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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Explore Scientific 100° 14mm Waterproof Eyepiece - 2"
Explore Scientific 100° 14mm Waterproof Eyepiece - 2"
Explore Scientific 100° 14mm Waterproof Eyepiece - 2"

Explore Scientific 100° 14mm Waterproof Eyepiece - 2"

by Explore Scientific
SKU ES-EPWP10014-01
$349.99 - $349.99
$349.99
$349.99 - $349.99
$349.99
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  • 14mm Focal Length
  • 100° Apparent Field of View
  • 2" Barrel Diameter
  • Argon-Purged and Waterproof Construction
  • Fully Multi-Coated and Edge-Blackened Optics
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  • Description
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  • Explore Scientific 100° 14mm Waterproof Eyepiece - 2"

    The Explore Scientific 100° 14mm Waterproof Eyepiece delivers an immense 100° apparent field of view in a rugged, 2-inch barrel design for a true "spacewalk" experience. Its 14mm focal length provides high-power, wide-field views of planets and compact deep-sky objects, while its argon-purged body is certified waterproof after being submerged for 30 minutes at a depth of 1 meter.

    The 100° Apparent Field of View Experience

    With an apparent field of view of 100°, this eyepiece creates a panoramic window on the universe that can make you forget you're looking through a telescope. This vast expanse makes finding targets easier and keeps them in the field of view far longer in non-tracking telescopes like Dobsonians.

    The immersive view also relaxes your eye, allowing you to use averted vision more effectively to detect faint details in nebulae and galaxies. By looking slightly to the side of an object, you place its light on a more sensitive part of your retina, revealing structures that are invisible to direct sight.

    Argon-Purged and Waterproof to 1 Meter

    Designed for durability in any climate, each Explore Scientific 100° eyepiece is internally sealed and purged with inert argon gas. This process prevents internal fogging during damp nights and protects the delicate internal coatings from moisture, fungus, and degradation over the life of the eyepiece.

    This robust construction is tested to withstand being submerged in 1 meter of water for 30 minutes. Whether you observe in a humid coastal area or simply want the peace of mind that comes with environmentally-sealed optics, this eyepiece is built to last.

    Fully Multi-Coated for Maximum Contrast

    To ensure the panoramic view is as sharp and contrasty as it is wide, all optical surfaces are fully multi-coated, and lens edges are blackened. This treatment dramatically reduces internal reflections and light scatter, which would otherwise reduce image brightness and wash out faint details.

    The result is a dark, inky-black sky background that makes stars appear as sharp points and allows the subtle wisps of nebulae and distant galaxies to stand out. The high light throughput is critical for resolving fine detail on planetary surfaces and splitting tight double stars.

    ES 100° 14mm vs. Tele Vue Ethos 13mm: Field and Value

    The primary competitor for the Explore Scientific 14mm is the Tele Vue Ethos 13mm. While the Ethos is often considered the benchmark for edge-of-field correction in very fast (f/4) telescopes, the Explore Scientific 100° series presents a compelling alternative.

    • Competitor's Advantage: The Tele Vue Ethos line is renowned for its exceptional optical correction, delivering pinpoint stars across the entire field even in the most demanding fast reflectors.
    • This Eyepiece's Advantage: The Explore Scientific 14mm eyepiece provides the same immersive 100° field of view but adds the significant, practical benefit of being fully argon-purged and waterproof. For observers in challenging climates, this environmental sealing is a decisive feature.

  • How does the Explore Scientific 100° 14mm eyepiece perform on globular clusters like M13 in an f/10 SCT?

    In a typical 8" f/10 Schmidt-Cassegrain Telescope, the 14mm focal length yields approximately 145x magnification. This is an excellent power for resolving the dense cores of globular clusters like the Hercules Cluster (M13), and the 100° field will frame the cluster beautifully against a dark background, showing its full extent and surrounding star field.

    What is the main advantage of the Explore Scientific 100° 14mm being argon-purged and waterproof?

    The primary advantage is durability and longevity. Argon purging prevents internal fogging on humid nights and stops moisture from degrading the internal optical coatings over time. Being waterproof means you can observe in dewy conditions without worry and clean the eyepiece more thoroughly without risk of internal damage.

    Will I need a coma corrector with the Explore Scientific 100° 14mm eyepiece in a fast f/4 Dobsonian?

    Yes, it is highly recommended. While the eyepiece is well-corrected, any fast Newtonian reflector (f/5 or faster) exhibits significant coma, which distorts stars at the edge of the field into seagull shapes. A high-quality coma corrector, like a Tele Vue Paracorr Type 2, is essential to achieve sharp stars across the full 100° field of this eyepiece in an f/4 system.

    How does the 100° field of the Explore Scientific 14mm eyepiece help with non-driven telescopes?

    The extremely wide 100° apparent field of view results in a much larger true field of view at the telescope. This means that as the Earth rotates, a celestial object will take significantly longer to drift across the eyepiece compared to a standard 50° or 60° ocular. This reduces the need for constant nudging of the telescope, allowing for more relaxed, extended observation.

    Is the Explore Scientific 100° 14mm eyepiece suitable for observers who wear glasses?

    This is a trade-off. Hyper-wide eyepieces like the Explore Scientific 100° series often have limited eye relief to achieve their expansive fields. While the exact specification is not provided, observers with significant astigmatism who must wear glasses may not be able to see the full 100° field of view. Most users observe with their glasses off and refocus the telescope to compensate for nearsightedness or farsightedness.

    What's the difference between the Explore Scientific 100° 14mm and the 92° LER series?

    The main difference is a design choice between field of view and eye relief. The 100° series maximizes the apparent field of view for the most immersive experience possible. The 92° LER (Long Eye Relief) series trades a small amount of field width (92° vs 100°) for significantly more eye relief, making them a better choice for eyeglass wearers.

  • Focal Length 14mm
    Apparent Field of View 100°
    Barrel Size 2"
    Construction Argon-Purged, Waterproof
    Coatings Fully Multi-Coated, Edge-Blackened
    GTIN 812257014668

    • 14mm 100° Waterproof Eyepiece

      × 1

    • Dust Cap (Top)

      × 1

    • Dust Cap (Bottom)

      × 1

  • Explore Scientific Warranty