The TZ-821, Tracker™ is a compact, 8x21mm binocular. It has multi-coated lenses. The Tracker™ binocular has a center focus knob with an independent right diopter to adjust maximum focusing flexibility for all types of vision. These binoculars feature roll-down eyecups for eyeglass wearers.
Model Name Tracker™ Model Number TZ-821 Magnification 8x Objective Lens Diameter 21mm Prism Type BK-7 Lens Coating Fully Coated Field of View (ft. at 1000 yds.) 379 ft. at 1,000 yards Eye Relief 10.5mm Weight 5.0 oz Dimensions 4.4″ x 1.7″ x 3.3″ Accessories Pouch, neck strap and lens cloth