Lynx ED42 waterproof roof prism binoculars feature 42mm extra low dispersion objective (ED) lenses and phase- and dielectric-coated prisms that transmit 92% available light from the subject to your eye which produces an unbelievably bright and contrasty image. The magnesium alloy body styling is sleek and elegant. The charcoal rubber outer has a sandpaper-like texture which keeps the binocular secure in your and grip even when it's wet. Two-position twist-out eyecups give a full field of view with or without spectacles. The binoculars are JIS class 6 waterproof.