Canon EF 300 mm f/2.8 L IS II USM
5. Chromatic and spherical aberration
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Exactly the same thing can be said about the lateral chromatic aberration. Both on the APS-C sensor and on full frame it is situated near 0.04% or a bit lower so it remains negligible.
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The correction of the spherical aberration should be described only in superlatives as well. Defocused images of a diode, caught in the front the focal plane and behind it, are very much the same – almost similarly homogeneous, without any noticeable rings, borders or interferences. Only in the image behind the focal plane you can notice a bit lighter ring but such an effect is so slight that it can’t change our positive assessment.
