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Closed October 10–12 for Thanksgiving weekend
Closed October 10–12 for Thanksgiving weekend
Refractors

Refractors

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.

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CA$167.00 - CA$167.00
CA$167.00
CA$167.00 - CA$167.00
CA$167.00

Celestron Travel Scope™ 70 Portable Telescope

CEL-21035

70mm (2.8") Refractor Optical Design 400mm Focal Length (f/5.7) Total Kit Weight of Just 3.3 lbs (1.5 kg) Includes 20x and 40x Eyepieces Custom Ba...

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CA$167.00 - CA$167.00
CA$167.00
CA$167.00 - CA$167.00
CA$167.00
CA$208.00 - CA$208.00
CA$208.00
CA$208.00 - CA$208.00
CA$208.00

Celestron Travel Scope™ 80 Portable Telescope w/ Smartphone Adapter

CEL-22030

80mm refractor telescope with coated glass optics Lightweight frame and manual Alt-Azimuth mount weighing only 4.2 lbs total Includes two eyepiece...

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CA$208.00 - CA$208.00
CA$208.00
CA$208.00 - CA$208.00
CA$208.00
Daystar 80mm f/6 Achromatic Refractor
CA$699.00 - CA$699.00
CA$699.00
CA$699.00 - CA$699.00
CA$699.00

Daystar 80mm f/6 Achromatic Refractor

DAY-480EUD

80mm Aperture f/6 Focal Ratio 480mm Focal Length Achromatic Refractor Design Rack & Pinion Focuser Description FAQ Specifications In the Bo...

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CA$699.00 - CA$699.00
CA$699.00
CA$699.00 - CA$699.00
CA$699.00
Daystar 80mm f/6.25 ED APO Refractor
CA$1,119.00 - CA$1,119.00
CA$1,119.00
CA$1,119.00 - CA$1,119.00
CA$1,119.00

Daystar 80mm f/6.25 ED APO Refractor

DAY-500EUD

80mm Aperture 500mm Focal Length (f/6.25) Apochromatic ED Glass Optics 2" Rack & Pinion Hybrid Drive Focuser Includes 90mm White Light Solar F...

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CA$1,119.00 - CA$1,119.00
CA$1,119.00
CA$1,119.00 - CA$1,119.00
CA$1,119.00
CA$629.99 - CA$629.99
CA$629.99
CA$629.99 - CA$629.99
CA$629.99

Explore Scientific AR102 Doublet Refractor

ES-DAR102065-02
1 in stock

102mm (4-inch) Aperture f/6.5 Focal Ratio 11.5 lbs Optical Tube Weight Two-Speed 2" Crayford Focuser Includes 2" Dielectric Diagonal & 8x50 Fi...

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CA$629.99 - CA$629.99
CA$629.99
CA$629.99 - CA$629.99
CA$629.99
CA$1,049.99 - CA$1,049.99
CA$1,049.99
CA$1,049.99 - CA$1,049.99
CA$1,049.99

Explore Scientific AR127 Doublet Refractor

ES-DAR127065-02
1 in stock

127mm Achromatic Doublet Refractor Air-Spaced Crown-and-Flint Optics Dual-Speed Focuser for Fine Adjustment Dielectric-Coated Diagonal Included Cr...

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CA$1,049.99 - CA$1,049.99
CA$1,049.99
CA$1,049.99 - CA$1,049.99
CA$1,049.99
CA$1,189.99 - CA$1,189.99
CA$1,189.99
CA$1,189.99 - CA$1,189.99
CA$1,189.99

Explore Scientific AR152 Doublet Refractor

ES-DAR152065-02

152mm (6-inch) Aperture f/6.5 Focal Ratio Air-Spaced Doublet Achromatic Optics 2" Dual-Speed Focuser 2" Diagonal with 99% Dielectric Coatings 8x50...

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CA$1,189.99 - CA$1,189.99
CA$1,189.99
CA$1,189.99 - CA$1,189.99
CA$1,189.99
Explore Scientific ED102-FCD100 Series Air-Spaced Triplet Telescope in Carbon Fiber + iEXOS-100-02 PMC-Eight Equatorial Tracker (Bundle)
CA$2,800.00 - CA$2,800.00
CA$2,800.00
CA$2,800.00 - CA$2,800.00
CA$2,800.00

Explore Scientific ED102-FCD100 Series Air-Spaced Triplet Telescope in Carbon Fiber + iEXOS-100-02 PMC-Eight Equatorial Tracker (Bundle)

ES-FCD100-102-CF-IEXOS100

Features premium HOYA FCD100 ED glass for superior color correction Air-spaced triplet optical design delivers high-contrast, sharp images Lightwe...

