The National Geographic UG4038 10×42 Single Bridge Binocular is a pair of binoculars that are designed for outdoor enthusiasts who want to enjoy clear and bright views of distant objects. They are waterproof, fog-proof, and shockproof, making them suitable for all-weather conditions. They also have a floating strap that prevents them from sinking in water. They have a roof prism system that uses BAK-4 glass to produce sharp and contrasted images. They also have a fully multicoated lens that reduces glare and enhances color fidelity. They have a twist-up eyecup system that adapts to users with or without glasses, and a diopter adjustment that fine-tunes the focus of the right eyepiece. They also have a tripod connection thread for stable viewing. Here are the main specifications of these binoculars:
-Magnification: 10x
-Objective diameter: 42 mm
-Field of view: 110 m at 1000 m
-Eye relief: 20 mm
-Exit pupil: 4.2 mm
-Lens coating: Fully multicoated
-Body: Waterproof, fog-proof, and shockproof
-Eyecups: Twist-up
-Diopter compensation: Yes
-Tripod connection thread: Yes
