This high-grade Porro Prism zoom Olympus 8-16 x 40 Zoom DPS I Binocular feature 8-16x zoom optical power that brigns sports enthusiasts to easily focus on their game, good for keeping up with fast moving subjects. A large diameter lenses offer upgraded field of view and clear view under dark environment. They also provide UV ray protection so you never have to worry against the sun.These high-grade Porro Prism zoom binoculars feature 8-16x zoom optical power that brigns sports enthusiasts to easily focus on their game, good for keeping up with fast moving subjects. A large diameter lenses offer upgraded field of view and clear view under dark environment. They also provide UV ray protection so you never have to worry against the sun.