[Product Information]

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High index ED Glass objective lenses for the truest color rendition.
Fully Broadband Multi-Coated lenses –provides maximum throughput light transmission with the highest levels of contrast. Celestron Broadband coatings provide superb natural color fidelity and vivid color saturation.
Phase Coated BaK-4 Prisms with Dielectric High Reflectivity Coatings
Waterproof & Fogproof -Nitrogen purged.
Rubber Armored-- for protection
Ergonomic features such as open bridge body with thumb indentations & finger ridges to prevent slipping.
Metal Focus Knob, Diopter Ring, and Twist-Up Eyecups -for long life and precision movement.