Mamiya-Sekor C 65mm F/4.5
Wide-angle prime lens • Film era • Discontinued
- Announced:
- · 1974
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · MAMIYA-SEKOR C 1:4.5 f=65mm
- Class:
- · Slow 6x7 medium-format wide-angle prime lens
- · Professional model (Top class)
- System:
- · Mamiya RB67 (1970)
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 (3)
| ■Mamiya-Sekor 65mm F/4.5 | A | 8 - 8 | ⌀77 | 1970 ● | ||
| ■Mamiya-Sekor NB 65mm F/4.5 | A | 8 - 8 | ⌀77 | 1974 ● | ||
| ■Mamiya-Sekor C 65mm F/4.5 | A | 8 - 7 | ⌀77 | 1974 ● | ||
Specification
| Optical design: | |
| Medium format 6x7 | |
| 65mm | |
| F/4.5 | |
| 8 elements in 7 groups | |
| Floating element system | |
| Mamiya RB67 [111mm] | |
| 69.5° | |
| 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> | |
| 0.085m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | None; focusing from the camera |
| Physical characteristics: | |
| 835g | |
| ⌀?×69mm | |
| Accessories: | |
| Screw-type 77mm | |
| 80mm - Clamp-on square | |
| Not available |
Sources of data
- Interchangeable lenses for Mamiya RB67 instructions.
- The photograph. Mamiya RB67 Pro S booklet.
- Mamiya RB67 Pro S price list by Bell & Howell (1975).
- Mamiya RB67 Pro S booklet (1977).
- Mamiya RB67 Pro-S booklet.
- Mamiya RB67 Pro-S instructions.
Manufacturer description
The 65mm f/4.5 lens is equivalent to the 35mm lens used with the 35mm camera and may be termed a standard short focus lens. A fairly straightforward lens visually, it is appreciated by professional photographers as a moderate wide-angle lens. Distortion of the subject perspective is minimal, its picture angle is sufficiently wide, it has a great depth of field, and also features a floating element system.
Mamiya-Sekor C series
The second generation of lenses designed for Mamiya RB67 series medium format 6x7 SLR cameras. Introduced with the Mamiya RB67 Professional S in 1974.
- New barrel design;
- 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;
- Multi-layer anti-reflection coating;
- Standardized 77mm filter thread mount for optimized handling with accessories (except the 37/4.5 fisheye and 500/8 lenses).
Other wide-angle prime lenses in the Mamiya RB67 system
| ■Mamiya RB67 mount (6) | |||||||||
| Mamiya-Sekor 50mm F/4.5 | A | 11 - 8 | 0.28m | ⌀77 | 1970 ● | ||||
| Mamiya-Sekor C 50mm F/4.5 | A | 11 - 8 | 0.28m | ⌀77 | 1974 ● | ||||
| Mamiya-Sekor 65mm F/4.5 | A | 8 - 8 | ⌀77 | 1970 ● | |||||
| Mamiya-Sekor NB 65mm F/4.5 | A | 8 - 8 | ⌀77 | 1974 ● | |||||
| Mamiya K/L 65mm F/4 L | A | 9 - 8 | 0.35m | ⌀77 | 1990 ● | ||||
| Mamiya K/L 75mm F/3.5 L | A | 9 - 7 | 0.38m | ⌀77 | 1990 ● | ||||