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Explore Scientific 120° Series 9mm Waterproof Eyepiece

SKU EPWP12009-01
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Original price $0.00 - Original price $0.00
Original price $0.00
$1,299.99 - $1,299.99
Current price $1,299.99
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Explore Scientific 120 Degree Series 9mm Waterproof Eyepiece - EPWP12009-01

Presenting the Explore Scientific 120° Series 9mm Waterproof Eyepiece, a true standout in its category.

The 120° apparent field of view offers an unparalleled observational experience, setting it apart from any other eyepiece you've encountered.

While conventional hyper-wide field eyepieces provide a sweeping view of the night sky at lower magnifications, the 9mm 120° takes it a step further.

Not only do you capture an expansive celestial canvas, but you also get an up-close and personal encounter with the focal point of interest, whether it be a nebula, galaxy, or star cluster.

It's the perfect fusion of both worlds, delivering an extraordinary viewing experience.

One remarkable feature of this eyepiece is its ability to keep objects within the field of view for an extended duration.

This becomes particularly evident when using telescopes without a drive, such as a Dobsonian or a refractor mounted on a grab-and-go like the Explore Scientific Twilight I.

Additionally, hyper-wide eyepieces offer the distinct advantage of effortless off-center gazing.

This technique, known as averted vision, proves invaluable when observing faint objects.

By directing your gaze slightly to either side of the object, averted vision places the image on a more light-sensitive part of your eye, revealing fainter details with remarkable clarity.

This capability further enhances your ability to explore the cosmos in depth and detail.



  • 120° Apparent Field of View: Immerse yourself in an expansive 120-degree apparent field of view, offering an unmatched panoramic perspective during your astronomical observations. This wide field of view provides an extensive visual canvas, enabling you to capture celestial wonders in all their splendor.
  • 9mm Focal Length: The precisely calibrated 9mm focal length strikes an exquisite balance between magnification and field of view. This versatility makes it an excellent tool for various astronomical studies, from detailed lunar and planetary observations to exploring deep-sky objects. With this focal length, you can achieve high-resolution views while still enjoying a comfortable field of view.
  • 2" Barrel Size: Designed with a 2-inch barrel size, this eyepiece offers compatibility with a wide range of telescopes and mounts. This larger barrel size ensures a secure and stable connection, minimizing any potential wobbling during observations. It also allows for enhanced light gathering, providing brighter and more detailed views of celestial objects.

  • Argon-Purged Waterproof Design: Internally sealed and filled with dry argon gas, this eyepiece offers impeccable waterproof performance. This design ensures resistance against moisture and atmospheric conditions that could otherwise compromise your observations. It's a reliable companion for stargazing sessions in diverse environments.
  • Rigorous Water Testing: Subjected to thorough water testing, including submersion up to one meter for 30 minutes, this eyepiece is proven to maintain its waterproof integrity under various observing conditions. This rigorous testing guarantees its dependability and performance even in challenging and damp environments.
  • Fully Multi-Coated Optics: Experience exceptionally vivid and well-illuminated views, thanks to the state-of-the-art fully multi-coated optics. These advanced coatings enhance light transmission while minimizing glare, reflections, and internal scattering. The result is high-contrast images that reveal even the most subtle details of celestial objects.
  • Edge-Blackened Optics: Elevate image quality with precision-engineered optical elements featuring edge-blackening. This meticulous process minimizes internal reflections and stray light, resulting in impeccable contrast and sharpness. Whether you're observing bright planets or faint deep-sky objects, you'll enjoy stunningly clear and detailed views.
  • Precision-Machined Metal Construction: Crafted with precision-machined metal components, this eyepiece exudes durability and quality. The robust construction not only adds to its overall integrity but also ensures that the optical elements maintain precise alignment. This guarantees consistent performance over time, allowing you to enjoy years of exceptional observations.
  • Threaded Barrels for Filters: The inclusion of threaded barrels allows for the attachment of various astronomy filters, enhancing your observing experience. This feature provides customization options, enabling you to adapt to specific celestial targets and viewing conditions. It adds a layer of versatility to your exploration of the cosmos.
  • Comfortable Eye Relief: Designed with comfortable eye relief, this eyepiece caters to observers who wear eyeglasses. This feature ensures that you can enjoy extended viewing sessions without discomfort or the need to remove your glasses. The generous eye relief adds to the overall comfort and ease of use.
  • Wide Compatibility: The Explore Scientific 120° Series 9mm Waterproof Eyepiece is compatible with a wide range of telescope types and mounts. Whether you have a refractor, reflector, or catadioptric telescope, this eyepiece seamlessly integrates into your existing equipment, making it a valuable addition to any astronomer's toolkit. This compatibility ensures that you can explore the universe with ease and precision.
  • Included Accessories: The accessory ensemble accompanying the Explore Scientific 120° Series 9mm 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.


                                                                                  Astrophotographer Jack Newton talks about his Explore Scientific 120° Series 9mm Eyepiece Video:


                                                                                  What's Included:

                                                                                  ✓ Explore Scientific 120° Series 9mm Waterproof Eyepiece

                                                                                  ✓ Eyepiece Caps

                                                                                  ✓ Soft Silicone Rubber Eyecups

                                                                                  ✓ Eyepiece Pouch/Case

                                                                                  ✓ Limited 1 year warranty



                                                                                  Item Number  EPWP12009–01
                                                                                  Focal Length  9mm
                                                                                  Length  145mm
                                                                                  Width  60mm
                                                                                  Weight  21.2oz; 602g
                                                                                  Barrel Size  2.00"
                                                                                  Eye Relief  12.5mm
                                                                                  Field Stop Diameter  15.7mm

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