Olympus 10×21 RCII
Key features:
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| Binocular Type | Roof Prism type |
|---|---|
| Magnification | 10x |
| Effective diameter of objective lens | 21mm |
| Diameter of exit pupil | 2.1mm |
| Actual field of view | 5.1-degree |
| Field of view at 1000m | 89m |
| Relative Brightness | 4.4 |
| Eye-relief | 9.5mm |
| Diopter adjustment range | Over ±2m-1 |
| Eye interval adjustment range | 39mm to 72mm |
| Closest Focusing Distance | 3m |
| Weight | 190g |
| Width (at maximum eye interval) | 108mm |
| Length (when eyecups are retracted) | 88mm |
| Thickness (at maximum eye interval) | 38mm |
| Lens composition | 3 groups, 5 elements |
| Coating | Multi-coating for eyepiece and objective lens, single layer coating for others |
