You must have watched vid for some clip on thing. The one in op is full anamorphic lens. It's 50mm lens with 1.33 squeeze factor, and that's it. Can't be fitted to anything else, and it will be manual only.
Second thing. Anamorphic lenses are used for filming. They give you 'hollywood' look, and they tend to be very expensive. New ones cost around three grand at the lowest end, and go up to 50k for the pro ones.