Sig Sauer, ZULU 8 HDX binoculars utilize SIG SAUERS glass lenses pair high definition and high transmission glass for ultra-high resolution and light transmission. The ZULU8 HDX features HDX-Glass to enhance light transmission, resolution and definition afield; locking diopter ring and three position adjustable eyecups; IPX7 waterproof and fog-proof rating and can be mounted to tripod using the standard threaded adapter insert.