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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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Askar SQA130 f/4.8 Quintuplet Petzval Astrograph
CA$6,719.00 - CA$6,719.00
CA$6,719.00
CA$6,719.00 - CA$6,719.00
CA$6,719.00

Askar SQA130 f/4.8 Quintuplet Petzval Astrograph

ASK-SQA130

130mm Aperture Quintuplet Petzval APO Optics 624mm Focal Length at a Fast f/4.8 Focal Ratio 55mm Corrected Image Circle for Medium Format Sensors ...

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CA$6,719.00 - CA$6,719.00
CA$6,719.00
CA$6,719.00 - CA$6,719.00
CA$6,719.00
CA$1,113.00 - CA$1,113.00
CA$1,113.00
CA$1,113.00 - CA$1,113.00
CA$1,113.00

Askar SQA55 55mm f/4.8 Quintuplet APO

ASK-ASKSQA55
2 in stock

55mm Aperture Quintuplet APO Astrograph Fast f/4.8 Focal Ratio 264mm Focal Length Covers a 44mm Full-Frame Image Circle 14-Blade Aperture with f/4...

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CA$1,113.00 - CA$1,113.00
CA$1,113.00
CA$1,113.00 - CA$1,113.00
CA$1,113.00
CA$1,792.00 - CA$1,792.00
CA$1,792.00
CA$1,792.00 - CA$1,792.00
CA$1,792.00

Askar SQA60 Pro 60mm f/4.6 Sextuplet APO

ASK-SQA60
2 in stock

60mm Aperture Sextuplet APO Optics 276mm Focal Length at a Fast f/4.6 44mm Full-Frame Corrected Image Circle Integrated Petzval Design with 2 SD G...

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CA$1,792.00 - CA$1,792.00
CA$1,792.00
CA$1,792.00 - CA$1,792.00
CA$1,792.00
CA$2,233.00 - CA$2,233.00
CA$2,233.00
CA$2,233.00 - CA$2,233.00
CA$2,233.00

Askar SQA70 70mm f/4.8 Quintuplet APO

ASK-SQA70
1 in stock

70mm Aperture 336mm Focal Length f/4.8 Focal Ratio Quintuplet (5-Element) APO Petzval Optical Design 44mm Full-Frame Image Circle Contains Two ED ...

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CA$2,233.00 - CA$2,233.00
CA$2,233.00
CA$2,233.00 - CA$2,233.00
CA$2,233.00
CA$3,353.00 - CA$3,353.00
CA$3,353.00
CA$3,353.00 - CA$3,353.00
CA$3,353.00

Askar SQA85 85mm f/4.8 Quintuplet APO

ASK-SQA85
1 in stock

85mm Aperture 408mm Focal Length (f/4.8) Quintuplet Petzval APO Optical Design Supports Full-Frame (44mm) Image Circle 3.64kg OTA Weight Descri...

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CA$3,353.00 - CA$3,353.00
CA$3,353.00
CA$3,353.00 - CA$3,353.00
CA$3,353.00
CA$2,611.00 - CA$2,611.00
CA$2,611.00
CA$2,611.00 - CA$2,611.00
CA$2,611.00

Askar V 60/80mm Modular Telescope

ASK-ASKARV80

60mm Aperture Triplet Air-Spaced APO Objective 360mm Focal Length f/6 Native Focal Ratio Modular design supports optional 80mm objective lens Stan...

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CA$2,611.00 - CA$2,611.00
CA$2,611.00
CA$2,611.00 - CA$2,611.00
CA$2,611.00
CA$2,640.00 - CA$2,640.00
CA$2,640.00
CA$2,640.00 - CA$2,640.00
CA$2,640.00

Celestron Advanced VX 6" Refractor Telescope

CEL-22020

150mm (6") Refractor with Fully Multi-Coated Optics 1200mm Focal Length at an f/8 Focal Ratio Advanced VX Computerized GoTo Equatorial Mount 30 lb...

