Explore Scientific 82° Series 2" 18mm Waterproof Eyepiece

Explore Scientific 82° Series 2" 18mm Waterproof EyepieceThe 82 Series 18mm is the entry point to the 2" barrel 82 eyepieces, delivering genuinely wide, bright views of deep sky objects with the sharp lanthanum glass optics the series is known for. The step from 1. 25" to 2" opens up noticeably wider true fields of view. At $169 with waterproof construction, it offers 2" ultra wide field performance that significantly undercuts the competition. Key Features 2" barrel for maximum light throughput and the

The 82° Series 18mm is the entry point to the 2" barrel 82° eyepieces, delivering genuinely wide, bright views of deep-sky objects with the sharp lanthanum glass optics the series is known for. The step from 1.25" to 2" opens up noticeably wider true fields of view. At $169 with waterproof construction, it offers 2" ultra-wide-field performance that significantly undercuts the competition.

Key Features

• 2" barrel for maximum light throughput and the widest possible true field of view
• 82° apparent field of view — immersive, ultra-wide framing for deep-sky objects and rich star fields
• 6-element lanthanum glass optics — sharp, well-corrected images across the full wide field
• Argon-purged waterproof housing — sealed against moisture, fog, and humidity for all-weather reliability
• Enhanced Multi-Layer Deposition (EMD) coatings on all air-to-glass surfaces with edge-blackened elements
• Fold-down silicone rubber eyecup for comfortable extended viewing

Ideal For

• Deep-sky observers stepping into 2" wide-field eyepieces — the 18mm provides an excellent introduction to ultra-wide 2" performance
• Nebula and cluster observers who want generous magnification combined with the wide, bright views that only a 2" barrel can deliver
• 2" focuser owners looking for wide-field lanthanum glass optics at a price that makes the 82° series' reputation accessible