The Nikon Nikkor 80-200mm f/4 AI-S is a manual focus telephoto zoom with a constant f/4 aperture, introduced around 1981. The constant aperture design was a professional feature in the manual focus era, providing consistent exposure throughout the zoom range. This was one of Nikon's most popular telephoto zooms before the AF era began.
Optical performance is good. Sharpness is respectable throughout the range, particularly when stopped down to f/5.6. The constant f/4 aperture — faster than many variable-aperture competitors — allows consistent exposure and reasonable viewfinder brightness. The AI-S specification provides linear aperture control for improved auto-exposure accuracy.
Nikon F mount, AI-S specification. Filter thread is 52mm — impressively compact for an 80-200mm zoom. Weight is approximately 720 grams. Build quality is excellent with solid metal construction. A push-pull zoom mechanism provides rapid focal length changes. The compact filter thread keeps filter costs reasonable.
Available on the used market at modest prices. Check for smooth push-pull zoom action — looseness develops over time. The constant f/4 aperture is the main advantage over variable-aperture alternatives. A solid vintage telephoto zoom for Nikon film shooters. The later AF 80-200mm f/2.8 is dramatically more capable but much heavier and more expensive.