1, ef lens: it is an all-round development of the concept of focusing electronization.
2. RF lens: it is the core of system development, and EOS R system is expected to become an evolving imaging system.
Second, the characteristics are different?
1, ef lens: the camera and the microchip in the lens communicate with each other through electrical signals to drive the motor in the lens to focus.
2.rf lens: It has a large aperture with an inner diameter of 54 mm and a short back focal length, which greatly improves the flexibility of optical design and enables it to develop an ideal lens.
Third, the advantages are different.
1, ef lens: adopts the mode of "camera ranging, lens is driven by built-in motor", and there is no mechanical communication system between camera and lens.
2.rf lens: It aims to further expand the field of photography and provide users with more ideal lenses. The new bayonet specification is adopted, which improves the freedom of optical design and the possibility of system development. ?
Baidu encyclopedia-ef
Canon official website-radio frequency card port