Panasonic Leica DG Vario-Summilux 10-25 mm f/1.7 ASPH
5. Chromatic and spherical aberration
Chromatic aberration
Photos below show clearly that the tested lens doesn't have any problems with longitudinal chromatic aberration. It's worth noticing that in that category the standards were set very high because you deal with both good aperture fastness and a wide range of angles of view. |
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The graph below allows you to assess how the Panaleica 10-25 mm deals with lateral chromatic aberration.
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Images practically free of the aberration you get just in the middle of the focal range; at both ends of the spectrum the aberration level is the highest. At the maximum focal length it depends weakly on aperture values, staying all the time near 0.09-0.10%. Such results we consider to be on the borderline between low and average level. In the case of the widest angle of view chromatic aberration is low only for the closest area of the maximum relative aperture. From f/2.8 onwards it starts approaching medium values.
| E-M5 II, RAW, 17 mm, f/1.7 | E-M5 II, RAW, 25 mm, f/1.7 |
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Spherical aberration
In the first photos of this chapter you can see that the lens doesn't have any 'focus shift' effect. Circles we got before and after the focus aren't identical, but they don't feature any distinct differences either. All of this make us say there are no significant problems connected to spherical aberration correction.
| Olympus E-M5 II, 25 mm, f/1.7, in front of | Olympus E-M5 II, 25 mm, f/1.7, behind |
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