Excerpt: I own the Canon 15-85 3.5-5.6 zoom, and purchased this as a faster alternative due to this having a constant 2.8 aperture. However, I found it a big soft wide open and needed to stop down to f4 to equal the quality (sharpness, contrast, and saturation) of the Canon wide open.
Excerpt: Seems well built and pics look good, but mine right out of the box made squeaking noise on AF. I'm returning the lense and debating whether I should give it another try with a replacement or look for something else.
Excerpt: Upgrading from a kit lense the picture quality was much better as it should be, but the quality of the lense felt cheaper. heavier from what I can assume is all the glass but the build quality of the actual lense body feels cheap.
Excerpt: This is my second sigma 17/50, and I am disappointed with the sharpness, the first one which I had problem with, the barrel getting loose was repaired and it did affected the sharpness, reason why I bought an other one, this new one is not any better??? I will trade for Canon lenses.
Excerpt: Nice lens, easy to use and sharp, but not much more than the Sigma 18-250 mm f/3.5-6.3 I already own and use on a Canon 60D. I bought if for the larger aperture anticipating better IQ but found that a Fujifilm X30 28-112 mm with an f/2-2.8 lens that I bought later for travel use handled the larger...