The NatGeo Binocular 10X50mm GameBak4PorroPrism a high-quality optic zoomer from a reputable brand. Since it’s got a large magnification (10x) and wide objective lens (50mm) collecting tons of light, it is suitable for viewing game in the outdoors. Due to its optical stability it’s even suited to beginners. But that’s only the basics.

The Bak4 glasses have a rounded exit pupil. This results in better light transmission and sharper images than the more usual BK7 glasses, which have a square-shaped exit pupil. Similarly, BK-4 prisms produce acceptable images, but their images are more rounded than in BAK-4 prisms.

BAK4 stand for barium crown glass and is the best material for making prisms. It has a higher refractive index and lower refraction than other materials, which makes it transmit light better without losing luminosity due to internal reflections within the device. Hence, from the start, know that this product offers some exceptional quality features!

The NatGeo Binocular 10X50mm GameBak4PorroPrism is an elegant Porro-prism binoculars with excellent optical characteristics. The fully coated Bak4 optics guarantee a decisively higher light transmission through the glass, thus increasing color fidelity and contrast. Diopter compensation is standard with these models. This makes these binoculars suitable for beginner birders or nature observers. Even on windy days, due to the 10x magnification, a stable image is provided. The 50-mm objective lenses gather enough brightness for observation even in twilight conditions. A carrying pouch and neck strap are included. For longer observations, a tripod-adapter thread is integrated.

Magnification: 10x
Objective Diameter: 50mm
Field of View: 96/1000m
Optical System: Porro Optics, BAK4 barium crown glass
Dimensions: 19 x 19.5 x 6.2 cm