Sony FE 100-400mm F4.5–5.6 GM OSS is part of Sony’s high-end G Master (GM) lens series designed for full-frame E-mount cameras.
It offers a 100–400mm super-telephoto zoom range, making it ideal for wildlife, sports, birds, and distant action photography. The lens features fast and precise autofocus, Optical SteadyShot image stabilization, and excellent sharpness across the zoom range. Despite its long reach, it is relatively portable for a professional telephoto lens and also supports teleconverters for even more reach (up to 800mm with a 2x converter). Overall, it is a premium lens built for photographers who need powerful zoom, high image quality, and reliable performance in demanding outdoor conditions.