Sigma started rolling out its I-series prime lenses at the tail end of 2020. From the company’s Contemporary stable, they’re designed to be premium primes but with a compact and lightweight build. They also have a sturdy all-metal construction, that typically extends to the barrel, mounting plate and hood, while also coming with both plastic and magnetic metal front caps. As I write this review in the Spring of 2025, there are nine I-series lenses in total, which are currently getting a cosmetic refresh. The Sony E-mount versions are to get an updated black finish, while the Leica L-mount editions are to be made in silver as well as black. I’ve already been impressed when reviewing the 17mm F4 DG DN | C, 20mm F2 DG DN | C, 35mm F2 DG DN | C, 50mm F2 DG DN | C and 65mm F2 DG DN | C lenses in the range. I think they’re some of the best lenses for Sony and best L-mount lenses for full-frame mirrorless cameras on the market, in terms of price, performance and compactness. Let’s see how this 24mm prime stacks up against its siblings.
