1 Picking up the lens, which is simply necessary when traveling! What else is felt is the weight of the Sigma! Yes, the lens is very heavy, almost 1.2 kg! 2 then I have absolutely nothing to complain about! of super-wides is a slight fuzziness at the edges of the frame, then with Sigma at working apertures (F9-11) I didnβt notice it at all! The geometry of the Sigma is also all right, distortions in contrasting areas) are enough) the sun' always liked how the Nikkor 16-35 say that Sigma is better in this parameter, Work at limit values ββ(on an open aperture of F1.8) it became clear: a really working aperture of 1.8 with excellent sharpness across the entire field of the frame! F1.8 perhaps, Full text with photos here: