Sony’s first large-aperture E-mount telephoto prime is one of the lightest in its class, thanks to an innovative optical design with three fluorite elements and the use of magnesium alloy components. Thanks to the reduced number of elements at the front of the barrel, the lens is perfectly balanced. It combines outstanding image quality with extraordinary focusing speed and precision, thanks to two high-speed XD Linear Motors. The 11-blade circular aperture produces beautifully blurred backgrounds. The FE 400mm F2.8 GM OSS is also compatible with Sony’s 1.4x and 2.0x E-mount tele-converters for even longer reach.