Canon recently has filed two new RF lens patents in USA and Japan. Both lens patents are RF mount ultra-wide zoom lenses. The first one is RF 14-28mm f/2L USM lens, this lens will pair nicely with the RF 28-70mm f/2L USM lens. The second one is RF 10-24mm f/4L USM lens or RF 12-24mm f/4L USM lens, similar to EF 11-24mm f/4L USM lens.
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