With a constant fixed aperture of f/4 across all focal lengths, the AF-S Nikkor 70-200mm f/4G ED VR is an alternative to the AF-S Nikkor 70-200mmf/2.8 VR II telephoto lens that is intended for a more professional market. Like its big brother, the 70-200mm f/4 is equipped with the latest generation of optical image stabilization for which Nikon announces a huge gain of 5 stops.The telephoto lens’s VR system has two modes of operation: a classic mode and an “Active” mode that stabilizes high-frequency shake for images taken in motion.The autofocus utilizes Silent Wave Motor (SWM) technology,