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Explore the universe with the William Optics ZenithStar 81 WIFD, a premium refractor telescope that offers unparalleled optical precision with its innovative Internal Focus Design (WIFD). Perfect for astrophotography and visual observations, it features a patented internal focusing mechanism that keeps optics perfectly aligned, even with heavy cameras.
Available in vibrant red or elegant gold, the ZenithStar 81 WIFD boasts a compact and durable build. Enhance your viewing with optional accessories like the Flat6aIII, a 0.8x reducer for broader celestial views, and the 50mm Uniguider for improved tracking accuracy during long exposures.
With its refined internal focuser, this telescope provides smooth, precise adjustments for consistently sharp images. Whether capturing distant galaxies or observing planetary details, the ZenithStar 81 WIFD is an excellent choice for serious astronomers.
| Parameter | Value |
|---|---|
| Lens Type | Doublet Apochromatic Prime Lens |
| Lens Material | FPL-53 ED Glass |
| Aperture | 81 mm |
| Focal Length | 559 mm |
| Focal Ratio | f/6.9 |
| Image Circle | 45 mm (Full Frame+) |
| Focus Travel | 0-77 mm (Ruler to 90mm) |
| Focuser | WIFD (WO Internal Focus Design), EAF-Compatible |
| Optional Flattener | FLAT 6AIII (0.8x Reducer/Flattener) |
| Camera Format | Full Frame APS-C M4/3 |
| Adapter Included | M92 Rotator M92 → M63 Adapter |
| Tube Length | Adjustable: 526 mm – 607 mm |
| OTA Weight | 3.55 kg (7.82 lbs) |
| Total Weight | 4.56 kg (10.05 lbs) |
| Dovetail Type | Vixen ↔︎ Arca-Swiss |
Reflector Telescopes | Shop at Vorion Scientific India" style="height:300px;object-fit: cover;">
