The National Geographic Expedition Series 8x25 binocular offers loads of premium features in a compact package ideally sized for grab-and-go adventures. This handy binocular slips easily into a backpack pocket for hiking and is lightweight enough to use with the included neck strap for viewing live events or extended observing. For added versatility, the binoculars are waterproof and impervious to internal fogging for all-weather performance. In terms of optics, the compact binocular features superior Bak-4 prisms and fully multi-coated lenses to maximize the brightness potential of the 25mm aperture. The 8x magnification power captures crisp details – especially at shorter to mid-range distances – and offers a nice field of view for easier tracking of moving subjects. Additional features include diopter adjustment for proper focus for each eye and twist-up eyecups for comfortable viewing.