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CA$2,640.00 - CA$2,640.00
CA$2,640.00
CA$2,640.00 - CA$2,640.00
CA$2,640.00
CA$500.00 - CA$500.00
CA$500.00
CA$500.00 - CA$500.00
CA$500.00

Celestron AstroMaster 102AZ Telescope

CEL-22065

102mm (4") refractor optical tube 660mm focal length at f/6.5 Manual alt-azimuth mount with smooth, intuitive controls Includes 33x and 66x magnif...

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CA$500.00 - CA$500.00
CA$500.00
CA$500.00 - CA$500.00
CA$500.00
CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00

Celestron AstroMaster 70AZ Telescope

CEL-21061

70mm (2.76") Refractor Telescope 900mm Focal Length f/13 Focal Ratio Manual Alt-Azimuth Mount Includes 45x and 90x Eyepieces 100x More Light Gathe...

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CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00
CA$459.00 - CA$459.00
CA$459.00
CA$459.00 - CA$459.00
CA$459.00

Celestron AstroMaster 90AZ Telescope

CEL-21063
1 in stock

90mm refractor optical tube 1000mm focal length (f/11) Alt-Azimuth mount with pan handle control Includes 2 eyepieces for 50x and 100x magnificati...

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CA$459.00 - CA$459.00
CA$459.00
CA$459.00 - CA$459.00
CA$459.00
CA$500.00 - CA$500.00
CA$500.00
CA$500.00 - CA$500.00
CA$500.00

Celestron AstroMaster 90EQ Telescope

CEL-21064

90mm (3.54") Refractor Optical Tube 1000mm Focal Length (f/11) CG-3 Equatorial Mount with Slow-Motion Controls Includes 20mm (50x) and 10mm (100x)...

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CA$500.00 - CA$500.00
CA$500.00
CA$500.00 - CA$500.00
CA$500.00
CA$236.00 - CA$236.00
CA$236.00
CA$236.00 - CA$236.00
CA$236.00

Celestron AstroMaster LT 70AZ Telescope

CEL-21074

70mm (2.76") refractor optical design 700mm focal length at an f/10 focal ratio Includes 35x and 70x magnification eyepieces Lightweight manual al...

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CA$236.00 - CA$236.00
CA$236.00
CA$236.00 - CA$236.00
CA$236.00
CA$528.00 - CA$528.00
CA$528.00
CA$528.00 - CA$528.00
CA$528.00

Celestron Inspire 100AZ Refractor Telescope

CEL-22403

100mm (3.94") refractor optical tube 660mm focal length at a f/6.5 focal ratio Lightweight manual Alt-Azimuth mount StarPointer™ Pro red dot finde...

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CA$528.00 - CA$528.00
CA$528.00
CA$528.00 - CA$528.00
CA$528.00
CA$973.00 - CA$973.00
CA$973.00
CA$973.00 - CA$973.00
CA$973.00

Celestron Omni XLT 102 Telescope

CEL-21088

102mm (4.02") Refractor Optical Tube 1000mm Focal Length at f/9.8 StarBright XLT Optical Coatings Omni CG-4 German Equatorial Mount 1.75" Stainles...

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CA$973.00 - CA$973.00
CA$973.00
CA$973.00 - CA$973.00
CA$973.00
CA$1,181.00 - CA$1,181.00
CA$1,181.00
CA$1,181.00 - CA$1,181.00
CA$1,181.00

Celestron Omni XLT 120 Telescope

CEL-21090

120mm (4.72") Refractor Optical Design 1000mm Focal Length at f/8.33 StarBright XLT Optical Coatings Omni CG-4 German Equatorial Mount 1.75" Stain...

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CA$1,181.00 - CA$1,181.00
CA$1,181.00
CA$1,181.00 - CA$1,181.00
CA$1,181.00
CA$90.00 - CA$90.00
CA$90.00
CA$90.00 - CA$90.00
CA$90.00

Celestron PowerSeeker 50AZ Telescope

CEL-21039

50mm refractor with fully coated glass optics 600mm focal length and f/12 focal ratio for planetary viewing Manual Alt-Azimuth mount with smooth, ...

