Justin has completed our review of the Sigma 24-105mm f/4 OS. As expected, the lens is a real winner when compered to the Canon equivalent and is priced exceptionally well. Sigma's quality, warranty and pricing are going to ensure that they're worth your consideration at certain focal lengths.
“My opening line said it all: Sigma is absolutely killing it with these new lenses. They perform, look and are priced better than the Canon equivalents. …….. Their attention to industrial design and optics makes me think more of the even higher-end Zeiss lenses than it does a Canon, which is smart, because the cost difference between a Zeiss lens and Sigma is even greater, creating an even more compelling price gap in Sigma’s favour.”