Explore Scientific 6.5mm 82° 1.25" LER Eyepiece – A Premium Wide-Field Experience with Superior Comfort
When it comes to high-performance eyepieces, Explore Scientific’s 6.5mm 82° Long Eye Relief (LER) Eyepiece delivers an exceptional balance of expansive views, pinpoint sharpness, and unmatched comfort. Whether you’re observing the intricate details of Jupiter’s cloud bands, navigating the rugged lunar surface, or hunting for deep-sky objects, this eyepiece provides the optical quality and immersive field of view needed to elevate your astronomy experience.
With a combination of premium glass, fully multi-coated optics, a long eye relief design, and waterproof construction, this eyepiece is built to perform in a wide range of observing conditions. It’s an ideal choice for anyone who values clarity, contrast, and a comfortable viewing experience, especially those who wear glasses or prefer an eyepiece that reduces eye strain during extended observing sessions.
An Ultra-Wide 82° Apparent Field for Unparalleled Immersion
One of the most remarkable features of the Explore Scientific 6.5mm 82° eyepiece is its incredibly expansive 82-degree apparent field of view. This ultra-wide perspective creates a breathtaking, almost spacewalk-like experience, pulling you deep into the celestial scenery.
A larger field of view isn't just about aesthetics—it also serves an important practical purpose. With traditional eyepieces, objects quickly drift out of view, especially when using a telescope without tracking capabilities. The 82° field allows you to observe for longer before needing to adjust your scope, making it particularly valuable for Dobsonian users or anyone using a manual mount.
The benefits of this wide field are especially noticeable when observing deep-sky objects, such as star clusters, nebulae, and galaxies. With a greater portion of the sky visible in a single frame, it's easier to take in the structure of large targets like the Andromeda Galaxy (M31) or the sprawling Veil Nebula. Even at higher magnifications, tracking planets and lunar features becomes more effortless, giving you more time to admire fine details without frequent repositioning.
Exceptional Optical Quality and Contrast for Stunning Detail
Optical performance is at the heart of any great eyepiece, and Explore Scientific delivers with a design optimized for clarity, contrast, and minimal optical aberrations.
The fully multi-coated lenses ensure that as much light as possible reaches your eye, minimizing reflections and maximizing brightness. This is particularly important for planetary and deep-sky observations, where even the slightest loss of contrast can mean the difference between resolving fine details or missing them entirely.
To further enhance performance, the internal surfaces of the eyepiece barrel are blackened and carefully baffled to prevent stray light from bouncing around inside, which can degrade contrast and introduce unwanted glare. This results in a crisp, high-contrast view that makes celestial details pop.
In addition, the high-index glass elements used in this eyepiece are selected for their ability to reduce chromatic aberration and provide a flat field of view with sharp stars from center to edge. Many budget eyepieces suffer from edge distortions or color fringing, but Explore Scientific’s advanced optical engineering helps eliminate these common issues, ensuring that stars remain pinpoint-sharp across the entire field.
Long Eye Relief for Maximum Comfort – Perfect for Eyeglass Wearers
One of the standout features of this eyepiece is its long eye relief (LER) design, which provides 15mm of eye relief. This means your eye doesn’t need to be pressed right up against the eyepiece to take in the full field of view.
Long eye relief is particularly beneficial for eyeglass wearers, as it allows them to comfortably observe without having to remove their glasses. Many eyepieces with ultra-wide fields suffer from short eye relief, making it difficult for glasses-wearers to enjoy the entire field, but this model is specifically designed to accommodate both spectacle users and those who prefer a more relaxed viewing position.
For added comfort, the eyepiece is equipped with a soft rubber eyecup that can be folded down if you prefer to get closer to the lens or if you’re wearing glasses. The comfortable viewing position makes this an excellent choice for extended observation sessions, reducing eye fatigue while still delivering stunning visual detail.
Waterproof and Argon-Purged – Built for Durability and Longevity
Astronomical eyepieces are investments that should last a lifetime, and Explore Scientific ensures long-term performance and durability by making this eyepiece completely waterproof and argon-purged.
The waterproof design means that internal elements are fully sealed, preventing moisture, dust, and debris from entering the eyepiece. This is particularly useful for astronomers who observe in humid environments, where traditional eyepieces can suffer from internal fogging and condensation buildup.
In addition, the argon-purging process helps maintain a dry and stable internal environment, reducing the likelihood of lens fogging during temperature changes. Unlike standard nitrogen purging, argon molecules are larger and less likely to escape over time, ensuring that the eyepiece maintains its sealed integrity for years to come.
Precision Engineering for Secure and Comfortable Handling
The 1.25-inch barrel of the Explore Scientific 6.5mm 82° eyepiece is precision-machined to ensure a secure and snug fit in any standard 1.25” focuser or diagonal. The internally blackened barrel reduces stray light reflections, preserving contrast, while the textured grip ring provides excellent handling, even when adjusting focus in colder conditions or while wearing gloves.
Whether you're setting up for a night of planetary observation or chasing faint deep-sky targets, the ergonomic design ensures that handling and adjustments are effortless.
Ideal Uses and Telescope Compatibility
With its 6.5mm focal length, this eyepiece is best suited for medium to high-power magnification, making it a great choice for a variety of observational targets and telescope setups.
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Planetary and lunar observations – Crisp views of Saturn’s rings, the Great Red Spot on Jupiter, and the rugged terrain of the Moon.
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Deep-sky exploration – Splitting tight double stars, and observing globular clusters.
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Dobsonian and manual telescope users – The ultra-wide field provides extended tracking time before objects drift out of view.
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Refractors, SCTs, and Maksutov-Cassegrains – Works beautifully with a range of optical designs, offering superb image clarity.
Elevate Your Observing Experience
The Explore Scientific 6.5mm 82° 1.25" LER Eyepiece is designed for astronomers who demand sharp, immersive views without sacrificing comfort. Whether you're a seasoned observer looking to enhance your planetary and deep-sky sessions or a beginner upgrading to a premium wide-field eyepiece, this model delivers performance that stands out from the competition.
With its combination of premium optics, wide apparent field, long eye relief, and rugged waterproof construction, this eyepiece is built to provide exceptional views for years to come.
