Excerpt: I used this lens on a trip to Boston, it was great. Sharp, easy to focus,I am very pleased with the performance of this len. I was wanting one for a long time and finally broke down & bought it..
Summary: I was a bit worried when I saw a two star, would not recommend review but having done some web research decided to buy. Very pleased with the sharp results on my D800 and thats only using hand held. Very wide so ideal landscape. I figured I wouldn't miss the 2.8 of the Nikon 14-24 as I have no intention of using the lens other than in bright conditions or flash.Shots can require a bit of PP for best results.
Summary: When I see the quality of the images this lens is capable of producing, I sometimes wonder why one would pay a great deal more for a Canon lens. A superb lens with pin sharp focusing. Well worth the money.
Summary: Currently being used with a Canon 450D so the lens isn't being fully utilised at present, but still wide enough to allow for good experimental shots. In general I am pleased with how close I am now able to get to even very large objects or buildings and the quality of photograph composition this allows. I am not sure though whether it is the lens or my camera's autofocus that are at fault - many shots have to be taken a couple of times to ensure correct focus.
Summary: As the Sigma leaflet says - filters are not recommended for this lens, although the extension cap is fitted for a 82mm filter. Any filter gives heavy vignetting at all focal lengths except 24mm, because one has to have the extender cap on, so it's impractical. Trying garden shots I held a Cokin P 3-stop filter in front, just touching the lens hood top and bottom, and it worked. There is just enough dark area to cover the view.
Summary: I'm loving this lens, although I admit my uses for it have been limited thus far. A few good shots for sponsors and the local press, and a few very encouraging portrait style images of dramatic skies. I've not tried it for anything creative yet - proper landscapes, long exposures at the sky, close ups with expansive backgrounds - but I bought this for the ultra wide angle of the lens and I am not disappointed in the slightest.
Summary: Having read many mixed reviews I took a chance on this lens and have taken about 500 shots so far using a Canon 5D2 (full frame sensor). Its not an inexpensive lens but compared with some Canon L glass its also not that expensive for the quality it produces. 12mm is massively wide, possibly too wide for some landscape shots as it distorts noticeably towards the left and right edges but for architecture it is simply superb with perfectly straight lines giving beautiful...
Summary: Ultra wide angle lens for Full Frame DSLR users. Great results and a competitive price means this is an attractive purchase. Yes the aperture range means this is 'slower' than some other zooms and prime lenses in this range, but I'm normally on a tripod looking for great depth of field or hand holding with flash.What's it like to live with? Results have been great, my clients have been buying the images! Clients have commented on the distingive look of the front element.
Pros: Durable, Great Picture Quality, Price, Sharp images, Wide angle of view