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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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Explore Scientific 0.8x Focal Reducer
CA$196.00 - CA$196.00
CA$196.00
CA$196.00 - CA$196.00
CA$196.00

Explore Scientific 0.8x Focal Reducer

Reduces focal length by a factor of 0.8x for wider fields of view Designed for Explore Scientific 80mm f/6 and 102mm f/7 refractors Provides 55mm ...

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CA$196.00 - CA$196.00
CA$196.00
CA$196.00 - CA$196.00
CA$196.00
Explore Scientific 10-inch Dobsonian Reflector 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 10-inch Dobsonian Reflector Telescope

254mm (10-inch) Newtonian Reflector Optics 1200mm Focal Length (f/4.7) Stable Dobsonian Mount with Spring Tension System 2-inch Crayford-Style Foc...

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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
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CA$1,050.00
CA$1,050.00 - CA$1,050.00
CA$1,050.00
CA$990.00
CA$990.00 - CA$990.00
CA$990.00

Explore Scientific 10-inch Dobsonian Reflector Telescope - Open Box

This telescope is a return, being returned due to its size. It was assembled, the client found it too big, then disassembled and returned. Designe...

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CA$1,050.00
CA$1,050.00 - CA$1,050.00
CA$1,050.00
CA$990.00
CA$990.00 - CA$990.00
CA$990.00
Save 6% Save %
Explore Scientific 10-inch f/5 Hybrid Truss Tube Dobsonian 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 10-inch f/5 Hybrid Truss Tube Dobsonian Telescope

254mm (10-inch) Newtonian Reflector Optics 1270mm Focal Length Fast f/5 Focal Ratio Portable Hybrid Truss Tube Design Dobsonian Base with Altitude...

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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
CA$489.99 - CA$489.99
CA$489.99
CA$489.99 - CA$489.99
CA$489.99

Explore Scientific 100° 14mm Waterproof Eyepiece - 2"

14mm Focal Length 100° Apparent Field of View 2" Barrel Diameter Argon-Purged and Waterproof Construction Fully Multi-Coated and Edge-Blackened Op...

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CA$489.99 - CA$489.99
CA$489.99
CA$489.99 - CA$489.99
CA$489.99
CA$699.99 - CA$699.99
CA$699.99
CA$699.99 - CA$699.99
CA$699.99

Explore Scientific 100° 20mm Waterproof Eyepiece - 2"

20mm Focal Length 100° Apparent Field of View 14.5mm Eye Relief 2-inch Diameter Barrel 9-Element Optical Design Argon-Purged Waterproof Constructi...

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CA$699.99 - CA$699.99
CA$699.99
CA$699.99 - CA$699.99
CA$699.99
CA$1,259.99 - CA$1,259.99
CA$1,259.99
CA$1,259.99 - CA$1,259.99
CA$1,259.99

Explore Scientific 100° 25mm Waterproof Eyepiece - 2"

100° Apparent Field of View 25mm Focal Length 2-Inch Barrel Diameter 9-Element Optical Design Waterproof (1 Meter for 30 Minutes) and Argon-Purged...

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CA$1,259.99 - CA$1,259.99
CA$1,259.99
CA$1,259.99 - CA$1,259.99
CA$1,259.99
CA$1,763.99 - CA$1,763.99
CA$1,763.99
CA$1,763.99 - CA$1,763.99
CA$1,763.99

Explore Scientific 100° 30mm Waterproof Eyepiece - 3"

30mm Focal Length 100° Apparent Field of View 3" Diameter Barrel Argon-Purged and Waterproof to 1 Meter for 30 Minutes 9-Element Optical Design 19...

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CA$1,763.99 - CA$1,763.99
CA$1,763.99
CA$1,763.99 - CA$1,763.99
CA$1,763.99
CA$419.99 - CA$419.99
CA$419.99
CA$419.99 - CA$419.99
CA$419.99

Explore Scientific 100° 5.5mm Waterproof Eyepiece - 2"

5.5mm Focal Length 100° Apparent Field of View 2" Barrel with a tapered design for enhanced security in the focuser Argon-purged, waterproof, test...

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

Explore Scientific 100° 9mm Waterproof Eyepiece - 2"

9mm Focal Length 100° Apparent Field of View 2" Barrel Diameter Argon-Purged Waterproof Construction 9-Element Optical Design 12.5mm Eye Relief ...

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CA$419.99 - CA$419.99
CA$419.99
CA$419.99 - CA$419.99
CA$419.99
Explore Scientific 114mm Newtonian Reflector Telescope with Equatorial Mount
CA$280.00 - CA$280.00
CA$280.00
CA$280.00 - CA$280.00
CA$280.00

Explore Scientific 114mm Newtonian Reflector Telescope with Equatorial Mount

114mm (4.5") primary mirror gathers ample light for planets and bright deep-sky objects Fast f/4.4 focal ratio provides expansive, wide-field view...

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CA$280.00 - CA$280.00
CA$280.00
CA$280.00 - CA$280.00
CA$280.00
CA$1,259.99 - CA$1,259.99
CA$1,259.99
CA$1,259.99 - CA$1,259.99
CA$1,259.99

Explore Scientific 120° 9mm Waterproof Eyepiece -2"

9mm Focal Length 120° Apparent Field of View 2" Diameter Barrel 12 Elements in 8 Groups Argon-Purged Waterproof Construction Tapered 2" Barrel ...

