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Explore Scientific

Explore Scientific occupies a useful place in the market: optics and eyepieces built to a standard that used to cost considerably more, backed by a transferable warranty. Their waterproof, argon-purged wide-field eyepieces and FCD-100 air-spaced apochromatic refractors are the products most often recommended to observers who have outgrown entry-level gear. David Astro carries Explore Scientific products in Canada, held in stock for fast domestic shipping.

Our team uses these instruments in the field, including in the cold and damp conditions where the argon purging in the eyepiece line genuinely earns its keep. We can tell you where the line's strengths are and where a different brand suits your use better.

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CA$153.99 - CA$153.99
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CA$153.99 - CA$153.99
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Explore Scientific 68° 24mm Waterproof Eyepiece - 1.25"

24mm Focal Length 68° Apparent Field of View 1.25" Barrel Diameter Argon-Purged Waterproof Construction Parfocal with 68° Series Eyepieces Desc...

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CA$153.99 - CA$153.99
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CA$153.99
CA$237.99 - CA$237.99
CA$237.99
CA$237.99 - CA$237.99
CA$237.99

Explore Scientific 68° 28mm Waterproof Eyepiece - 2"

28mm Focal Length 68° Apparent Field of View 2" Barrel Diameter Argon-Purged Waterproof Construction Long Eye Relief with Foldable Eyecup Descr...

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CA$237.99 - CA$237.99
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CA$307.99 - CA$307.99
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CA$307.99 - CA$307.99
CA$307.99

Explore Scientific 68° 34mm Waterproof Eyepiece - 2"

34mm Focal Length 68° Apparent Field of View 2" Diameter Barrel Argon-Purged Waterproof Construction Parfocal with other 68° Series Eyepieces Long...

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CA$307.99 - CA$307.99
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CA$433.99 - CA$433.99
CA$433.99
CA$433.99 - CA$433.99
CA$433.99

Explore Scientific 68° 40mm Waterproof Eyepiece - 2"

40mm Focal Length 68° Apparent Field of View 2" Barrel Diameter Argon-Purged Waterproof Construction Long Eye Relief for Eyeglass Wearers Parfocal...

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CA$433.99 - CA$433.99
CA$433.99
CA$433.99 - CA$433.99
CA$433.99
Explore Scientific 72° ED 40mm Waterproof Eyepiece
CA$630.00 - CA$630.00
CA$630.00
CA$630.00 - CA$630.00
CA$630.00

Explore Scientific 72° ED 40mm Waterproof Eyepiece

40mm Focal Length 72° Apparent Field of View 2-Inch Barrel Diameter Extra-Low Dispersion (ED) Glass Waterproof and Gas-Purged Construction Desc...

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CA$630.00 - CA$630.00
CA$630.00
CA$630.00 - CA$630.00
CA$630.00
Explore Scientific 72° ED 8.5mm Waterproof Eyepiece
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00

Explore Scientific 72° ED 8.5mm Waterproof Eyepiece

8.5mm Focal Length 72° Apparent Field of View Extra-Low Dispersion (ED) Glass 1.25" Barrel Diameter Waterproof and Gas-Purged Description FAQ S...

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CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00
Explore Scientific 72° ED Series 11.5mm Waterproof Eyepiece
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00

Explore Scientific 72° ED Series 11.5mm Waterproof Eyepiece

11.5mm Focal Length 72° Apparent Field of View Extra-Low Dispersion (ED) Glass 1.25" Barrel Diameter Waterproof Construction Description FAQ Sp...

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CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00
Explore Scientific 72° ED Series 15mm Waterproof Eyepiece
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00

Explore Scientific 72° ED Series 15mm Waterproof Eyepiece

15mm Focal Length 72° Apparent Field of View 1.25" Diameter Barrel Extra-Low Dispersion (ED) Glass Waterproof Construction Description FAQ Spec...

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CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00
Explore Scientific 72° ED Series 20mm Waterproof Eyepiece
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00

Explore Scientific 72° ED Series 20mm Waterproof Eyepiece

20mm Focal Length 72° Apparent Field of View 1.25" Barrel Diameter Waterproof & Gas-Purged Construction Extra-Low Dispersion (ED) Glass Des...

