Price Performance Top 4.5 stars

I use this lens on a Nikon 7000. The work AF sufficiently quickly and accurately. The features, the 7000 has an internal error correction, the visible errors keep very limited. The optics of the structure of the camera optics angepasst.Die the gauge of D 7000 but not overwhelmed. One can certainly spend a lot of money for the Ojektive, but whether it makes sense, everyone should decide for themselves. I bestze still the Nikon 50mm 1,8f and a Sigma 18-250 mm OS. In the area of ​​18mm the distortion at Sigma fall more on because the error correction of the camera does not work with third-party manufacturers. (Somehow logical because the interest should Nikon also have the error of Fremdobjetiven balance) I had the opportunity and the 17-70mm 2.8 -4,5f of Sigma test. Straight lines were oval. The Nikon makes surprisingly well for this price range. However, two criticisms are nevertheless noted. 1. Bajonetring only made of plastic and not sealed. (When it comes 50mm 1,8f but also different.)
2.If the initial light intensity You can already see the entry lens.
As always it thoroughly recommended. For me about 75%, the Sigma 20% and the rest of 50mm.
Conclusion: Decent always plan for acceptable price. Those who want more must also take a lot more money in the hand. Or just follow the general trend and change to the FX format, where clever optics at 800 begins and ends with a few thousand euros