They say that it is super sharp from 1.4 . On my crop it is 2.2 on FF from 1.8. 1.4-1.6 are also working, but this is not the same. About sharpness, it is prohibitive, someone advised using a soft filter for a portrait, it even makes sense. Color, when I saw what could be after the regular plastic zoom on the crop, I just thought that it was filmed with another camera. In full frame, he really became a staffer, and he can be used as a traveler, and a portraitist, and for a landscape. Moreover, aSee full review