After the second attempt I got a perfect lens. In use on Canon EOS 5 Mark 2 and EOS M. Direct connection to the EOS Mark 5, and with adapter to the EOS M with telephoto effect. Test formats RAW and JPEG. The Focusierung done quickly, smoothly and relatively quietly with two cameras. Sharpness even at aperture 2.8. When Mark2 RAW significant vignetting is however, removed by, comes with the camera software Digital Photo Professional, or Photoshop when converting as well. For JPEG, the camera software intervenes and removes them. With the EOS M this does not occur because the camera with a smaller sensor (22.2 x 14.8 mm) works From Aperture 5.6, the problem occurs anyway no longer on. I am thrilled and can only recommend the lens. But I have a total of 3 attempts needed until I had a good specimen. Even with the good part now I do not know where this is or whether it is new. The package was not new with security. For me, coming at that price and the area of application, ultimately the good result to fruition. With the lens you have to employ a little also. There's a lot of application areas.
