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Explore Scientific

Explore Scientific 100° 2-Inch Waterproof Argon-Purged Eyepiece Series – 5.5mm, 9mm, 14mm, 20mm, 25mm, 30mm

Explore Scientific 100° 2-Inch Waterproof Argon-Purged Eyepiece Series – 5.5mm, 9mm, 14mm, 20mm, 25mm, 30mm

$999.99
$999.99
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The Explore Scientific 100° Argon-Purged Waterproof Eyepiece Series delivers one of the widest and most immersive viewing experiences available for amateur astronomy. Engineered for premium performance, these eyepieces provide an expansive 100-degree apparent field of view—ideal for deep-sky sweeping, rich lunar detail, planetary observing, and large nebula structures.

Each model features fully multi-coated optics, edge-blackened lenses, and long eye relief for enhanced comfort and clarity. Waterproof and argon-purged construction ensures long-term protection against moisture, internal fogging, dust, and contaminants, preserving superior optical performance in any environment.

With variants ranging from 5.5mm to 30mm, the 100° Series offers a complete wide-field solution for telescopes with 2-inch focusers, covering high-power detail work through ultra-wide low-power scanning.

Features

  • 100° apparent field of view for unmatched wide-field immersion

  • Argon-purged waterproof housing for long-term optical protection

  • Fully multi-coated lenses maximize brightness and contrast

  • Long eye relief for comfortable extended observation

  • Edge-blackened optics reduce internal reflections

  • 2-inch barrel format supports large true fields of view

  • Engineered for deep-sky, lunar, planetary, and wide-field observing

Specifications (Applies to All Variants)

  • Barrel Size: 2-inch O.D.

  • Apparent Field of View: 100°

  • Optical Coatings: Fully Multi-Coated

  • Waterproof: Yes

  • Gas Purging: Argon

  • Lens Edges: Blackened

  • Eye Relief: Long eye relief design

Variant Specifications Table

Focal Length Eye Relief Barrel Size AFOV Waterproof Notes
5.5mm Long ER 2 in 100° Yes High-power planetary and lunar detail; crisp magnification
9mm Long ER 2 in 100° Yes Ideal for medium–high power deep-sky and planetary observing
14mm Long ER 2 in 100° Yes Excellent balance of magnification and field for general observing
20mm Long ER 2 in 100° Yes Wider deep-sky views with strong contrast
25mm Long ER 2 in 100° Yes Low-power, bright wide-field scanning of large nebulae and star clusters
30mm Long ER 2 in 100° Yes Maximum field experience for sweeping the Milky Way
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Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
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All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
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