Hawke Endurance Close Focus Binoculars have been designed for performance, durability & comfort. The high grade BAK4 optical systems have lenses that are fully multi-coated with ETE Microlux. This type of optical set-up ensures colour contrast is defined, the light transmission is high & the Edge-To-Edge clarity is sharp & clean. The tough waterproof body is manufactured to the highest standards out of die-cast aluminum. This type of body offers greater stability (over plastic) for the precise near focussing system. The body is encased by stylish green rubber armour, offering protection whilst in the field. The generous eye relief, coupled with graduated twist-up eye cups makes viewing comfortable, even for eyeglass users. Whether Endurance CF binoculars are used for nature viewing, sports or general outdoor viewing use, you can be sure they won"t let you down. 42mm - Incredible performance from Endurance CF For incredible performance you will not be disappointed in the full size 42mm objective Endurance CF binoculars from Hawke.