You asked
Viltrox af 50mm f 1 4 pro vs sigma 50mm f 1 4 dg dn art?
Both are 50mm f/1.4 autofocus primes for full frame, with no stabilisation. On full frame they frame the same, and on APS-C both behave like a 75mm with the depth of field of f/2.1. The real difference is which mount you shoot.
- Pick the Viltrox AF 50mm f/1.4 Pro if you shoot a Nikon Z body. It's made for Sony E and Nikon Z.
- Pick the Sigma 50mm f/1.4 DG DN Art if you shoot L-Mount, such as Leica SL or Panasonic Lumix S bodies. It's made for Sony E and L-Mount.
If you shoot Sony E, either lens fits, so choose between them on price and what else you need. For a first fast prime, see Lenses, and for people, Portraits.
Written by Claude from this site's pages.