During yesterday’s announcements for the Sigma 20mm f/2 DG DN Contemporary lens for Leica L and Sony E mount cameras, one of the live presentations in Japanese included a question and answers session where Sigma CEO Kazuto Yamaki was asked if their lenses would come to more camera mounts. He confirmed that Sigma is looking to add at least one more mount to their mirrorless lens lineup in 2022.
He didn’t clarify which mount it could be, but there aren’t really many options out there. There’s Leica L, Sony E and MFT that Sigma already covers and Nikon Z, Canon RF and Fuji X, which they don’t. I suspect it probably won’t be that last one. Sure, it’s a popular mount, but I think they’ll target the full-frame systems where there still aren’t many 3rd party options first.