A recent patent has shown that the geniuses at Canon are seemingly cooking up new catadioptric lenses for full-frame models. It’s headache-inducing stuff, albeit interesting, because this is an old-school optical system making a resurgence.
Patent 2026-033938 was published by the Japan Patent Office and contains a bunch of full-frame zoom lenses, among them a 28-45mm f/1.2, 28-55mm f/1.4, and a 35-70mm f/1.4, that have a catadioptric design.
