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Refractors

Réfracteurs

Refractors earn their following through consistency. A sealed lens system holds collimation indefinitely, cools quickly, gives high-contrast views without a central obstruction, and — in modern apochromatic form — produces the clean, round stars that make wide-field astrophotography look effortless. David Astro carries refractors in Canada, from compact 50 mm travel astrographs to large apochromatic triplets, shipping from Canadian stock.

We image with refractors under Canadian skies and can speak to the practical differences between doublets and triplets, and between glass types, in terms of what actually shows in a finished image rather than what appears on a specification sheet.

Filtres

Explore Scientific Explore FirstLight 80mm CF Telescope Go-To Tracker Combo with Solar Filter
CA$700.00 - CA$700.00
CA$700.00
CA$700.00 - CA$700.00
CA$700.00

Explore Scientific Explore FirstLight 80mm CF Telescope Go-To Tracker Combo with Solar Filter

ES-FLAR80640CF-IEXOS

80mm Refractor Telescope Lightweight Carbon Fiber Optical Tube iEXOS-100 PMC-Eight GoTo Equatorial Mount Includes Professional-Grade Solar Filter ...

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CA$700.00 - CA$700.00
CA$700.00
CA$700.00 - CA$700.00
CA$700.00
Explore Scientific Explore FirstLight 80mm CF Telescope with Solar Filter
CA$196.00 - CA$196.00
CA$196.00
CA$196.00 - CA$196.00
CA$196.00

Explore Scientific Explore FirstLight 80mm CF Telescope with Solar Filter

ES-FL-80640OTA-CF

80mm Achromatic Refractor Professional-Grade Solarlite Solar Filter Included 25mm Plössl Eyepiece and 90° Diagonal Smartphone and DSLR Camera Adap...

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CA$196.00 - CA$196.00
CA$196.00
CA$196.00 - CA$196.00
CA$196.00
CA$3,499.99 - CA$3,499.99
CA$3,499.99
CA$3,499.99 - CA$3,499.99
CA$3,499.99

Explore Scientific ED127-FCD100 f/7.5 Réfracteur Triplet APO

ES-FCD100-127075-02

Révélez des merveilles célestes comme la beauté désolée du terrain lunaire, la structure sereine des anneaux de Saturne ou les trésors du ciel pro...

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CA$3,499.99 - CA$3,499.99
CA$3,499.99
CA$3,499.99 - CA$3,499.99
CA$3,499.99
CA$3,919.99 - CA$3,919.99
CA$3,919.99
CA$3,919.99 - CA$3,919.99
CA$3,919.99

Explore Scientific ED127-FCD100 f/7.5 Réfracteur Triplet APO - Fibre de Carbone

ES-FCD100-127075-CF-01

Révélez des merveilles célestes comme la beauté désolée du terrain lunaire, la structure sereine des anneaux de Saturne ou les trésors les plus bri...

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CA$3,919.99 - CA$3,919.99
CA$3,919.99
CA$3,919.99 - CA$3,919.99
CA$3,919.99
Explore Scientific Galileoscope Refractor Telescope STEM Kit
CA$35.00 - CA$35.00
CA$35.00
CA$35.00 - CA$35.00
CA$35.00

Explore Scientific Galileoscope Refractor Telescope STEM Kit

ES-GSCOPE

Hands-On Telescope Assembly: Build a functional refractor telescope from the ground up. No Tools Required: All components snap together in minut...

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CA$35.00 - CA$35.00
CA$35.00
CA$35.00 - CA$35.00
CA$35.00
Explore Scientific Sidara Essential 102 Refractor Telescope
CA$700.00 - CA$700.00
CA$700.00
CA$700.00 - CA$700.00
CA$700.00

Explore Scientific Sidara Essential 102 Refractor Telescope

ES-AR102660-MAZ01-ST10

102mm Refractor Optical Tube Alt-Azimuth Mount with Slow-Motion Controls Dual-Axis Tracking Capability SkyAssist Guided Navigation Compatibility ...

