William Optics Telescopes & Accessories
William Optics makes quality refractor telescopes and equipment for all skill levels. Learn more about William Optics, or read our William Optics Telescopes Buying Guide.
- William Optics Extension Bar for iOptron SkyGuider Pro Mount - RedOur Price: $34.00In StockFree US Shipping
- William Optics High Latitude Vixen-style Base Mount & Extension Bar for iOptron Skyguider Pr...Our Price: $240.00In StockFree US Shipping
- William Optics Low Latitude Vixen-style Base Mount & Extension Bar for iOptron Skyguider Pro...Our Price: $240.00In StockFree US Shipping
- William Optics Cat Saddle Handle Bar for Redcat / Spacecat 51 Telescope - Red # M-HCRC-RDOur Price: $53.00In StockFree US Shipping
- William Optics Black Mounting Ring with Red Handle/Saddle Bar for SpaceCatOur Price: $87.00In StockFree US Shipping
- William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for RefractorsOur Price: $158.00In StockFree US Shipping
- William Optics 32mm f/3.75 UniGuide Guidescope with Slide-Base - Available in 4 ColorsFrom Our Price: $114.00Free US Shipping
- William Optics 48mm Wide T-Ring for Canon SLR/DSLR EOS Cameras - Black # TM-CN-EOS-M48Our Price: $34.00In StockFree US Shipping
- William Optics 90mm Saddle Plate for Vixen-Style Dovetail Rails - Red # SP90-RDOur Price: $66.00In StockFree US Shipping
- William Optics iOptron Skyguider Pro Dec Adapter and Vixen Style Clamp # M-IOPSG-SPM+M-SP90RDOur Price: $90.00In StockFree US Shipping
- William Optics Vixen Style Mount for iOptron SkyGuider Pro & Sky-Watcher Star Adventurer - H...Our Price: $229.00In StockFree US Shipping
- William Optics All New 0.8x Reducer / Adjustable Field Flattener 6AIII for GT71, GT81, Z81 &...Our Price: $229.00In StockFree US Shipping
- William Optics ZenithStar 81mm f/6.9 Doublet Apo Refractor with Soft Case & Flat6AIII Field ...Our Price: $1,030.00Out of StockFree US Shipping
- SpecialWilliam Optics GT71 71mm f/5.9 Apo Refractor (Red) with Soft Case & Flat6AIII Field Flattene...Our Price: $1,065.00In StockFree Contiguous US Shipping
- William Optics iOptron Skyguider Pro Dec Adapter # M-IOPSG-SPMOur Price: $34.00In StockFree US Shipping
- William Optics 1.25" Binoviewer Package (with 1.25" Wide Angle Eyepieces and 1.6x Barlow)Our Price: $310.00In StockFree US Shipping
- William Optics Red Dot Finder with Quick Release Bracket # M-RDF-P-VBOur Price: $85.00In StockFree US Shipping
- William Optics 120mm Saddle Handle Bar with 50mm Clamping Guiding Rings # M-HC120BL-GR50IISLOur Price: $97.00Out of StockFree US Shipping
- William Optics 48mm Wide T-Ring for Nikon F-Mount SLR/DSLR Cameras - Black # TM-NK-F-M48Our Price: $34.00Out of StockFree US Shipping
- William Optics Dual-Sided Vixen/Arca Swiss 210mm (8.3") Dovetail Plate - Red # M-PRC210RDOur Price: $45.00In StockFree US Shipping
- William Optics All New 50mm UniGuide Scope with Slide-base - Red # M-G50PB-WROur Price: $171.00In StockFree US Shipping
- William Optics Adjustable Field Flattener 61A for Z61 Telescope # P-FLAT61AOur Price: $229.00Out of StockFree US Shipping
- William Optics 2" to 1.25" RotoLock Eyepiece Adapter - Red # F-ROTO-A2-125RDIIOur Price: $53.00In StockFree US Shipping
- William Optics 1.25" 45-deg Erecting Prism Diagonal # D-EP125Our Price: $92.00In StockFree US Shipping
About William Optics Telescopes & Accessories
William Optics is a Taiwanese telescope and accessories company founded in 1996 by amateur astronomer William Yang. His goal was simple: to create affordable, top quality refractor telescopes for everyone.
William has absolutely accomplished his goal, and now has a number of very popular refractor telescope lines. These include entry-level refractors like the Zenithstar series all the way up to top-of-the-line Fluorostar series. Some of William Optics’ most well-known telescopes include:
- William Optics RedCat 51
- William Optics RedCat 71
- William Optics Zenithstar 61
- William Optics Zenithstar 73
- William Optics GT81
- plus many more
The telescopes William and his team produce are especially popular for widefield and deep sky astrophotography. Many of these refractors are made with high quality components, glass, and optical performance.
The company also makes a wide variety of accessories for both visual astronomy and astrophotography, including eyepieces, diagonals, t-rings, field flatteners, reducer/flatteners, focusers, rotators, Bahtinov masks, and more. It’s truly hard to go wrong with a telescope or accessory made by William Optics.
The company is sometimes mistakenly called misnomers such as Williams Optics and William Optic, but their true name is William Optics.