
Explore Scientific 10mm 52° Series Waterproof Eyepiece
Manufacturer Part # EPWP5210-01
Manufacturer Part # EPWP5210-01
For astronomers who value precision, contrast, and durability in a compact form, the Explore Scientific 10mm 52° Series Eyepiece is an excellent choice. Designed for mid- to high-power observations, this eyepiece delivers sharp, high-contrast views with excellent light transmission, making it ideal for planetary, lunar, and deep-sky observing.
With a 52-degree apparent field of view, this eyepiece provides a well-framed and immersive view while maintaining excellent edge sharpness. While not classified as a wide-field eyepiece, the 52-degree design balances a natural viewing experience with enhanced contrast, making it ideal for studying fine details on the Moon, resolving planetary features, and examining deep-sky objects with precision.
The 10mm focal length makes this eyepiece particularly useful for mid- to high-magnification observations. Whether you’re tracking the cloud bands of Jupiter, resolving Saturn’s Cassini Division, or splitting double stars, this eyepiece offers outstanding performance with pinpoint stars across the field.
Every air-to-glass surface is treated with Enhanced Multi-Layer Deposition (EMD) coatings to minimize reflections and maximize light transmission. The result is a bright, high-contrast image with minimal ghosting or glare, allowing for optimal viewing of fainter deep-sky objects as well as crisp planetary details.
Unlike many eyepieces that use nitrogen purging, Explore Scientific employs argon gas, which has larger molecules that resist leakage over time. The eyepiece is fully waterproof, preventing internal fogging and protecting against dust and moisture, ensuring long-term optical stability and performance. This also makes it highly resistant to temperature fluctuations—perfect for those who observe in humid or cold environments.
With 15mm of eye relief, this eyepiece is comfortable to use for extended observing sessions, even for those who wear glasses. The fold-down rubber eyecup provides additional comfort and helps block stray light for a more immersive experience.
The black anodized aluminum barrel is built for durability, while the rubber grip ring offers a secure hold, even in colder temperatures when gloves are necessary. The 1.25-inch barrel ensures compatibility with a wide range of telescopes, diagonals, and Barlow lenses.
The Explore Scientific 10mm 52° Series Eyepiece is an outstanding choice for those looking to enhance their planetary and deep-sky observations with high-quality optics in a durable, weatherproof design. Whether you’re upgrading from stock eyepieces or expanding your collection, this 10mm eyepiece delivers excellent clarity and performance at an affordable price point.
For those seeking a sharp, contrast-rich, and durable eyepiece, the Explore Scientific 10mm 52° Series is a solid investment that delivers exceptional performance for planetary and deep-sky observations.
Item Number | EPWP5210–01 |
Focal Length | 10mm |
Length | 83mm |
Width | 43mm |
Weight | 181.4 grams; 6.4 oz. |
Barrel Size/Type | 1.25" O.D. / Double Taper |
Eye Relief | 16.6mm |
Field Stop Diameter: | 9.1mm |
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 |
Barrel Size | 1.25" |
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Eye Relief | 16.6mm |
Field of view | 52° |
Field Stop | 9.1mm |
Focal Length | 10mm |
Number of optical elements | 6 |
Weight | 6.4 oz |
Warranty | 1 year |
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