I finally got a chance to use the 14-24 yesterday on a shoot.
It was for Liverpool University’s Material Discovery lab. Excellent place to shoot. Very clean, lots of white panels reflecting nice white light. I was using ISO 2000 for most of it and the shots are so clean. I was also amazed by the 14-24. Its incredibly sharp. The fact that its f/2.8 is amazing too. I could focus on one person with the rest of the lab out of focus.
Below is a 100% crop from the 14-24 at 24mm. Its insane.