The Sigma 18-50mm f/2.8 DC DN | C (stands for Contemporary) is, first and foremost, Sigma’s debut lens for the Canon RF mount. Without going into all the politics and restrictions put on third-party lens companies, we’ve waited six years for the first RF Sigma lens, and the wait has been worth it – provided you’re an APS-C Canon EOS R mirrorless camera user.
That’s because the Sigma 18-50mm f/2.8 is specifically an RF-S lens. Which means that, while you can use it on full-frame EOS R cameras in crop mode, it has been designed for APS-C bodies like the Canon EOS R7, R10, R50 and R100.
With an equivalent focal length of 28-80mm, weather sealing and a constant f/2.8 aperture, this is essentially a standard trinity lens for Canon’s…