An advance, I am only ambitious amateur photographer. But what makes this glass on my EOS 70d is sensational. I had fears the advance of autofocus or no uncertain meets, the EOS 70 is supposed for lenses with a large maximum aperture and the central cross-type sensor to be sensitive. So unpacked immediately after receiving and going maschiert to make test images. This 2.5-year-old daughter nimble. Behold sharp ..... 100 images of 98 to 100%. I had nothing to readjust. The Focus sits on the point. I could not believe it. So the daughter put on the carousel, set AI Servo and Los geknippst. 25 pictures, 24 sharp to the point. Such good results I have conceded with none yet anderne lens. The resolution of my objectives is one of the most important purchasing decisions. Again, I'm able to fully enjoy where I can start the pixel count. At aperture 1.4 the full Schräfe does not already exist. From Aperture 1.8 are the results Hammer, at aperture 4 a stunner. As for the mechanics, I am very satisfied. Selbs Canon L lenses are not handled better, on the contrary, the feel, I find even better. As this focus ring running ..... a dream. A clear case, buy recommendation across the board!