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Explore Scientific 100 Degree Series 20mm Nitrogen-Purged Waterproof Eyepiece, Fully Multi-coated, 2" Barrel

SKU: ESWP10020 MFR: EPWP10020-00
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Key Features

  • Experience expansive views with this 20mm eyepiece, boasting a super-wide 100° field of view.
  • Enjoy comfortable, long observing sessions thanks to the generous 14.5mm eye relief on this eyepiece.
  • Nitrogen-purged and waterproof, this Explore Scientific eyepiece is ready for any stargazing adventure.
  • See stunning, high-contrast images with fully multi-coated optics for maximum light transmission.
  • The 2" barrel size makes this 20mm eyepiece compatible with a wide range of telescopes.
  • Built to last with premium materials, this eyepiece delivers sharp images and exceptional build quality.
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Special Order?Estimated to Ship: 09/02/2025
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Shopper : Why Did You Choose This?STEVEN S : I needed a low power wide field eyepiece for my 9" f/3

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Explore Scientific 100 Deg 20mm Nitrogen-Purged Waterproof Eyepiece, 2" Barrel Specifications

  • Focal Length

    20mm

  • Barrel Size

    2" (50.8mm)

  • Apparent Field of View

    100deg.

  • Eye Relief

    14.5mm

  • Field stop diameter

    34.8mm / 1.37"

  • Filter Threads

    Standard 2" (M48 x 0.75) Filter Thread

  • Coatings

    EMD (Enhanced Multilayer Deposition) Coatings

  • Lens Elements

    9

  • Blackened Lens Edges

    Yes

  • Barrel Safety Recess

    Yes

  • Barrel Type

    Tapered barrel

  • Optical Design

    Combination of: Dense Crown, Light Crown, Dense Flint and Lanthanum Optical Glasses

  • End Caps

    2

  • Rubber Eye Guard

    Rubber Folding Type

  • Size (L x W)

    156.0 x 70.0mm / 6.14 x 2.76"

  • Weight

    38.1oz / 1080.12g

  • UPC Code

    812257014712

About Explore Scientific 100 Deg 20mm Nitrogen-Purged Waterproof Eyepiece, 2" Barrel

Take your stargazing experience to new heights with the Explore Scientific 100 Degree Series 20mm Nitrogen-Purged Waterproof Eyepiece. Expertly crafted using advanced computer design techniques, this eyepiece combines low dispersion and high refractive index optical glasses to deliver high contrast, high resolution, and superior flat field characteristics.

This 2" barrel eyepiece is more than just a tool for viewing the cosmos; it's a rugged, waterproof companion designed to withstand the challenges of the outdoor environment. Its nitrogen-purged construction ensures internal fogging is a thing of the past, while also preventing the intrusion of fine particulates and fungus. This maximizes the life of the internal coatings, ensuring your eyepiece delivers clear, crisp images for years to come.

Experience the full-immersion visual effect of this eyepiece, complete with long eye-relief and a 100-degree apparent field. The lens elements are meticulously cleaned, aligned, and installed in precision-machined lens barrels for optimal performance. Each lens and lens grouping features Enhanced Multilayer Deposition (EMD) Coatings and are edge-blackened to eliminate light scatter and maintain image contrast.

Further enhancing contrast, the eyepiece includes baffles that mask and deflect unwanted stray light. To ensure its waterproof integrity, each eyepiece is tested by submerging it in 1 meter of water for 30 minutes. The Explore Scientific 100 Degree Series 20mm Nitrogen-Purged Waterproof Eyepiece is more than just an eyepiece; it's your ticket to exploring the universe in stunning detail.

Explore Scientific 100 Deg 20mm Nitrogen-Purged Waterproof Eyepiece, 2" Barrel Features

  • 20mm Focal Length
  • 100 Degree Field of View
  • 2" Diameter Barrel
  • Argon-Filled, Water and Fogproof
  • Easy-Insertion Double-Tapered Barrel
  • Fully Multicoated Optics
  • Slip-Resistant Textured Surface
  • Fold-Down Eyecup

Key Features

  • Experience expansive views with this 20mm eyepiece, boasting a super-wide 100° field of view.
  • Enjoy comfortable, long observing sessions thanks to the generous 14.5mm eye relief on this eyepiece.
  • Nitrogen-purged and waterproof, this Explore Scientific eyepiece is ready for any stargazing adventure.
  • See stunning, high-contrast images with fully multi-coated optics for maximum light transmission.
  • The 2" barrel size makes this 20mm eyepiece compatible with a wide range of telescopes.
  • Built to last with premium materials, this eyepiece delivers sharp images and exceptional build quality.

What's in the box:

  • Explore Scientific 100°-Series 20mm Eyepiece (2")
  • Explore Scientific 1 Year Warranty (Extendable to Lifetime Warranty with Registration)