Worlds first AF super-telephoto zoom lens with telephoto end of 800mm1.. Powerful telephoto capabilities, with zoom range from 200mm through 800mm. Compatible with Extender RF1.4x and Extender RF2x, at all focal lengths.. Lightweight and compact design for a super-telephoto 4x zoom lens with an 800mm telephoto end allows for comfortable handheld shooting and excellent mobility.. Optimized optical design takes advantage of the RF mount to maintain high image quality through the zoom range in a compact super-telephoto zoom lens.