The latest Canon patents: 11-24mm f/4 full frame lens and curved aperture diaphragm

Canon 11-24mm f:4 lens patent
Canon filed a patent in Japan for a new 11-24mm f/4 ultra wide-angle zoom lens designed for full frame cameras.

Canon curved aperture patent
The second Canon patent is for a curved aperture diaphragm that follows the curvature of the glass element inside the lens. This aperture design will most likely be used to make retractable lenses even smaller.

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