Viltrox AF 75 mm f/1.2
5. Chromatic and spherical aberration
Chromatic aberration
It is not easy to guarantee images completely free of longitudinal chromatic aberration with f/1.2 aperture; still the complex construction of the tested Viltrox, full of special elements, managed this task really fine. Even at the maximum relative aperture out-of-focus images are practically devoid of any unwanted colouring. |
Now let's check how the tested lens deals with lateral chromatic aberration – an appropriate graph can be seen below.
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As you see, this aberration practically doesn't depend on aperture values, always keeping a level of less than 0.02%. At the same time you have to mention the fact that it is a very low value so lateral aberration won't bother you at all. The Viltrox once again deserves to be praised.
| Fujifilm X-T2, RAW, f/1.2 | Fujifilm X-T2, RAW, f/11.0 |
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Spherical aberration
In first photos of this chapter you can notice a very delicate focus shift. When you move from f/1.2 to f/1.8 the depth of field slightly shifts towards bigger distances but, fortunately, this effect is not especially pronounced.Defocused circles of light don't provide any reasons to worry for a change. The ones reached before and behind the focus look very much alike and they are really nice, without any distinct local extreme points.
| Fujifilm X-T2, f/1.2, before | Fujifilm X-T2, f/1.2, after |
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