Of course, one must be clear about what you as actually acquires. The tube has around 2 kg and with such a large zoom range, it is true, of course, to make regarding brightness and image quality compromise. But short on specific items:
Aperture: 1.2 or 70-200 1: Of course, a fixed focal length of 1 is 2.8 better, but also in low light conditions (I held my son's Confirmation in the Church this past weekend) sits the focus, and the images are well balanced color. Here, of course, is the 5D III very useful, as well as the image stabilizer which allows a little slower shutter speeds .. Also, the Bokeh is especially pronounced at the telephoto end of a zoom lens in response by the circular aperture. The only marginal gripe: There are high-contrast optics, but if necessary you can indeed help with Photoshop.
Optical performance: I am as I said no line counter, in my observation, the images over the entire focal length range sufficiently sharp to the Ecken.Polsterverzerrungen I can not determine the best of intentions, but I have photographed no test charts.
Autofocus: At the 5D III quickly and accurately, at the telephoto end (at 300 mm) sometimes significantly slower. Lack contrast you have to occasionally help, so bring the focus ring in the vicinity of the focus, the rest then creates the camera. Here the focus limiter is useful, but I personally do not use it.
Image Stabilization: I have "blurred" even in low light conditions not a single image. So does perfectly his service.
Vignette: In full-frame lens vignetting very strong, already in the viewfinder, the corners are very strong darkened. Since the optics but one of the most in the 5D III registered lenses, the image processor converts the hundred per cent out. In no image vignetting is detectable.
Color error: The chromatic aberrations are eliminated entirely from the 5D III.
Processing: What can you say to a Canon L lens. Since there is absolutely nothing to complain about.
Handling: Positive immediately comes to mind on the supplied tripod collar. In contrast to the white "Standard" ring allows the clamp open side, and to fix camera + Obejktiv from the clip without having to remove the lens from the camera. Likewise, you can use it again and fix it. For me, very convenient. That the lens has its weight, I have already mentioned, but nothing else can be expected from a full-frame compatible L-optics. About the push-pull zoom mechanism I have to probably no longer speak: Some like it, others do not. The fact is that you "at the point" is extremely fast, I appreciate that very much. The disadvantages are also clear: if you put on the locking ring, it pushes the camera against glasses and nose, it hurts really, allowed to him (like me) to "smooth", crawls apart the optics when the camera at the hip dangles , All in all, I guess, but the push-pull zoom mechanism.
Conclusion: Although the look has under his belt already 10 years, it is for me what I have been looking for: the classic "Always top-tube", with which one always has the correct focal length in hand especially on vacation. Maybe I'll take even a fish eye, and that's it. Of course, one drags with the 5D III and the battery grip approximately 3.7 kg around, but with shoulder strap that is for me no Problem.Es worth it when you see the pictures afterwards. Quite cheap, the pipe is, of course not, but for me outweighs the benefits. I want in any case to issue a strong buy recommendation, the optics deserves 5 stars!
