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Explore Scientific 10mm 52° Series Waterproof Eyepiece

SKU ES5210

Manufacturer Part # EPWP5210-01

Original price $0
Original price $119.99 - Original price $119.99
Original price
Current price $119.99
$119.99 - $119.99
Current price $119.99
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Explore Scientific 10mm 52° Series Argon-Purged Eyepiece

For astronomers who value precision, contrast, and durability in a compact form, the Explore Scientific 10mm 52° Series Eyepiece is an excellent choice. Designed for mid- to high-power observations, this eyepiece delivers sharp, high-contrast views with excellent light transmission, making it ideal for planetary, lunar, and deep-sky observing.

Precision Optics for Planetary and Deep-Sky Observing

With a 52-degree apparent field of view, this eyepiece provides a well-framed and immersive view while maintaining excellent edge sharpness. While not classified as a wide-field eyepiece, the 52-degree design balances a natural viewing experience with enhanced contrast, making it ideal for studying fine details on the Moon, resolving planetary features, and examining deep-sky objects with precision.

The 10mm focal length makes this eyepiece particularly useful for mid- to high-magnification observations. Whether you’re tracking the cloud bands of Jupiter, resolving Saturn’s Cassini Division, or splitting double stars, this eyepiece offers outstanding performance with pinpoint stars across the field.

Fully Multi-Coated Optics for Maximum Contrast

Every air-to-glass surface is treated with Enhanced Multi-Layer Deposition (EMD) coatings to minimize reflections and maximize light transmission. The result is a bright, high-contrast image with minimal ghosting or glare, allowing for optimal viewing of fainter deep-sky objects as well as crisp planetary details.

Argon Purging for Superior Durability

Unlike many eyepieces that use nitrogen purging, Explore Scientific employs argon gas, which has larger molecules that resist leakage over time. The eyepiece is fully waterproof, preventing internal fogging and protecting against dust and moisture, ensuring long-term optical stability and performance. This also makes it highly resistant to temperature fluctuations—perfect for those who observe in humid or cold environments.

Comfortable Eye Relief and Thoughtful Design

With 15mm of eye relief, this eyepiece is comfortable to use for extended observing sessions, even for those who wear glasses. The fold-down rubber eyecup provides additional comfort and helps block stray light for a more immersive experience.

The black anodized aluminum barrel is built for durability, while the rubber grip ring offers a secure hold, even in colder temperatures when gloves are necessary. The 1.25-inch barrel ensures compatibility with a wide range of telescopes, diagonals, and Barlow lenses.

An Affordable, High-Quality Eyepiece for Serious Observers

The Explore Scientific 10mm 52° Series Eyepiece is an outstanding choice for those looking to enhance their planetary and deep-sky observations with high-quality optics in a durable, weatherproof design. Whether you’re upgrading from stock eyepieces or expanding your collection, this 10mm eyepiece delivers excellent clarity and performance at an affordable price point.

Specifications at a Glance:

  • Focal Length: 10mm
  • Apparent Field of View: 52°
  • Eye Relief: 15mm
  • Optical Coatings: Fully Multi-Coated (EMD)
  • Gas Purging: Argon-Purged & Waterproof
  • Barrel Size: 1.25-inch
  • Weight: 6.7 oz (190g)

For those seeking a sharp, contrast-rich, and durable eyepiece, the Explore Scientific 10mm 52° Series is a solid investment that delivers exceptional performance for planetary and deep-sky observations.

Tech Details: 

Item Number EPWP5210–01
Focal Length 10mm
Length 83mm
Width 43mm
Weight 181.4 grams; 6.4 oz.
Barrel Size/Type 1.25" O.D. / Double Taper
Eye Relief 16.6mm
Field Stop Diameter: 9.1mm
Coatings EMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces
Lens Elements/ Groups 6 Elements in 3 Groups; Edge Blackened
Filter Thread Fits Standard 1.25-inch Dia. Thread in Filters (1.125-inches x 42 TPI)
Waterproof O-Ring Sealed Argon Gas Purged; Tested Under 1 Meter of Water for 30 Minutes
Eyecup Removable Flip-Down Style Soft Silicone Rubber
Lens Caps Slide-on Top and Bottom
Materials Optical Glass; Aluminum; Steel; Silicone Rubber
Markings Laser Engraved: Focal Length; Series; Serial Number; Brand

 

Barrel Size 1.25"
Eye Relief 16.6mm
Field of view 52°
Field Stop 9.1mm
Focal Length 10mm
Number of optical elements 6
Weight 6.4 oz
Warranty 1 year

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