The Sony FE 400mm F4.5 GM OSS is a super-telephoto prime lens for full-frame Sony E-mount cameras, designed for wildlife, sports, and aviation photography where long focal lengths and fast handheld shooting are required. The Sony 400mm F4.5 GM OSS lens integrates G Master optics with Super ED and ED glass elements and Nano AR Coating II to reduce chromatic aberration, flare, and ghosting, even in backlit conditions. The 11-blade circular aperture contributes to the smooth and uniform bokeh typical of the G Master range. Autofocus is powered by two XD linear motors that ensure fast, precise, and quiet tracking, effective even during high-speed burst shooting on the latest camera bodies. This lightweight 400mm prime telephoto lens weighs 994g and is 242mm long, making it the lightest in its class and suitable for long shooting sessions on the move. The construction is dust and moisture resistant, with a fluorine coating on the front element for easy cleaning. Four focus hold buttons, a customizable function ring, Linear Response MF, and a focus range limiter offer complete operational control. Compatibility with Sony SEL14TC and SEL20TC teleconverters extends the focal length up to 800mm, while the integrated Optical SteadyShot stabilizer enables sharp handheld shots. Discover the price and availability of the Sony FE 400mm F4.5 GM OSS lens at Martcom.