatic and spherical aberration