• Explore Scientific 72° ED Series 8.5mm Waterproof Eyepiece
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Explore Scientific

Explore Scientific 72° ED Series 8.5mm Waterproof Eyepiece [EPWP7285ED-01]

Explore Scientific 72° ED Series 8.5mm Waterproof Eyepiece [EPWP7285ED-01]

$299.99
$299.99
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Shipping calculated at checkout.

Premium ED glass. Wide 72° field. A versatile all-rounder.

The Explore Scientific 72° ED Series 8.5mm Waterproof Eyepiece hits the sweet spot between magnification and field of view. With genuine HOYA FCD1 extra-low dispersion glass, a wide immersive 72° apparent field, and a fully argon-purged waterproof housing, it excels across a wide range of targets — from planetary detail to sweeping star fields and open clusters.

Why the 72° ED Series Stands Out

  • HOYA FCD1 ED glass virtually eliminates chromatic aberration for razor-sharp, color-true views
  • Wide 72° apparent field of view delivers an immersive, stadium-like observing experience
  • Long eye relief makes it comfortable for extended sessions — including for eyeglass wearers
  • EMD multi-layer coatings on all surfaces maximize contrast and light transmission
  • Edge-blackened optics minimize internal reflections and scatter for a clean, dark background

Waterproof & Built to Last

  • Argon-purged and O-ring sealed — impervious to internal fogging and moisture
  • Argon's larger atomic size means a more stable internal environment than nitrogen-purged designs
  • Anodized aluminum housing stands up to years of use in any weather conditions
  • Easy to clean interior and exterior thanks to the sealed design

Best Used For

  • Mid-to-high power planetary and lunar observing
  • Open clusters, double stars, and planetary nebulae
  • A versatile step-up from lower-power wide-field eyepieces
  • Upgrading from a stock eyepiece on any Sidara, FirstLight, or ES refractor or reflector

SPECS

Specification Details
SKU EPWP7285ED-01
Apparent Field of View 72°
Focal Length 8.5mm
Barrel Size 1.25"
Glass Type HOYA FCD1 Extra-Low Dispersion (ED)
Coatings EMD multi-layer on all air-to-glass surfaces
Waterproof Yes — argon-purged, O-ring sealed
Eye Relief Long eye relief
Eyecup Foldable rubber
View full details

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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