More telephoto zoom lens patents for the RF mount have been uncovered by Canon News. A couple of them look to be “consumer” zoom lenses along with what is likely an L lens in the RF 100-400mm f/3.5-5.6L IS. Japan Patent Application 2019-020679 Canon RF 100-400mm f/3.5-5.6L IS USM Focal distance 102.21 195.97 389.86 ​ F number … Continue reading Patent: Canon RF 100-400mm f/3.5-5.6L IS and more