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Lens review

Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH.

21 August 2017
Arkadiusz Olech

5. Chromatic and spherical aberration

Chromatic aberration

The owners of the Panaleica 8-18 mm don’t have to worry about the longitudinal chromatic aberration. Its very slight influence can be noticed at the maximum relative aperture but even there it remains insignificant. On stopping down the aperture the situation improves significantly.

Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Chromatic and spherical aberration

The combination of the ultra wide-angle of view and a good aperture fastness is always very demanding for optics specialists who strive to correct lateral chromatic aberration properly. A graph below shows how the tested Panaleica fares in this category.

Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Chromatic and spherical aberration


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You have to admit the performance is very good indeed. The highest level of the aberration can be observed in an area close to the maximum relative aperture where, at all focal lengths, it keeps to a level of 0.06-0.07%. These are values we consider to be low. What’s more, on stopping down the aperture the aberration level decreases, reaching near 0.04%. As you see, no matter what focal length or aperture you apply, the lateral chromatic aberration shouldn’t bother you in real life photos. A round of applause!

E-M5 II, RAW, 13 mm, f/3.5 E-M5 II, RAW, 18 mm, f/16.0
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Chromatic and spherical aberration Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Chromatic and spherical aberration


Spherical aberration

In first photos of this chapter you can clearly notice that the lens doesn’t have any ‘focus shift’ effect. Circles we got in front of and behind the focus weren’t perhaps completely identical but also they didn’t feature any noticeable differences. It all indicates lack of distinct spherical aberration correction problems.

Olympus E-M5 II, 18 mm, f/4.0, in front of Olympus E-M5 II, 18 mm, f/4.0, behind
Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Chromatic and spherical aberration Panasonic Leica DG Vario-Elmarit 8-18 mm f/2.8-4 ASPH. - Chromatic and spherical aberration