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CA$90.00 - CA$90.00
CA$90.00
CA$90.00 - CA$90.00
CA$90.00
CA$139.00 - CA$139.00
CA$139.00
CA$139.00 - CA$139.00
CA$139.00

Celestron PowerSeeker 60AZ Telescope

CEL-21041

60mm (2.36") refractor optical tube 700mm focal length with an f/12 focal ratio Manual Alt-Azimuth mount with pan handle control Provides 35x and ...

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CA$139.00 - CA$139.00
CA$139.00
CA$139.00 - CA$139.00
CA$139.00
CA$185.00 - CA$185.00
CA$185.00
CA$185.00 - CA$185.00
CA$185.00

Celestron PowerSeeker 60EQ Telescope

CEL-21043
1 in stock

60mm (2.36") Refractor Telescope 900mm Focal Length, f/15 Focal Ratio Manual German Equatorial Mount with Slow-Motion Controls Highest Useful Magn...

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CA$185.00 - CA$185.00
CA$185.00
CA$185.00 - CA$185.00
CA$185.00
CA$264.00 - CA$264.00
CA$264.00
CA$264.00 - CA$264.00
CA$264.00

Celestron PowerSeeker 80AZS Telescope

CEL-21087

80mm refractor with a fast f/5 focal ratio for wide, bright views Ultra-lightweight 5.9 lb total kit weight for ultimate portability Manual Alt-Az...

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CA$264.00 - CA$264.00
CA$264.00
CA$264.00 - CA$264.00
CA$264.00
CA$292.00 - CA$292.00
CA$292.00
CA$292.00 - CA$292.00
CA$292.00

Celestron PowerSeeker 80EQ Telescope

CEL-21048

80mm (3.15") Refractor Optical Tube 900mm Focal Length at f/11 Focal Ratio Manual German Equatorial Mount with Slow-Motion Controls Provides 45x a...

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CA$292.00 - CA$292.00
CA$292.00
CA$292.00 - CA$292.00
CA$292.00
CA$681.00 - CA$681.00
CA$681.00
CA$681.00 - CA$681.00
CA$681.00

Celestron StarSense Explorer™ DX 102AZ Smartphone App-Enabled Refractor Telescope

CEL-22460
2 in stock

102mm (4.01") Refractor Optical Tube 660mm Focal Length (f/6.5) Patented StarSense Sky Recognition App Fully XLT Coated Glass Optics Lightweight 1...

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CA$681.00 - CA$681.00
CA$681.00
CA$681.00 - CA$681.00
CA$681.00
CA$347.00 - CA$347.00
CA$347.00
CA$347.00 - CA$347.00
CA$347.00

Celestron StarSense Explorer™ LT 80AZ Smartphone App-Enabled Refractor Telescope

CEL-22451

80mm (3.1") Refractor Telescope StarSense Explorer App for Smartphone-Guided Navigation 900mm Focal Length (f/11) Manual Alt-Azimuth Mount Total K...

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CA$347.00 - CA$347.00
CA$347.00
CA$347.00 - CA$347.00
CA$347.00
CA$111.00 - CA$111.00
CA$111.00
CA$111.00 - CA$111.00
CA$111.00

Celestron Travel Scope™ 50 Portable Telescope

CEL-21038

50mm (2") refractor for crisp views of the Moon, planets, and terrestrial objects Complete kit weighs only 2.2 lbs for ultimate portability Includ...

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CA$111.00 - CA$111.00
CA$111.00
CA$111.00 - CA$111.00
CA$111.00
CA$181.00 - CA$181.00
CA$181.00
CA$181.00 - CA$181.00
CA$181.00

Celestron Travel Scope™ 70 DX Portable Telescope

CEL-22035

70mm (2.8") Refractor Optical Tube 400mm Focal Length with f/5.7 Focal Ratio Total Kit Weight of Just 3.3 lbs Includes Smartphone Adapter and Blue...

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CA$181.00 - CA$181.00
CA$181.00
CA$181.00 - CA$181.00
CA$181.00

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.