Explore Scientific 68° Series 1.25" 16mm Waterproof Eyepiece

The 68° Series 16mm uses a multi-element design that combines low-dispersion and high-refractive-index glasses. At 68°, the field of view is meaningfully wider than standard Plössl or 52° eyepieces: you see more sky in every glance. Argon-purged waterproof construction and multilayer deposition coatings at $109.99 make this a serious mid-range performer.

Key Features

• 6-element optics in 4 groups — low-dispersion and high-refractive-index glasses work together for sharp, color-corrected images across the field
• 68° apparent field of view — a significant step up from 52° designs, providing wide, immersive views that make tracking objects easier
• Argon-purged waterproof housing — sealed against moisture, fog, and humidity for reliable all-weather performance
• Multilayer deposition coatings on all air-to-glass surfaces with edge-blackened elements for high contrast
• Fold-down silicone rubber eyecup for comfortable eye relief during extended sessions
• 1.25" barrel fits standard focusers on all common telescope types

Ideal For

• Deep-sky and planetary observers who want a medium-power eyepiece with a wide 68° field
• Observers upgrading from Plössl or 52° eyepieces — the jump to 68° is immediately noticeable
• All-around use at star parties, outreach, or personal sessions where a single versatile eyepiece needs to perform well on multiple targets