William Optics
William Optics Zenithstar 81 WIFD
William Optics Zenithstar 81 WIFD
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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.
- Lens Type
- Doublet APO Prime Lens
- Focal Length
- 559 mm
- Diameter
- 81 mm
- Focal Ratio
- f/6.9
- Image Circle
- 45 mm
- Focuser
- WIFD R&P Focuser Compatible with EAF
- Focuser Travel
- 0-77 mm (Ruler to 90mm)
- Adapter Included
- M92 Rotator M92 → M63 Adapter
- Optional Flattener
- FLAT 6AIII 0.8x
- Camera Format
- Full Frame APS-C M4/3
- Dovetail Type
- Vixen ↔︎ Arca-Swiss
- Tube Length
- 526 mm - 607 mm
- OTA Weight
- 3.55 kg / 7.82 lbs
- Total Weight
- 4.56 kg / 10.05 lbs
What's in the box
Main Tube
Bahtinov Cap
M92→M63 Adapter
Dual-side Plate
Mounting Ring & Handle bar
Soft Carry Case
Allen Key Set
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Research It
Find the product you want.
Talk to Us
Get expert guidance fast.
We Source It
Delivered within 4 weeks.
Enjoy It
Be happy with your gear.
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what we get asked most often
Are the prices all-inclusive?
Yes. The price you see is the price you'll pay. All taxes are included. Free shipping on all orders.
What's the stock status of the products on your site?
We list only in-stock items on our website that can be shipped right away. Sold out products are out of stock, so you can't place an order.
Selected products are available for Preorder, with a guaranteed delivery within 30 days or your money back.
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We process and ship all orders within two business days. Shipping time is determined by the speed of the shipping partner.
Is there a guarantee on your products?
Yes. On top of the manufacturer's warranty, we also offer a Replacement Guarantee on all online orders. In the event that the product is defective or damaged during shipping, you will receive a replacement.
Can I cancel my order?
We'll refund you 90% if you cancel before dispatch. Cancellations after dispatch are complicated. Take a look at the our Policy here
What's your return policy?
We have strict return/refund policies as a company that deals with fragile products. Casual returns are not permitted. Items that are not damaged in transit or defective cannot be returned.So please take a moment to review our Refund Policy.
Could I order something that's out of stock or not listed?
If you are interested in ordering an out-of-stock item, click the "notify me" button. You will be notified when the item is back in stock.
To source a specific product for you, our team needs more information. Specific orders will be subject to case-by-case terms and conditions.
