Patent: Canon patents RF 200mm f/2L IS, RF 300mm f/2.8L IS and RF 500mm f/4L IS optical formulas
Canon is obviously working on RF mount versions of the legendary EF 200mm f/2L IS, EF 300mm f/2. 8L IS and EF 500mm f/4L IS lenses. Read more. . . The post Patent: Canon patents RF 200mm f/2L IS, RF 300mm f/2. canonrumors.com »