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CA$2,800.00 - CA$2,800.00
CA$2,800.00
CA$2,800.00 - CA$2,800.00
CA$2,800.00
CA$2,379.99 - CA$2,379.99
CA$2,379.99
CA$2,379.99 - CA$2,379.99
CA$2,379.99

Explore Scientific ED102-FCD100 Series Triplet APO Refractor

ES-FCD100-10207-02

102mm Aperture 714mm Focal Length (f/7) Air-Spaced Triplet Apochromatic Design Genuine HOYA FCD100 ED Glass Element 2.5" HEX Focuser with 10 lb Ca...

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CA$2,379.99 - CA$2,379.99
CA$2,379.99
CA$2,379.99 - CA$2,379.99
CA$2,379.99
CA$2,659.99 - CA$2,659.99
CA$2,659.99
CA$2,659.99 - CA$2,659.99
CA$2,659.99

Explore Scientific ED102-FCD100 Series Triplet Telescope - Carbon Fiber

ES-FCD100-10207-CF-01
1 in stock

102mm Aperture Air-Spaced Triplet Apochromatic Optics Premium HOYA FCD100 ED Glass Carbon Fiber Optical Tube Assembly 2.5" Hexagonal Rack & Pi...

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CA$2,659.99 - CA$2,659.99
CA$2,659.99
CA$2,659.99 - CA$2,659.99
CA$2,659.99
CA$5,599.99 - CA$5,599.99
CA$5,599.99
CA$5,599.99 - CA$5,599.99
CA$5,599.99

Explore Scientific ED152 Triplet in Carbon Fiber

ES-TED15208CF-HEX33

152mm (6") Aperture f/8 Focal Ratio Air-Spaced Triplet Apochromatic Optics HOYA FCD1 Extra-Low Dispersion Glass Carbon Fiber Optical Tube 20.5 lbs...

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CA$5,599.99 - CA$5,599.99
CA$5,599.99
CA$5,599.99 - CA$5,599.99
CA$5,599.99
Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope (Bundle)
CA$1,400.00 - CA$1,400.00
CA$1,400.00
CA$1,400.00 - CA$1,400.00
CA$1,400.00

Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope (Bundle)

ES-ED-0806-FF-IEXOS100

ED80 Air-Spaced Triplet Apochromatic Refractor iEXOS-100 GoTo German Equatorial Mount Wireless PMC-Eight Precision Motion Control System Includes ...

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CA$1,400.00 - CA$1,400.00
CA$1,400.00
CA$1,400.00 - CA$1,400.00
CA$1,400.00
Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope + Field Flattener f/5 to f/7 (Bundle)
CA$1,092.00 - CA$1,092.00
CA$1,092.00
CA$1,092.00 - CA$1,092.00
CA$1,092.00

Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope + Field Flattener f/5 to f/7 (Bundle)

ES-ED-0806-FF

80mm Aperture Air-Spaced Apochromatic Triplet Optics Features HOYA FCD1 Extra-Low Dispersion Glass Includes Field Flattener for f/5 to f/7 Telesco...

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CA$1,092.00 - CA$1,092.00
CA$1,092.00
CA$1,092.00 - CA$1,092.00
CA$1,092.00
Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer and iEXOS-100-2 PMC-Eight Equatorial Tracker System
CA$1,400.00 - CA$1,400.00
CA$1,400.00
CA$1,400.00 - CA$1,400.00
CA$1,400.00

Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer and iEXOS-100-2 PMC-Eight Equatorial Tracker System

ES-ED-0806-FR0.8x-IEXOS100

80mm Air-Spaced Apochromatic Triplet Refractor iEXOS-100-2 GoTo Equatorial Mount with PMC-Eight Controller Includes 0.8x Two-Element Focal Reducer...

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CA$1,400.00 - CA$1,400.00
CA$1,400.00
CA$1,400.00 - CA$1,400.00
CA$1,400.00
Explore Scientific ED80-FCD100 Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer (Bundle)
CA$2,086.00 - CA$2,086.00
CA$2,086.00
CA$2,086.00 - CA$2,086.00
CA$2,086.00

Explore Scientific ED80-FCD100 Air-Spaced Triplet Refractor Telescope with 0.8x Focal Reducer (Bundle)

ES-FCD100-0806-FR0.8x-IEXOS100

80mm Air-Spaced Triplet Apochromatic OTA Includes a matched 0.8x Focal Reducer iEXOS-100 Equatorial Mount with GoTo PMC-Eight wireless control sys...

