Easily carried in vest or coat pocket, in belt pack, or shoulder bag ED lens optical system provides sharp, clear images with vivid, well-managed color 9-27x magnification range spans binoculars and spotting scopes _Birder-friendly_ close focus distance: 10 ft. / 3m close focus satisfies birding field optic requirements Waterproof / Nitrogen filled -- Protected against wet weather, humid conditions, and other environmental challenges