Explore Scientific 92° 2-Inch Waterproof Eyepiece Series — Ultra-Wide Views of Deep-Sky Objects

The Explore Scientific 92° series 2-inch waterproof telescope eyepieces deliver breathtaking, ultra-wide views of the night sky. A telescope eyepiece is the lens you look through, and its apparent field of view determines how much sky you take in — at a huge 92°, these eyepieces give an immersive, almost spacewalk-like window on deep-sky objects.

Sealed and waterproof (argon-purged) to resist internal fogging and moisture, the 92° series is built for serious observers who want expansive fields and rugged, weather-resistant construction. This listing covers the 12mm and 17mm focal lengths.

Who it's for

For deep-sky observers who want ultra-wide, immersive views and durable, sealed eyepieces for their 2-inch focusers. New to eyepieces? See our astronomy 101 stargazing basics guide.

Key features

• Enormous 92° apparent field of view for immersive, wide-sky observing.
• Waterproof, argon-purged sealing that resists internal fogging and moisture.
• 2-inch barrel format for large-field, low-power deep-sky viewing.
• Available in 12mm and 17mm focal lengths for different magnifications.
• Premium multi-coated optics for bright, high-contrast views.

Frequently asked questions

What does a 92° field give me?
A very wide apparent field creates an immersive view with lots of sky visible at once — great for star fields, clusters, and large nebulae.

Which focal length should I choose?
The 17mm gives lower power and a wider true field; the 12mm gives higher magnification. Many observers own both for different targets.

Do they fit my telescope?
They use a 2-inch barrel, so you'll need a 2-inch focuser or diagonal.