Explore Scientific 68° Series 34mm Waterproof Eyepiece

The Explore Scientific 68° Series 34mm Waterproof Eyepiece is an argon-purged wide-field eyepiece built for observers who want a comfortable, full-immersion view without worrying about internal fogging or contamination over the eyepiece's lifetime. Its 68-degree apparent field of view and long eye relief make extended observing sessions easier on the eyes, and the parfocal design means it stays close to focus when swapped with other eyepieces in the same series. Every unit is tested submerged in one meter of water for 30 minutes to confirm the seal holds.

• 68° Apparent Field of View: Long eye relief creates a comfortable, immersive view for extended observing sessions.
• Argon-Purged Waterproof Seal: Argon's larger atomic size and greater inertness than nitrogen better prevent seal leakage and internal fogging over time.
• Parfocal Design: Stays near focus when switching between eyepieces in the same series.
• Removable Silicone Eyecup: Foldable, soft rubber eyecup adds observer comfort during long sessions.
• 2" Barrel, 26.4mm Eye Relief: 685g eyepiece tested submerged in 1 meter of water for 30 minutes to confirm its seal.
• Transferable Warranty: 1-year limited warranty upgrades to Explore Scientific's transferable STAR warranty upon registration.