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Lens review

Canon EF 35 mm f/2 IS USM

20 February 2013
Szymon Starczewski

5. Chromatic and spherical aberration


Chromatic aberration

In the case of the Canon EF 35 mm f/2 IS USM the longitudinal chromatic aberration doesn’t cause any problems – it can be noticed clearly in these crops from photos shot by f/2.0 and f/2.8.

Canon EF 35 mm f/2 IS USM - Chromatic and spherical aberration


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The lateral chromatic aberration performance is very similar to that of the lens’s predecessor but the values are by about 0.01-0.02% lower. Here the tested device can be only praised because even the highest results (hovering near 0.08%) still should be considered low. On the other hand we can remind here the result of the Sigma A 35 mm f/1.4 DG HSM, tested by us not so long ago - its maximum values never exceeded 0.06%.

Canon EF 35 mm f/2 IS USM - Chromatic and spherical aberration

Canon EF 35 mm f/2 IS USM - Chromatic and spherical aberration


Spherical aberration

The spherical aberration is not corrected in a perfect way and you can notice it by looking at the photos below. The circle of light obtained after defocusing the point-like image of a diode looks different in front of the focus (lighter centre, darker edges) and behind the focus (definitely more even light spread).

Canon EF 35 mm f/2 IS USM - Chromatic and spherical aberration

Still the level of this aberration is not huge and it doesn’t make itself felt in a form of a ‘focus shift’ as the first photo, presented in this chapter, shows.