The cult Canon EF 135 mm f2L USM in the frame centre was able to reach 43.2 lpmm at most. The Sigma A 135 mm f/1.8 DG HSM reached 44.1 lpmm on the edge of full frame, when wide open. Do I have to say anything more? Once again we award the Sigma our „Editor’s Choice of Lenstip.com” badge.
Solid and stylish casing,, Brilliant image quality in the frame centre,, Sensational image quality on the edge of APS-C sensor,, Sensational image quality on the edge of full frame,, Lack of spherical aberration problems,, Practically zero lateral chromatic aberration,, Imperceptible distortion,,...
Noticeable vignetting at the maximum relative aperture and on full frame,, A tad too high longitudinal chromatic aberration.