You asked
Best camera for the sigma 50mm f 1 2 dg dn art?
For the Sigma 50mm f/1.2 DG DN Art, I'd start with the Sony a7 IV. It's a full-frame all-rounder, so the lens frames exactly as the 50mm it is, and it handles portraits and everyday shooting well.
If you want more resolution for detailed portraits or landscapes, the Sony a7R V is the one to pick. If you want something smaller to carry all day, the Sony a7C II keeps the full-frame look in a compact body, though the big, heavy lens will feel less balanced on it. The Sony a1 is the flagship option if money is no object.
Whichever body you choose, this lens is at its best for portraits, where that wide f/1.2 aperture gives you very soft backgrounds.
Written by Claude from this site's pages.