The Sigma 18-50mm F2.8 DC DN Contemporary is the lens to buy after the kit lens. It covers the same range as most APS-C kit zooms, roughly 27-75mm in full-frame terms, and it does it at a constant f/2.8. That’s up to two stops more light than a typical f/3.5-5.6 kit zoom at the long end, in a lens that weighs only about 290 grams.

Sigma launched it in 2021 for Sony E-mount and L-Mount. Fujifilm X-mount followed in 2023, and Canon RF-mount in 2024 when Canon opened its APS-C mount to Sigma. That makes it one of the few lenses you can buy for nearly every APS-C system covered on this site.