Become a master of wildlife and sports photography with the Fe 600mm f/4 Gm Oss Lens for Sony E. As Sony's longest-reaching prime lens, this innovative product is packed with the company's most advanced optical and mechanical technologies, delivering exceptional image quality, extraordinary focusing speed, and precision. Weighing approximately 6.71 lbs., this lens is the lightest in its class, boasting an extremely balanced design for the best possible shooting experience. It's perfect for professional sports, wildlife, and news photographers seeking to capture subjects at great distances with extreme accuracy and detail. The Fe 600mm F4 Gm Oss lens features two extreme dynamic (Xd) linear motors that drive the lens' focus group, providing fast, precise autofocus and reliable subject tracking. Supported by specially developed motion algorithms, these motors minimize lag and instability while controlling noise levels, resulting in quick, accurate, and quiet autofocus performance.