2" 18mm 82 Degree Waterproof Eyepiece
$319.99
Skip to product information
2" 18mm 82 Degree Waterproof Eyepiece
$319.99
18mm Focal Length
High magnification telescope eyepiece performance
82° Ultra-Wide FOV
Immersive wide field space views
Argon Purged Waterproof
Complete fogproof internal optical protection
2.00-Inch Barrel Size
Fits standard two inch focusers
13mm Eye Relief
Comfortable viewing during long sessions
Sealed O-Ring Design
Easy cleaning under running water
Immersive Night Sky ExplorationExperience Unrivaled Optical Clarity and Comfort
The Explore Scientific 18mm 82° Series Waterproof Eyepiece is engineered to deliver crisp high-magnification views for planetary, lunar, and double-star astronomical observations. Featuring advanced argon-purged waterproofing and superior optical glass, this telescope eyepiece transforms visual stargazing into an immersive, comfortable experience.
Superior Astronomy OpticsAdvanced Argon Purged Telescope Eyepiece Engineering
Elevate your stargazing capabilities with the premium Explore Scientific 18mm 82° Series Waterproof Eyepiece. Featuring an expansive 82-degree apparent field of view, this ultra-wide telescope eyepiece allows your eyes to relax naturally, helping subtle planetary textures and deep sky nebula structures materialize during extended viewing sessions. The ultra-wide field of view also optimizes the use of averted vision, allowing observers to detect faint celestial targets that standard eyepieces fail to reveal. Sealed with high-grade O-rings and gas-purged with inert argon, the optical stack is fully protected against internal fogging, dust, and moisture intrusion. This robust waterproof design simplifies maintenance, permitting safe, thorough cleaning with specialized lens solutions or under running water without damaging internal lens coatings.
Technical SpecificationsDetailed Optical Dimensions and Parameters
Item Number
EPWP8218–01 (hash)
Focal Length
18mm
Apparent Field of View
82°
Eye Relief
13mm
Barrel Size
2.00"
Field Stop Diameter
25.3mm
Length
89mm
Width
56mm
Weight
13.7oz / 390g
Waterproofing
Argon Purged & O-Ring Sealed
Key Optical InnovationsDesigned for Extreme Durability and Performance
Apparent Field of ViewUltra-wide 82-degree field for panoramic sky views
Waterproof ConstructionArgon purged and O-ring sealed against moisture
Averted Vision SupportWide perspective aids detection of faint objects
Easy Cleaning DesignSubmersible design allows safe surface rinsing
High Magnification PerformanceExcellent clarity for planetary and double star details
Standard FittingCompatible with standard 2.00-inch focusers and diagonals
Frequently Asked QuestionsEverything you need to know
What makes the Explore Scientific 18mm 82° Series Waterproof Eyepiece ideal for deep-sky observation?
The Explore Scientific 18mm 82° Series Waterproof Eyepiece features an ultra-wide 82° apparent field of view that naturally relaxes your eyes and facilitates averted vision, making faint nebulae and distant star clusters much easier to detail.
Is the Explore Scientific 18mm 82° Series Waterproof Eyepiece safe to clean with water?
Yes, because the Explore Scientific 18mm 82° Series Waterproof Eyepiece is argon-purged and O-ring sealed, it can be safely rinsed under running water with cleaning fluid without moisture intruding into the internal elements.
What telescope barrel size does the Explore Scientific 18mm 82° Series Waterproof Eyepiece fit?
The Explore Scientific 18mm 82° Series Waterproof Eyepiece utilizes a standard 2.00-inch barrel size, making it compatible with standard 2-inch telescope focusers and diagonals.
How does argon purging benefit the Explore Scientific 18mm 82° Series Waterproof Eyepiece?
Argon purging replaces internal atmospheric air with inert argon gas, completely preventing internal lens fogging, fungal growth, and condensation when transitioning between different outdoor temperatures.