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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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Original price $19.99 USD - Original price $19.99 USD
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Explore Scientific Giant Binoculars Finder Adapter

Attaches a Finder Scope Base to Explore Scientific Giant Binoculars Enables Accurate Pointing and Target Acquisition Requires Explore Scientific H...

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Original price $249.99 USD - Original price $249.99 USD
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Explore Scientific HR Variable Coma Corrector (2-inch)

Corrects for off-axis coma in Newtonian reflectors Designed for 2-inch focusers Variable spacer with markings for fine-tuning EMC (Enhanced Multil...

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Original price $249.99 USD - Original price $249.99 USD
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Original price $39.99 USD - Original price $39.99 USD
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Explore Scientific Hybrid Finder Scope Base

Accepts Explore Scientific, Vixen, Synta, and Celestron-style finder brackets Rugged, all-metal construction with a black-anodized finish Integrat...

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Original price $69.99 USD - Original price $69.99 USD
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Explore Scientific iEXOS-100 Azimuth Adjuster Adapter

Enables fine azimuth adjustments for the iEXOS-100 mount Essential for achieving precise polar alignment Improves tracking accuracy for long-expos...

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Original price $69.99 USD - Original price $69.99 USD
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Original price $19.99 USD - Original price $19.99 USD
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Explore Scientific iEXOS-100 Counterweight 2.2 Pounds - Black

2.2 Pound (1 kg) Counterweight Designed for the Explore Scientific iEXOS-100 Mount Ideal for Balancing Lightweight Telescopes and Cameras Secure L...

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Original price $99.99 USD - Original price $99.99 USD
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Explore Scientific iEXOS-100 Polar Finder and Adapter

Enables Precise Polar Alignment for Astrophotography Designed Specifically for the Explore Scientific iEXOS-100 Mount Illuminated Reticle for Easy...

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Original price $699.99 USD - Original price $699.99 USD
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Explore Scientific iEXOS-100-02 HD PMC-Eight Equatorial Tracker System

German equatorial GoTo tracking system Approx. 9 lb equipment capacity (15 lb photographic incl. counterweights) PMC-Eight controller with WiFi, B...

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Original price $699.99 USD - Original price $699.99 USD
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Original price $299.99 USD - Original price $299.99 USD
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Explore Scientific iEXOS-100-02 PMC-Eight Equatorial Tracker System

PMC-Eight Precision Motion Control GoTo System Integrated WiFi and Bluetooth for Wireless Operation ExploreStars App for Tablet-Based Sky Navigati...

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Original price $79.99 USD - Original price $79.99 USD
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Explore Scientific Illuminated Polar Finder

Enables Precise Polar Alignment for Astrophotography Features an Illuminated Reticle with Polar Assist Markings Essential Upgrade for Eliminating ...

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Original price $59.99 USD - Original price $59.99 USD
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Explore Scientific Illuminator II for Finder Scopes

Replaces standard finder illuminators Powered by two common AAA batteries (not included) Variable brightness control from dim to bright Weight: 1....

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Explore Scientific M42x0.75 Adapter for FFEDAPO

Connects cameras to the Explore Scientific FFEDAPO Field Flattener Provides standard male M42x0.75 T-threads Accepts standard DSLR/mirrorless T-Ri...

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Original price $36.99 USD - Original price $36.99 USD
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Explore Scientific M48x0.75 Adapter for FFFR

Connects M48 (2-inch filter thread) accessories to the Explore Scientific 3" 0.7x Reducer Replaces the standard M42 T-thread adapter included with...

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Original price $36.99 USD - Original price $36.99 USD
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Explore Scientific M48x1 Adapter for FFEDAPO

Connects M48x1 accessories to the FFEDAPO Field Flattener Provides a larger aperture than standard M42 T-threads Designed for Explore Scientific's...

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Explore Scientific Medium-Vixen Style Saddle Plate

Vixen-Style Mounting Profile Solid Extruded Aluminum Construction Black Anodized Finish for Durability Medium Length for Versatile Balancing Light...

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Original price $10.99 USD - Original price $10.99 USD
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Explore Scientific Moon Crater Map (2-Sided)

2-Sided Lunar Reference Map Side 1: Pinpoints Key Observable Features Side 2: Marks Historic Spacecraft Landing Sites Designed as a Companion for ...

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Original price $109.99 USD - Original price $119.99 USD
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Explore Scientific Nebula Filter CLS - 1.25" & 2"

City Light Suppression (CLS) Filter Enhances Contrast for Deep-Sky Objects Available in 1.25" and 2" Sizes Ideal for Viewing Nebulae and Galaxies ...

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Original price $109.99 USD - Original price $119.99 USD
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Original price $159.99 USD - Original price $159.99 USD
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Explore Scientific Nebula Filter H-Alpha 1.25-inch 12nm

Targets Hydrogen-Alpha emission nebulae 12nm bandpass for astrophotography 1.25-inch standard filter size Drastically improves contrast under ligh...

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Original price $159.99 USD - Original price $159.99 USD
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Original price $249.99 USD - Original price $249.99 USD
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Explore Scientific Nebula Filter H-Alpha 2-inch 12nm

Isolates the Hydrogen-alpha emission line at a 12nm bandpass Standard 2-inch filter format for modern focusers and filter wheels Dramatically incr...

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Original price $249.99 USD - Original price $249.99 USD
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Explore Scientific Nebula Filter H-Alpha 2-inch 7nm

7nm H-Alpha Bandpass 2-inch Filter Format Isolates Hydrogen Emission Nebulae Blocks Urban Light Pollution Includes Individual Test Report Descr...

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Original price $179.99 USD - Original price $179.99 USD
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Explore Scientific Nebula Filter H-Beta - 2.0"

2.0-inch Barrel Size Isolates Hydrogen-Beta (H-Beta) Emission Line Dramatically Increases Contrast on Specific Nebulae Blocks Artificial Light Pol...

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Original price $179.99 USD - Original price $179.99 USD
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Original price $159.99 USD - Original price $159.99 USD
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Explore Scientific Nebula Filter S-II 1.25-inch 12nm

Isolates the ionized sulfur (S-II) emission line at 672nm Features a 12nm bandpass to increase contrast Standard 1.25-inch filter format Ideal for...

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Original price $159.99 USD - Original price $159.99 USD
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Original price $199.99 USD - Original price $199.99 USD
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Explore Scientific Nebula Filter S-II 1.25-inch 6.5nm

Isolates the ionized sulfur (S-II) emission line at 672nm Ultra-narrow 6.5nm bandpass for maximum contrast Standard 1.25-inch barrel size fits mos...

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Original price $199.99 USD - Original price $199.99 USD
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Original price $249.99 USD - Original price $249.99 USD
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Current price $249.99 USD

Explore Scientific Nebula Filter S-II 2-inch 12nm

Isolates the 672nm Sulfur-II (S-II) emission line 12nm bandpass for high-contrast views 2-inch filter size with standard threads Blocks light poll...

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Original price $249.99 USD - Original price $249.99 USD
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$249.99 USD
$249.99 USD - $249.99 USD
Current price $249.99 USD
Original price $299.99 USD - Original price $299.99 USD
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Current price $299.99 USD

Explore Scientific Nebula Filter S-II 2-inch 6.5nm

6.5nm Narrow Bandpass Targets the 672nm Ionized Sulfur (S-II) Emission Line 2-inch Barrel Diameter for Larger Focusers Drastically Increases Contr...

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Original price $299.99 USD - Original price $299.99 USD
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$299.99 USD - $299.99 USD
Current price $299.99 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.