Kowa's 60mm, 61mm, 66mm & 77mm spotting scopes can be coupled with any of several eyepieces for your specific needs. There are single magnification models and zooms, with some having apparent viewing angles (real viewing angle multiplied by the magnification factor) of >60°.
| Magnification | 20-40x |
| Angle of View |
20x: 1.9° 40x: 1.4° |
| Field-of-View (@ 1000 Yds) |
20x: 100' (33 m at 1000 m) 40x: 73' (24 m at 1000 m) |
| Exit Pupil Diameter |
20x: 3.0mm with 60mm & 61mm, 3.3mm with 66mm, 3.8mm with 77mm 40x: 1.5mm with 60mm & 61mm, 1.6mm with 66mm, 1.9mm with 77mm |
| Eye Relief |
20x: 18mm 40x: 14mm |
| Relative Brightness |
20x: 9.0 with 60mm & 61mm, 10.9 with 66mm, 14.8 with 77mm 40x: 2.2 with 60mm & 61mm, 2.7 with 66mm, 3.7 with 77mm |
| Twilight Factor |
20x: 34.6 with 60mm & 61mm, 36.3 with 66mm, 39.2 with 77mm 40x: 49.0 with 60mm & 61mm, 51.4 with 66mm, 55.5 with 77mm |
| Weatherproofing | Waterproof & fogproof |
| Dimensions | 3.3 x 1.4" (84 x 37mm) LxW |
| Weight | 0.30 lb (136 g) |
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Comments about Kowa TSE-Z6 20-40x Zoom Spotting Scope Eyepiece:
KOWA products are routinely seen on the line at Camp Perry. (National Pistol and Rifle matches- over 100 years old. Camp Perry, Ohio.) I bought this eyepiece to go with a KOWA scope specifically set up for the handgun portions of the event. I have been using it getting ready for the event- and enjoy the crisp, clear views- unobstructed by the fog, etc. often associated with warm & humid, Ohio days. The zoom function is invaluable, when setting up for the different distances.
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