I own this telephoto zoom Since June 2014 and am very satisfied. Both the image quality and processing. For the price you get a telephoto zoom lens which has no equal in its price, and focal length class. For the price-conscious nature photographers an indispensable objective that can be photographed at a distance, the preferred animals and birds without scaring them or to have inherently a high flight distance. I also like the additional tripod holder on which the lens can carry around with them well and you can quickly inserting it at that. The autofocus is on my Canon 70D quickly and accurately, certainly some practice is needed just raptors hold in flight, but after some practice this works wonderfully. What many complain about the lens, is the slight blur in Teleendbereich of 500mm at f 6.3, that is certainly true. So I try the Tele also auzuziehen only up to 450mm and all at f 9-11 or trying to work with short exposure times and one achieved by tack-sharp images. Otherwise, if you want more must pay more. I, as an amateur photographer would not buy the lens again and again and recommend it to anyone who is looking for a good, affordable telephoto zoom lens for wildlife photography. Visited me sometimes here: [...] MfG H.Heuermann
