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UWA-zoom, anyone?
Ultra wide aperture FF zoom, that is.
A Canon designer has been packing in a lot of elements to create a 50-80mm zoom lens. Calculated for many different versions, with a f1.1 and f1.2 version with impractical backfocus distance of about 6 mm, and more practical versions like a f1.2 with 14 to 22mm back focus, and f1.4, 1.6 and 1.8 versions.

With around 24 elements and lengths (depending on computed version) between 180 and 230mm, it would be a beast. Maybe one will surface somewhere in the future as specialized video lens?

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