The GranTurismo 81 IV: the same triplet, the most competitive price
This performance of the William Optics GranTurismo 81 IV Delivers exactly the same FPL-53 triplet optics and lens size as the gold and red variants, for the best price of the three. Clear and sharp image without color errors, with the Moon, planets and fine star fields; you don't need to be an experienced photographer to get immediate results from it.
Everything in the box, start right away
The 81 mm triplet at 478 mm focal length (f/5.9) combines image quality with travel weight. The Vixen falcon-tail, handle, Bahtinov mask and the 2 to 1.25 inch adapter are included as standard, along with the soft carrying case. Only the color of the finish differs from the Gold and Red versions.
In the box
- Optical tube GranTurismo 81/478 IV triplet
- Vixen-Style dovetail
- Handle
- Bahtinov mask
- 2 inch to 1.25 inch adapter
- Soft carrier bag
Featured accessories
The William Optics Flat GT flattener (329 euro) flattens the field to full-frame; the UniGuide 32 mm guidescope (159 euro) enables long exposures.
For whom yes, for whom no
On the other hand: anyone who wants the GT81 triplet and saves 100 euros on the Gold and Red versions. Not: anyone who is looking for an internal focus lens and rotator; that is the domain of the GT81 WIFD.
Specifications
| Optical design | Apochromat, FPL-53 triplet |
| Opening | 81 millimeters |
| Focal length | 478 mm |
| Opening ratio | f/5,9 |
| Focus assist | Bahtinov mask |
| Attachment | Vixen-style dovetail with handle |
| Execution | OTA (loose tube) |
Unsure about the right tube for your camera and mount? The telescope selection aid helps you choose. Also view all Refracting telescopes and the full range of William Optics.
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