Good: The sharpness itself is really impressive, at least in the center. With strong Fade it is quite capable even at the edges, although not konkurrenzvernichtend. But measured by the price / performance ratio is absolutely okay and fine. The contrast I also liked good, overall so well have a lens for fun.
Bad: There is a certain amount of lenses, in which the adjustment of the focus is improperly installed (everything manually!). In order for the distance information of the lens does not match reality. One can in low light (storm photograph!) Does not focus to infinity reliable, because the representation of distance information almost like working at dice. Multiple series of measurements carried out showed that my lens is not in the infinity mark but between 2m - 3m focused most sharply. So I can not do anything. After focusing with the eye, is difficult at this focal length in an infinite area, you need in compelling the magnifying display of a camera. Through the viewfinder the ME is almost impossible to accomplish, since very small.
Exemplary I found that photo Walser (importer for Walimex products in Germany) offered that to send in lens and to test and replace if necessary. However, it did so, as if you had never heard of this error and something that I can not believe, because the net is full of information to do so. I thought that was incredible and made me angry.
Fact: The lens is high for this price region surprisingly good (especially as a lightning deal to have regularly!)! The field of view is at 14mm on full frame of course a highlight and the associated limitations are good for figures. If you can live with the problem of incorrectly assembled focus ring or is not affected, making this certainly nothing wrong.
I admit, in effect, three stars, because I have been jeopardized my glass think that such a thing despite a low price should not be. I'd give three and a half stars if that were possible, rounded up to the fourth star but lacks a tiny piece of conviction.