Dielectric Coatings provide increased light reflectivity Fully Multi-Coated optics to produce sharp images Focus knob with 1.5 turn - close focus 8.2ft/2.5m High resolution Phase Corrected BAK-4 roof prisms Water repellent coating on objective lenses Lightweight rubber coated magnesium alloy chassis Stay-on lens covers for maximum lens protection Replaceable twist-up eye cups with position stops