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CA$700.00 - CA$700.00
CA$700.00
CA$700.00 - CA$700.00
CA$700.00
Explore Scientific Sidara Nano 90 Telescope System
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00

Explore Scientific Sidara Nano 90 Telescope System

ES-AR90700-MAZ-NANO

Refractor Optical Design Compact Alt-Azimuth Mount Slow-Motion Controls for Smooth Tracking SkyAssist Navigation Compatibility Optimized for Lunar...

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CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00
Explore Scientific Sidara Plus 127 Refractor Telescope
CA$1,260.00 - CA$1,260.00
CA$1,260.00
CA$1,260.00 - CA$1,260.00
CA$1,260.00

Explore Scientific Sidara Plus 127 Refractor Telescope

ES-AR127820-MAZ01

127mm (5-inch) Refractor Optics 820mm Focal Length Lightweight Nano Alt-Azimuth Mount Dual-Axis Slow-Motion Controls SkyAssist Digital Guidance Co...

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CA$1,260.00 - CA$1,260.00
CA$1,260.00
CA$1,260.00 - CA$1,260.00
CA$1,260.00
Explore Scientific Sidara Pro 102 Telescope System
CA$1,120.00 - CA$1,120.00
CA$1,120.00
CA$1,120.00 - CA$1,120.00
CA$1,120.00

Explore Scientific Sidara Pro 102 Telescope System

ES-AR102660-SAGT-ST10

102mm Refractor Telescope Sidara Pro GoTo Mount SkyAssist Guided Navigation System Designed for Visual Astronomy Suitable for Planetary & Deep...

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CA$1,120.00 - CA$1,120.00
CA$1,120.00
CA$1,120.00 - CA$1,120.00
CA$1,120.00
Explore Scientific Sidara Pro 80
CA$840.00 - CA$840.00
CA$840.00
CA$840.00 - CA$840.00
CA$840.00

Explore Scientific Sidara Pro 80

ES-AR80900-SAGT-ST10

80mm Refractor Telescope Sidara Pro GoTo Mount SkyAssist Automated Object Location Optimized for Lunar & Planetary Viewing Beginner-Friendly G...

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CA$840.00 - CA$840.00
CA$840.00
CA$840.00 - CA$840.00
CA$840.00
iOptron 80mm Refractor
CA$181.00 - CA$181.00
CA$181.00
CA$181.00 - CA$181.00
CA$181.00

iOptron 80mm Refractor

IOP-8710

80mm Achromatic Refractor Optics 400mm Focal Length (f/5) Lightweight 2.2 lbs Optical Tube Includes 25mm and 9mm 1.25" Eyepieces 45º Erect Image D...

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CA$181.00 - CA$181.00
CA$181.00
CA$181.00 - CA$181.00
CA$181.00
CA$1,009.00 - CA$1,009.00
CA$1,009.00
CA$1,009.00 - CA$1,009.00
CA$1,009.00

Seestar S30 Pro Smart Telescope

SS-S30-PRO

All-in-One Smart Telescope 4K Dual-Lens Imaging One-Tap Astrophotography Ultra-Portable and Versatile Description Specifications In the Box ...

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CA$1,009.00 - CA$1,009.00
CA$1,009.00
CA$1,009.00 - CA$1,009.00
CA$1,009.00
CA$1,449.00 - CA$1,593.00
CA$1,449.00 - CA$1,593.00
CA$1,449.00 - CA$1,593.00
CA$1,449.00

Seestar S50 Pro télescope intelligent

Options available

Toutes les commandes placées à partir du 15 septembre seront expédiées  vers la fin septembre 2026! Prix spécial précommande valable jus...

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CA$1,449.00 - CA$1,593.00
CA$1,449.00 - CA$1,593.00
CA$1,449.00 - CA$1,593.00
CA$1,449.00
Épuisé
CA$719.00 - CA$719.00
CA$719.00
CA$719.00 - CA$719.00
CA$719.00

Seestar Télescope intelligent S50

ZWO-Seestar-S50

Imagerie solaire, lunaire et spatiale tout-en-un Technologie de suivi et de suivi automatique intelligent GoTo Empilement en direct...

