The Kowa TE-9Z zoom eyepiece is compatible with the manufacturer's 82SV and 600/660 series scopes, with a viewing distance of 16.5 mm.
The Kowa TE-11WZ boasts a huge field of view (1.32 - 2.4°), and the 2 low-dispersion XD members of the lens system reduce chromatic aberration to almost zero. Its pupil distance is 17 mm.
The eyepiece's handy bayonet mount ensures quick and easy interchangeability.
Kowa TE-9Z specifications for each spectra:
| Background | Background | Magnification | |
| 600/660 series | 1.9 - 1.0° | 20-60x | |
| 82SV | 1.8 - 0.95° | 20-63x |
Kowa TE-11WZ eyepiece data for each spectra:
| Latitude | Latitude (at 1000 m) | Magnification | |
| 77x series | 1.32 - 2.4° | 42- 34 m | 25x-60x |
| 88x series | 1.32 - 2.4° | 42- 34 m | 25x-60x |