Kowa zoom eyepiece with 20-60x magnification, specially designed for the Kowa TSN 880/770 spotting scope series
Below is an overview of all eyepieces suitable for Kowa 880 and 770 spotting scopes.
| Model | TE-10Z | TE-17W | TE-20H |
| Magnification | 20X-60X, Zoom | 30x, Wide | 25x, LER |
| Real field of view | 2.2 degrees-1.05 degrees | 2.4 degrees | 2.1 degrees |
| Apparent field of view | 44-63 degrees | 72 degrees | 52.5 degrees |
| Exit pupil | a) 4.4-1.5mm with TSN-770 Series b) 3.9-1.3mm with TSN-880 Series | a) 2.9mm with TSN-770 b) 2.6mm with TSN-880 Series | a) 3.5mm with TSN-770 b) 3.1mm with TSN-880 Series |
| Light-gathering power | a) 19.4-2.3 with TSN-770 b) 15.2-1.7 with TSN-880 Series | a) 8.4 with TSN-770 b) 6.8 with TSN-880 Series | a) 12.3 with TSN-770 b) 9.6 with TSN-880 Series |
| Twilight factor | a) 42.0-72.7 with TSN-770 b) 39.2-68.0 with TSN-880 Series | a) 51.4 with TSN-770 b) 48.1 with TSN-880 Series | a) 46.9 with TSN-770 b) 43.9 with TSN-880 Series |
| Eye relief | 17-16.5mm | 20mm | 23.0mm |
| Width at 1000m | 38.4-18.3 | 41.9 | 36.7 |
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| General | ||
|---|---|---|
| Type | scope eyepiece | |
| Brand | Kowa | |
| Series | TSN | |
| Guarantee | 5 years | |
| Including carrying bag | ![]() | |
| Suitable for | ||