Excerpt: The reviews on this lens were not good 2 years ago as was the case with the 18 -135 also.It think it is asking to much of a lens to expect much in performance with such a wide range of barrel lengths. ( Nikon does better in this area ) I finally bought the Canon 7D pro-series crop & this lens was available as a kit for an additional $.The 7D is an outstanding camera & Canon should be ashamed of themselves for incl.
Excerpt: It's amazing that these still sell well. This lens was designed as a mid-tier all-around zoom for 35mm film cameras. That market tier no longer exists with digital, now it's an odd duck out. On a cropped sensor dslr like 7D, it's a 45-215 lens lacking any wide angle capability what so ever with very pedestrian apertures throughout the range. I can see why some people are happy with it for national parks, but it's not an all-around lens by any definition.
Conclusion: When I purchased my EOS 7D, I chose a package which contained the EF 28-135 IS USM lens because I figured it would be better than the EF-S option and because I wanted to be able to use it when I upgrade to a full-frame camera. Fortunately, it wasn't too costly a mistake. The good: The image stablization system works very well. Focus speed, as a result of the USM, is also fast and reliably accurate. The large-ish rubber zooming grip is also quite comfortable to use.
Excerpt: I bought this lens to match up with my Panasonic AC130 for 2 camera shoots. I can match it fine but the images are not sharp. I "punched in" with the magnify button endless amounts of time on my 6D and seemed to have it in focus, but it never really was even at f9. I guess that is why they call it a kit lens. I am disappointed and plan on sending it back before the 30 days is up and get the Tamron 24-70 2.8 vc.
Conclusion: Very poor quality in the range between 80 and 135mm, even for regular printouts. Very sensitive to sand and dust, barrel shaky. 24-105 L is so much better. If anyone considers buying a DSLR for reasons of image quality (over choosing a analogue or bridge camera), this lens is inadequate for the purpose. Sold mine after two years of disappointments on my first DSLR, the 20D.
Excerpt: This was the kit lens with my 50D. I hated using this lens. While its properly F2.5 at 28mm, by the time you extend it to 35mm or so, its F5.6. Way too slow for 99% of my shooting. Available light shooting was acceptable only on bright sunny days, which is not when you get flattering light for your subjects. On a crop sensor body, 28mm is not wide angle, its very close to the "normal" 50mm on a full frame camera. This is too long and too slow (aperture) for my tastes.
Excerpt: Have to use this lens with caution. It does not produce results like the "L" series lenses. It has a wonderful range of focal lenths, but it is a little bit of a compromise if you want sharp, sharp images. Great running around lens, but if you are serious about photography, and image quality. Look to spend a bit more money.