National Geographic Foldable Roof-Prism CP Binoculars 8x21

National Geographic Foldable Roof-Prism CP Binoculars 8x21. These pocket binoculars feature a roof prism design that is easy to manipulate for proper eye distance and quality optics made of fully-coated BK-7 glass. Offering a field of view of 413 feet at 1000 yards these binoculars magnify subjects eight times their standard observable size making them an ideal beginner tool for bird watching or other wildlife observation. Other features include a textured central focusing wheel rubber eyecups f