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 Dual-Sided Vixen/Arca Swiss 110mm (4.3") Dovetail Plate - Space Gray # M-PRC1...Our Price: $36.00Out of StockFree US Shipping
- William Optics 2" Push-In Nosepiece with M63 Female Threads for P-FLAT6AIII FlattenerOur Price: $44.00In StockFree US Shipping
- William Optics High Precision Copper 48mm Wide T-Ring for Canon EOS Cameras # YE-TR-BR48-COur Price: $90.00In StockFree US Shipping
- William Optics ZenithStar 81mm f/6.9 Doublet Apo Refractor with Soft Case - Gold # Z81GDOur Price: $888.00Out of StockFree US Shipping
- William Optics Diffraction Spikes Bahtinov Focusing Mask - For Telescope Tube/Dewshield Diam...Our Price: $79.00In StockFree US Shipping
- DiscontinuedWilliam Optics Adjustable 0.8x Reducer / Field Flattener 73R for Z73 Telescope # P-FLAT73ROur Price: $284.00Out of StockFree US Shipping
- William Optics Dual-Sided Vixen/Arca Swiss 110mm (4.3") Dovetail Plate - Gold # M-PRC110GDOur Price: $36.00In StockFree US Shipping
- William Optics M80-to-M48 Adapter to Use Flat68III w/ FLT91 or Flat 7A w/ FLT120 Telescope #...Our Price: $49.00In StockFree US Shipping
- William Optics GT71 71mm f/5.9 Apo Refractor Telescope with Soft Case - Red # A-F71GTIIRDOur Price: $933.00In StockFree Contiguous US Shipping
- William Optics Swan Dovetail Plate for Losmandy Stye Saddle: 400mm (15.7") Length - Space Gr...Our Price: $116.00In StockFree US Shipping
- SpecialWilliam Optics GT81 81mm f/5.9 Apo Refractor with Soft Case - Available in three colors # A-...From Our Price: $1,568.00Free US Shipping
- William Optics FLT 91 Fluorostar 91mm f/5.9 Triplet Apo Refractor with Carry Case - Red # T-...Our Price: $1,998.00In StockFree Contiguous US Shipping
- William Optics High Precision Copper 48mm Wide T-Ring for Nikon Cameras # YE-TR-BR48-NOur Price: $90.00In StockFree US Shipping
- William Optics 48mm Wide Micro 4/3 T-Ring for Olympus Cameras - Black # TM-MFT-M48Our Price: $45.00In StockFree US Shipping
- William Optics Soft Carry Case for Z71, Star71, GT71 and Z73 Telescopes # BG1-P004Our Price: $68.00In StockFree US Shipping
- William Optics 0.8x Reducer / Field Flattener 7A # P-FLAT7AOur Price: $691.00In StockFree US Shipping
- DiscontinuedWilliam Optics Soft Carry Case for Z81 / GT81 / GTF81 TelescopesOur Price: $67.00Out of StockFree US Shipping
- William Optics 1.25" 66° Wide Angle Eyepiece - 20mmOur Price: $55.00 As low as $47.00Out of StockFree US Shipping
- William Optics 48mm Wide T-Ring for Fuji X Cameras - Black # TM-FJ-X-M48Our Price: $45.00In StockFree US Shipping
- William Optics Image Plane Tilt Adjuster for 1st Gen RedCat51 # M-FD-RC51Our Price: $50.00In StockFree US Shipping
- William Optics FLT 120 Fluorostar 120mm f/6.5 Triplet Apo Refractor with Carry Case - Availa...From Our Price: $3,298.00Free Contiguous US Shipping
- William Optics 0.72x Reducer / Adjustable Field Flattener 8 for GT153, FLT 132 & 102GTS # P-...Our Price: $806.00In 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.