Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI)
The Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) is a 50mm f/1.4 manual-focus lens for the Nikon F (pre-AI) mount, made by Nikon from 1962-1974. It uses 7 elements / 5 groups, Double Gauss. Typical used value is $60 to $220, with most examples near $110, and it adapts to Sony E, Fuji X, MFT, Canon RF, Nikon Z, and L-mount with a plain mechanical adapter.
Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) specifications
Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) specifications
Why collectors want it
An early Nikon fast fifty with a warm classic rendering and gentle wide-open glow. Pre-AI lenses do not mount on some later Nikon bodies without modification but adapt freely to mirrorless. Many can be AI-converted for use on later film and DSLR bodies.
Mount and adapters for the Nikkor-S Auto 50mm f/1.4 (pre-AI)
The Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) has a native Nikon F (pre-AI) mount. Nikon F is the 1959 bayonet with a 46.5mm register that Nikon kept through the pre-AI, AI (1977), AI-S (1981), and autofocus eras. Every mirrorless mount has a shorter register than 46.5mm, so a plain mechanical adapter puts the lens at its design distance and infinity focus is preserved. Plain adapter ring for every manual-aperture Nikkor. Pre-AI lenses mount freely on adapters; their only compatibility problem is with later Nikon bodies whose meter-coupling tab they can bend.
| Camera system | Adapter | Infinity focus | Frames like | Guide |
|---|---|---|---|---|
| Sony E | Plain mechanical, 28.5mm | Yes | 50mm on full frame; 75mm on APS-C (1.5x) | Nikon F to Sony E |
| Fuji X | Plain mechanical, 28.8mm | Yes | 75mm on APS-C (1.5x) | Nikon F to Fuji X |
| MFT | Plain mechanical, 27.25mm | Yes | 100mm on Four Thirds (2x) | Nikon F to MFT |
| Canon RF | Plain mechanical, 26.5mm | Yes | 50mm on full frame; 80mm on APS-C (1.6x) | Nikon F to Canon RF |
| Nikon Z | Plain mechanical, 30.5mm | Yes | 50mm on full frame; 75mm on APS-C (1.5x) | Nikon F to Nikon Z |
| L-mount | Plain mechanical, 26.5mm | Yes | 50mm on full frame; 75mm on APS-C (1.5x) | Nikon F to L-mount |
Frequently asked
What mount is the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI)?
The Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) has a native Nikon F (pre-AI) mount. Nikon F is the 1959 bayonet with a 46.5mm register that Nikon kept through the pre-AI, AI (1977), AI-S (1981), and autofocus eras. With a plain mechanical adapter it fits Sony E, Fuji X, MFT, Canon RF, Nikon Z, and L-mount bodies and keeps infinity focus.
How much is the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) worth in 2026?
A used Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) typically sells for $60 to $220, with most clean working examples near $110. Basis: eBay sold listings and KEH, 2024-2025. This is an estimate, not an appraisal; condition, variant, and service history move the number.
Does the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) work on Sony E, Fuji X, and MFT?
Yes. Nikon F has a 46.5mm register and every mirrorless mount is shorter (16mm to 20mm), so a simple Nikon F adapter reaches infinity with no optics. On a full-frame body the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) frames as a 50mm lens; on APS-C (1.5x) it frames like a 75mm, on Canon APS-C (1.6x) like a 80mm, and on Micro Four Thirds (2x) like a 100mm. Plain adapter ring for every manual-aperture Nikkor. Pre-AI lenses mount freely on adapters; their only compatibility problem is with later Nikon bodies whose meter-coupling tab they can bend.
When was the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) made?
Nikon made the Nikkor-S Auto 50mm f/1.4 (pre-AI) from 1962-1974. That puts the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) 3 years into the life of the Nikon F mount, which appeared in 1959 on the Nikon F.
What is the optical design of the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI)?
The Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) uses 7 elements / 5 groups, Double Gauss. Double Gauss designs are near-symmetrical six- or seven-element formulas that support fast apertures with good correction; fast versions show glow from spherical aberration and swirl from mechanical vignetting wide open.
Which lenses are similar to the Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI)?
Close alternatives in the same focal class are the Pentax SMC Pentax-M 50mm f/1.4 (50mm f/1.4, $60 to $210), the Canon FD 50mm f/1.4 S.S.C. (50mm f/1.4, $55 to $200), and the Asahi Pentax Super-Multi-Coated Takumar 50mm f/1.4 (50mm f/1.4, $70 to $240). The Canon FD 50mm f/1.4 S.S.C. costs less on the used market.
Alternatives to the Nikkor-S Auto 50mm f/1.4 (pre-AI)
Lenses within 15mm of 50mm from other makers, ranked by how close they sit in focal length, aperture, and price.
Side-by-side comparisons
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Asahi Pentax Super-Multi-Coated Takumar 50mm f/1.4
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Asahi Pentax Super-Takumar 50mm f/1.4
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Canon FD 50mm f/1.4 S.S.C.
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Carl Zeiss Planar T* 50mm f/1.4 (C/Y)
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Minolta MD Rokkor 50mm f/1.4
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Nikon Nikkor 50mm f/1.2 AI-S
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Olympus OM-System Zuiko Auto-S 50mm f/1.4
- Nikon Nikkor-S Auto 50mm f/1.4 (pre-AI) vs Pentax SMC Pentax-M 50mm f/1.4