K 8.4/2.8 Bird’s-Eye
General Description
A circular fish-eye lens.
| Product Information | |
|---|---|
| Exact Name | smc PENTAX BIRDS-EYE 1:2.8 8.4 mm |
| Color | black |
| Year of Introduction | Photokina 1982 |
Technical Specifications
| Optics | |
|---|---|
| Optical Formula | 10 elements in 7 groups |
| Aperture Range | f/2.8 ~ f/unknown |
| Number of Aperture Blades | unknown |
| Minimum Focusing Distance | lens has no focusing ring |
| Maximum Magnification | depends on the lens-to-subject distance |
| Special Features | bird’s-eye lens |
| Mechanics | |
| Front-Filter Thread | no |
| Gelatine-Filter Holder | yes |
| Maximum Diameter | unknown |
| Length | unknown |
| Weight | unknown |
| Special Features | manual diaphragm |
| Accessories | |
| Cap | unknown |
| Fitting Hood(s) | unknown |
| Fitting Case(s) | unknown |
