Nikon Nikkor 85mm F2 Ai-S Lens Only Works at F2

Serial number: 337045

It comes with both caps.

The lens is in nice cosmetic condition with clean optics but there is oil on the blades and as a result the diaphragm doesn’t close down properly. The lens can be used successfully at F2 but at other apertures the diaphragm only stops down when the aperture lever on the rear of the lens is pushed.