The Carl Zeiss Jena DDR Tessar f2.8 50mm manual focus prime lens with an M42 screw mount is a high-quality standard lens designed for photography enthusiasts. With a maximum aperture of f/2.8, this lens is ideal for capturing sharp images with beautifully blurred backgrounds. Its manual focus feature allows for precise control over the focus, while the 50mm focal length is perfect for capturing a wide range of subjects with stunning clarity and detail. Compatible with Zeiss cameras, this lens is a versatile and reliable choice for any photographer looking to elevate their photography game.