I have long wondered whether I should buy this lens. Any offering new for 600, - I then slammed shut. Used is the appearance at the 6D and also for infrared in a converted 5D MII. Until now, the 24-105 L the "Always top", which has also proved to be solid travel lens. If one is not traveling alone, you do not have often the quiet and time to change the look, as covers the 24-105 L a lot from. I once had the Sigma 24-105 / 4.0 Art and the Tamron 24-70 / 2.8 VC compared to the 24-105 L (was adjusted from Canon again and centered) tested; generally disappointing: both are indeed at 24 mm more at the edges and corners, with 50mm, 70mm and 105mm but was actually the old Canon 24-105 L front or to the edge was simply sharper than the Sigma or Tamron. Both Sigma and the Tamron were also specially adjusted again and centered been, it should not therefore have been situated. But now for the 24-70 / 4 IS: processing is L used well, the AF fast, quiet and accurate, the IS quietly and well. Since there is nothing to complain about. Now the probably most important; the figure line: The lens delivers at all focal lengths constant up to the corners sharp contrast images; even at maximum aperture. Fade brings little improvement since. It certainly is not as sharp and brilliant as the 100 IS Macro or the 70-200 / 2.8 L IS II, but it is quite sharp. The sharpness waste described repeatedly in part at 50 mm I could not safely conclude. Compared to the 24-105 L is sharper at 24mm straight at the corners and edges, but has -just like the aforementioned Sigma and Tamron slightly less wide angle. Otherwise, the focus, at least with my 24-105L, comparable, however, objects appear in the same panel in front of the focal plane with the 24-70 sharper and more contoured, fewer CA's, for a total of image impression on the 24-70 IS is simply better. Topic Focus Shift: Yes, there is. At 70 mm at close range below about 1 m, the focal plane is shot photo slightly behind the actual focused plane; whether focused by normal AF or via LiveView. In addition, the sharpness is so underwhelming. How can technically explain, I do not know unfortunately. If you turn now but the lens in the macro position, the focus is right again; also takes the edge too much and it can be Macros in pretty good quality make; certainly much better than the Macro setting with most other zoom lenses. Presumably, this focus shift is a technical "concession" for this pretty well-functioning Macro setting. You should know, remember and then you can with this lens also make excellent close-ups without to change the lens. My appearance by the way the "88xx" as the last digits of the serial number, so should a lens from recent production to be. Ultimately, therefore, I give 5 stars considering the low price; 800, - will be more and I think these are simply too expensive, also this lens so as kit lens sold and is therefore safe produced in large quantities. The lack of 35 mm in the "long" range compared to 24-105 L equal to it. By the consistently good image performance especially in wide-angle and Macro good qualities, moreover, it is also more compact There also seems to be well suited for infrared photography.
