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What is 4x30 Binocular?

Updated: 10/25/2022
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13y ago

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Binoculars are specified by numbers such as 4×30, the first number gives the magnification of the object and the second number gives the aperture in millimeters. Good binoculars with a large aperture (50 mm or more) are useful at night for astronomy.

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13y ago
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Q: What is 4x30 Binocular?
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