Another detailed patent for an RF 70-300mm f/4-5.6 IS lens has appeared, the first one came as part of a patent for an RF 100-400mm f/3.5-5.6L IS USM. The 70-300mm zoom lens has always been a part of the budget telephoto zoom lens lines of various manufacturers, and it makes sense that we’ll see one … Continue reading Patent: Canon RF 70-300mm f/4-5.6 IS