Nikon AI-S Nikkor 20mm F/3.5
Ultra-wide angle prime lens • Film era • Discontinued
- Announced:
- · October 1981
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · Nikon NIKKOR 20mm 1:3.5
- Class:
- · Slow full-frame ultra-wide angle prime lens
- · Professional model
- System:
- · Nikon F (1959)
Abbreviations
| AI-S | A manual focus lens with automatic maximum aperture indexing and automatic aperture control. Learn more |
Model history (6)
| ■Nippon Kogaku Nikkor-O 21mm F/4 • Pancake lens | M | 8 - 4 | 0.90m | ⌀52 | 1959 ● | |
| ■Nippon Kogaku / Nikon Nikkor-UD Auto 20mm F/3.5 | A | 11 - 9 | 0.30m | ⌀72 | 1967 ● | |
| ■Nikon Nikkor 20mm F/4 | A | 10 - 8 | 0.30m | ⌀52 | 1974 ● | |
| ■Nikon AI Nikkor 20mm F/4 | A | 10 - 8 | 0.30m | ⌀52 | 1977 ● | |
| ■Nikon AI Nikkor 20mm F/3.5 | A | 11 - 8 | 0.30m | ⌀52 | 1977 ● | |
| ■Nikon AI-S Nikkor 20mm F/3.5 | A | 11 - 8 | 0.30m | ⌀52 | 1981 ● | |
Specification
| Optical design: | |
| 35mm full frame | |
| 20mm | |
| F/3.5 | |
| 11 elements in 8 groups | |
| Nikon F [46.5mm] | |
| 94.5° (35mm full frame) | |
| On Nikon D APS-C [1.53x] cameras: | |
35mm equivalent focal length: | 30.6mm (in terms of field of view) |
35mm equivalent speed: | F/5.4 (in terms of depth of field) |
Diagonal angle of view: | 70.5° |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings + Auto Exposure setting) |
| 7 (seven) | |
| Focusing: | |
| 0.30m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 235g | |
| ⌀63×40.5mm | |
| Accessories: | |
| Screw-type 52mm | |
| HK-6 - Clamp-on round | |
| Nikon Teleconverter TC-200 → 40mm F/7 | |
| Nikon Teleconverter TC-201 → 40mm F/7 |
Sources of data
- Manufacturer's technical data.
- Nikkor lenses booklet (1984).
Manufacturer description
Weighing under nine ounces, the 20mm f3.5 Nikkor ultra-wide angle lens is one of the lightest and most compact in its class. It provides 94° angle of coverage and, when reverse-mounted on a Nikon bellows unit, offers magnifications up to 12X. The 20mm Nikkor is designed for quick operation and can be focused from infinity to 12 inches in a short one-third turn of the lens barrel. Plus, the wide depth-of-field adequately compensates for any slight focusing errors on the part of the user. Despite its ultra-wide coverage, the 20mm Nikkor accepts standard 52mm Nikon filters.
Notes
- This AI-S lens was designed for Nikon FA, FG, N2000, N6000 AI-S cameras and Nikon F3, EL2, EM, FE, FE2, FE10, FG-20, FM, FM2, FM10, FM3A, Nikkormat FT3 AI cameras. The automatic aperture control will only be available on AI-S cameras.
- AI and AI-S lenses are backward compatible with Nikon F, F2, Nikkormat FS, FT, FT2, FTN, EL, ELW cameras.
- On Nikon digital SLR cameras, the automatic exposure metering with AI and AI-S lenses will not be available on D40, D40X, D60, D70, D70s, D80, D3000-D3500, D5000-D5600 series.
Other ultra-wide angle prime lenses in the Nikon F system
| ■Nikon F mount (17) | |||||||||
| Nikon Nikkor 13mm F/5.6 | A | 16 - 12 | 0.30m | -- | 1975 ● | ||||
| Nikon AI Nikkor 13mm F/5.6 | A | 16 - 12 | 0.30m | -- | 1977 ● | ||||
| Nikon AI-S Nikkor 13mm F/5.6 | A | 16 - 12 | 0.30m | -- | 1982 ● | ||||
| Nippon Kogaku / Nikon Nikkor-QD[·C] Auto 15mm F/5.6 | A | 14 - 12 | 0.30m | -- | 1970 ● | ||||
| Nikon Nikkor 15mm F/5.6 | A | 14 - 12 | 0.30m | -- | 1976 ● | ||||
| Nikon AI Nikkor 15mm F/5.6 | A | 14 - 12 | 0.30m | -- | 1977 ● | ||||
| Nikon AI Nikkor 15mm F/3.5 | A | 14 - 11 | 0.30m | -- | 1978 ● | ||||
| Nikon AI-S Nikkor 15mm F/3.5 | A | 14 - 11 | 0.30m | -- | 1981 ● | ||||
| Nikon Nikkor 18mm F/4 | A | 13 - 9 | 0.30m | ⌀86 | 1974 ● | ||||
| Nikon AI Nikkor 18mm F/4 | A | 13 - 9 | 0.30m | ⌀86 | 1977 ● | ||||
| Nikon AI-S Nikkor 18mm F/3.5 | A | 11 - 10 | 0.25m | ⌀72 | 1981 ● | ||||
| Nikon Nikkor 20mm F/4 | A | 10 - 8 | 0.30m | ⌀52 | 1974 ● | ||||
| Nikon AI Nikkor 20mm F/4 | A | 10 - 8 | 0.30m | ⌀52 | 1977 ● | ||||
| Nippon Kogaku / Nikon Nikkor-UD Auto 20mm F/3.5 | A | 11 - 9 | 0.30m | ⌀72 | 1967 ● | ||||
| Nikon AI Nikkor 20mm F/3.5 | A | 11 - 8 | 0.30m | ⌀52 | 1977 ● | ||||
| Nikon AI-S Nikkor 20mm F/2.8 | A | 12 - 9 | 0.25m | ⌀62 | 1984 ● | ||||
| Nippon Kogaku Nikkor-O 21mm F/4 • Pancake lens | M | 8 - 4 | 0.90m | ⌀52 | 1959 ● | ||||