Nikon's classic 105mm f/2.5 — Ai version of the legendary portrait prime, pre-Ai-S.
The Nikon Nikkor 105mm f/2.5 Ai is the Ai (Automatic Indexing) version of the legendary 105mm portrait prime — predating the Ai-S (ID 1629). Same outstanding portrait rendering in Ai mechanical coupling.
Same legendary optical quality as the Ai-S version — one of Nikon's most praised portrait lenses. Sharp from f/4 with beautiful rendering. The Ai coupling provides metering on all Ai-compatible bodies.
Nikon F mount with 52mm filter thread. Approximately 435g. Ai coupling — predates Ai-S. Same optics as Ai-S version. Praised by photographers including Steve McCurry.
Available used at budget to mid-range prices — the Ai version is slightly cheaper than Ai-S. Same outstanding optics. For manual-focus portrait photography. Works on Z via FTZ with focus peaking.