The “42” in our 10x42 binocular refers to the diameter of the objective (front) lens in millimeters. Since the objectives will often be the largest portion of the optic, it will affect the overall size and weight of the binocular, and how much light it can gather.

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ATN BinoX THD 4.5-18x50mm 384x288 with HD Video Recording, Wi-Fi, GPS, Smooth Zoom Thermal Binoculars

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Firefield Emissary 8x21mm Compact Binocular

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Leupold BX-4 Pro Guide 10x32mm HD Roof Prism Binocular

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Leupold BX-4 Pro Guide 8x42mm HD Roof Prism Binocular (Kryptek Typhon Black)

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Leupold BX-4 Pro Guide 8x42mm HD Binocular

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Leupold BX-5 Santiam 8x42mm HD Binocular

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Leupold BX-5 Santiam 8x42mm HD Binocular (Strike Gear Sub-Alpine)

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Leupold BX-5 Santiam 10x42mm HD Binocular

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Alpen Rainier 8x42mm EDHD Binocular

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Bushnell Legacy 10-22x50mm Binocular

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Alpen Rainier 10x42mm EDHD Binocular

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Alpen Teton 10x50mm EDHD Binocular

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