Please note: This text was taken directly from the manufacturer.
Eyeglass wearers love our UltraView series of binoculars not only for their 22mm eye relief but also their great light-gathering capabilities and superb optics. Just twist down the rubber-covered eyecups and, with your glasses or sunglasses on, you can still take in the whole field of view. UltraViews contain high-index BAK-4 glass prisms, and all optical surfaces are fully multi-coated for maximum light transmission and minimum reflection. Big 50mm objectives and generous 6.5-deg viewing field make UltraViews suitable for terrestrial observing and astronomy. The cast-metal alloy bodies are rubber-armored for water resistance and better grip. Each model is threaded to accept an L-adapter for tripod mounting. Nylon case and deluxe wide-neck strap are included. Ten-year limited warranty.