Excerpt: Reading a pervious review of this lens here dated 13 October 2013, I felt compelled to write my own review because that user has had a very similar experience to me. I am a real estate photographer and had previously been shooting with the Sigma 17-50mm F2.8 EX DC.
Pros: Solid performer, excellent autofocus, great for close up / detail shots
Excerpt: A great and versatile lens, good overall sharpness, quite consistent across the frame compared to competition. Some CA but not strongly visible in most circumstances. It's a bit bulky but to me that is the tradeoff necessary for a good wide angle zoom.
Excerpt: I can't add any unique insights about this lens. It is one of my favorites due to its color rendition and overall sharpness. I have found that clear skies look like I have used a polarizer, which of course would not be wise at its extreme wide angle range.
Excerpt: I like this lens very much. I bought it specifically, to take photos of vintage vehicles at outdoor shows. I attend quite a few and I would estimate in the years that I've owned it, I must have taken thousands of pictures with this lens.
Pros: sharpness throughout focal range, robust construction
Excerpt: I have tried this lens on both my kx and k5IIs. Initial thoughts are that it's not the tack sharp marvel that so many make it out to be. Don't get me wrong, it's a good lens, nice n wide for Landscapes and architecture.