The Contax/Carl Zeiss 645 Sonnar T 140mm F/2.8 is a high-quality telephoto lens designed for Contax cameras. This lens features a fast and accurate auto focus system, as well as manual focus capabilities for precise control over your images. With a maximum aperture of f/2.8, this lens is ideal for capturing crisp and detailed shots with beautiful bokeh. The lens is compatible with Contax cameras and is renowned for its exceptional image quality, making it a popular choice among photographers looking to expand their creative capabilities.