68° Series Waterproof Telescope Eyepieces

Explore Scientific's 68° Series eyepieces offer a wide 68-degree apparent field of view in a waterproof, argon-purged design, striking an excellent balance between immersive wide-field viewing, comfortable eye relief and sharp, high-contrast images. They are favorites among visual astronomers for sweeping star fields, framing open clusters and observing brighter nebulae and galaxies.

Fully multi-coated optics and low-dispersion glass help deliver crisp, color-accurate views, while sealed construction protects the optics from dew, moisture and dust. The 68° Series spans a wide range of focal lengths in both 1.25-inch and 2-inch sizes, including the popular 24mm, so you can build a well-matched eyepiece set for low-power sweeping and medium-power detail. Whether you use a refractor, a Newtonian reflector or a Dobsonian telescope, 68° Series eyepieces bring a noticeably wider and more engaging view of the night sky to every observing session.

When choosing among the 68° Series, think about the magnifications you use most. Longer focal lengths such as 34mm and 40mm provide the widest true field on telescopes with 2-inch focusers, while 16mm to 24mm eyepieces cover medium power and shorter focal lengths provide detailed lunar and planetary views. Their consistent design and moderate weight make them easy to balance on most mounts. For observers who want a wider, more engaging view than standard eyepieces without the bulk of ultra-wide designs, the 68° Series is one of the most versatile eyepiece lines available.