OTA
William Optics Zenithstar 73 III
William Optics · Zenithstar 73 III · 73mm ED doublet refractor telescope
Key specifications
| Aperture | 73 mm |
|---|
| Focal length | 430 mm |
|---|
| Focal ratio | f/5.9 |
|---|
| Optical design | ED Doublet |
|---|
| Weight | 2.83 kg |
|---|
All specifications
| Focuser type | 2 inch rack-and-pinion, EAF compatible |
|---|
| Tube length | 330 mm |
|---|
| Dovetail | Vixen |
|---|
About
A 73 mm f/5.9 doublet APO refractor covering a 45 mm image circle, on a 2-inch rack-and-pinion focuser with an M63 output and 2-inch and 1.25-inch visual backs supplied. Carries a dovetail that works as both Vixen and Arca-Swiss. Now discontinued.