Explore Scientific 52° Series 1.25" 30mm Waterproof Eyepiece

The 52° Series 30mm reaches the maximum practical focal length for a 1.25" barrel, delivering wide, bright views of extended deep-sky objects before stepping up to 2" eyepieces. At $69 with argon-purged waterproof construction and EMD coatings, it maximizes your 1.25" focuser's potential.

Key Features

• Argon-purged waterproof housing — sealed against moisture, fog, and temperature changes for all-season reliability
• Enhanced Multi-Layer Deposition (EMD) coatings on all air-to-glass surfaces for maximum brightness at low magnification
• 4-element, 2-group optical design with edge-blackened elements to control internal reflections
• Fold-down silicone rubber eyecup with comfortable eye relief for relaxed viewing, including with eyeglasses
• 1.25" barrel — delivers wide fields without requiring a 2" focuser

Ideal For

• Deep-sky observers who want the widest possible view through a 1.25" focuser for large nebulae, open clusters, and rich star fields
• Telescope owners without 2" focusers who still want low-power, wide-field capability
• Complementing a high-power eyepiece — pair it with a short-focal-length eyepiece from the same series for a complete two-eyepiece kit