If you like soft images and lots of uncontrollable green sun flare in every image you need to get this lens!!!!
T. Schmidt "apple fan", Amazon
24 May 2015
Summary: I bought this with high hopes of using on my 5dmk3. I wanted a rectilinear lens that was wider than the 17mm tilt shift canon L series I had. This lens is soft for most of the frame. It also flares like crazy.
Excerpt: As the Canon 11-24 lens is too expensive to me, so, I choose this one as my wide angle lens. Now, I got 11-24 wide angle zoom lens, 24-70 standard zoom lens and a 70-200 telephoto zoom lens. The best part of this lens is the price, it is relatively cheap among the wide zoom lens.
Excerpt: THE GOOD: - Phenomenally large view for landscapes. - Fast auto-focus. THE BAD: - Autofocus does NOT work on the Nikon D810. - No weather sealing. All together, this is a "MUST HAVE" lens when it comes to gigantic buildings, large places and other landscape photography.
Summary: Used on 5d mk3, Very sharp above f8. Has significant vignetting, just over expose a bit, and use the lens correction in post and it's not noticeable. At 12mm, there is pretty bad distortion in the corners that isn't easily corrected in some scenes, but if you're conscious of it you can adjust your...
Excerpt: Used this sigma 12-24 lens with my 5D mark3 without any problem, quality came out great. I used this for my landscape or interior application photos and I knew it's an f4.5 lens so using a tripod is necessary at low light space. Compare with canon 11-24 f4, this is much cheaper.
Excerpt: I've been a professional photographer for about 14 years now and do a lot of wedding/portraiture but have been getting more requests for real estate work and landscape art. A great telephoto, wide lens was definitely necessary and I've been trying few different ones throughout the years.