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Explore Scientific 52° Series 4.5mm Waterproof Eyepiece

SKU EPWP5245-01
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Original price $0.00 - Original price $0.00
Original price $0.00
$89.99 - $89.99
Current price $89.99
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Explore Scientific 52 Degree Series 4.5mm Waterproof Eyepiece - EPWP5245-01

Presenting the Explore Scientific 52° Series 4.5mm Waterproof Eyepiece, a high-powered optic that opens up a realm of possibilities in celestial observation.

While typically favored for planetary and double star observations, high-power eyepieces, ranging from 3mm to 10mm, also excel in revealing bright, compact deep-sky objects.

When employed, this eyepiece not only bring the object's scale into impressive focus, filling the field of view, but also create a striking contrast against a remarkably dark background sky.

This contrast effect intensifies with increased magnification, provided that atmospheric conditions permit a sharp image.

The 4.5mm focal length is a favored choice among astronomers for its ability to deliver some of the highest magnification views attainable with most telescopes.

The Explore Scientific 52° Series 4.5mm Waterproof Eyepiece - a blend of Comfort, Quality, and Value that represents the pinnacle of flat-field multi-element optics, poised to elevate your visual astronomy experiences.

With an expansive apparent field of view set at 52 degrees, these eyepieces offer an unparalleled combination of excellence and affordability when compared to similarly priced Plossls.

Moreover, these eyepieces excel in effortlessly enhancing contrast. Rather than fixating directly on an object, skilled observers can deftly shift their gaze slightly to either side.

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

By employing averted vision, you steer the image towards a more light-sensitive area of your eye, enabling you to discern even the faintest details with precision and clarity.



  • 52° Apparent Field of View: Immerse yourself in a sweeping celestial vista with an expansive 52-degree apparent field of view. This immersive perspective enhances the observation of celestial objects, providing a comprehensive and visually stimulating experience.
  • 4.5mm Focal Length: Striking a harmonious balance between versatility and precision, the 4.5mm focal length offers a high level of magnification suitable for detailed observations of planets, double stars, and compact deep-sky objects. It enables astronomers to explore intricate details with exceptional clarity and precision.
  • EMD (Enhanced Multi-Layer Deposition): Fortified with EMD coatings, embodying Enhanced Multi-Layer Deposition. This specialized coating process heightens light transmission and minimizes internal reflections, resulting in images that are crisper, with heightened contrast and enhanced color accuracy.
  • Waterproof - O-Ring Sealed Argon Gas Purged: Engineered to withstand the elements, this eyepiece features a robust waterproof design. It is fortified with O-ring seals, creating a secure, moisture-resistant barrier against water, dust, and debris. Moreover, it is infused with argon gas, further reinforcing its resistance to internal fogging and moisture-related damage.
  • Rigorous Water Testing: Subjected to meticulous evaluation for waterproof proficiency, this eyepiece endured a 30-minute submersion under one meter of water without any compromise in performance. This certification attests to its suitability for various weather conditions, including damp or rainy environments.
  • Removable Flip-Down Style Soft Silicone Rubber Eyecup: Equipped with a detachable flip-down style soft silicone rubber eyecup, this eyepiece ensures comfort and effectively shields against stray light, enhancing the overall viewing experience. Additionally, its removable design allows for customization based on the observer's preferences.
  • Edge Blackened: Showcasing edge-blackened optics, this eyepiece undergoes a process that darkens the edges of the lens to reduce internal reflections and intensify contrast. This refinement minimizes stray light, resulting in superior image quality, especially in scenarios with pronounced contrasts between bright and dark areas.
  • High-Quality Optics: Meticulously crafted with precision, this eyepiece hosts top-tier optics engineered to deliver exceptional views of celestial objects. The lenses adhere to stringent standards, with their optical surfaces meticulously polished to minimize aberrations and maximize light transmission.
  • Durable Construction: Engineered for resilience, this eyepiece embodies robust construction capable of withstanding the rigors of outdoor use. Its sturdiness ensures it can endure transportation, handling, and exposure to diverse environmental conditions, all without compromising its optical performance.
  • Threaded Barrels for Filters: Equipped with threaded barrels, this eyepiece empowers users to attach standard astronomical filters. This functionality allows for the customization of the viewing experience, enabling the enhancement of specific colors or the reduction of light pollution in accordance with the observer's preferences and target object.
  • Comfortable Eye Relief: Providing ample eye relief, this eyepiece facilitates extended periods of observation without inducing eye strain. This feature is particularly valuable for eyeglass wearers, ensuring they can maintain a full field of view without the need to remove their glasses.
  • Included Accessories: The accessory set accompanying the Explore Scientific 52° Series 4.5mm 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 52° Series Eyepieces Highlight Video:

                                                                              Explore Scientific Eyepiece Guide Video:


                                                                              What's Included:

                                                                              ✓ Explore Scientific 52° Series 4.5mm Waterproof Eyepiece

                                                                              ✓ Eyepiece Caps

                                                                              ✓ Soft Silicone Rubber Eyecups

                                                                              ✓ Eyepiece Pouch/Case

                                                                              ✓ Limited 1 year warranty



                                                                              Item Number  EPWP5245–01
                                                                              Focal Length  4.5mm
                                                                              Length  83.5mm
                                                                              Width  43mm
                                                                              Weight  181.4 grams; 6.4 oz.
                                                                              Barrel Size/Type  1.25" O.D. / Double Taper
                                                                              Eye Relief  15mm
                                                                              Field Stop Diameter  4.1mm
                                                                              Coatings  EMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces
                                                                              Lens Elements/ Groups  6 Elements in 3 Groups; Edge Blackened
                                                                              Filter Thread  Fits Standard 1.25-inch Dia. Thread in Filters (1.125-inches x 42 TPI)
                                                                              Waterproof  O-Ring Sealed Argon Gas Purged; Tested Under 1 Meter of Water for 30 Minutes
                                                                              Eyecup  Removable Flip-Down Style Soft Silicone Rubber
                                                                              Lens Caps  Slide-on Top and Bottom
                                                                              Materials  Optical Glass; Aluminum; Steel; Silicone Rubber
                                                                              Markings  Laser Engraved: Focal Length; Series; Serial Number; Brand

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