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CA$719.00 - CA$719.00
CA$719.00
CA$719.00 - CA$719.00
CA$719.00
Épuisé
CA$3,339.00 - CA$3,339.00
CA$3,339.00
CA$3,339.00 - CA$3,339.00
CA$3,339.00

SharpStar 100QII f/5.8 Quadruplet APO

SSO-100QII

Comparé aux produits de première génération, il présente les caractéristiques suivantes : 1 La conception optique a changé, en plus du rappor...

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CA$3,339.00 - CA$3,339.00
CA$3,339.00
CA$3,339.00 - CA$3,339.00
CA$3,339.00
CA$5,319.00 - CA$5,319.00
CA$5,319.00
CA$5,319.00 - CA$5,319.00
CA$5,319.00

SharpStar 121SDQ f/5.6 Quintuplet APO

SSO-121SDQ

Ce produit est une nouvelle génération de conception indépendante de télescope réfracteur de haute qualité à espacement aérien quintuple qui p...

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CA$5,319.00 - CA$5,319.00
CA$5,319.00
CA$5,319.00 - CA$5,319.00
CA$5,319.00
Épuisé
CA$615.00 - CA$615.00
CA$615.00
CA$615.00 - CA$615.00
CA$615.00

SharpStar 50EDPH f/5.5 Triplet APO

SSO-SHEDPH50

Le Sharpstar 50EDPH est un OTA avec une ouverture de 50 mm, une distance focale de 275 mm et un rapport focal natif de f/5,5. Le 50EDPH est comp...

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CA$615.00 - CA$615.00
CA$615.00
CA$615.00 - CA$615.00
CA$615.00
Épuisé
CA$2,303.00 - CA$2,303.00
CA$2,303.00
CA$2,303.00 - CA$2,303.00
CA$2,303.00

SharpStar 94EDPH f/5.5 Triplet APO

SSO-94EDPH

Le tout nouveau 94EDPH est le troisième modèle de la série SHARPSTAR EDPH. Le réfracteur à ouverture de 94 mm avec une distance focale de 517 mm...

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CA$2,303.00 - CA$2,303.00
CA$2,303.00
CA$2,303.00 - CA$2,303.00
CA$2,303.00
CA$3,233.00 - CA$3,233.00
CA$3,233.00
CA$3,233.00 - CA$3,233.00
CA$3,233.00

Sharpstar Z4 100mm f/5.5 Sextuplé Apo Astrographe

SSO-Z4

Selon les demandes des utilisateurs et du marché, Sharpstar a récemment lancé un astrographe intégré, le Z4. Il a une ouverture de 100 mm et un ra...

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CA$3,233.00 - CA$3,233.00
CA$3,233.00
CA$3,233.00 - CA$3,233.00
CA$3,233.00
CA$4,580.00 - CA$4,580.00
CA$4,580.00
CA$4,580.00 - CA$4,580.00
CA$4,580.00

Sky-Watcher EDX 120 Super APO Triplet f/7 Telescope

CA$4,580.00 - CA$4,580.00
CA$4,580.00
CA$4,580.00 - CA$4,580.00
CA$4,580.00
CA$2,910.00 - CA$2,910.00
CA$2,910.00
CA$2,910.00 - CA$2,910.00
CA$2,910.00

Sky-Watcher Esprit 100 EDX Super APO Triplet f/5.5 Telescope

SW-S11435

100mm Super-Apochromatic Triplet Optics 550mm Focal Length at f/5.5 3.4" Dual-Speed (11:1) Rack & Pinion Focuser 16 lb Optical Tube Weight Inc...

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CA$2,910.00 - CA$2,910.00
CA$2,910.00
CA$2,910.00 - CA$2,910.00
CA$2,910.00
CA$6,670.00 - CA$6,670.00
CA$6,670.00
CA$6,670.00 - CA$6,670.00
CA$6,670.00

Sky-Watcher Esprit 150 EDX Super APO Triplet f/7 Telescope

SW-S11455

Designed with the discerning astrophotographer in mind, Sky-Watcher’s ALL NEW top-of-the-line Esprit EDX refractors deliver the kind of imaging per...

