Nikon Nikkor 300mm f/4.5 Ai-S - Nikon F Mount

The Nikkor 300mm f/4.5 Ai-S is a classic manual focus telephoto lens, prized for its relatively compact dimensions compared to faster f/2.8 alternatives. It features a built-in retractable lens hood and a tripod mounting collar. The Ai-S version provides consistent exposure control with compatible Nikon bodies and is known for its solid all-metal construction and reliable optical performance for wildlife and sports photography. When assessing a used 300mm f/4.5 Ai-S, it is vital to check for smoothness in the long-throw focus ring and ensure there is no lateral play in the lens barrel. SDS inspects the aperture blades for oil and the internal optics for any signs of separation or haze. The tripod collar should lock securely, and the retractable hood should move freely without being overly loose.