The aspherical lenses of the Nikon Action Binoculars reduce eye strain and maximize viewing comfort. Large exit pupils deliver excellent light transmission. Multicoated lenses and high-index BaK-4 prisms. Zoom model has a versatile 10-22x zoom range and 50mm objective lenses. Rubber-armored ergonomic bodies. Center-focus adjustment. Action Extreme binoculars feature center-focus, porro-prism construction that is compact and lightweight. Exclusive Eco Glasslightweight lenses and prisms. The all-metal chassis is crafted with lens fittings in a tough, lightweight polycarbonate shell. Twist-out eyecups and long eye relief. Waterproof, fogproof and shockproof construction.
Good overall choice
Although I've seen them for less, Altrec's free shipping and excellent customer service outweigh minor savings elsewhere. These binoculars are a good choice for general field observation of wildlife; clear, sharp images, good light transfer, etc. I especially like the comfort of their ergonomic hand- and thumb-holds, and their light weight.