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CA$2,086.00 - CA$2,086.00
CA$2,086.00
CA$2,086.00 - CA$2,086.00
CA$2,086.00
Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope (Bundle)
CA$2,086.00 - CA$2,086.00
CA$2,086.00
CA$2,086.00 - CA$2,086.00
CA$2,086.00

Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope (Bundle)

ES-FCD100-0806-FF-IEXOS100

Complete astrophotography bundle with 80mm triplet refractor and GoTo mount 80mm aperture and 480mm focal length for wide-field imaging HOYA FCD10...

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CA$2,086.00 - CA$2,086.00
CA$2,086.00
CA$2,086.00 - CA$2,086.00
CA$2,086.00
Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + 0.8x Focal Reducer (Bundle)
CA$1,638.00 - CA$1,638.00
CA$1,638.00
CA$1,638.00 - CA$1,638.00
CA$1,638.00

Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + 0.8x Focal Reducer (Bundle)

ES-FCD100-0806-FR0.8x

80mm Aperture 480mm Focal Length (f/6) HOYA FCD100 ED Air-Spaced Triplet Optics Includes 0.8x Focal Reducer/Corrector 2.5" Hexagonal Focuser De...

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CA$1,638.00 - CA$1,638.00
CA$1,638.00
CA$1,638.00 - CA$1,638.00
CA$1,638.00
Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + Field Flattener f/5 to f/7 (Bundle)
CA$1,638.00 - CA$1,638.00
CA$1,638.00
CA$1,638.00 - CA$1,638.00
CA$1,638.00

Explore Scientific ED80-FCD100 Series Air-Spaced Triplet Refractor Telescope + Field Flattener f/5 to f/7 (Bundle)

ES-FCD100-0806-FF

80mm Aperture Triplet Apochromatic Refractor Features Hoya FCD100 ED Glass Element Air-Spaced Triplet Objective Lens Includes Field Flattener for ...

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CA$1,638.00 - CA$1,638.00
CA$1,638.00
CA$1,638.00 - CA$1,638.00
CA$1,638.00
CA$1,567.99 - CA$1,567.99
CA$1,567.99
CA$1,567.99 - CA$1,567.99
CA$1,567.99

Explore Scientific ED80-FCD100 Series Triplet APO Refractor

ES-FCD100-0806-02

Apochromatic Triplet Refractor Genuine HOYA FCD100 ED Glass Air-Spaced Optical Design Proprietary EMD Multi-Layer Coatings Heavy-Duty Hexagonal Fo...

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CA$1,567.99 - CA$1,567.99
CA$1,567.99
CA$1,567.99 - CA$1,567.99
CA$1,567.99
Explore Scientific ED80-FCD100 Triplet Refractor & iEXOS-100-02 Mount Bundle
CA$1,092.00 - CA$1,092.00
CA$1,092.00
CA$1,092.00 - CA$1,092.00
CA$1,092.00

Explore Scientific ED80-FCD100 Triplet Refractor & iEXOS-100-02 Mount Bundle

ES-ED-0806-FR0.8x

Features genuine HOYA FCD100 ED glass for superior color correction Air-spaced triplet optical design virtually eliminates chromatic aberration Li...

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CA$1,092.00 - CA$1,092.00
CA$1,092.00
CA$1,092.00 - CA$1,092.00
CA$1,092.00
Explore Scientific Explore FirstLight 80mm CF Telescope Go-To Tracker Combo with Solar Filter
CA$574.00 - CA$574.00
CA$574.00
CA$574.00 - CA$574.00
CA$574.00

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$574.00 - CA$574.00
CA$574.00
CA$574.00 - CA$574.00
CA$574.00
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 FCD100 Series 127mm f/7.5 Triplet APO Refractor - Aluminum with 2.5" HEX Focuser

ES-FCD100-127075-02

127mm (5") Aperture f/7.5 Focal Ratio Air-Spaced Triplet Apochromatic Optics HOYA FCD100 ED Glass Element 2.5" Hexagonal Rack-and-Pinion Focuser ...

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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 FCD100 Series 127mm f/7.5 Triplet APO Refractor - Carbon Fiber with 2.5" HEX Focuser

ES-FCD100-127075-CF-01

127mm Aperture f/7.5 Focal Ratio / 952mm Focal Length Air-Spaced Triplet Apochromat with FCD100 Glass Carbon Fiber Optical Tube 2.5" HEX Focuser ...

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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

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.