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CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00
Explore Scientific 72° ED Series 25mm Waterproof Eyepiece
CA$490.00 - CA$490.00
CA$490.00
CA$490.00 - CA$490.00
CA$490.00

Explore Scientific 72° ED Series 25mm Waterproof Eyepiece

25mm Focal Length 72° Apparent Field of View 2-Inch Barrel Diameter Extra-Low Dispersion (ED) Glass Waterproof and Gas-Purged Construction Desc...

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CA$490.00 - CA$490.00
CA$490.00
CA$490.00 - CA$490.00
CA$490.00
Explore Scientific 72° ED Series 30mm Waterproof Eyepiece
CA$560.00 - CA$560.00
CA$560.00
CA$560.00 - CA$560.00
CA$560.00

Explore Scientific 72° ED Series 30mm Waterproof Eyepiece

30mm Focal Length 72° Apparent Field of View 2-inch Barrel Diameter Extra-Low Dispersion (ED) Glass Waterproof and Gas-Purged Construction Desc...

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CA$560.00 - CA$560.00
CA$560.00
CA$560.00 - CA$560.00
CA$560.00
Explore Scientific 72° ED Series 6.5mm Waterproof Eyepiece
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00

Explore Scientific 72° ED Series 6.5mm Waterproof Eyepiece

6.5mm Focal Length for High Magnification 72° Apparent Field of View 1.25" Barrel Diameter Extra-Low Dispersion (ED) Glass Element Waterproof and ...

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CA$420.00 - CA$420.00
CA$420.00
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CA$420.00
Explore Scientific 8-inch Dobsonian Reflector Telescope (Red)
CA$980.00 - CA$980.00
CA$980.00
CA$980.00 - CA$980.00
CA$980.00

Explore Scientific 8-inch Dobsonian Reflector Telescope (Red)

208mm (8-inch) Primary Mirror 1219mm Focal Length f/5.9 Focal Ratio Dobsonian-style Mount 2-inch Crayford Focuser with 1.25-inch Adapter Optical T...

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CA$980.00 - CA$980.00
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CA$980.00
CA$209.99 - CA$209.99
CA$209.99
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CA$209.99

Explore Scientific 82° 11mm Waterproof Eyepiece - 1.25"

11mm Focal Length 82° Apparent Field of View 1.25" Diameter Barrel 21.6mm Eye Relief Waterproof, Argon-Purged Construction Enhanced Multilayer Dep...

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CA$209.99 - CA$209.99
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Explore Scientific 82° 14mm Waterproof Eyepiece - 1.25"

14mm Focal Length 82° Apparent Field of View 1.25" Barrel Diameter Waterproof & Argon-Purged Design 15.6mm Eye Relief 7 Elements in 4 Groups ...

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CA$209.99 - CA$209.99
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CA$265.99 - CA$265.99
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CA$265.99

Explore Scientific 82° 18mm Waterproof Eyepiece - 2"

18mm Focal Length 82° Apparent Field of View 2" Diameter Barrel Waterproof and Argon-Purged Construction 7 Elements in 4 Groups 25.3mm Field Stop ...

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CA$265.99 - CA$265.99
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CA$349.99 - CA$349.99
CA$349.99
CA$349.99 - CA$349.99
CA$349.99

Explore Scientific 82° 24mm Waterproof Eyepiece - 2"

24mm Focal Length 82° Apparent Field of View 17.5mm Eye Relief 2" Barrel Diameter Waterproof Argon-Purged Design 7 Elements in 4 Groups Descrip...

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CA$349.99 - CA$349.99
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CA$419.99 - CA$419.99
CA$419.99
CA$419.99 - CA$419.99
CA$419.99

Explore Scientific 82° 30mm Waterproof Eyepiece - 2"

Focal Length: 30mm Apparent Field of View: 82° Barrel Diameter: 2" Eye Relief: 21.6mm Field Stop: 43mm Weight: 1007 g Description FAQ Spe...

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CA$419.99 - CA$419.99
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CA$209.99 - CA$209.99
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Explore Scientific 82° 4.5mm LER Waterproof Eyepiece - 1.25"

82° Apparent Field of View 4.5mm High-Magnification Focal Length 15.9mm Long Eye Relief (LER) Argon-Purged Waterproof Construction 1.25" Barrel Di...

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CA$209.99 - CA$209.99
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Explore Scientific 82° 6.5mm LER Waterproof Eyepiece - 1.25"

6.5mm Focal Length 82° Apparent Field of View 16.8mm Long Eye Relief (LER) 1.25" Barrel Diameter 7 Elements in 5 Groups Argon-Purged Waterproof Co...

