OTA
William Optics Gran-Turismo 71 · 20th Anniversary Limited Edition
William Optics · Gran-Turismo 71 · 20th Anniversary Limited Edition · 71mm triplet APO refractor telescope
Key specifications
| Aperture | 71 mm |
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| Focal length | 420 mm |
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| Focal ratio | f/5.9 |
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| Optical design | Triplet APO |
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| Weight | 2.06 kg |
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All specifications
| Focuser type | 2.5 inch V-Power Crayford, zero image shift, 45 mm travel |
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| Tube length | 325 mm |
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| Dovetail | Vixen |
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About
A 71 mm f/5.9 triplet APO refractor covering a 40 mm image circle, on a 2.5-inch V-Power Crayford zero-image-shift focuser with 45 mm of travel and a Vixen dovetail. A gold-finished 20th anniversary edition, now discontinued.