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CA$1,259.99 - CA$1,259.99
CA$1,259.99
CA$1,259.99 - CA$1,259.99
CA$1,259.99
Explore Scientific 12V DC 2A Power Supply for PMC-Eight systems
CA$28.00 - CA$28.00
CA$28.00
CA$28.00 - CA$28.00
CA$28.00

Explore Scientific 12V DC 2A Power Supply for PMC-Eight systems

Provides 12V DC Power Delivers up to 2 Amps of Current Official Power Supply for Explore Scientific PMC-Eight Systems Ensures Stable Voltage for G...

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CA$28.00 - CA$28.00
CA$28.00
CA$28.00 - CA$28.00
CA$28.00
CA$139.99 - CA$139.99
CA$139.99
CA$139.99 - CA$139.99
CA$139.99

Explore Scientific 2" Adapter for FFFR507X-00

Adapts the 3" 0.7x Reducer (FFFR507X-00) to fit 2" focusers Enables use of premium optics on a wider range of telescopes Secure, precision-machine...

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CA$139.99 - CA$139.99
CA$139.99
CA$139.99 - CA$139.99
CA$139.99
CA$97.99 - CA$97.99
CA$97.99
CA$97.99 - CA$97.99
CA$97.99

Explore Scientific 2" T2 Camera Adapter

Connects DSLR cameras to any 2-inch telescope focuser Standard male T2-thread (M42x0.75) for camera-specific T-rings Enables direct prime-focus as...

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CA$97.99 - CA$97.99
CA$97.99
CA$97.99 - CA$97.99
CA$97.99
Explore Scientific 2" Variable Polarizing Filter
CA$252.00 - CA$252.00
CA$252.00
CA$252.00 - CA$252.00
CA$252.00

Explore Scientific 2" Variable Polarizing Filter

2" Filter Barrel Size Continuously Variable Brightness Ideal for Lunar, Planetary, and Solar Observing Neutral Gray Color Rendition Stackable with...

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CA$252.00 - CA$252.00
CA$252.00
CA$252.00 - CA$252.00
CA$252.00
CA$167.99 - CA$167.99
CA$167.99
CA$167.99 - CA$167.99
CA$167.99

Explore Scientific 2x Focal Extender - 1.25"

Doubles the magnification of any 1.25" eyepiece Telecentric optical design ensures a true 2x power factor Maintains the original eye relief of the...

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CA$167.99 - CA$167.99
CA$167.99
CA$167.99 - CA$167.99
CA$167.99
CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99

Explore Scientific 2X Focal Extender - 2"

2X Focal Extender 2-inch Barrel with 1.25-inch Adapter Telecentric Optical Design Fully EMD-Coated Optics Edge-Blackened Lens Elements Descript...

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CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99
CA$559.99 - CA$559.99
CA$559.99
CA$559.99 - CA$559.99
CA$559.99

Explore Scientific 3" Field Flattener .7x Focal Reducer

Reduces focal ratio by a factor of 0.7x for wider fields and shorter exposures Functions as a field flattener to correct edge-of-field aberrations...

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CA$559.99 - CA$559.99
CA$559.99
CA$559.99 - CA$559.99
CA$559.99
Explore Scientific 3-inch Self-Centering Focuser
CA$1,190.00 - CA$1,190.00
CA$1,190.00
CA$1,190.00 - CA$1,190.00
CA$1,190.00

Explore Scientific 3-inch Self-Centering Focuser

3-inch self-centering draw tube 17 lb (7.7 kg) lifting capacity 9:1 dual-speed focusing system 84.5mm of precision draw tube travel Smooth rotatio...

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CA$1,190.00 - CA$1,190.00
CA$1,190.00
CA$1,190.00 - CA$1,190.00
CA$1,190.00
Explore Scientific 3-inch Self-Centering Focuser with Back Cell Adapter for FCD100-127-CF
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 3-inch Self-Centering Focuser with Back Cell Adapter for FCD100-127-CF

3-inch Self-Centering Focuser Design 17 lb Lifting Capacity for Heavy Imaging Trains 9:1 Dual-Speed Helical Rack-and-Pinion Mechanism 84.5mm of Pr...

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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 3-inch Self-Centering Focuser with Back Cell Adapter for White Tube ED127 and FCD-100
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 3-inch Self-Centering Focuser with Back Cell Adapter for White Tube ED127 and FCD-100

Designed for Explore Scientific white-tube ED127 and FCD-100 refractors 17 lb instrument lifting capacity Self-centering compression system elimin...

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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
CA$195.99 - CA$195.99
CA$195.99
CA$195.99 - CA$195.99
CA$195.99

Explore Scientific 3X Focal Extender - 1.25"

Instantly triples the magnification of any 1.25" eyepiece Telecentric optical design provides consistent magnification Maintains the eye relief of...

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CA$195.99 - CA$195.99
CA$195.99
CA$195.99 - CA$195.99
CA$195.99
CA$251.99 - CA$251.99
CA$251.99
CA$251.99 - CA$251.99
CA$251.99

Explore Scientific 3X Focal Extender - 2"

Provides 3X magnification for any 2" or 1.25" eyepiece Telecentric optical design ensures consistent magnification Fully EMD-coated optics for max...

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