16mm lenses on a 35mm camera?

[JZASMM]

I have an Arri 35 BL 2 that has a bayonet mount. It's darn near impossible to find 35mm lenses that aren't PL mounts, and someone the other day mentioned that 16mm lenses could cover the entire frame? I was just wondering what sort of truth there was to this, and how it would differ from using actual 35mm lenses. Thanks.

Cheers,

Jacob