Excerpt: This lens is very sharp in the center and corners at all apertures except 3.5 where the corners seam a little softer.The only real defect I see is somewhat high CA distortion in the corners but since PS and Lightroom 5 have such good tools to take care of this it is no longer a big problem.The extra wide view on the crop sensor cameras is great.
Summary: The edges get a little distorted and since I'm only using a T3i it's not using it's full potential. Really wish I had a better camera body to use the full potential of this lens. The HSM is super sexy compared to my canon lenses. I highly recommend this lens for not just landscape photography but tight rooms and vehicles as well.
Excerpt: Most of my photography and videos are done in conjunction with magazine stories and books, and because most are about outdoors or environmental subjects I often find myself in very tight quarters. The Sigma 10-20 replaced a 12 mm prime lens and has been great for things like photographing a dove sitting on a nest inside a porch light fixture, three fishermen landing a salmon in the cramped cockpit of a 20-foot boat and bats inside a small cave, where I wanted to get as...
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Rugged, Strong Construction
Excerpt: I have been using lenses this wide since the Voigtlander 15mm f4.5 came out for rangefinder cameras in the mid-late 1990's.I have always liked fisheye and rectilinear super and ultra wide angle lenses. Lenses like this are very useful for shooting tight interiors in cars, boats, aircraft, and ships. And these are fantastic for showing a small room in one image.This is also a very dramatic lens to use in video.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Vignetting Well Controlle
Summary: Pros: Very versatile in and outdoors. fast lens. Good optics. Cons: Fairly heavy and clunky. Difficult to align mount marks quickly. Very large filter size. Overall: Great lens at a good price point. The cons are relatively minor compared to the pros and the quality of the images.
Summary: I got this lens because it was wide enough for landscapes and interior shots. I use it on a crop camera so I get about 15mm to 30mm equivalent. Color saturation is good, sharpness is acceptable. You can expect some serious distortion but at this focal length it's normal. Price is right so I can recommend this lens.
Excerpt: I've been using the sigma 10-20 f4-5.6 for years, and this is a solid improvement, for a modest bump in price. A bit heftier, but not overly so (I'm on tripod almost exclusively anyway). Sharp results, distortion (which isn't bad to begin with) fixes well in LR.