The product is a Nikon Micro NIKKOR P AUTO 1:3.5 F=55mm lens by Nippon Kogaku Japan. It features a maximum aperture of f=3.5 and a macro magnification capability of up to 1:2 (half life size). The lens is manual focus with a Nikon F mount, making it compatible with Nikon cameras. With a focal length of 55mm, this lens is perfect for capturing detailed close-up shots with stunning clarity and sharpness.