Fast problem resolution par excellence

... But definitely not a travel lens. This is indeed promoted, but the thing is really hard to even just as a holiday now and to be nursed (all day!). But it has become my favorite lens, 2.8 aperture is simply unbeatable and the opportunity with just one lens 28 - cover 75 mm is the hammer. The price has been here the rash, I regret it in any way and it would not easily give up. The distortion at 28mm are on the sides, are normal, I did with other wide-angle lenses also. The sharpness is very good, the processing very valuable. I use it with a Canon EOS 650D and 700d and there are no problems. Absolute buy recommendation.