Amazing whale. Never seen anything like it. Distortions are absent as a class. The camera removes them programmatically. Very light and compact, fast and with fantastic detail for its price. Not fast aperture and for this reason does not blur the background, but when shooting at slightly closed apertures, it surpasses top full-frame lenses in sharpness, such as the first generation of zooms 24-70 2.8 Nikkor and Canon, subjective impression. In terms of speed, it is not much inferior to them, losing a little in focusing accuracy, which is inevitable because. this kit is not a fast lens. Added vignetting to all photos.