LensTip.com

Lens review

Irix 30 mm f/1.4

16 March 2022
Maciej Latałło

5. Chromatic and spherical aberration

Chromatic aberration

Photos below show clearly that three low-dispersion elements inside this lens perform as they should. Colouring of out-of-focus images is negligible even at the maximum relative aperture, meaning that longitudinal chromatic aberration is corrected properly well.

Irix 30 mm f/1.4 - Chromatic and spherical aberration

Irix 30 mm f/1.4 - Chromatic and spherical aberration


We also don't have any reservations concerning correction of lateral chromatic aberration – most of results in our test were on very low or low levels, ranging from 0.03 to 0.05%.


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Canon 5D III, RAW, f/2.0 Canon 5D III, RAW, f/11.0
Irix 30 mm f/1.4 - Chromatic and spherical aberration Irix 30 mm f/1.4 - Chromatic and spherical aberration


Spherical aberration

First photos of this chapter don't show any focus shift effects and circles we got before and behind the focus are quite similar. It means the Irix 30 mm f/1.4 doesn't experience any significant problems connected to spherical aberration.

Canon 5D III, f/1.4, before Canon 5D III, f/1.4, after
Irix 30 mm f/1.4 - Chromatic and spherical aberration Irix 30 mm f/1.4 - Chromatic and spherical aberration