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