William Optics miniCat 51 WIFD (NEW 2024 Version) + FREE Lens Pen + FREE International Shipping US$1,014.16 US$988.42
NEW 2024 version of the popular miniCat 51 APO Free International Shipping! Available in limited quantity, Accepting order now! Please contact for the shipping schedule. Please take note that unlike previous...
William Optics RedCat 61 WIFD 300mm f/4.9 APO + FREE International Shipping US$1,683.40 US$1,657.66
Highlights of the RedCat 61 WIFD APO 4 elements Petzval flat field design with FPL-53 optics WO Internal Focus Design (WIFD), compatible with motorised focuser Fast focal ratio f/4.9 Full frame coverage...
William Optics SpaceCat 61 Limited Edition 2023 + FREE International Shipping US$1,786.36 US$1,747.75
Highlights of the SpaceCat 61 WIFD APO 4 elements Petzval flat field design with FPL-53 optics WO Internal Focus Design (WIFD), compatible with motorised focuser Fast focal ratio f/4.9 Full frame coverage...
William Optics RedCat 51 (NEW 2023 Version) + FREE International Shipping US$911.20 US$885.46
NEW 2023 version of the popular RedCat 51 APO Free International Shipping! Available in limited quantity, Accepting order now! Please contact for the shipping schedule. Please take note that unlike previous versions...
William Optics RedCat 51 (NEW 2022 Version) + FREE International Shipping
NEW 2022 version of the popular RedCat 51 APO Free International Shipping! Available in limited quantity, Accepting order now! Please contact for the shipping schedule. Highlights of the RedCat 51-II...
2022 NEW Release: William Optics FLT-120 Triplet APO Refractor + International Free Shipping US$3,716.86 US$3,459.46
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William Optics FLT-132 2021 with 3.5" Feather Touch & Rotolock US$5,351.35
WO FLT-132 III with FeatherTouch Focuser: Now accepting orders! 132mm f/7 apochromatic refractor. The FLT132 represents William Optics' top of the line apochromatic designed for visual observation and astrophotography. The...
2021 NEW Release: William Optics Zenithstar 73-III f/5.9 APO (Free Soft Carrying Bag) US$769.63
ZenithStar 73-III comes with new rising blocks underneath the mounting rings for added clearance Now comes with FREE WO patented Diffraction Spikes Bahtinov Mask Cap Zenithstar 73-III is a greatly versatile and...
2021 NEW William Optics FLT-132 III Triplet APO with 3.3" R&P Focuser US$4,370.65
Specifications Aperture 132mm Focal Ratio F/7 Focal Length 925mm Objective Type 3 elements, Air-spaced, FPL-53 Resolving Power 0.86" Limiting...
2021 NEW Release: William Optics FLT-91 f/5.9 APO + FREE International Shipping US$2,236.81 US$2,108.11
Accepting order now, limited quantity available! **Free International Shipping to most locations ** Available in space grey, red and gold Recommended Accessories: WO Flat6A-III 0.8x reducer flattener Flat6A-III...
William Optics Zenithstar 73-II f/5.9 APO (Free Soft Carrying Bag)
New version ZenithStar 73-III available now! Now comes with FREE WO patented Diffraction Spikes Bahtinov Mask Cap Zenithstar 73 is a greatly versatile and portable refractor telescope for beginners and...
William Optics Gran Turismo GT81 IV (NEW Model) + FREE International Shipping US$1,606.18
Innovative Bahtinov Mask Cover (Patented) & New Dovetail Plate included! The new 2020 GT81 three-element super APO offer superb quality for imaging and visual use at an affordable priceļ¼From the pristine white finish on...
William Optics Gran Turismo GT81 III
GT81 Latest & Most Current Version: GT81-IV Innovative Bahtinov Mask Cover (Patented) & New Dovetail Plate included! The new 2019 GT81 three-element super APO offer superb quality for imaging and visual use at...
William Optics RedCat 51 (Upgraded Version) + FREE International Shipping
NEW 2022 RedCat 51 II available here Highlights of the RedCat 51 APO (Upgraded Version) 4 elements Petzval flat field design with FPL-53 optics Fast focal ratio f/4.9 Full frame coverage Interchangeable...
William Optics Zenithstar 81 f/6.9 APO US$984.56
Now comes with FREE WO patented Diffraction Spikes Bahtinov Mask Cap Zenithstar 81 is a greatly versatile and portable refractor telescope for beginners and veterans alike. Designed for both astrophotography and...
William Optics SpaceCat 51 Limited Edition (Discontinued)
Space grey colour discontinued. RedCat 51 is available~ Click here to order it now! Highlights of the SpaceCat 51 APO 4 elements Petzval flat field design with FPL-53 optics Fast focal ratio f/4.9 Full frame...
William Optics GT102 with 3.3" R&P Focuser (New Edition) US$2,339.77
GT102 2020 Package Includes GT102 three element design with center FPL-53 and other ED element glass (air spaced) All-new 3.3" R & P Focuser with 2 speed knobs 1:10 Mounting rings Innovative Bahtinov Mask...
William Optics RedCat 51
Succeeded by the RedCat 51 Upgraded Version and SpaceCat...
William Optics Star 71-II f/4.9 APO Astrograph with Bahtinov Mask Cap
William Optics Star 71-II is the successor to the well-aclaimed Star 71 imaging APO. Star 71-II is a f/4.9 air-spaced 4-element FPL-53 apochromatic refractor. Star 71-II's 45mm image circle is large enough to cover your 35mm...
William Optics GT71 71mm f/5.9 Triplet APO Imaging Package + FREE International Shipping US$1,079.79
William Optics GT71 APO is a f/5.9 air-spaced triplet FPL-53 apochromat. This package includes a 0.8x Flat6A-III reducer cum flattener specially designed for GT71 to transform it into a f/4.7 imaging APO covering full frame...
William Optics FLT-132 2018 with 3.5" Feather Touch & Rotolock
New 2021 version available here: William Optics FLT-132 2021 with 3.5" Feather Touch & Rotolock 132mm f/7 apochromatic refractor. Perhaps the best 5 inch apochromatic refractor under US$4,000. The FLT-132...
William Optics Zenithstar 126 f/7.7 APO
New 2018 Super ZenithStar 126 F7.7 imaging APO (Innovative Bahtinov Mask Cover (Patented) included !!) We are very exciting to announce New 2018 Super ZenithStar 126 F7.7 imaging APO!!! Innovative...
William Optics FLT-132 2018
NEW 2021 version available here: William Optics FLT-132 III Triplet APO with 3.3" R&P Focuser Special 20th Anniversary Offer 132mm f/7 apochromatic refractor. Perhaps the best 5 inch apochromatic refractor under...
William Optics Zenithstar 61 f/5.9 APO (with Mask Cover)
NEW 2nd Generation ZenithStar 61-II is now released! Available in red, gold and new colour space grey! Click Here... Zenithstar 61 is a greatly versatile and portable refractor telescope for beginners and veterans...
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