Canon RF 400mm f/2.8L, RF 500mm f/4L, RF 600mm f/4L IS USM Lens Patents
Canon has filed three super telephoto prime lens patents in Japan. These products are the RF 400mm f/2.8L IS USM Lens, RF 500mm f/4L IS...
Canon has filed three super telephoto prime lens patents in Japan. These products are the RF 400mm f/2.8L IS USM Lens, RF 500mm f/4L IS...