• Explore Scientific 72° ED 8.5mm Waterproof Eyepiece — Medium-High Power Views of Planets and Moon
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Explore Scientific

Explore Scientific 72° ED 8.5mm Waterproof Eyepiece — Medium-High Power Views of Planets and Moon

Explore Scientific 72° ED 8.5mm Waterproof Eyepiece — Medium-High Power Views of Planets and Moon

$299.99
$299.99
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The Explore Scientific 72° ED 8.5mm is a premium telescope eyepiece that delivers medium-to-high magnification with a wide, immersive 72° field of view. An eyepiece controls how much your telescope magnifies — this 8.5mm sits in the sweet spot for detailed views of the Moon, planets and tighter deep-sky objects — while the generous field keeps targets easy to frame and follow.

Extra-low-dispersion (ED) glass keeps colours tightly focused for sharp, high-contrast detail, and the eyepiece is fully waterproof and argon-purged so it won't fog internally in cold or damp conditions.

Who it's for: Observers who want sharp medium-high-power views of the Moon and planets with a wide, comfortable field. Not sure which focal length to pick? Read our guide to choosing the proper telescope eyepiece.

  • 72° apparent field: a wide, immersive view that makes objects feel natural to follow.
  • ED glass optics: extra-low-dispersion elements for sharp, colour-corrected detail.
  • Versatile 8.5mm: medium-high power for planets, the Moon and compact deep-sky targets.
  • Waterproof & argon-purged: sealed against fogging and moisture for all-weather use.
  • Comfortable eye relief: designed for relaxed viewing, including for eyeglass wearers.
Specifications
Series 72° ED Waterproof
Focal length 8.5mm
Apparent field of view 72°
Glass Extra-low-dispersion (ED)
Sealing Waterproof, argon-purged
Barrel size 1.25"

What magnification will I get?
Divide your telescope's focal length by 8.5. For example, a 900mm scope gives about 106x with this eyepiece.

What is a 72° apparent field of view?
It's how wide the view appears through the eyepiece; 72° is a generously wide field that makes objects feel immersive and easier to track.

Why does ED glass matter in an eyepiece?
Extra-low-dispersion glass controls colour and improves sharpness, especially toward the edge of the field and at higher power.

Does it fit my telescope?
It uses a standard 1.25" barrel, compatible with the vast majority of telescopes and diagonals.

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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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