
Canon Patents: 300mm F2.8 1.4x, 400mm F2.8 1.4x, 600mm F4 1.4x with Built-in Teleconverters
Canon filed new RF-mount lens patents for 300mm F2.8 1.4x, 400mm F2.8 1.4x, 600mm F4 1.4x with built-in teleconverters. [Publication number] P2022142979 [Publication…