Explore Scientific 100° Series 2" 5.5mm Waterproof Eyepiece

The 100° Series 5.5mm delivers high-magnification views across a full 100° apparent field, which creates the sensation of floating directly through the star field. At high magnification, planets and tight deep-sky objects sit within a vast, sharp field. It has argon-purged waterproof construction and premium multi-element optics.

Key Features

• 100° apparent field of view — a hyper-wide field that creates a genuinely immersive "spacewalk" experience
• Premium multi-element optics for sharp, well-corrected images across the enormous 100° field
• 2" barrel
• Argon-purged waterproof housing — sealed against moisture, fog, and temperature extremes for all-weather reliability
• Multi-layer coatings on all air-to-glass surfaces with edge-blackened elements for contrast
• Fold-down silicone rubber eyecup for comfortable eye positioning

Ideal For

• Planetary observers seeking maximum immersion — Jupiter and Saturn sit within an expansive field that makes tracking effortless and the observing experience transformative
• Double-star and compact deep-sky observers who want the context of the surrounding field while examining fine detail
• Observers who have experienced 82° and want to go further — the jump to 100° is the next step in the wide-field progression