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Thanks to its larger exit pupil compared to the other Highlander eyepieces, the 21x eyepiece stands out for its high relative brightness: ideal for dusk and dawn observation, and in conditions of pronounced atmospheric turbulence.
Compatible exclusively with the Kowa Highlander PROMINAR 82mm giant binocular. Two units must be purchased for full binocular use; this listing is for a single eyepiece.
| Specification | Value |
|---|---|
| Magnification | 21x Wide |
| Field of view | 3.15° |
| Field of view at 1000m | 52.0 m |
| Exit pupil | 3.9 mm |
| Relative brightness | 15.2 |
| Twilight factor | 41.5 |
| Eye relief | 17.0 mm |
| Compatibility | Kowa Highlander PROMINAR 82mm |
Sold as a single eyepiece: two units are required for full binocular use on the Highlander.
