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WILLIAM OPTICS ZENITHSTAR 81 WIFD
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.
Technical Specification
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+)
Camera Format Compatibility
Full Frame and Larger
Focuser
WIFD (WO Internal Focus Design), EAF-Compatible
Optional Flattener
FLAT 6AIII (0.8x Reducer/Flattener)
T-Mount Compatibility
Canon EF, Canon RF, Nikon F, Nikon Z,
Sony E, Pentax K, FUJI X, MFT (Micro Four Thirds)
Adapters
Not Applicable
Tube Length
Adjustable: 526 mm – 607 mm
OTA Weight
3.55 kg (7.82 lbs)
Total Weight
4.56 kg (10.05 lbs)
REVIEW of WILLIAM OPTICS ZENITHSTAR 81 WIFD 👇
BRAND
William Optics
APERTURE(MM)
81
FOCAL LENGTH
Between 500mm to 1000mm Focal Length
FOCAL LENGTH(MM)
559
COUNTRY OF ORIGIN
Taiwan
FOCAL RATIO FN
6.9
ITEM CONDITION
New
MANUFACTURER
William Optics
PRODUCT GTYPE
Telescope
SAFETY WARNINGS
Never Look at Sun without Safety Solar Glasses
TYPE SOLAR
Yes
WARRANTY
2 Years Limited Warranty
OPTICAL DESIGN
Achromatic Refractor
APERTURE
Between 70mm to 100mm Aperture
VORION TEAM PICK
Yes
IN THE BOX
Zenithstar 81 | Bahtinov Cap | M92 to M63 Adapter | Dual Mounting Plate | Mounting Rings Handle Bar | Soft Carry Case | Allen Key Set