OTA · MSRP $1,998
William Optics Gran-Turismo 81 WIFD
Key specifications
| Aperture | 81 mm |
|---|---|
| Focal length | 478 mm |
| Focal ratio | f/5.9 |
| Optical design | Triplet APO |
| Weight | 3.58 kg |
All specifications
| Focuser type | WIFD rack-and-pinion, EAF compatible, 0-75 mm travel |
|---|---|
| Tube length | 420 mm |
| Dovetail | Vixen |
About
An 81 mm f/5.9 triplet APO refractor covering a 45 mm image circle, on the WIFD rack-and-pinion focuser with 75 mm of travel and an M92 rotator. Carries a dovetail that works as both Vixen and Arca-Swiss, and takes the FLAT GT, FLAT 6AIII or FLAT 68III flatteners.