What does the first number and second number mean in the description of bincoulars?

The numbers in the description of binoculars typically refer to their magnification power and the diameter of the objective lenses.

  1. The first number represents the magnification power, indicating how many times closer the object will appear compared to the naked eye. For example, if the first number is 8, it means the object will appear eight times closer.

  2. The second number denotes the diameter of the objective lenses in millimeters. This measurement determines how much light the binoculars can gather, affecting brightness and clarity, especially in low-light conditions. A larger objective lens diameter allows more light to enter, resulting in brighter images. For instance, if the second number is 42, it means the objective lenses have a diameter of 42 millimeters.

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