William Optics' adapters include M48 T-mounts for Canon EOS and EOS R, Nikon F and Z, Sony E, Fuji X, Olympus Micro 4/3 and Pentax K, 2-inch Rotolocks for the Gran Turismo 71 and Zenithstar 61, M92-to-M63 and M48-to-M42 adapters, and a flanged adapter for the SBIG STL-11000. Part of T-Rings, Adapters & Spacers.