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CA$6,670.00 - CA$6,670.00
CA$6,670.00
CA$6,670.00 - CA$6,670.00
CA$6,670.00
CA$1,800.00 - CA$1,800.00
CA$1,800.00
CA$1,800.00 - CA$1,800.00
CA$1,800.00

Sky-Watcher Esprit 70EDX Super APO Triplet f/7 Telescope

SW-S11425

70mm Super-Apochromatic ED Triplet Optics 490mm Focal Length at f/7 2.7" Dual-Speed (11:1) Rack & Pinion Focuser 7-pound Optical Tube Assembly...

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CA$1,800.00 - CA$1,800.00
CA$1,800.00
CA$1,800.00 - CA$1,800.00
CA$1,800.00
Épuisé
CA$3,100.00 - CA$3,100.00
CA$3,100.00
CA$3,100.00 - CA$3,100.00
CA$3,100.00

Sky-Watcher Réfracteur Esprit 80 mm ED Triplet APO

SW-S11400

Conçus pour les astrophotographes avertis, les réfracteurs Esprit haut de gamme de Sky-Watcher USA offrent le type de performances d'imagerie que ...

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CA$3,100.00 - CA$3,100.00
CA$3,100.00
CA$3,100.00 - CA$3,100.00
CA$3,100.00
Épuisé

Doublets, Triplets and Glass Types

The purpose of an apochromatic design is to bring three wavelengths to a common focus, eliminating the violet halo that achromatic refractors show on bright stars. How well it does that depends on the glass and the number of elements.

  • ED doublets: Two elements with one extra-low dispersion element. Lighter, less expensive, and excellent for imaging, with a small residual colour that is rarely visible in processed images.
  • Apochromatic triplets: Three elements giving near-complete colour correction, preferred for high-contrast visual observing and for imaging bright stars without halos. Heavier and slower to cool.
  • Petzval designs: Four-element optics with the field correction built in, so no separate flattener is needed and back-focus is fixed by the manufacturer — the simplest path to flat fields.
  • Achromatic refractors: Two-element crown and flint designs, excellent value for lunar, planetary and general visual use where some colour fringing on bright objects is acceptable.
  • Focal ratio: Fast refractors around f/5 give wide fields and short exposures; f/7 and slower give more image scale and are more forgiving of corrector spacing.
  • Matched correctors: Most refractors need a flattener or reducer designed for that specific model, spaced to its exact back-focus.

Why Choose David Astro for Refractors

A refractor is usually bought as the centre of an imaging system, so it should be specified alongside the mount and camera rather than on its own.

  • Corrector matched at the point of sale: We identify the flattener or reducer designed for your specific tube and supply the spacers to hit its back-focus exactly.
  • Focuser load assessed: We check that the stock focuser will carry your intended camera train without slip, and recommend an upgrade only when it genuinely will not.
  • Authorized dealer: Full manufacturer warranty and verified authenticity, with service handled inside Canada.
  • Ships from Canadian stock: No duties or brokerage fees for Canadian buyers, and no extra border handling for a precision optic.
  • Support after first light: Help with spacing, tilt and star shape diagnosis once the telescope is on the sky.

Refractors in Canada — Frequently Asked Questions

Doublet or triplet for imaging?
A good ED doublet is entirely sufficient for most deep-sky imaging and is lighter on the mount. A triplet shows its advantage on bright stars and in high-contrast visual use, at meaningful extra weight and cost.
Do I need a field flattener?
For imaging with anything larger than a small sensor, yes — a two-element refractor has a curved focal plane and corners will show elongated stars without one. Petzval designs have it built in.
How long does a refractor take to cool?
A small doublet is usable almost immediately. A large triplet can take 45 minutes or more to stabilize in Canadian winter conditions, and imaging before it does will show soft, bloated stars.
Is a small refractor enough for deep sky?
Yes, given integration time. A 60 to 80 mm apochromat on a good mount produces excellent wide-field images; total exposure time substitutes for aperture in imaging in a way it cannot for visual work.

Specifying a refractor?

Tell us your mount, camera and targets and we will match the tube and its corrector. Canadian stock, no surprise duties.