Lens · prime
Nikkor 50mm f/2 AI
Nikon · 1977-1979
Discontinued35mm
Compact and lightweight. Short AI production run (1977-79), though the optically similar K version is also available. Nikkor 50mm f/2 AI: 6 elements in 4 groups, 6 aperture blades, 0.45m minimum focus, 52mm filter thread, 220g.
- Focal length
- 50mm
- Max aperture
- f/2
- Mount
- Nikon F
- Format
- 35mm
- Elements / groups
- 6 / 4
Known for
- General photography
- Travel
- Street
Considerations
- 6-blade aperture
- Slower than f/1.4 and f/1.8
Optical characteristics
Silverlog's editorial rating: our own judgement, not measured data.
Sharpness (wide)4, level 4 of 5
Sharpness (stopped)5, level 5 of 5
Contrast4, level 4 of 5
Flare resistance4, level 4 of 5
CA control4, level 4 of 5
Vignetting control4, level 4 of 5
Distortion control5, level 5 of 5
Bokeh: Pleasant, slightly hexagonal
Rendering: Sharp wide open, excellent contrast
Colour: Neutral
Silverlog's editorial rating, 1 to 5; five is best. Not lab-measured.
Common issues
- Focus ring wear
Buying guide
Less common due to short production. Check focus smoothness.
Specifications
| Mount | Nikon F |
| Focal Length | 50mm |
| Max Aperture | f/2 |
| Min Aperture | f/16 |
| Aperture Blades | 6 |
| Min Focus | 0.45m |
| Filter Size | 52mm |
| Weight | 220g |
Optical design
| Formula | Double Gauss |
| Elements | 6 |
| Groups | 4 |
| Coating | NIC (Nikon) |
Pricing
- Typical used price
- £150 - £250
- Mint
- ~£300
Indicative, no dated source.