• Explore Scientific 52° Argon-Purged 1.25-Inch Eyepiece Series — Fully Multi-Coated Eyepieces for Planetary Viewing
  • Explore Scientific 52° Argon-Purged 1.25-Inch Eyepiece Series — view 2
  • Explore Scientific 52° Argon-Purged 1.25-Inch Eyepiece Series — view 3
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Explore Scientific

Explore Scientific 52° Argon-Purged 1.25-Inch Eyepiece Series — Fully Multi-Coated Eyepieces for Planetary and General-Purpose Viewing

Explore Scientific 52° Argon-Purged 1.25-Inch Eyepiece Series — Fully Multi-Coated Eyepieces for Planetary and General-Purpose Viewing

$69.99
$119.99 $69.99
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Size

The Explore Scientific 52° Argon-Purged Eyepiece Series is a versatile line of 1.25-inch telescope eyepieces built for planetary detail and everyday general-purpose viewing. The 52° apparent field of view gives a natural, comfortable window on the sky, and the wide range of focal lengths — from high-power 3mm to wide 40mm — lets you dial in the right magnification for almost any target.

Enhanced Multi-Layer Deposition (EMD) coatings on every surface maximize brightness, contrast, and color fidelity, while argon-purging and O-ring seals keep moisture and internal fogging out on damp nights.

Who it's for

Beginner and intermediate stargazers who want a dependable, well-priced eyepiece set for the Moon, planets, double stars, and brighter deep-sky objects. The consistent 52° field makes it easy to build out a matched set. New to eyepieces? See our guide on how to pick the proper telescope eyepiece.

Key features

  • 52° apparent field of view — a natural, immersive view across all focal lengths
  • EMD (Enhanced Multi-Layer Deposition) coatings for bright, high-contrast images
  • Argon-purged and O-ring sealed to prevent internal fogging and moisture
  • Parfocal series design — minimal refocusing when you swap eyepieces
  • Stainless steel barrel with safety undercut for secure mounting
  • Standard 1.25" barrel fits most telescopes and accepts 1.25" filters

Choosing your focal length

Short focal lengths (3–6.5mm) give high magnification for planets and the Moon; mid lengths (10–20mm) are the everyday workhorses; longer lengths (25–40mm) give low-power, wide views for star clusters and nebulae. A short, a medium, and a long eyepiece will cover most nights.

Specifications

Focal length Apparent field Eye relief (approx.) Barrel
3 mm 52° ~15 mm 1.25"
4.5 mm 52° ~15 mm 1.25"
6.5 mm 52° ~16 mm 1.25"
10 mm 52° ~16 mm 1.25"
15 mm 52° ~16 mm 1.25"
20 mm 52° ~15 mm 1.25"
25 mm 52° ~16 mm 1.25"
30 mm 52° ~19 mm 1.25"
40 mm 52° ~27 mm 1.25"

Eye relief values are approximate and vary by focal length. All models are argon-purged, waterproof, and fully multi-coated.

Frequently asked questions

Will these fit my telescope?
Yes, if your telescope or diagonal takes standard 1.25" eyepieces — the vast majority do. The barrels also accept 1.25" filters.

What's the difference between the 52° and 62° series?
The 62° series shows a slightly wider field of view; the 52° series is a more compact, value-focused option that excels at planetary and general viewing. Both use sealed, argon-purged, multi-coated optics.

What does "parfocal" mean?
Parfocal eyepieces stay close to focus when you swap between them, so you only need a small tweak instead of refocusing from scratch — handy when changing magnification on a target.

Which focal length should I start with?
A 15–20mm is the most versatile first choice. Add a 6.5mm or shorter for high-power planetary detail once you're comfortable.

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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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