Size is expressed in two numbers, such as 7 x 35, 10 x 50, etc. The first number (7, or 10, for instance) tells you the magnification power of the binocular. The second number (35 or 50, for example) represents the diameter of the objective lens in millimeters - remember that's the big one up front. Generally speaking, the larger the objective lens, the brighter the view. So when you look in our catalog or at our website offerings, and see a set of binoculars that are 7 x 35, that means they are 7 power with a 35 millimeter objective lens.

When you look at binoculars with higher power, and larger objective lenses, size and weight of the entire package increases. If you're on patrol, in your vehicle, weight and size may not be a factor. You might opt for a set of 10 x 50's to pull in clear images from a distance. Same goes for aviation and water patrol duties. Your boat or plane or helicopter carries the binoculars.

If, however, you're part of a tactical or K-9 unit, requiring you to be away from your vehicle, to carry a great deal of gear in the field, and necessitating constant movement, lighter weight compacts may be what you'll want. Seven or eight power will do the trick in that case.

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