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William Optics

William Optics

(80 products)

William Optics Telescopes & Accessories

William Optics designs premium refractor telescopes and astrophotography accessories, including the renowned RedCat series of compact Petzval astrographs. Known for elegant design, excellent color correction, and flat-field performance, William Optics products are trusted by astrophotographers and visual observers alike.

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$3.80 off

William Optics
William Optics 48mm T mount for Fuji FX (TM-FJ-X-M48)

Sale price $72²⁰ Regular price $76⁰⁰

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William Optics
William Optics 1.25" inch RedCat Erecting Prism

Sale priceFrom $187¹⁵ Regular price $197⁰⁰

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William Optics
William Optics Mighty-Cat 71 (T-MC-71RD)

Sale price $3,322¹⁵ Regular price $3,497⁰⁰

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$84.90 off

William Optics
William Optics Pier Mount 90 (YG-PM-90R)

Sale price $1,613¹⁰ Regular price $1,698⁰⁰

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William Optics
William Optics M48 Filter Adapters for Cat Eyes Binoculars (AD-2X42-M48)

Sale price $14²⁵ Regular price $15⁰⁰

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$216.85 off

William Optics
William Optics Cat 91 WIFD 30th Anniversary Edition LIMITED QUANTITY (T-C-91-30)

Sale price $4,120¹⁵ Regular price $4,337⁰⁰

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$11.50 off

William Optics
William Optics Flat61 for ZenithStar 61 - USED (P-FLAT61A-U)

Sale price $218⁵⁰ Regular price $230⁰⁰

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William Optics
William Optics 1.25" 90° Erect Prism for Cat 61 WIFD (D-EP90-125-RC61)

Sale price $208⁰⁵ Regular price $219⁰⁰

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William Optics
William Optics Pleiades 181 APO F/5.5 WIFD (T-P-181RD)

Sale price $26,217¹⁵ Regular price $27,597⁰⁰

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William Optics
William Optics Super high precision COPPER T-mount for Nikon full frame (YE-TR-BR48-N)

Sale price $66⁵⁰ Regular price $70⁰⁰

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$142.50 off

William Optics
William Optics NEW Internal Focus Design Gran Turismo 81 WIFD + Flattener + Guide Scope (GT81-WIFD-AP)

Sale price $2,707⁵⁰ Regular price $2,850⁰⁰

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William Optics
William Optics ZenithStar 61II Doublet f/5.9

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Sale price $913⁹⁰ Regular price $962⁰⁰

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William Optics
William Optics iOptron Skyguider Pro Dec adapter & Vixen style Clamp

Sale price $154⁸⁵ Regular price $163⁰⁰

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William Optics
William Optics Gran Turismo 81 IV Triplet APO f/5.9

Sale price $2,356⁹⁵ Regular price $2,481⁰⁰

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William Optics
William Optics Gran Turismo 71 Triplet APO f/5.9 (A-F71GTII)

Sale price $1,439²⁵ Regular price $1,515⁰⁰

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Since 1988, Astronomy Plus has been a trusted Canadian source for telescopes, astrophotography equipment, and optics. We provide expert advice, quality products, and fast shipping across Canada.

📍3008 Brodeur West , Unit 307
St-Alphonse-de-Granby, Quebec, Canada
J0E 2A0

📞 450-463-5072 / 1-888-540-0444

✉️ info@astronomyplus.com

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Yosmany Castaneda

Excellent camera for "Lucky imaging" of planets

Excellent camera for "Lucky imaging" of planets.

ZWO ASI585MC USB3.0 Color Astronomy Camera - OPEN BOX (ASI585MC)

David W Vandenberg

Excellent Service

Products as described, arrived 3 days before due date.
This is a great deep sky scope, and I am looking forward to getting some great pictures with it, all I need now are some clear skies (it's raining at the moment)

SVBONY SV545 Petzval Astrograph 203mm Lens F/4.5 (W9317B)

Emilio Youssef

Very sturdy and better than

Very sturdy and better than expected!

Astronomy Plus Pier Extension for ZWO, iOptron and Sky-Watcher Mounts

Claude Lamarre

ASTRONOMIK MC CLEAR FILTER 2’’ SCT 24 TPI Se visse directement sur l’adaptateur 2’’ SCT 24 TPI

ASTRONOMIK MC CLEAR FILTER 2’’ SCT 24 TPI

Se visse directement sur l’adaptateur 2’’ SCT 24 TPI , votre dos visuel se visse sur le ASTRONOMIK MC CLEAR FILTER 2’’ SCT 24 TPI.

1) Permet de sceller le tube optique. Une touche de graisse de silicone pure, de qualité, celle pour les équipements de plongée assure l’étanchéité.

2) Empêche les contaminants de s’infiltrer

3) Empêche l’effet cheminée lorsqu’on change un oculaire ou un accessoire par temps froids.

4) Combiné à une isolation thermique de l'OTA un isolant thermique à double face genre REFLECTIX, permet de sortir l’instrument d’un local chauffé vers la température frigide extérieure pour observer immédiatement sans attendre l’équilibrage des températures.

J’ai testé de 25C à 5C, sur deux nuits à l’oculaire clavé 10mm dès l’installation 5 minutes après la sortie de l’instrument, l’image est absolument nette avec seulement la turbulence d’un seeing de 3-4, et ce durant toute la durée de la séance.

Images de Saturne au MK127 de SVBONY F:1500mm, Caméra ZWO ASI 678MC au foyer primaire, Filtre 1.25" Baader contrast boost, capture .SER, Sharpcap, PIPP, AS4!, registax 6.

Les photos sont un stack des images brutes stabilisé de PIPP, et l'autre un léger traitement dans Registax 6.

Le 27 octobre vers 21h30 5 à 10 minutes après avoir sorti l’instrument, viewing 3/5. Hier avec barlow QT 2,25x Baader, résultat similaire. C'est ce que j'espérait, les tests se poursuivre.

Astronomik MC-clear Filter

Darus

Helpful staff and competitive pricing make them a solid choice

Astronomy Plus is a reliable Canadian retailer specializing in telescopes and astrophotography gear.

Their product selection is excellent — everything from smart telescopes like the Seestar series to mounts, cameras, filters, and accessories from top brands. Items arrive in perfect condition and are well-stocked.

Shipping is impressively fast!

Astronomy Plus – Telescopes & Astrophotography Canada

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1918 reviews

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1151

Celestron SkySync GPS Accessory (93969)

Robert Larose

GPS simplifie la vie

Fonctionne immédiatement une fois qu’on sait qu’il faut activer avec la manette. À date aucun délai au démarrage sur plusieurs sessions.

ZWO ASI585MC USB3.0 Color Astronomy Camera - OPEN BOX (ASI585MC)

Yosmany Castaneda

Excellent camera for "Lucky imaging" of planets

Excellent camera for "Lucky imaging" of planets.

Celestron StarSense Explorer DX 102AZ Refractor (22460)

Alexandre Cyr

Très satisfait

Très bon outils pour amateur. Explication clair et rapide à monter. Personnel très sympathique aussi :-)

ZWO Seestar S50 Pro All-in-One APO Smart Telescope (S50PRO)

Bluespeck

Excellent service

Excellent service. Excellent product. Thanks Astronomy Plus!!

Astrozap Dust Covers for Telescopes, Dew Shields, Finders, Eyepieces and Binoculars

DVB

Clever tube end covers for my non-standard home-built 10" Newtonian

Clever tube end covers for my non-standard home-built 10" Newtonian. Kind of like shower caps, but they are of heavy-duty material. I haven't yet tested them to see if they will keep out enough light to shoot dark flats, but I think they will be.