The Nikon Nikkor AI-S 4 is an 80 mm lens suitable for portrait photography. The focal length of this Nikon lens can be adjusted between 80 to 200 mm, making it ideal for wildlife and sports photography as well. With an aperture of f/4, the Nikon Nikkor AI-S 4 allows you to take bright photos even in low-light conditions. With a construction of 5 elements in 5 groups, this 80 mm lens reduces aberrations, enabling you to shoot high-quality photos. Moreover, this Nikon lens accepts 52 mm filters to protect it from dust and glare.