This Petri c.c Auto lens is a high-quality standard lens with a maximum aperture of F2 and a focal length of 55mm. It is compatible with Petri mounts and is made of durable aluminum material. This lens is perfect for photography enthusiasts who are looking for a reliable and efficient lens to add to their collection. It has manual focus capabilities and is designed to work with Petri cameras. This lens is a great addition to any photography setup and is sure to provide clear and sharp images.