ZenithStar 81 WIFD in striking red
The William Optics ZenithStar 81 WIFD Red is the red version of the 81 mm FPL-53 apochromat with internal focuser. Light and compact for use on a star tracker or lightweight equatorial mount, with the image scale to seriously capture nebulae and galaxies.
Color-corrected and sag-resistant
The FPL-53 doublet delivers a sharp, color-pure image at 559 mm focal length (f/6.9). The internal WIFD focuser keeps the balance constant and carries heavy camera trains without shifting. Bahtinov mask, adapters, and handle are included as standard in the box.
In the box
- ZenithStar 81/559 optical tube with WIFD focuser, red version
- Tube Rings
- Arca-Swiss and Vixen-Style dovetail
- Handle
- Bahtinov mask
- Adapters
- Soft carrier bag
Featured accessories
The William Optics Flat6A III Adjustable Flattener-Reducer (289 euros) flattens the field to full-frame; the UniGuide 32mm guidescope (159 euros) enables long exposures.
For whom yes, for whom no
Pro: astrophotographers who want the ZenithStar 81 WIFD in the classic red William Optics color. Con: those who choose based on price; the gold version has the exact same optics and scope of delivery for 200 euros less.
Specifications
| Optical design | Apochromat, FPL-53 doublet |
| Opening | 81 millimeters |
| Focal length | 559 mm |
| Opening ratio | f/6,9 |
| Focuser | WIFD (intern) |
| Focus assist | Bahtinov mask |
| Attachment | Mounting rings with Arca-Swiss and Vixen-Style dovetail and handle |
| Execution | OTA (loose tube), Red |
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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