William Optics

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William Optics William Optics Image Plane Tilt Adjuster (for RedCat 51 Upgrade)
This tilt adjuster is mainly designed for some cameras that have a tilted sensor which needs to be adjusted.
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William Optics Image Plane Tilt Adjuster (for RedCat 51 Upgrade)
$60.00
William Optics William Optics Bahtinov Mask for 172mm-235mm Dew Shields
The William Optics Bahtinov Mask is made from a sheet of optical acrylic and provides diffraction spikes that are about three times brighter than those created by the standard Bahtinov masks
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William Optics Bahtinov Mask for 172mm-235mm Dew Shields
$88.00
William Optics William Optics x0.72 Reducer Flattener 8 - P-FLAT8
This revolutionary new WO x0.72 Reducer flattener it’s Adjustable was made for 6 -7.8 F ratio refractors.
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William Optics x0.72 Reducer Flattener 8 - P-FLAT8
$968.00
William Optics William Optics Binoviewer Complete Package
William Optics does it better and especially cheaper! Until today, you could choose only between high-end expensive binoviewers or monocular eyepiece observation.
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William Optics Binoviewer Complete Package
$369.00
William Optics William Optics Ultra-Cat 131
Designed for serious astrophotographers and observatories alike, the Ultra-Cat 131 combines a fast focal ratio with uncompromising optical precision, enabling stunning deep-sky detail, rich contrast, and immersive wide-field compositions.
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William Optics Ultra-Cat 131
$5,398.00
William Optics RedCat Ed. AM3 head + tripod
William Optics RedCat edition AM3 head and TC40 Carbon Fiber Tripod 2-part bundle
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RedCat Ed. AM3 head + tripod
$2,598.00
William Optics William Optics ZWO EAFN & EAF Pro Mounting Bracket
ZWO EAF Mounting Bracket
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William Optics ZWO EAFN & EAF Pro Mounting Bracket
$129.00
William Optics William Optics M48 Filter Adapters for Cat Eyes Binoculars
Dual filter adapters for Cat Eyes Binoculars
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William Optics M48 Filter Adapters for Cat Eyes Binoculars
$9.00
William Optics William Optics Bahtinov Mask Cover for WO Telescopes
Achieve razor-sharp focus on stars, planets, and deep-sky targets
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William Optics Bahtinov Mask Cover for WO Telescopes
$118.00
William Optics William Optics Losmandy-style Dovetail Plate
William Optics William Optics Losmandy-style Dovetail Plate
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William Optics Losmandy-style Dovetail Plate
$139.00
William Optics William Optics Handle Bar for CAT 51
Synta Dovetail Handle Bar for Cat Series Telescopes
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William Optics Handle Bar for CAT 51
$60.00
William Optics William Optics 2" → 1.25" RotoLock Visual Back Adapter
RotoLock 1.25 reducer for William Optics telescopes
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William Optics 2" → 1.25" RotoLock Visual Back Adapter
$58.00
William Optics William Optics UniGuide 32mm Guidescope
32mm guide scope with built in synta dovetail.
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William Optics UniGuide 32mm Guidescope
$137.00
William Optics William Optics GuideStar 61 APO Telescope
A lightweight doublet APO useful for imaging and guiding alike.
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William Optics GuideStar 61 APO Telescope
$438.00
William Optics William Optics 50mm Guiding Scope w/ 1.25" RotoLock Focuser
50mm Guide Scope available in black or space gray
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William Optics 50mm Guiding Scope w/ 1.25" RotoLock Focuser
$178.00
William Optics William Optics Fluorostar 120 f/6.5 Triplet Refractor
An excellent apochromatic triplet telescope.
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William Optics Fluorostar 120 f/6.5 Triplet Refractor
$3,598.00
William Optics Willam Optics GT81 with Internal Focus Design (WIFD) Apochromatic Series
A Triplet Apochromatic Prime Lens with Internal Focuser
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Willam Optics GT81 with Internal Focus Design (WIFD) Apochromatic Series
$2,198.00
William Optics William Optics Gran Turismo 81 IV APO Refractor
A Beautiful Triplet Apochromatic Prime Lens
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William Optics Gran Turismo 81 IV APO Refractor
$1,798.00
William Optics William Optics ZenithStar 81 WIFD Telescope (Gold)
A Powerful Doublet Apochromatic Prime Lens
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William Optics ZenithStar 81 WIFD Telescope (Gold)
$1,098.00
William Optics William Optics WIFD Ultra-Cat 76 APO Refractor
For astrophotographers seeking precision and clarity, this 76mm Petzval refractor is a standout option.
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William Optics WIFD Ultra-Cat 76 APO Refractor
$2,198.00
William Optics William Optics Red Cat 91
William Optics William Optics Red Cat 91
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William Optics Red Cat 91
$2,998.00
William Optics William Optics 2x Barlow nosepiece for Binoviewer
A high-quality 2x Barlow nosepiece designed to increase magnification and achieve focus when using William Optics binoviewers.
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William Optics 2x Barlow nosepiece for Binoviewer
$59.00
William Optics William Optics Ultra-Cat 108 WIFD
Precision-engineered with premium materials and optics, the Ultra Cat 108 WIFD is an ideal choice for discerning astronomers and astrophotographers who demand excellence in their equipment.
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William Optics Ultra-Cat 108 WIFD
$3,998.00
William Optics William Optics Mini Cat 51 WIFD Refractor Telescope
A precision-engineered telescope designed for astrophotography enthusiasts
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William Optics Mini Cat 51 WIFD Refractor Telescope
$988.00