Got myself this little lightweight lens for city breaks and the like. Have otherwise rather semi-pro equipment, focus wildlife photography, but since it was now on little luggage. Must honestly say I am very satisfied !!! Have it on a 7 D turn, that move with the possibility the focal point, which is, in my experience with Sigma lenses worth gold !! Most make good pictures, but often do not focus on 0 unfortunately. This is for me - 5 and then well in the field, preferably without Stabilizer with tripod !! Wherein the stabilizer also does a good job, but I'm just an old tripod users. Have me plus the magnifier lens Raynox 250 granted and am completely thrilled !! Have with little luggage from Super Macro to the Middle Tele everything !! here It is a pity that it does not go with the 1.7 x converter, that's it yet !! Otherwise I need in the city then the 10-20 and am using less than 3 kg and without backpacking ... Clearly, it is not a professional lens, for animal photos or sports pictures tend not suitable due to the beginning of aperture but in my opinion really good enough for macros, architecture, portraits - and for that, it is thought with me in the fall !! For the rest you need maintenance but the more expensive stuff, if you want great pictures !!