This refers to a specific lens manufactured by Nikon. It’s characterized by its 85mm focal length, a wide aperture of f/2, and inclusion in the AI-S (Automatic Indexing – Shutter priority) lens series. This lens is manually focused and designed for Nikon F-mount cameras.
Its significance lies in its ability to produce pleasing portraits and low-light images, due to the combination of focal length and wide aperture. Historically, these lenses represented a high point in optical design and build quality from Nikon, offering photographers a desirable balance of sharpness, bokeh, and compact size. Its mechanical construction contributes to its longevity and tactile feel.