Nikon 400mm f/5.6 NIKKOR*ED IF AIS Manual Focus Lens Review

The Nikon 400mm f/5.6 NIKKOR ED IF AIS is a manual focus super-telephoto lens from Nikon's pre-autofocus era, now available on the used market. Built with ED glass and internal focusing, it was designed for sports, wildlife, and travel photographers who wanted serious reach without the bulk of faster telephoto primes. At 42.3 ounces and 10 inches long, it's relatively portable for a 400mm lens. The built-in hood and 72mm filter thread add practical value, and the internal focusing mechanism keeps the barrel from extending during use.

As an AIS manual focus lens, it's best suited for photographers shooting on Nikon F-mount bodies who are comfortable with manual focus and metering. It will mount on modern Nikon DSLRs, though you'll lose autofocus and some metering features depending on the body. At the $241 price point in used condition, it offers an affordable entry into super-telephoto photography for those willing to work manually. This is a legacy lens that demands skill but rewards patience with sharp images, provided you can nail focus on moving subjects.