This is the new Laowa 10x to 50x super macro lens that has just been announced in China. There is no English press nor pricing info outside China. All we know is that the whole set (lens + full set of 4 tube lenses) is priced 8999 Yuan (roughly $1250). It will be available in different mounts: EF, F, E, R, Z, L, G, PL.
Checked some of the image samples and it actually looks like a funny lens!