Skip to content

Explore Scientific 82° Series 4.5mm LER Waterproof Eyepiece

Original price $0.00 - Original price $0.00
Original price $0.00
$269.99 - $269.99
Current price $269.99
In stock

Ships To: United States & Canada 🇺🇸 🇨🇦

✓ Free U.S. Shipping (on most orders over $150 USD)

✓ Price Match Available

✓ Authorized Dealer

✓ Bulk Order Discounts Available

✓ Questions? Call Us 1-800-860-3429

Ships In: 1-3 Business Days

Estimated Delivery Time: 3-7 Business Days

Shipping & Returns

We offer Free Shipping across the United States (Lower 48 States) on most orders over $100 USD.

Shipping fees will apply on most orders shipping across Canada, with some exceptions.

We also offer a 30 Day Return Policy on most of the products that we carry. Some limitations may apply.

For full details on our Shipping & Returns Policy, please click here.


The vast majority of products that we sell, with a few exceptions, are covered under Warranty.

To view the Warranty details for each brand that we sell, including products that do not qualify for Warranty, please visit here.

Explore Scientific 82 Degree Series 4.5mm LER Waterproof Eyepiece - EPWP8245LE-01

The Explore Scientific 82° Series 4.5mm LER Waterproof Eyepiece prioritizes a comfortable viewing experience with its extensive 15.9mm eye relief, catering to observers, especially eyeglass wearers.

This generous eye relief ensures that users can fully enjoy the expansive field of view.

Its 4.5mm focal length is tailored for high-magnification observations, making it an excellent choice for scrutinizing the Moon, planets, and binary stars.

Under near-ideal atmospheric conditions, this eyepiece unveils astonishing planetary details, and its size is optimal for intricate examinations of deep sky object structures, including nebulae.

Crafted with edge-blackened optics made from low-dispersion glass boasting a high refractive index, this multi-element eyepiece achieves superior light transmission.

Each lens is fully multi-coated with durable Enhanced Multi-Layer Deposition (EMD) coatings, collectively elevating your telescope's potential to capture celestial wonders with exceptional sharpness, contrast, resolution, and definition.

Aligned with its counterparts in the Explore Scientific 82° Series, this eyepiece boasts an ultra-wide 82° apparent field of view that submerges observers in the cosmos, fostering a natural state of relaxation.

By unwinding and absorbing the presented scene, prolonged and detailed observations become significantly more manageable, with hidden details gradually emerging.

The broad field of view encourages the use of averted vision, a technique that involves directing your gaze slightly to the side of a target object, particularly valuable when observing faint celestial bodies.

Explore Scientific 82° Series Waterproof Eyepiece

This technique utilizes a part of your eye that is more sensitive to light, unveiling fainter images.

All Explore Scientific Waterproof Eyepieces undergo thorough gas-purging and are meticulously O-ring sealed, establishing a waterproof enclosure that is impervious to internal fogging and foreign contaminants.

This thoughtful design simplifies the cleaning process, ensuring your eyepiece remains in pristine condition for continued astronomical exploration.



  • 82° Apparent Field of View: The Explore Scientific 82° Series 4.5mm LER Waterproof Eyepiece offers an exceptionally wide field of view, providing observers with an immersive visual experience. This expansive perspective allows for comprehensive observation of celestial objects, capturing larger portions of the night sky in a single frame.
  • 4.5mm Focal Length: With its 4.5mm focal length, this eyepiece is tailored for high-magnification observations, making it ideal for detailed scrutiny of the Moon, planets, and binary stars. It excels at revealing intricate details and structures, particularly under favorable atmospheric conditions.
  • Long Eye Relief (LER) - 15.9mm: Boasting an impressive 15.9mm eye relief, this eyepiece ensures a comfortable viewing experience for all observers, including those who wear eyeglasses. The generous eye relief allows users to fully appreciate the field of view without straining their eyes.
  • Argon-Purged Waterproof Design: Designed with an argon-purged, waterproof construction, this eyepiece offers exceptional durability, suitable for various weather conditions. The argon gas filling prevents internal fogging and safeguards optical elements from contaminants, ensuring consistent performance over time.
  • Low-Dispersion Glass with High Refractive Index: Featuring optical elements crafted from low-dispersion glass with a high refractive index, this eyepiece enhances light transmission and minimizes chromatic aberration. This results in clear, high-contrast images with true color representation.
  • Enhanced Multi-Layer Deposition (EMD) Coatings: Each lens surface is fully multi-coated with durable EMD coatings. These coatings optimize light transmission, reduce reflections, and maximize contrast, delivering vivid and high-resolution images of celestial wonders.
  • Ultra-Wide Apparent Field Promotes Relaxation: Immersing observers in the cosmos, the eyepiece's ultra-wide 82° apparent field of view naturally promotes relaxation during extended observations.
  • Facilitates Averted Vision: Encouraging the use of averted vision, observers can direct their gaze slightly to the side of a target object. This technique is particularly valuable for observing faint objects, revealing previously unseen details.
  • Gas-Purged and O-Ring Sealed: Undergoing gas-purging and O-ring sealing, the eyepiece creates a waterproof environment impervious to internal fogging and contaminants. This design simplifies cleaning and maintenance of the eyepiece.
  • Included Accessories: The accessory ensemble accompanying the Explore Scientific 82° Series 4.5mm 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.


                                                              Explore Scientific Eyepiece Guide Video:


                                                              What's Included:

                                                              ✓ Explore Scientific 82° Series 4.5mm LER Waterproof Eyepiece

                                                              ✓ Eyepiece Caps

                                                              ✓ Soft Silicone Rubber Eyecups

                                                              ✓ Eyepiece Pouch/Case

                                                              ✓ Limited 1 year warranty



                                                              Item Number  EPWP8245LE-01
                                                              Focal Length  4.5mm
                                                              Length  106mm
                                                              Width  50mm
                                                              Weight  9.7oz; 275g
                                                              Barrel Size  1.25"
                                                              Eye Relief  15.9mm

                                                              Customer Reviews

                                                              Based on 2 reviews
                                                              Great customer service and a great lens

                                                              A bit of a missed communication at first, but they resolved it and made things awesome. I will be buying from them again for future needs. Lens works great, just be sure you have the right viewing conditions as it's powerful.

                                                              Kristopher J.

                                                              Good views, solid made eye piece. Would buy again.