Delivering a 762mm full-frame equivalent reach in a remarkably compact 1335g body, this super-telephoto prime pairs 5.5-stop stabilization with a fast linear motor to fully resolve 40.2MP X-series sensors. Its weather-sealed construction and 9-blade diaphragm enable sharp subject separation in harsh conditions without the bulk typical of this focal length. This lens is best for wildlife and sports photographers who need handheld 500mm reach and cannot compromise on portability or autofocus speed.