The National Geographic Expedition Series 10x42 pairs 10x magnification with BAK-4 prisms, fully multi-coated lenses, and waterproof construction — a rugged, all-weather binocular built for birding, hiking, and wildlife observation where durability matters as much as optical clarity.

Features

• 10x magnification with BAK-4 roof prisms — bright, high-contrast images that pull distant subjects into sharp detail
• Fully multi-coated lenses — maximum light transmission for clear views from dawn through dusk
• Waterproof and nitrogen fog-proof — sealed optics handle rain, stream crossings, and temperature swings without fogging
• 16.9mm eye relief with twist-up eyecups — generous clearance for comfortable viewing with or without eyeglasses
• 4.5-meter close focus — near enough for garden birds and trail-side wildlife
• Diopter adjustment — fine-tune focus independently for each eye
• Includes lens covers, neck strap, and carry case — field-ready out of the box

Ideal For

• Birders and wildlife watchers who need reliable 10x reach in a waterproof package that handles field conditions
• Hikers and trail users — fog-proof and waterproof construction means they perform in rain, humidity, and elevation changes
• Travel and sightseeing — a versatile 10x42 format that works for landscapes, architecture, and nature
• Eyeglass wearers — 16.9mm eye relief provides a comfortable, full field of view without removing glasses