UP Binoculars 10x21 Black - PX61804

Dimensions: 3.26" x 4.33". FOV: 285ft. @ 1000yds. Porro prism. Actual magnification: 10x. Eye relief: 9.5mm. Objective clear aperture: 21mm. Carry case. Center focus. Uni-body design enhances durability by locking objective lens in a single housing and synchronizing the eyepiece movement. Aspherical lens elements assure the items on the edge of your field of view are just as sharp as those in the center. Focusing range: 9.24ft-infinity. Exit Pupil: 2.1mm. Eye Relief: 9.5mm. Relative Brightness: 4.4. Sliding eyepiece ring. Color: Black.