Explore Scientific 82° Series 2" 18mm Waterproof Eyepiece

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