The delivered Zoom lens by Sigma covers a very large area and is highly compact, which means it is much shorter than the extreme focal length of 300 mm at first suggests. Surprised, I was of the quality of built-in motorized focusing mechanism, which quickly and quietly is always a sharp picture like a but much more expensive original lens. The macro range requires an unusually large distance to the object, but this is just a fun way to small animals without having to drive (beetles or butterflies), to reflect large and close. As with almost all of these products, the Far East accompanying description is indeed translated into an incredible number of languages, but the only required in the German room description contributes to the confusion rather than to educate, because the translation was carried out by a photographic laity. But with my own experience and curiosity brings you the product soon for satisfactory work.