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CA$209.99 - CA$209.99
CA$209.99
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Explore Scientific 82° 8.5mm LER Waterproof Eyepiece - 1.25"

8.5mm Focal Length for High Magnification 82° Apparent Field of View 15mm Long Eye Relief (LER) 1.25" Barrel Diameter Argon-Purged Waterproof Cons...

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CA$209.99 - CA$209.99
CA$209.99
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CA$279.99 - CA$279.99
CA$279.99
CA$279.99 - CA$279.99
CA$279.99

Explore Scientific 8x50 Illuminated Right Angle Polar Finder Scope

8x Magnification 50mm Aperture Right-Angle Eyepiece Erect-Image Optics Illuminated Polar Reticle for Northern & Southern Hemispheres Variable ...

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CA$279.99 - CA$279.99
CA$279.99
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CA$111.99 - CA$111.99
CA$111.99
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CA$111.99

Explore Scientific 8x50 Non-Illuminated Finder Scope

8x50 Optical Design Straight-Through Viewing Standard Crosshair Reticle 6° Field of View Compatible with Explore Scientific Finder Bases Descri...

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CA$111.99 - CA$111.99
CA$111.99
CA$111.99 - CA$111.99
CA$111.99
CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99

Explore Scientific 8x50 Straight Through Illuminated Viewfinder with Bracket

8x Magnification & 50mm Aperture Wide 6° True Field of View Illuminated, Open-Center Reticle with Measurement Scales Correct-Image View (Uprig...

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CA$251.99 - CA$251.99
CA$251.99
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CA$251.99

The Explore Scientific Lineup

Explore Scientific covers visual and imaging from beginner through advanced, with the eyepiece series being the best-known part of the catalogue.

  • 62, 68, 82 and 92 degree eyepieces: Waterproof and argon-purged so internal surfaces cannot fog, which matters on humid Canadian summer nights and in rapid temperature drops.
  • 100 degree series: Very wide apparent field designs for immersive views, particularly effective in undriven Dobsonians where field width equals tracking time.
  • ED apochromatic refractors: FCD-100 and FCD-1 glass air-spaced triplets with carbon fibre and aluminium tube options, suited to both wide-field imaging and high-contrast visual use.
  • Truss-tube and solid-tube Dobsonians: Large-aperture visual instruments with collapsible designs that make transport realistic.
  • Maksutov-Newtonian and Cassegrain optics: Long focal length designs for planetary and lunar detail.
  • Diagonals, Barlows and accessories: Dielectric diagonals, focal extenders and finders designed around the rest of the line.

Why Choose David Astro for Explore Scientific

Explore Scientific's range is broad enough that the wrong choice within it is easy. We narrow it against your telescope and your sky.

  • Eyepiece series matched to focal ratio: The wider series perform best in fast telescopes where cheaper designs break down at the edge; in slow scopes the narrower series is often the better value.
  • Weight and balance checked: The 100 degree eyepieces are heavy enough to unbalance a small Dobsonian, and we will tell you before you order rather than after.
  • Authorized dealer: Full manufacturer warranty, with the transferable coverage properly registered and warranty handled domestically.
  • Canadian stock: In-stock items ship from Canada with no duties or brokerage fees for Canadian buyers.
  • Setup and collimation support: In-house help with first light on the larger Dobsonians and Newtonians.

Explore Scientific in Canada — Frequently Asked Questions

What does argon purging actually do?
It replaces the air inside the eyepiece with dry argon and seals it, so interior lens surfaces cannot fog when the eyepiece is moved between warm and cold air. In Canadian conditions that happens constantly.
Is the 82 or the 92 degree series better?
The 92 series has a wider field and better edge correction in fast telescopes, at more weight and cost. In an f/8 or slower scope the 82 series performs very close to it for considerably less.
Are the ED refractors good for imaging?
Yes, paired with a matched field flattener. The triplet designs control colour well enough for broadband imaging, and the focusers on the current models handle typical imaging trains.
Is the warranty valid if I buy in Canada?
Yes, and it is handled here. As an authorized dealer we register and service warranty claims domestically, without international shipping.

Choosing within the range?

Tell us your telescope and what you observe, and we will narrow it down. Canadian stock, warranty handled here.