These National Geographic 8x21 pocket binoculars fold small enough to slip into a jacket pocket or handbag, making them a handy companion for travel, game drives, sports events and walks. They use a roof prism design with fully coated BK-7 optics for a clear, true-colour image, and give 8x magnification with 21 mm objective lenses and a 125 m field of view at 1000 m. Diopter compensation lets you set the focus for each eye, and the foldable eyecups help if you wear glasses. They measure about 100 x 95 x 35 mm and weigh about 170 g. A carry case, strap and cleaning cloth are included.