These Docter Optic ED 30x80 binoculars feature an open hinge to connect the two halves of the body, one-hand "through grip", special extra-low dipersion glass lenses to reduce color dispersion, Docter multitop broadband coating for high-contrast images, click-stop twist up eyepieces, and a large exit pupil focus length. Noblex | Docter Optics 30x80 ED Binocular with backpack