Summary: This lens is gorgeous. It's my second prime L lens. My first was the 85 1.2 and it sold me on the idea of using primes almost exclusively. So I decided to get the widest prime I would use regularly. I shoot mainly portraits and weddings. I really love the 24mm focal length. Not TOO wide, but it's wide enough for shooting in smaller rooms or getting a pretty wide landscape shot. I have the 24-105 f4 and I found myself shooting a lot at 24mm and really loving it.
Summary: It's as well built and sharp as any Canon L lens; all I wanted to throw in here is the focusing performance in low light. It's great! Maybe not quite as fast as my 70-200, but then, I'm shooting at f/1.4 so that's a big challenge for any lens. I'd say it's a little quicker and more accurate than my Sigma 35 and 85, and right up there with the Canon f/1.2 50m. Admittedly, it's not a lens for all purposes but when you need to go wide in a dark stage, this is the tool.
Summary: Great addition to my bag. I use it for unique angles at weddong ceremonies, those difficultly small hotel rooms for getting ready shots, compelling shots during portraits, and real estate/architectural photography. Do not limit yourself with this lens. It is more versital than many people think.
Very sharp, low-light lens. Good on both crop and full-frame cameras
24 September 2014
Summary: This is a good lens but it's not perfect. I first used this with my EOS 7D and it really shines on that crop frame body. So sharp, so clean, so true. Sometimes in sunny outdoor shots on my EOS 5D MkIII I get some chromatic aberration. It's easily corrected in post, but it's still annoying. It's technically even sharper on the MkIII, in the center. Detail is very high and clean there. Low-light ability is great, and it's got good sharpness all around. It is a good lens.