1.25" 8.5mm 82° Waterproof Eyepiece
$269.99
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1.25" 8.5mm 82° Waterproof Eyepiece
$269.99
82° Ultra-Wide
Immersive deep sky viewing experience
Argon Purged
Complete waterproof fogproof optical sealing
Long Eye Relief
Comfortable observing for eyeglass wearers
8.5mm Focal Length
High magnification planetary observational power
EMD Coatings
Enhanced multi-layer high light transmission
1.25 Barrel
Fits standard telescope focuser drawtubes
In Stock
Celestial Clarity UnleashedExperience breathtaking ultra-wide astronomical observation
The Explore Scientific 8.5mm 82° Series Waterproof Eyepiece offers an immersive observing experience with its expansive 82-degree apparent field of view and comfortable long eye relief. Designed for high magnification, this premier telescope eyepiece reveals crisp contrast on lunar craters, planetary atmospheres, and deep-sky nebulae. Featuring argon-purged waterproof optics, it prevents internal fogging and maintains pristine optical performance in all environment conditions.
Deep Space ImmersionAdvanced optics engineered for ultimate stargazing clarity
Elevate your astronomy experience with the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece. Crafted with edge-blackened optics made of low-dispersion glass with a high refractive index, this multi-element astronomical eyepiece delivers high-contrast views with incredible color fidelity. Every optical surface is treated with durable Enhanced Multi-Layer Deposition (EMD) coatings to maximize light transmission and suppress reflections. The broad 82-degree ultra-wide field of view allows your eyes to relax and naturally utilize averted vision, uncovering faint details in nebulae and star clusters that standard eyepieces miss. Furthermore, the O-ring sealed, argon-purged housing protects internal lens elements from dust, fungus, and internal condensation, ensuring decades of reliable performance under the night sky.
Technical Performance MetricsDetailed measurements and optical construction specs
Item Number
EPWP8285LE-01 (hash)
Focal Length
8.5mm
Apparent Field of View
82°
Eye Relief
16.3mm
Barrel Size
1.25"
Length
106mm
Width
50mm
Weight
9.9oz / 280g
Waterproofing
Argon-Purged & O-Ring Sealed
Coatings
Fully Multi-Coated EMD Coatings
Precision Eyepiece FeaturesBuilt for high performance astronomical stargazing
Apparent Field of View82° ultra-wide field creates an immersive viewing experience
Focal Length8.5mm optimized for detailed lunar and planetary views
Optical CoatingsEnhanced Multi-Layer Deposition (EMD) for maximum contrast (sparkles)
Waterproof DesignGas-purged and O-ring sealed to prevent internal fogging
Long Eye Relief16.3mm eye relief accommodates observers wearing eyeglasses
Advanced Glass OpticsLow-dispersion glass with edge-blackened lens elements
ProtectionPurged housing protects internal elements from dust and fungus
Frequently Asked QuestionsEverything you need to know
What magnification does the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece provide?
The magnification produced by the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece depends on your telescope's focal length. You can calculate the magnification by dividing your telescope's focal length in millimeters by 8.5mm.
Is the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece good for eyeglass wearers?
Yes, the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece features a comfortable 16.3mm eye relief, allowing astronomers who wear eyeglasses to observe the full field of view easily.
What are the benefits of argon purging in the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece?
Argon purging creates a waterproof internal environment that prevents internal fogging, protects against dust and moisture, and keeps fungal growth from damaging the lens elements of the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece.
What barrel size does the Explore Scientific 8.5mm 82° Series Waterproof Eyepiece use?
The Explore Scientific 8.5mm 82° Series Waterproof Eyepiece comes with a standard 1.25-inch barrel size, making it compatible with most standard telescope focusers and star diagonals.