Here's a neat video that goes behind the scenes about how Atlas Lens Co made custom spherical IMAX lenses for Dune Pt 3. There's some wild stuff in here: their new IMAX lenses actually cover up to a 100mmx100mm frame (!!!).

Also I've never sen the inside of a lens design lab before; what a cool place!

https://www.youtube.com/watch?v=dzrTFsbLUt4