The Sony SEL400F28GM FE 400 mm F2.8 GM OSS is a high-performance telephoto lens designed for professional photographers. With its impressive focal length of 400mm and a bright maximum aperture of F2.8, this lens provides exceptional reach and excellent low-light performance.Whether you're capturing wildlife, sports events, or any other fast-moving subjects, the SEL400F28GM delivers stunning image quality and sharpness. Its advanced optical design includes 24 elements arranged in 17 groups, including three fluorite elements and one ED glass element. This combination effectively minimizes chromatic aberration and ensures clear, detailed images with accurate colors.Equipped with Sony's advanced XD Linear Motor technology, this lens offers fast, precise autofocus performance. It tracks subjects with speed and accuracy, even in challenging shooting conditions. The lens also features an Optical SteadyShot image stabilization system, which effectively compensates for camera shake and allows you to capture crisp, blur-free images.Built to withstand professional use, the SEL400F28GM is dust and moisture resistant. Its robust construction ensures durability and reliability in demanding shooting environments. The lens also features customizable focus hold buttons and a focus range limiter for enhanced control and flexibility.Overall, the Sony SEL400F28GM FE 400 mm F2.8 GM OSS is a top-of-the-line telephoto lens that delivers exceptional performance and versatility. It is a must-have tool for professional photographers who require superior image quality, fast autofocus, and reliable performance in any shooting situation.