Nikon Nikkor 135mm f/2.8 Ai - Nikon F Mount

The Nikkor 135mm f/2.8 Ai is a classic telephoto lens providing a bright f/2.8 maximum aperture for better low-light performance and shallower depth of field than the f/3.5 version. It features a built-in telescoping lens hood and a solid metal barrel. The lens is particularly useful for portraits and stage photography where a longer reach and decent light gathering are required on Nikon F-mount systems. On the used market, focus smoothness is a key indicator of condition, as these lenses often saw heavy professional use. SDS inspects the aperture mechanism for sluggishness caused by oil on the blades. Given the length of the lens, we also check for any lateral play in the barrel and ensure the optical alignment remains true, with no evidence of internal fungus.