Mamiya-Sekor C 45mm F/2.8 S
Wide-angle prime lens • Film era • Discontinued
- Announced:
- · 1981
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · MAMIYA-SEKOR C 1:2.8 f=45mm S
- Class:
- · Fast 6x4.5 medium-format wide-angle prime lens
- · Professional model (Top class)
- System:
- · Mamiya M645 (1975)
Abbreviations
| C | Multi-layer anti-reflection coating is applied to the surfaces of lens elements. This anti-reflection coating increases light transmission, eliminates flare and ghosting, and maintains color consistence among all lens models. |
Model history (5)
| ■Mamiya-Sekor C 45mm F/2.8 | A | 9 - 7 | 0.50m | ⌀77 | 1975 ● | |
| ■Mamiya-Sekor C 45mm F/2.8 S | A | 9 - 7 | 0.45m | ⌀67 | 1981 ● | |
| ■Mamiya-Sekor C 45mm F/2.8 N | A | 9 - 7 | 0.45m | ⌀67 | ● | |
| ■Mamiya 645 AF 45mm F/2.8 | A | 9 - 7 | 0.45m | ⌀67 | 2000 ● | |
| ■Mamiya Sekor D AF 45mm F/2.8 | A | 9 - 7 | 0.45m | ⌀67 | 2008 ● | |
Specification
| Optical design: | |
| Medium format 6x4.5 | |
| 45mm | |
| F/2.8 | |
| 9 elements in 7 groups | |
| Floating element system | |
| Mamiya M645 [63mm] | |
| 75.6° | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 6 (six) | |
| Focusing: | |
| 0.45m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 470g | |
| <No data> | |
| Accessories: | |
| Screw-type 67mm | |
| Clamp-on square | |
| Not compatible |
Sources of data
- Mamiya-Sekor C interchangeable lenses for Mamiya M645 instructions.
- Mamiya M645 booklet (1982).
- Mamiya M645 booklet (1981).
- Mamiya M645 instructions (II).
- Mamiya M645 1000S instructions.
- Mamiya M645J instructions (II).
Manufacturer description
Superb optical quality and a newly perfected compact design make this a smooth and convenient wide-angle lens for general-use photography. Mamiya-Sekor's improved floating lens system automatically adjusts the lens for maximum corner and edge sharpness, even at minimum focusing distances.
The lens hood for the 45mm lens is of the square, slip-on type. Attach so that the sides are parallel with the sides of the camera body.
Other wide-angle prime lenses in the Mamiya M645 system
| ■Mamiya M645 mount (6) | |||||||||
| Mamiya-Sekor C 45mm F/2.8 N | A | 9 - 7 | 0.45m | ⌀67 | ● | ||||
| Mamiya-Sekor C 45mm F/2.8 | A | 9 - 7 | 0.50m | ⌀77 | 1975 ● | ||||
| Mamiya-Sekor C 55mm F/2.8 N | A | 8 - 6 | 0.45m | ⌀58 | ● | ||||
| Mamiya-Sekor C 55mm F/2.8 | A | 9 - 6 | 0.55m | ⌀58 | 1975 ● | ||||
| Mamiya-Sekor C 55mm F/2.8 S | A | 8 - 6 | 0.45m | ⌀58 | 1981 ● | ||||
| Mamiya A 55mm F/2.8 N/L | A | 8 - 6 | 0.45m | ⌀67 | 1992 ● | ||||