William Optics Gran Turismo 81 WIFD
AED 9,540.00
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William Optics Gran Turismo 81 WIFD: THE NEW GAMECHANGER
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Description
William Optics Gran Turismo 81 Internal Focus Design
Introducing the WILLIAM OPTICS Internal Focus Design (WIFD) Apochromatic Series. This innovative and revolutionary design combines a precision (Patented) internal focusing mechanism with the highest quality optics available, providing the ultimate Apochromatic refractor for astrophotography. Designed from the ground up with the ability to handle the newest generation of large, heavy, high-resolution cooled cameras, the rock-solid optical tube assembly is uncompromised in quality. The movement of the focuser is integrated inside the main tube assembly, so there are no movements of a focuser drawtube visible from the outside. The user can enjoy the benefits of a traditional two speed fine focuser, while not worrying about limitations typically found in traditional rear mounted focusers.
| GRAN TURISMO 81 WIFD Technical Specification | |
| Lens Type | Triplet Apochromatic Prime Lens |
| Focal Length | 478mm |
| Diameter | 81mm |
| F/ Ratio | f/5.9 |
| Optional Flattener | FLAT6AIII 0.8x FLAT68III 1.0X (Require WIFD Extension Adapter) |
| Focuser | WIFD Compatible with EAF |
| Lens Material | FPL-53 |
| Strehl Ratio | 0.95+ |
| Camera Format | Full Frame DSLR Mirrorless CMOS CCD |
| Test Report | Included |
| T-Mounts Supported | Canon EF, RF – Nikon F, Z – Sony E – Pentax K – Micro Four Thirds (M4/3) – FUJI X |
| OTA Weight | 7.3 lbs (3.3 kg) |
| Total Weight | 9.9 lbs (4.5 kgs) |
| Tube Length (Retracted) | 420mm |
| Tube Length (Extended) 5 | 500mm |
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