Explore Scientific 68° Series 2" 28mm Waterproof Eyepiece

The 68° Series 28mm steps up to a 2" barrel and 6-element optics for genuinely wide, bright deep-sky views. The combination of 68° field width, premium multi-element optics, and generous eye relief makes this a natural choice for extended deep-sky sessions. Argon-purged waterproof construction keeps it performing through the worst dew and humidity.

Key Features

• 2" barrel accommodates a 31.8mm field stop for true wide-field performance
• 6-element optics — precision glass types deliver sharp, color-corrected images across the wide field
• 68° apparent field of view — frames large deep-sky objects with room to spare in an immersive, natural-feeling view
• Argon-purged waterproof housing — sealed and fog-proof for reliable all-weather observing
• Multilayer deposition coatings on all air-to-glass surfaces with edge-blackened elements for high contrast
• Fold-down silicone rubber eyecup with generous eye relief for comfortable viewing with or without eyeglasses

Ideal For

• Deep-sky observers with 2" focusers who want wide, sharp views of nebulae, star clusters, and galaxy groups at moderate-low magnification
• Extended observing sessions — generous eye relief and the immersive 68° field make hours at the eyepiece comfortable
• Upgrading from basic 2" eyepieces