Summary: You do get what you pay for here. Sharp, accurate and fast focus. What I'm most impressed with compared to other lenses is its excellent behavior outdoors under bright sun light. No flare and excellent color reproduction even with the sun in the picture.
Summary: This lens works great!! Photoshop lens distortion corrections work perfectly, and it gathers a lot of light. I took Milky Way photos on a moonless night, and got enough light on the mountainside to see it too.
Summary: I like the fact that it records the subject with the milieu, emphasizing the foreground. Also, on time-lapse, it's great for recording storm cloud development. The large maximum aperture makes it especially good for interiors, though it's a challenge to control the fisheye distortion. Well-built and sharp, it's a very nice lens, though not extremely versatile (as expected).
Summary: First of all, to the previous reviewer who called this a "rubbish lens," because it has "the most serious distortion I have ever come across,": did you really just pay hundreds of dollars for a fisheye lens without knowing what a fisheye lens is? Seriously? In case anyone else is confused, this lens is nothing like a normal lens.
Summary: I read a lot of reviews and ended up settling on a new copy of this lens instead of buying a used but mint condition Canon 15mm fisheye that was selling locally for about $45 more. Very glad I did. This is now my second Sigma lens (also own the 35mm 1.4) and I'm really digging their offerings and look forward to more of their "Art" series lenses they have in the works. First off, image quality is quite sharp and has great color rendition.
Summary: so i'm not really a fan of fisheye lenses, in fact i had no desire whatsoever to purchase one, my wife on the other hand loved the look of fisheye she doesnt really shoot but she does love looking at pictures, so anyways our daughter's wedding was coming up and although they had a pro there, my wife still wanted me to bring a camera to shoot some guests and some decorations.
Summary: This is a great fisheye lens for fullframe cameras. I use mine on my Nikon D600 and the shots are amazing. Color reproduction is good, and the lens is sharp. Its a sturdy-feeling lens, and it does what it does, specialty fisheye shots, just right. Sure, these days you can do it in postprocessing too, but its fun to use, and the photos DO look better than what you get out of photoshop. Recommended.
Excellent lens, great price and five-star service from Amazon!
Mario Fazekas, Amazon
1 April 2013
Summary: This is a superb lens - small, light and sharp. I had the Nikon fisheye lens but sold it as the Sigma has a closer minimum focusing distance. The Amazon price, including courier and VAT, was US$220,00 less than if I had purchased the lens locally! I needed the lens in a hurry for a Kruger safari and the lens was ordered on the Thursday and arrived on the Monday, just four days - what great service!