Binocular Guides

Start here if you are new to binoculars or want to understand them properly. These guides explain what the numbers on binoculars mean, how to choose the right pair for how you will use it, how to buy without regrets, and how to clean and store binoculars safely. Each guide is based on published manufacturer and expert sources, names those sources, and says where they disagree.

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Guides

What Do the Numbers on Binoculars Mean?

Binocular numbers (such as 8x42 or 10x50) indicate two specifications: the first number represents magnification power, while the second indicates the objective lens diameter in millimeters.