Pentax UP 10x21 Black BinocularsThe Pentax UP 10x21 Black binoculars are compact and lightweight binoculars featuring BaK 4 Reverse Porro prisms and fully multi coated lenses resulting in increased light transmission while minimizing internal glare to allow for a bright, crisp clear view. With 10x magnification you get a higher than average zoom in a compact sized binocular. Additionally the UP 10x21 series binoculars offer a 9. 2' close focus to observe closer objects in detail as