Conditions as seen. The Carl Zeiss Jena DDR 50mm F2.8 Tessar M42 Prime Lens is a high-quality standard lens designed for cameras with M42 mount. Made of durable aluminium, this manual focus lens features a maximum aperture of f/2.8, ideal for capturing crisp and detailed images. With a focal length of 50mm, this lens is perfect for portrait photography and everyday shooting. Compatible with Zeiss brand cameras, this prime lens is a reliable and versatile option for photographers looking to enhance their photography equipment.