Explore Scientific 52° Series 1.25" 15mm Waterproof Eyepiece

The 52° Series 15mm delivers comfortable medium-power views ideal for both deep-sky detail and casual planetary observation. With argon-purged waterproof construction and EMD-coated optics, it offers durability and image quality that punch well above its price.

Key Features

• Argon-purged waterproof housing — sealed and fog-proof for confident observing in any conditions
• Enhanced Multi-Layer Deposition (EMD) coatings on all air-to-glass surfaces for bright, clear images
• 4-element, 2-group optical design with edge-blackened elements to reduce stray light
• Fold-down silicone rubber eyecup for relaxed eye relief during extended sessions, including with eyeglasses
• 1.25" barrel compatible with standard focusers on all telescope types

Ideal For

• Deep-sky observers who want enough magnification to resolve detail in globular clusters, planetary nebulae, and smaller galaxies
• General-purpose viewing — a reliable medium-power option for star parties, outreach events, or quick observing sessions
• Observers with fast telescopes (f/4–f/5) seeking a moderate-power eyepiece that avoids over-magnifying