Endurance 10 x 32 Binocular – Green extra-low dispersion glass for optimum clarity. Fully multi-coated optics to produce sharp images. Focus knob with 1.2 turns close focus from 6.6ft/2m. High resolution phase corrected BAK-4 roof prisms. Lightweight rubber coated mid-size top hinge chassis. Stay-on lens covers for maximum lens protection with twist-up eye cups with position stops for eye relief.