The Jupiter Jupiter-11 135mm f/4 Telephoto Lens is a high-quality lens designed for Zorki cameras with manual focus capability. With a maximum aperture of f/4, this lens is ideal for capturing detailed images with a shallow depth of field. The telephoto focal length of 135mm allows for versatile shooting, from portrait photography to landscape shots. The M39 mount ensures compatibility with Zorki cameras, making this lens a valuable addition to any photographer's kit.