Nippon Kogaku / Nikon Nikkor-UD Auto 20mm F/3.5
Ultra-wide angle prime lens • Film era • Discontinued
- Announced:
- · November 1967
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · Nippon Kogaku NIKKOR-UD Auto 1:3.5 f=20mm
- · Nikon NIKKOR-UD Auto 1:3.5 f=20mm
- Class:
- · Slow full-frame ultra-wide angle prime lens
- · Professional model
- System:
- · Nikon F (1959)
Abbreviations
| UD | The lens consists of eleven elements. |
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 9 groups | |
| Nikon F [46.5mm] | |
| 94.5° (35mm full frame) | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 7 (seven) | |
| Focusing: | |
| 0.30m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 390g | |
| ⌀75×57.5mm | |
| Accessories: | |
| Screw-type 72mm | |
| HN-9 - Screw-type round | |
| <No data> |
Sources of data
- Manufacturer's technical data.
- Nikon/Nikkormat Sales Manual (March 1972).
- Nikon F2 Photography Guide.
- Nikkor lenses for Nikon and Nikkormat cameras.
Manufacturer description #1
The combination of 94° picture coverage, all-over sharpness and f3.5 speed makes this a favorite of serious Nikon and Nikkormat users, both hobbyist and professional.
Fully automatic and meter-coupled, it enables you to shoot as rapidly as the situation requires while keeping the subject clearly in view through the reflex finder. The lens may be focused as close as 12 inches. Depth-of-field is so great that with aperture set at f8 and distance at 7 feet everything is sharp from less than 3 feet to infinity.
Manufacturer description #2
The concept of optical construction is entirely new.
The lens consists of 11 elements in 9 groups, with back focus 1.87 times longer than the focal length. Thus, the lens can be mounted on the camera with the mirror in normal viewing position. (There is no need to lock up the mirror.)
With this lens, there is almost no need to focus, if the diaphragm is closed down slightly. This is one of the advantages of the extremely short focal length which provides profound depth of field.
As coma aberration is minimized, the lens provides very sharp image with high contrast even at full aperture. The f/3.5 aperture and equal distribution of brightness in the edge areas of the image field facilitate viewing and focusing over the entire focusing screen.
Like other Nikkor Auto lenses, the UD Auto features the automatic aperture diaphragm and meter coupling. With accent on exaggerated perspective, this super wideangle lens is effective in reproducing various subject matters with striking effects. It is especially suited for architectural photography and for shooting interiors in constricted areas.
Notes
- This non-AI lens was designed for Nikon F, F2, Nikkormat FS, FT, FT2, FTN, EL, ELW 35mm film SLR cameras.
- Non-AI lenses cannot be used on Nikon digital SLR cameras (except for the Df) or late (AI) film SLR cameras. However, non-AI lenses can be fitted to Nikon FM, FE, EL2, F3, F4 and Nikkormat FT3 cameras which used the AI metering system but allowed the metering coupling lever to be disengaged. The F5 could have this mechanism fitted as an optional extra. Non-AI lenses can be also fitted to the Nikon F2A and F2AS cameras because the AI mechanism was fitted to the removable metering prism.
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 ● | ||||
| 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 ● | ||||
| 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 ● | ||||