Canon has announced the RF5.2mm f/2.8L, created with the dual fish-eye lenses needed to convert a single DSLR into a VR content-creation machine. This new binocular accessory is compatible with the EOS R5, and confers 180-degree 3-dimensional stereoscopic recording in up to 8K on the flagship camera.
https://www.notebookcheck.net/The-new-Canon-RF5-2mm-f-2-8L-lens-sets-the-EOS-R5-up-for-VR-content-recording.571108.0.html