The Canon RF 50mm f/1.2L USM lens was one of the first in the company's full frame mirrorless line, and it turned a lot of heads by establishing a new standard of quality that has been continued by many subsequent RF lenses. Just how much better is it than the original EF 50mm f/1.2L, and is it worth upgrading? This excellent video review takes a look at both lenses and what you can expect.