Excerpt: I've had this lens since it was introduced. Have used it on Konica-Minolta 7D, Sony A700, and Sony A99V. It was excellent lens on both 7D and A700 but have noticed considerable back focus on A99 @ F2.8/75mm. It gets progressively sharper as F stop larger (4.0-8.0). At 8.0 lens is really sharp.
Excerpt: This lens would be good for a travel lens on a full frame camera, but I would not recommend it for professional use unless you are absolutely, positively certain that your copy works at all focal lengths. I've had two copies of this lens, and I've wound up reselling both of them.
Excerpt: Had high hopes for this lens but I thought the zoom took a lot of effort to reach 75mm. I have used the Canon 18-55mm 2.8 (rented) and the Canon 18-135 and am able to reach the entire zoom range with one twist were as with this lens I had to twist a few times (it seems). Plus it was stiff.
Pros: Durable, Fast / accurate auto-focus, Lightweight
Excerpt: Lens started out great and still is but all of a sudden it's gotten real hard to zoom. It's so hard I initially thought it was stuck . This makes it real hard to use during events where things happen quickly.
Excerpt: I read all of the reviews on here and other reviews on the web, so I thought I would finally make a decision and give this lens a try. I am wondering if I was expecting too much from the lens because when I first pulled it from the box and did some test shots (low light). I was not at all impressed.
Excerpt: Purchased as my main lens with T2i. Image quality has generally been very good, with the exception of wide apertures. Very soft at 2.8, or focus is slightly off and it shows with the shallow DOF. At f4 and above, very sharp across all image (cropped frame). Build is solid.
Pros: Consistent Output, Nice Bokeh, Strong Construction