OTA · 1995–2004
Orion ShortTube 90 (original)
Key specifications
| Aperture | 90 mm |
|---|---|
| Focal length | 500 mm |
| Focal ratio | f/5.6 |
| Optical design | Achromatic Refractor |
| Weight | 2.3 kg |
All specifications
| Focuser type | 1.25" rack-and-pinion |
|---|
About
1990s 90mm f/5.6 short-tube achromatic refractor; wide-field grab-and-go.