I don’t know about you guys, but when Sigma announced the 24-105mm f/4 lens last year, I got very excited. The Canon 24-105mm f/4 was one of my favorite video lenses early on. It’s an extremely versatile focal length that, besides the slow f/4 constant aperture, was largely pretty usable in nearly any environment. Sadly, the lens was only good for video because it just wasn’t very sharp. That’s why Sigma’s attempt got me so jazzed. Based on prior experience with their Art line, I had high expectations for Sigma's new zoom lens.