Binoculars specifications include two numbers, such as 8 x 25. The first number is the magnification or power. Over 10 power it becomes hard to hold the binoculars steady enough. The second number is the diameter of the objective lens (the one furthest from your eye) in millimeters – 25mm in our example. The larger the objective lens, the more light enters the binoculars giving a brighter, sharper image. Larger objective lenses are better in low light conditions such as dawn and dusk. Scratching the lens can damage binoculars. Rubber armored binoculars absorb shocks, protect from the elements, and provide grip.Several models of binoculars are focus free with the focus on infinity. For viewing of birds and other small wildlife make sure your binoculars can close focus. All our binoculars are suitable for outdoor and adventure use and are guaranteed against faulty workmanship