I am really loving the Sigma 24mm f/1.4 lens. Wasn't sure what I'd really use it for, and expected to be taking more pictures outside with it, but it's fun to use indoors and has a nice journalistic quality. Also for some reason I'm not the focus freak I am with the Canon 50mm f/1.4 even though you can still crop in pretty close. Is it a sharper lens? Not sure but some of these are really crisp on zooming in.