Excerpt: Clean design and relatively lightweight, this widey does the trick for handheld/mobile shots (video). Great for outdoor use, due to it being on the slow side, it racks to infinity with great ease.
Pros: Durable, Easily Interchangeable, Lightweight, Strong Construction
Excerpt: Didn't really need it but bought it because it was on sale. Wow! I love this lens! Took it to a shoot last weekend and I was pleasantly surprised. Performance, weight, sharpness - all fantastic. I'm very happy. Sigma is quickly becoming my lens of choice.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Lightweight
Excerpt: I bought this lens after reading its reviews. For the most part they are accurate. I used this lens on a Blackmagic Pocket Cinema Camera (BMPCC) with a Metabones Speedbooster EF adapter. Even with the Speedbooster's performance, the lens felt slow for low light shots.
Cons: Poor in Low Light, Tough To Attach, Weak Casing
Excerpt: Wide angle lenses are best suited for outdoor scenes, to spread out a valley view, a panorama, or to show city scapes from a distance. Since this only fits crop sensor Canons like my 7D, you are getting more like 17mm to start out with. Sharpness seems better at full range.
Sigma 10-20mm f/4-5.6 EX DC HSM review by larslentz
23 May 2015
Summary: This is a great wide angle lens for an APS-C camera. I've used it a lot in my photography of landscapes, and it is quite sharp with a nice ability to take 77mm filters. I use a polarizer on it even though it is a wide angle, and I have great results.
Cons: This is a great wide angle lens for an APS-C camera. I've used it a lot in my photography of landscapes, and it is quite sharp with a nice ability to take 77mm filters. I use a polarizer on it even though it is a wide angle, and I have great results. The corners are a bit soft at the minimum foca...
Excerpt: This lens is what i've wanted for more photography projects especially in real estate. I have been testing it out and looks like it's doing just what it should. I have not used the Canon version so I do not have a comparison but I get what I need out of it. Money well spent.
Pros: Consistent Output, Fast / accurate auto-focus