Ricoh XR Rikenon 16mm F/2.8 Fisheye
Fisheye lens • Film era • Discontinued
- Announced:
- · 1982
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · RICOH XR RIKENON FISHEYE 1:2.8 16mm
- Class:
- · Fast full-frame diagonal fisheye lens
- System:
- · Ricoh K (1977)
Abbreviations
| FISHEYE | An ultra-wide angle lens with strong uncorrected barrel distortion and extreme angle of view. |
Specification
| Optical design: | |
| 35mm full frame | |
| 16mm | |
| F/2.8 | |
| 9 elements in 8 groups | |
| Diagonal (full-frame) fisheye | |
| Pentax K [45.5mm] | |
| 180° | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 6 (six) | |
| Focusing: | |
| 0.15m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 300g | |
| ⌀66×50mm | |
| Accessories: | |
| Removable front filters are not accepted | |
| Built-in petal-shaped | |
| <No data> |
Sources of data
- Ricoh cameras booklet.
- Ricoh SLR systems booklet.
Manufacturer description
The 180° fish-eye perspective dramatically emphasizes angles in architecture and interior scenes, faces and breathtaking outdoors subjects.
Typical characteristics of fisheye lenses
- Extreme angle of view (at least 180° diagonally);
- Circular types (the image circle of the lens is inscribed in the image frame) or diagonal types (cover the entire image frame);
- Usually of equidistant projection type, with the distance from the picture center to any given point always proportional to the angle from the optical axis to that point;
- Huge barrel distortion;
- Short closest focusing distance (0.20 - 0.30m with 35mm full-frame prime lenses);
- Very large depth of field, eliminating the need for autofocus or precise manual focusing;
- Due to the extreme angle of view and convex front element, front filters cannot be used;
- Often equipped with a filter turret with swivel-mounted filters;
- Often come with a small, built-in petal-shaped lens hood.
From the editor
Same lens as the Sigma 16/2.8 Filtermatic Fisheye.
Lenses with similar focal length
| ■Pentax K mount (6) | |||||||||
| smc Pentax-A 16mm F/2.8 Fisheye | A | 9 - 7 | 0.20m | -- | 1984 ● | ||||
| smc Pentax 17mm F/4 Fisheye | A | 11 - 7 | 0.20m | -- | 1975 ● | ||||
| Sigma MF 15mm F/2.8 Fisheye Multi-Coated ZEN | A | 8 - 7 | 0.15m | -- | 1990 ● | ||||
| Sigma MF 16mm F/2.8 Filtermatic Fisheye Multi-Coated | A | 9 - 8 | 0.15m | -- | 1980 ● | ||||
| Sigma[-XQ] MF 16mm F/2.8 Filtermatic Fisheye Multi-Coated | A | 11 - 9 | 0.15m | -- | 1978 ● | ||||
| Zenitar 16mm F/2.8 Fisheye MC akaЗЕНИТАР-К 16mm F/2.8 РЫБИЙ ГЛАЗ МС akaЗЕНИТАР-М 16mm F/2.8 РЫБИЙ ГЛАЗ МС akaЗЕНИТАР-Н 16mm F/2.8 РЫБИЙ ГЛАЗ МС | A | 11 - 7 | 0.30m | -- | 1990 ● | ||||
| ■Interchangeable mount (2) | |||||||||
| Sigma[-XQ] MF 16mm F/2.8 Filtermatic Fisheye Multi-Coated [YS] | A | 11 - 8 | 0.15m | -- | 1973 ● | ||||
| BelOMO Peleng A 17mm F/2.8 Fisheye MC [T] akaБелОМО ПЕЛЕНГ А 17mm F/2.8 МС РЫБИЙ ГЛАЗ | P | ? - ? | 0.30m | -- | ● | ||||