Summary: Amazing picture great build. I used it with my T2i but now have upgraded to a 70D... big jump I know. I can't wait to take it out this weekend and take some quality photos! Be wary that if you plan on taking shots with built-in flash completely wide you will often get a shadow from the hood.
Excerpt: A question was sent to me about using this lens on a Nikon D-90...I have a Nikon D-80 & 7000, and love this lens for both. I've used it on landscapes & cathedrals and while the edges are curved, simply crop that part out. I do not find it has a fisheye effect. I have only used it outside in sunshine & cloudy skies so I can't review it for indoors. I would recommend it if you are looking for an ultra-wide lens for your bag.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Rugged, Strong Construction
Summary: My favorite lens of all time. I use this on my Canon 60D APS-C and it is my go to lens for room interiors, sweeping landscapes, etc. You will be amazed at just how WIDE this lens really is! The world is your oyster when using this lens, because nothing will be out of reach when you are composing your shots! Focusing distance is only a couple of inches to infinity, so your options are endless. My only negative about this lens is the fact that I can't use filters.
This is a excellent wide angle lens It interfaces perfectly with my digital ...
Ace Drummond, Amazon
12 July 2014
Summary: This is a excellent wide angle lens It interfaces perfectly with my digital camera. The only thing you must keep in mind is that super-wide lenses have inherent edge distortion. If it is used in close, to photograph a group of people, those on the edges will seem twice as wide.
Wider than wide and as good or better than 10-20mm
Shane O. Laake "camera nerd", Amazon
24 June 2014
Summary: I never knew how much I'd like wide angles until I bought the original Sigma 10-20mm f/4-5.6 lens. It was sharp (on a D70), and it opened my eyes to a whole new perspective. Way different than the 18mm I was used to thinking was wide. That lens beget an "upgrade" to the 10-20mm f/3.5 lens (it offered some improvements). I used that chubby ens quite a bit on my D90, and I never wanted more in the 10-20mm realm, but I found myself using my 8mm fisheye more and more.