Explore Scientific 120° Series 2" 9mm Waterproof Eyepiece

The 120° Series 9mm has Explore Scientific's widest apparent field of view, 120°. Explore Scientific calls it "in a class by itself." At 9mm, it delivers moderate-high magnification while surrounding you with an immersive view.

The optical design behind a 120° field is extraordinarily demanding: maintaining sharp, well-corrected images across such an extreme field width takes 12 elements in 8 groups. The result, in Explore Scientific's words, is a field "unlike anything you have experienced before": planets and deep-sky objects appear within a vast, continuous star field that extends to the very edge of your peripheral vision.

Argon-purged waterproof construction protects this premium optical investment from moisture, fog, and temperature swings.

Key Features

• 120° apparent field of view — Explore Scientific's widest apparent field, creating an immersive view
• 12 elements in 8 groups, fully multi-coated for exceptional contrast and minimal glare
• 2" barrel
• Argon-purged waterproof housing — sealed against moisture, fog, and temperature extremes, protecting a significant investment
• Multi-layer coatings on all air-to-glass surfaces with edge-blackened elements
• Fold-down silicone rubber eyecup for comfortable eye positioning

Ideal For

• Observers seeking the ultimate immersive experience — the 120° field creates a visceral sense of being surrounded by the star field rather than looking through a window
• Experienced visual astronomers who have worked through narrower fields and want to experience a 120° field
• Deep-sky enthusiasts who want a galaxy, nebula or star cluster close up with the surrounding star field in view
• Collectors and serious observers who want Explore Scientific's widest-field eyepiece