I am getting the effect with a 50 mm f/1.0. That’s close enough!
Though I did have a lens at work that was somewhere around 50 mm focal length, and it was f/0.6. Sadly, it was a single lens element designed for 610 nm red light, so of course no chromatic aberration correction, and probably poor performance off axis. And I found an oil immersion microscope objective design online that gives f/0.2, which was billed as quite an achievement, but I don’t like the idea of putting oil on my APS-C!
I thought this was amazing! There was a rider on a horse that had to be seen to be believed. Not to tangle our conversation too much, but I think this would have been a great place to apply limited depth of field. Kind of a bokeh-morte.
BTW for some extreme applications, computational photography might be the way to go. If you need a 50mm, f/0.2 lens, setting “F-Stop” to 0.2 and “Focal length” to 50 mm on the computer works, sure enough. But good luck building one (out of a huge flawless diamond or whatever), better just to create the effect using a multi-camera setup.