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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Alpen Rainier 8x42mm EDHD Binocular

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Alpen Rainier 10x42mm EDHD Binocular

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Alpen Teton 10x50mm EDHD Binocular

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Bushnell Legacy 10-22x50mm Binocular

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ATN 4-16X BINOX 4K Binocular

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Bushnell Marine 7x50mm Porro Prism Binoculars

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Bushnell H2O Series 7x50mm Porro Prism Waterproof Binoculars

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Bushnell Natureview 10x42mm Roof Prism Binoculars

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Bushnell H2O Series 12x42mm Porro Prism Waterproof Binoculars

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Bushnell Powerview 10x50mm RTAP Porro Prism Binoculars

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