Swarovski Optik Habicht Binoculars, 10x40mm (Black) Compact construction due to Porro prism system; High-contrast, particularly 3-dimensional images; SWAROTOP and SWARODUR coatings The 6-lens wide angle eyepiece of the 8x30 W and 10x40 W models offers an exceptionally large field of view; All lenses have a hard-wearing surface coating Perfect for close-range observation (3 m/10 ft. focusing distance); Impressive transmission values Sturdy light alloy housing; Central focusing wheel and center focus system for rapid focusing; Watertight and filled with nitrogen Leather or rubber armoring for shock absorption and noise reduction, pleasant to handle even in cold weather; Classic binocular design