Explore Scientific 52° Series 1.25" 25mm Waterproof Eyepiece

Clearer, More Immersive Stargazing

Looking for crystal-clear views of the cosmos? The Explore Scientific 25mm Eyepiece delivers stunning clarity without the discomfort of cheaper lenses, and it works flawlessly in all weather conditions.

Features

• 25mm Focal Length: Delivers the ideal balance between wide-field views and magnification for versatile celestial observation.
• 52° Apparent Field of View: Offers an expansive window to the night sky, perfect for observing everything from the moon’s craters to distant galaxies.
• Fully EMD Multi-Coated Optics: Ensures exceptional light transmission, sharp contrast, and bright, crystal-clear images, outperforming standard eyepieces.
• Waterproof and Fog-Proof Design: Argon-filled and sealed, this eyepiece resists moisture and fogging, allowing for clear views in any weather condition.
• Slip-Resistant Textured Surface: Provides a secure grip during handling, even when wearing gloves or observing in damp conditions.
• Fold-Down Eyecup: Customizable comfort for glasses wearers and non-glasses wearers alike, reducing eye strain during long viewing sessions.
• Lightweight and Compact: Weighs just 6.4 oz, making it easy to carry and balance on a variety of telescope setups.
• Perfect for Binoviewers: Optimized for stereo viewing, offering unparalleled brightness and clarity without sacrificing image quality.

The Explore Scientific 25mm Eyepiece is for you if...

• You’re an intermediate to advanced amateur astronomer seeking crystal-clear, immersive views of the cosmos.
• You want to explore both planetary details and deep-space objects without switching between multiple eyepieces.
• You’ve experienced eye strain or discomfort with lower-quality eyepieces and need one that delivers comfort for long observation sessions.
• You often stargaze in humid, foggy, or unpredictable weather conditions and need a durable, weather-resistant eyepiece.
• You use or are considering using binoviewers and need an eyepiece that delivers bright, balanced stereo views.
• You value precision and quality and are ready to invest in an eyepiece that enhances your entire stargazing experience.

Imagine scanning the lunar surface and seeing every crater, ridge, and shadow with stunning clarity, or observing distant nebulae and galaxies with pinpoint detail. The Explore Scientific 52° Series 1.25" 25mm Waterproof Eyepiece is designed to provide that exact experience, thanks to its versatile 25mm focal length. With an expansive 52° apparent field of view, you’ll be able to enjoy wide-field panoramas of the night sky, perfect for observing large celestial objects like the Andromeda Galaxy or the Orion Nebula, without losing the finer details.

Optical performance is everything when it comes to astronomy. That’s why this eyepiece features fully EMD multi-coated optics, ensuring maximum light transmission, sharp contrast, and minimal chromatic aberration. You’ll notice a significant difference in how much light is gathered, allowing you to detect faint objects like star clusters and distant galaxies that cheaper eyepieces simply can't reveal. Plus, with an 18.2mm field stop diameter, you’ll enjoy edge-to-edge clarity, meaning no more distortion at the edges of your view—just a crisp, clear image of the night sky.

This eyepiece is built to perform in any condition, so you never have to cut your stargazing short. It’s argon-purged, waterproof, and fog-proof, ensuring durability in humid, cold, or damp environments. Whether you're observing from a mountaintop or in a dewy field, you won’t have to worry about moisture or fogging affecting your view. This level of weather resistance makes it an essential tool for dedicated astronomers who don't let conditions limit their exploration of the cosmos.

Comfort during extended observation sessions is crucial, especially for those long nights under the stars. With 16.4mm of eye relief and a fold-down eyecup, this eyepiece is perfect for both glasses wearers and those who prefer to view without them. The foldable eyecup ensures a snug fit and blocks stray light, so you can focus solely on your celestial target without distraction. And thanks to its slip-resistant textured surface, you can confidently handle the eyepiece, even when wearing gloves or working in less-than-ideal conditions.

If you're using a binoviewer setup, this eyepiece is the perfect complement. It provides bright, balanced stereo views, making your stargazing sessions even more immersive. The lightweight design (weighing only 6.4 oz) ensures that it won't unbalance your telescope, and the compact 1.25" diameter barrel fits a wide range of telescope models, making it a versatile choice for astronomers with diverse setups.

Investing in the Explore Scientific 52° Series 25mm Eyepiece means investing in years of exceptional astronomy experiences. It’s not just an upgrade—it’s a tool that will transform how you explore the universe. From deep-space wonders to detailed planetary views, you’ll gain sharper, clearer, and more comfortable observations, no matter where or when you stargaze.