Excerpt: Since day one when I first bought a DSLR I wanted a fisheye lens. It was a little bit out of my budget due to the fact that it costed almost the same as my camera (Canon T3i). This lens is the best! I mean, you can take a mundane scenery, shoot it with the Sigma 10mm Fisheye Lens and it will end up looking AMAZING. I LOVE IT. It's been great for taking some shots of an airplane cockpit at night (very poor light) thanks to it's aperture of 2.8ƒ.
Pros: Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction
Summary: I bought this lens for a STEAL of a price through Amazon's Warehouse Deals. I've never bought anything used from them before, so I was a bit skeptical and I was worried that the condition of the lens might be bad. Was I wrong! This lens only cost me a fraction of a new lens... and the lens doesn't even look like it was EVER used! Amazon made it clear that the condition of the original Sigma box was awful and ripped open, which isn't a big deal to me.
Excerpt: This is a very well-made fisheye that gives great flexibility to the casual photographer at an affordable price. Whether going for a super-wide angle with a straight horizon or curved horizon for special effects, this lens won't let you down.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction
Excerpt: This is the first off-brand lens I've every bought for my Canon 7D. It is a great lens. I use it for landscapes and creative portraits. It takes a little getting use to, but a very sweet lens.
Pros: Consistent Output, Durable, Fast / accurate auto-focus, Lightweight
Excerpt: I bought this lens to use with my Canon 7D and it works wonderfully! There is a learning curve but it is a fast lens, a bit noisy but that doesn't bother me. The images are crisp and clear. I love it because you can use it as a wide angle lens or use different angles to get unique shots.
Pros: Easily Interchangeable, Fast / accurate auto-focus