Nikon's classic manual-focus 20mm ultra-wide — Ai-S coupling with quality optics for film and adapted mirrorless.
The Nikon Nikkor 20mm f/2.8 Ai-S is a manual-focus ultra-wide prime from Nikon's Ai-S lens generation, providing 20mm coverage on full-frame. It has served photographers since the 1980s and continues to be used adapted to modern mirrorless cameras.
Optically good for its era — sharp from f/5.6 with CRC (Close Range Correction) improving performance at close distances. The 20mm ultra-wide perspective provides dramatic environmental images. Manual focus with Nikon's typically smooth, precise helicoid action.
Nikon F mount with 62mm filter thread. Approximately 270g — compact and lightweight. Ai-S coupling provides full metering compatibility on Nikon film bodies. Full-frame coverage. CRC system. Minimum focus distance 25cm. Metal construction.
Available used at budget to mid-range prices. Works beautifully on Nikon Z mirrorless via FTZ adapter with focus peaking. Check for smooth focus ring. The AF-S 20mm f/1.8G and Z 20mm f/1.8 S are dramatically better for AF users. A charming manual ultra-wide for adapted mirrorless shooting.