The sharpness of the lens initially corresponded fully to my expectations. Also WW distortion and vignetting are within an acceptable range for me.
Of particular note is for me the OS which, unlike many Canon lenses, permanent works and is not only switched on when pressing the AF.
The AF is very quiet, fast and accurate.
Also included with the Gegenlichblende the lens and not partly as with many Canon lenses. Does not have to be purchased to understand high prices, it should be mentioned positively.
The "feel" of the housing corresponds approximately to a Canon lens in this performance class.
To this extent, I can fully confirm the good reviews of this lens!
Unfortunately, the first quality problems turned out already after half a year.
First, much of the AF completely. The study conducted on warranty repair took about 3 weeks.
After much to me that was "off center" the lens, dH it was blurred in the upper left of the screen.
The complaint took another 3 weeks.
About a year later the OS failed his service. He struggled only and shaking so hard that could be made no more pictures. (Conveniently, on a trip ...)
The warranty repair took time 4 weeks.
The following year, I took the lens on another trip, for which I had bought it, too. This time Obkektiv settled because although off but not subsequently Fade.
Repair time, this time only 1 1/2 weeks.
After about three years of use, the image quality was noticeably. Compared to the images that were taken with the lens when it was still new, the Bildschäfe has decreased visibly. In addition, the barrel of the zoom is very become "rickety" and it can only be higher effort and extend.
Approximately 4 weeks after the expiration of the warranty period much again the OS in the same way as in the first repair of.
A goodwill has been rejected by Sigma. The repair cost would exceed by about 170, - the value of the lens clear.
Conclusion:
A beautiful lens when it is new and if one little photographed it.
Due to the massive quality problems and the high wear on my copy, but I can not recommend it!
