These binoculars will get you closer. Actually, ten times closer!And you can only get them from West Marine!From daytime sightseeing to nighttime stargazing, our Shoreline 10 x 50 Waterproof Binoculars might just be your best option. Not only does their compact size and light weight (24 ounces) make them easy to grab and go, their included padded carrying case can be stashed in your backpack, duffel bag, dry bag, glove compartment and lots of other places. Plus, they're waterproof so a rainy day won't keep you from spotting that bull moose before he spots you. Their larger objective lenses are perfect for amateur astronomers since they are able to transmit more light through the binoculars and help you see better in the dark. You'll enjoy nature viewing in large, open areas and getting up close to the action at sporting events.MagnificationJust what does the 10 x 50 mean with these binoculars The 10 identifies the power of the lens. Objects will appear ten times closer than they do with the naked eye. The 50 stands for the diameter of the objective lenses (the ones furthest from your eyes) in millimeters. The larger the objective lens, the more light can enter the binoculars. The more light they can gather, the brighter objects will appear—particularly important in low light conditions like cloudy days or when fog or rain are part of the equation.Field of ViewThis specification is expressed with 1,000 yards as a standard for reference. These Shoreline binoculars have a field of view of 289 feet at 1,000 yards. That means you can see a 289-foot wide object at a distance of 1,000 yards.Center FocusAre these binoculars hard to focus Not at all. A diopter (that ridged collar on the right side eyepiece) adjusts for the difference between your eyes (if there is any). Once you set that, simply turning the center focus knob will adjust the focus for both eyes simultaneously. This set-up makes it easy to view something quickly since you only have to turn the center focus knob when you point them at objects of varying distances.PrismsThis pair of binoculars has BaK-4 prisms that use a dense, fine barium crown glass which eliminates internal light scattering and produces sharper images.