Explore Scientific 52° Series 2" 40mm Waterproof Eyepiece

Explore Scientific 52° Series 2" 40mm Waterproof EyepieceThe 52 Series 40mm is the widest field eyepiece in the lineup, using a 2" barrel to frame expansive views of star fields and large deep sky objects at the lowest practical magnification. Argon purged waterproof construction and EMD coatings deliver reliable optical quality at a price that undercuts most 2" eyepieces on the market. Key Features 2" barrel for maximum field of view delivers noticeably wider views than any 1. 25" eyepiece Argon purged

The 52° Series 40mm is the widest-field eyepiece in the lineup, using a 2" barrel to frame expansive views of star fields and large deep-sky objects at the lowest practical magnification. Argon-purged waterproof construction and EMD coatings deliver reliable optical quality at a price that undercuts most 2" eyepieces on the market.

Key Features

• 2" barrel for maximum field of view — delivers noticeably wider views than any 1.25" eyepiece
• Argon-purged waterproof housing — sealed against moisture and fog for dependable all-weather observing
• Enhanced Multi-Layer Deposition (EMD) coatings on all air-to-glass surfaces for bright, high-contrast images at low magnification
• 4-element, 2-group optical design with edge-blackened elements to suppress stray light across the wide field
• Fold-down silicone rubber eyecup with comfortable eye relief for relaxed extended viewing, including with eyeglasses

Ideal For

• Wide-field deep-sky observers framing large targets like the Pleiades, Orion Nebula complex, or Andromeda Galaxy at their most expansive
• Telescope owners with 2" focusers who want to take full advantage of their equipment's field-of-view capability
• Star party and outreach use — low magnification and wide fields make it easy for visitors to find and enjoy bright objects