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Explore Scientific 92° Series 17mm LER Waterproof Eyepiece

SKU EPWP9217-01
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Original price $0.00 - Original price $0.00
Original price $0.00
$1,080.00 - $1,080.00
Current price $1,080.00
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Explore Scientific 92 Degree Series 17mm LER Waterproof Eyepiece - EPWP9217-01

Discover the esteemed Explore Scientific 92° Series 17mm LER Waterproof Eyepiece - honored with the prestigious Sky & Telescope Hot Product Award in 2017!

Elevate your celestial exploration with this exceptional ocular from Explore Scientific's renowned 92° Series.

These hyper-wide class eyepiece are meticulously crafted to redefine your cosmic journey.

The initial gaze through the ES 92° Series 17mm LER Eyepiece is nothing short of awe-inspiring, immersing you in a boundless expanse of celestial wonders, removing any perceptible barrier between you and the universe itself.

With an apparent field of view approaching the upper limits of hyper-wide eyepiece design, locating objects becomes effortless.

Even in non-driven telescopes, celestial entities remain comfortably within view for extended periods before any adjustments are needed.

Explore Scientific 92° Series 12mm Waterproof Eyepiece

One of the most remarkable features of the 92° Series 17mm LER Eyepiece is its facilitation of averted vision - subtly shifting your gaze away from the object of interest.

This technique, capitalizing on the more light-sensitive part of your eye, proves invaluable for discerning delicate details on faint celestial objects.

Crafted with precision and incorporating advanced optical technology, the Explore Scientific 92° Series 17mm LER Waterproof Eyepiece attests to the brand's dedication to providing astronomers with unparalleled viewing experiences.

Whether you're a seasoned stargazer or an enthusiastic beginner, this eyepiece is poised to elevate your observations to new heights.



  • 92° Apparent Field of View: Immerse yourself in a remarkable 92-degree apparent field of view, offering an expansive and captivating perspective of the night sky. This wide field enriches your visual encounter, enabling the capture of sweeping celestial panoramas.
  • 17mm Focal Length: Striking a harmonious balance between magnification and field of view, the 17mm focal length proves versatile and well-suited for a diverse range of astronomical observations. It excels in detailed lunar and planetary examinations, as well as exploration of deep-sky phenomena.
  • Long Eye Relief (LER): Designed with observers who wear eyeglasses in mind, this eyepiece features Long Eye Relief (LER). This extended eye relief fosters relaxed and immersive stargazing sessions, eliminating the need to remove eyeglasses and enhancing the overall observing experience.
  • Argon-Purged Waterproof Design: Internally sealed and purged with dry, inert argon gas, this innovative design ensures the eyepiece's waterproof integrity. This construction fortifies durability and longevity, rendering it suitable for various observing conditions, shielding against moisture or fogging effects on optical elements.
  • Rigorous Water Testing: Undergoing extensive submersion in water up to one meter for 30 minutes, this eyepiece's waterproof capabilities are rigorously validated. This testing regimen instills confidence in its resilience to diverse environmental conditions, including damp or humid observing environments.
  • Fully Multi-Coated Optics: Each optical element boasts multiple layers of anti-reflective coatings. These coatings optimize light transmission, minimizing glare, reflections, and internal scattering. The result is exceptionally vivid and luminous views of celestial objects, marked by enhanced contrast.
  • Edge-Blackened Optics: The optical elements undergo edge-blackening, a process that heightens image quality. This refinement diminishes internal reflections and stray light, culminating in amplified contrast and sharper image definition. The eradication of unwanted light artifacts ensures celestial objects appear with exceptional clarity.
  • Precision-Machined Metal Construction: Crafted with meticulous attention to detail and featuring precision-machined metal components, this eyepiece exemplifies durability and longevity. It stands as a reliable companion for years of stargazing expeditions, maintaining optical alignment for consistent performance over time.
  • Threaded Barrels: The eyepiece barrels are thoughtfully threaded to accommodate filters, affording users the opportunity to enhance observations with various astronomy filters. This feature empowers astronomers to tailor their viewing experience and adapt to specific celestial targets and conditions.
  • Wide Compatibility: Compatible with an array of telescope types and mounts, this eyepiece proves a versatile addition to any astronomer's equipment repertoire. Whether equipped with a refractor, reflector, or catadioptric telescope, this eyepiece promises remarkable views of the cosmos.
  • Included Accessories: The accessory ensemble accompanying the Explore Scientific 92° Series 17mm LER 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.

                                                                            What's Included:

                                                                            ✓ Explore Scientific 92° Series 17mm LER Waterproof Eyepiece

                                                                            ✓ Eyepiece Caps

                                                                            ✓ Soft Silicone Rubber Eyecups

                                                                            ✓ Eyepiece Pouch/Case

                                                                            ✓ Limited 1 year warranty


                                                                            Item Number  EPWP9217–01
                                                                            Focal Length  17mm
                                                                            Length  152mm
                                                                            Width  69.8mm
                                                                            Weight  2.87 lbs
                                                                            Barrel Size  2.00"
                                                                            Eye Relief  20.02mm
                                                                            Field Stop Diameter  27.46mm

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