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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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$59.99 USD - $59.99 USD
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Explore Scientific 50mm Finder Scope Rings - Standard Height

Designed for 50mm finder scopes Standard height profile at 93mm Lightweight at only 3.9oz (110.6g) Three-point adjustment thumbscrews for precise ...

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Explore Scientific 50mm Finder Scope Rings - Tall

Designed for 50mm Finderscopes Tall Profile for Comfortable Viewing Angles Quick-Release Dovetail Bracket Multi-Point Adjustment Rings Large, Glov...

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Explore Scientific 50mm Finder Scope Rings for Right Angle Finder

Designed for 50mm Aperture Finder Scopes Dual-Ring Bracket with 6 Collimation Points Quick-Release Dovetail Foot (Base Sold Separately) Large, Glo...

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$69.99 USD - $69.99 USD
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Explore Scientific 52° 10mm Waterproof Eyepiece - 1.25"

10mm Focal Length 52° Apparent Field of View 1.25" Barrel Diameter Waterproof, Argon-Purged Construction Flat-Field Multi-Element Optical Design ...

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Explore Scientific 52° 15mm Waterproof Eyepiece - 1.25"

15mm Focal Length 52° Apparent Field of View 1.25" Barrel Diameter Waterproof, Argon-Purged Construction Flat-Field Multi-Element Optical Design ...

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Explore Scientific 52° 20mm Waterproof Eyepiece - 1.25"

20mm Focal Length 52° Apparent Field of View 1.25" Barrel Diameter Waterproof & Argon-Purged Construction Flat-Field Multi-Element Optical Des...

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Explore Scientific 52° 25mm Waterproof Eyepiece - 1.25"

25mm Focal Length 52° Apparent Field of View 1.25" Barrel Diameter Waterproof & Argon-Purged Construction Weighs 6.4 oz (181.4 g) Descripti...

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Explore Scientific 52° 30mm Waterproof Eyepiece - 1.25"

30mm Focal Length 52° Apparent Field of View 1.25" Barrel Diameter Waterproof & Argon-Purged Construction Description FAQ Specifications In...

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Explore Scientific 52° 3mm Waterproof Eyepiece - 1.25"

3mm Focal Length for High-Power Observing 52° Apparent Field of View 1.25" Barrel Diameter Fully Waterproof and Argon-Purged Enhanced Multi-Layer ...

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Explore Scientific 52° 4.5mm Waterproof Eyepiece - 1.25"

High-magnification focal length for detailed views 52° apparent field of view Standard 1.25" barrel format Waterproof and argon-purged for all-wea...

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$149.99 USD - $149.99 USD
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Explore Scientific 52° 40mm Waterproof Eyepiece - 2"

40mm Focal Length 52° Apparent Field of View 2" Diameter Barrel Waterproof and Argon-Purged Construction Fully Multi-Coated, Flat-Field Optics ...

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$149.99 USD - $149.99 USD
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Explore Scientific 52° 6.5mm Waterproof Eyepiece - 1.25"

6.5mm Focal Length 52° Apparent Field of View 1.25" Barrel Diameter Waterproof and Argon-Purged Construction Multi-Coated, Flat-Field Optics De...

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Explore Scientific 5X Focal Extender - 1.25"

Delivers a 5X magnification increase to any 1.25" eyepiece 1.25" barrel diameter fits standard focusers and accessories Telecentric optical design...

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Explore Scientific 6-inch Dobsonian Reflector Telescope
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Explore Scientific 6-inch Dobsonian Reflector Telescope

154mm (6-inch) Primary Mirror 1170mm Focal Length (f/7.6) Dobsonian Mount with Spring Tension System 2-inch Crayford Focuser with 1.25-inch Adapte...

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Explore Scientific 6-inch Tabletop Dobsonian Reflector Telescope
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Explore Scientific 6-inch Tabletop Dobsonian Reflector Telescope

152mm (6-inch) paraboloid primary mirror 760mm focal length at f/5 Tabletop Dobsonian base with altitude tension knob Optical tube weight of 22 lb...

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Explore Scientific 62° 14mm Waterproof Eyepiece - 1.25"

14mm Focal Length 62° Apparent Field of View 1.25" Barrel Diameter Waterproof & Argon-Purged Construction Flat-Field Multi-Element Design D...

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Explore Scientific 62° 20mm Waterproof Eyepiece - 1.25"

1.25" Barrel Format Waterproof & Argon-Purged Flat-Field Optical Design Multi-Coated Optics Near-Parfocal with 62° Series Description FAQ S...

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$79.99 USD - $79.99 USD
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Explore Scientific 62° 26mm Waterproof Eyepiece - 1.25"

26mm Focal Length 62° Apparent Field of View 1.25" Barrel Diameter Waterproof, Argon-Purged Construction Flat-Field Multi-Element Optical Design ...

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Explore Scientific 62° 32mm Waterproof Eyepiece -2"

32mm Focal Length 62° Apparent Field of View 2" Barrel Diameter Waterproof & Argon-Purged Construction Flat-Field Multi-Element Optics Near Pa...

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$259.99 USD - $259.99 USD
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Explore Scientific 62° 40mm Waterproof Eyepiece - 2"

40mm Focal Length 62° Apparent Field of View 2" Diameter Barrel Waterproof & Argon-Purged Construction Flat-Field Multi-Element Optics Desc...

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$259.99 USD - $259.99 USD
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Explore Scientific 62° 5.5mm Waterproof Eyepiece - 1.25"

5.5mm Focal Length 62° Apparent Field of View 1.25" Diameter Barrel Waterproof & Argon-Purged Flat-Field Multi-Element Design Description F...

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Explore Scientific 62° 9mm Waterproof Eyepiece - 1.25"

9mm Focal Length 62° Apparent Field of View 1.25" Barrel Diameter Waterproof & Argon-Purged Flat-Field Optical Design Description FAQ Speci...

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$109.99 USD - $109.99 USD
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Explore Scientific 68° 16mm Waterproof Eyepiece - 1.25"

16mm Focal Length 68° Apparent Field of View 1.25" Barrel Diameter Waterproof & Argon-Purged Parfocal with 68° Series Eyepieces Long Eye Relie...

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$109.99 USD - $109.99 USD
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Explore Scientific 68° 20mm Waterproof Eyepiece - 1.25"

20mm Focal Length 68° Apparent Field of View 1.25" Barrel Diameter Argon-Purged Waterproof Construction Parfocal with other ES 68° Eyepieces De...

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$109.99 USD - $109.99 USD
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$109.99 USD

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.