The Olympus SWD Zuiko Zoom Lens is a high-performance zoom-telephoto lens that features, for the first time, the SWD (Supersonic Wave Drive) autofocus system. ED lens elements are used extensively to correct the color blurring that can occur when telescopic lenses are extended to their maximum focal length, while the digital-dedicated design ensures high-definition performance with clear.The lens' autofocus is powered by Olympus' innovative SWD focusing technology. SWD combines different technologies to provide both high speed and high precision autofocusing, while allowing the lens to be operated with lower noise than before enables the camera to demonstrate the full power of its high-speed capability, providing extremely fast focusing.