I've bought the lens, since I do a lot of nature, -and animal photographs. I am very satisfied, nachden I have for several weeks in use. The autofocus reacts immediately and very quickly. The light intensity could be a bit better, but this can be compensated by adjusting the ISO range of the camera in manual. To take pictures freehand is not a problem by the image stabilizer. With the image quality I am very satisfied, even at 500mm makes more crisp photos. Only downside is the weight, with the many lenses as no surprise. I would buy the lens immediately.
