ACCEPTABLE lens with average business activity for beginners and photographers with low expectations!
It is relatively easy, easy to use and provides the focal length produces a wide range of applications.
For the advanced photographer or photographers with higher demands I do not recommend this lens more. It shows above-average strong vignetting, which extremely bothers me personally. Distortion I now could not watch as often described, so nothing could be equalized with good software. The vignetting but was a big problem.
Conclusion: Recommendation for beginners, occasional photographer, vacation photographers à la memory images claim. Not suitable for photographers with a higher calling.