Mamiya-Sekor NB 127mm F/3.8
Short telephoto prime lens • Film era • Discontinued
- Announced:
- · 1973
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · MAMIYA-SEKOR NB 1:3,8 f=127mm
- Class:
- · Slow 6x7 medium-format short telephoto prime lens
- · Professional model (Top class)
- System:
- · Mamiya RB67 (1970)
Model history (3)
| ■Mamiya-Sekor 127mm F/3.8 | A | 5 - 3 | ⌀77 | 1970 ● | ||
| ■Mamiya-Sekor NB 127mm F/3.8 | A | 5 - 3 | ⌀77 | 1973 ● | ||
| ■Mamiya-Sekor C 127mm F/3.8 | A | 5 - 3 | ⌀77 | 1974 ● | ||
| —Mamiya-Sekor C 127mm F/3.8 Golden Lizard "RB67 11th Anniversary" | 1982 ● | |||||
Specification
| Optical design: | |
| Medium format 6x7 | |
| 127mm | |
| F/3.8 | |
| 5 elements in 3 groups | |
| Mamiya RB67 [111mm] | |
| 39.1° | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| Built-in leaf shutter: | |
Type: | Mechanical Seiko #1 |
Range of shutter speeds: | 1 - 1/400 + T |
Self-timer (V): | - |
Shutter speed control: | Shutter speed ring |
Flash sync mode: | M & X sync |
Flash sync terminal: | Yes |
| Focusing: | |
| <No data> | |
| 0.434m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | None; focusing from the camera |
| Physical characteristics: | |
| <No data> | |
| <No data> | |
| Accessories: | |
| Screw-type 77mm | |
| Screw-type round | |
| Not available |
Source of data
- Own research.
Mamiya-Sekor NB series
The transition generation of lenses designed for Mamiya RB67 series medium format 6x7 SLR cameras. Produced in 1973-1974.
- Optically identical to the first generation lenses;
- New Barrel design that matches the later C series;
- Mechanical Seiko #1 leaf shutter;
- Fully synchronized for M- and X-settings so that you can work with flash at all shutter speeds;
- Fully automatic diaphragm;
- Single-layer anti-reflection coating;
- Standardized 77mm filter thread mount for optimized handling with accessories.
Other short telephoto prime lenses in the Mamiya RB67 system
| ■Mamiya RB67 mount (13) | |||||||||
| Mamiya-Sekor 127mm F/3.8 | A | 5 - 3 | ⌀77 | 1970 ● | |||||
| Mamiya-Sekor C 127mm F/3.8 | A | 5 - 3 | ⌀77 | 1974 ● | |||||
| Mamiya K/L 127mm F/3.5 L | A | 6 - 4 | 0.64m | ⌀77 | 1990 ● | ||||
| Mamiya-Sekor C 150mm F/4 SF | A | 5 - 3 | 0.86m | ⌀77 | 1977 ● | ||||
| Mamiya K/L 150mm F/3.5 L | A | 6 - 4 | 0.82m | ⌀77 | ● | ||||
| Mamiya K/L 180mm F/4.5 L-A | A | 4 - 3 | 1.10m | ⌀77 | ● | ||||
| Mamiya-Sekor 180mm F/4.5 | A | 5 - 3 | 1.11m | ⌀77 | 1973 ● | ||||
| Mamiya-Sekor C 180mm F/4.5 | A | 5 - 3 | 1.11m | ⌀77 | 1974 ● | ||||
| Mamiya K/L 210mm F/4.5 APO L | A | 7 - 5 | 1.43m | ⌀77 | 1990 ● | ||||
| Mamiya-Sekor C 250mm F/4.5 | A | 5 - 4 | 1.85m | ⌀77 | ● | ||||
| Mamiya K/L 250mm F/4.5 L-A | A | 5 - 4 | 1.85m | ⌀77 | ● | ||||
| Mamiya-Sekor 250mm F/4.5 | A | 5 - 4 | 1.85m | ⌀77 | 1970 ● | ||||
| Mamiya K/L 250mm F/4.5 APO L | A | 7 - 5 | 1.86m | ⌀77 | 1990 ● | ||||