OTA · MSRP $1,568
William Optics Gran-Turismo 81 IV
Key specifications
| Aperture | 81 mm |
|---|---|
| Focal length | 478 mm |
| Focal ratio | f/5.9 |
| Optical design | Triplet APO |
| Weight | 3.9 kg |
All specifications
| Focuser type | 2.5 inch rack-and-pinion, EAF compatible, 93 mm travel |
|---|---|
| Tube length | 390 mm |
| Dovetail | Vixen |
About
An 81 mm f/5.9 triplet APO refractor covering a 45 mm image circle, on a 2.5-inch rack-and-pinion focuser with 93 mm of travel, an M63 rotator and a 2-inch to 1.25-inch visual back. Carries a dovetail that works as both Vixen and Arca-Swiss.