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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Swift Audubon 820T 8.5x44mm Waterproof Binocular

$599.99

Swift 747 Reliant 8x40mm Porro Binocular

$114.99

Carson Optics Stinger 12x32mm Portable Binocular

$49.99

Carson Optics Hawk 30mm Kids' Deluxe Ultra Binocular

$19.99

Swift Reliant 743 7-21x25mm Compact Zoom Binocular

$119.99

Carson Optics Stinger 10x25mm Portable Binocular

$44.99

Sightron SII WP Series 10x50mm Binocular

$144.99

Carson Optics Stinger 8x22mm Portable Binocular

$39.99

Sightron SI Series 8x25mm Binocular

$99.99

Sightron SII Blue Sky Series 10x32mm Binocular

$219.99

Swift 930 Ultra 10x42mm Waterproof Binoculars

$549.99

Barska 8x30 BATTALION Waterproof Binocular with Rangefinder

$201.99
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