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Explore Scientific 82° Series 18mm Waterproof Eyepiece

SKU EPWP8218-01
Original price $0.00 - Original price $0.00
Original price $0.00
$319.99 - $319.99
Current price $319.99
In stock

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Explore Scientific 82 Degree Series 18mm Waterproof Eyepiece - EPWP8218-01

Introducing the Explore Scientific 82° Series 18mm Waterproof Argon-Purged Eyepiece, a sought-after focal length in the upper-medium power magnification category.

This eyepiece offers an expansive apparent field and ample eye relief, making it ideal for applications requiring increased power.

It excels in observing globular star clusters, planetary nebulae, the intricate cloud formations surrounding comet nuclei, initial planetary observations, and, when equipped with proper solar filtration on your telescope, active regions on the sun.

Combine it with Explore Scientific Focal Extenders for 2X, 3X, or 5X magnification boosts while preserving the eyepiece's native apparent field and eye relief.

Crafted through advanced computer design and employing a blend of low dispersion and high refractive index optical elements, as well as robust enhanced multilayer deposition (EMD) coatings, Explore Scientific's 82° Series 18mm super wide field eyepieces are engineered for optimum contrast, resolution, and a superior flat field.

The visual immersion provided by this eyepiece, featuring generous eye relief and an 82° apparent field, is truly extraordinary.

Your eye remains at ease, facilitating the use of the "averted vision" technique to scrutinize faint details across an expansive field of view.

Each eyepiece undergoes meticulous assembly into precision-machined metal lens barrels, ensuring enduring alignment of the optical system for years of robust field use.

To minimize internal reflections, all internal surfaces of the eyepiece barrel, as well as the edges of the lenses, are finished in a non-reflective black.

Experience Comfort, Quality, and Value with Explore Ultra-Wide Eyepiece.

Explore Scientific 82° Series Waterproof Eyepiece

The Explore Scientific 82° Series 18mm eyepiece, boasting an 82° apparent field of view, envelop you in a comfortably expansive field that naturally induces relaxation at the eyepiece.

This relaxed state enhances your capacity for prolonged observation, revealing details that might have eluded you at first glance.

Another notable advantage of ultra-wide eyepieces is their facilitation of averted vision, a technique in which you observe slightly to either side of an object, rather than directly at it.

This technique is particularly valuable when discerning faint objects, as it places the image on a more light-sensitive part of your eye, enabling you to perceive fainter details.



  • 82° Apparent Field of View: The Explore Scientific 82° Series 18mm Waterproof Eyepiece offers an expansive 82-degree apparent field of view. Immerse yourself in a wide celestial expanse, elevating your visual experience and allowing for sweeping vistas of the night sky.
  • 18mm Focal Length: Boasting an 18mm focal length, this eyepiece brings versatility to various astronomical observations. Striking a harmonious balance between magnification and field of view, it is well-suited for studying an array of celestial objects, from the Moon and planets to mesmerizing deep-sky wonders.
  • Advanced Optical Design: This eyepiece employs cutting-edge computer-aided design and integrates a blend of low dispersion and high refractive index optical elements. This sophisticated arrangement minimizes chromatic aberration and guarantees exceptional image quality with enhanced color accuracy.
  • Durable Multilayer Deposition Coatings: Robust multilayer deposition coatings (EMD coatings) grace the lens surfaces of this eyepiece. These coatings optimize light transmission, diminish internal reflections, and amplify contrast, resulting in sharp, high-contrast celestial views.
  • Argon-Purged Waterproof Design: Engineered with an Argon-purged construction, this eyepiece is waterproof and hermetically sealed against environmental elements. It remains impervious to internal fogging, even in damp conditions. Argon gas provides superior sealing properties compared to Nitrogen, reducing the risk of long-term leakage.
  • High Contrast and Resolution: The Explore Scientific 82° Series 18mm Eyepiece is meticulously optimized to deliver heightened contrast and resolution. This optical excellence is paramount for detailed examinations of celestial objects, encompassing lunar features, planets, and deep-sky phenomena.
  • Superior Flat Field Characteristics: This eyepiece upholds superb flat field characteristics, ensuring that stars maintain their sharpness and pinpoint appearance throughout the entire field of view. This attribute proves invaluable for both astrophotography and intricate visual observations.
  • Long Eye Relief: With generous eye relief, this eyepiece guarantees comfort during extended observing sessions. This extended eye relief is especially appreciated by observers who wear eyeglasses, enabling relaxed viewing without undue eye strain.
  • Parfocal Design: The eyepiece maintains nearly identical focus across various focal lengths, facilitating seamless transitions when switching between different eyepieces. This parfocal design streamlines the observing process, eliminating the need for frequent refocusing.
  • Removable and Foldable Soft Silicone Rubber Eyecup: The eyepiece is equipped with a soft silicone rubber eyecup that can be easily removed and folded. This feature enhances observer comfort during prolonged viewing sessions, providing a cushioned interface between the observer's eye and the eyepiece.
  • Rigorous Water Testing: Each eyepiece undergoes comprehensive water testing, enduring submersion in one meter of water for 30 minutes. This testing ensures an impeccable seal and instills confidence in the eyepiece's waterproofing capabilities.
  • Included Accessories: The accessory set accompanying the Explore Scientific 82° Series 18mm Waterproof Eyepiece includes protective eyepiece caps, comfortable soft silicone rubber eyecups, a secure eyepiece pouch/case for storage, and is complemented by a limited 1-year warranty, ensuring heightened peace of mind for users.

                                                                    Explore Scientific Eyepiece Guide Video:


                                                                    What's Included:

                                                                    ✓ Explore Scientific 82° Series 18mm Waterproof Eyepiece

                                                                    ✓ Eyepiece Caps

                                                                    ✓ Soft Silicone Rubber Eyecups

                                                                    ✓ Eyepiece Pouch/Case

                                                                    ✓ Limited 1 year warranty



                                                                    Item Number  EPWP8218–01
                                                                    Focal Length  18mm
                                                                    Length  89mm
                                                                    Width  56mm
                                                                    Weight  13.7oz; 390g
                                                                    Barrel Size  2.00"
                                                                    Eye Relief  13mm
                                                                    Field Stop Diameter  25.3mm

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