Conclusion: I purchased this lens to use with my 50D. I wanted a lens that had a good zoom range, which this lens has. However, the lens has issues which doesn't make it a good buy for the price Canon is asking.
Cons: Slow auto-focus, Poor build quality, auto focus mechanism jerky, not sharp, Poor Color Reproduction
Summary: Ordered hoping to have a nice travel lens, a sharp all-in-one. Two big complaints--build quality and muddy images. The first problem is the worst. My zoom barrel would just steadily extend to the max position even when walking slowly. Could not keep it in place.
Excerpt: I've used it for landscape photography, video, pretty much for anything between the range of 18 and 35mm on my 7d. The best thing about this lens is it's AF skills.. Pictures are always on focus. Focused, but not sharp. You get lots of distortion.. dark corners, etc...
Conclusion: This lens has been a big disappointment, very soft focus, loose front barrel, and after three months of use it is full of dust inside of the elements. I do realize that this is a kit lens; however it is the only one that has filled with dust and has that soft of focus.
Excerpt: Works great at distance, but i'm disappointed with close-up focusing. It states its capable of focusing down to 1.5', but many photos are not sharp even at 20-24" unless you crank the camera up to F10 or more.
Excerpt: This lens came as a kit lens for my 60D. I bought the camera to use for video recording but was very unsatisfied with the results of the video. In any indoor situation there's so much noise going on that the video is useless and doesn't come close to looking like 1080p quality.
Fair upgrade from the 18-55, but far from the best
13 February 2011
Conclusion: I've had this lens since it first came out and I'm not very impressed with it. Vignetting is horrible, as is the chromatic aberration. If you love dark corners in your photos, as well as a purple fringe around your subjects, this is the lens for you!