Binoteck 10x42 Binoculars for Adults Professional HD Roof BAK4 Prism Lens Binoculars for Bird Watching Hunting Travel Sports Opera Concert with Carrying Bag 10 lbs

Here's how to focus: 1: Close your right eye-focus with the left and rotate the central knob until the image is clear. 2: Close your left eye-rotate the right eyepiece knob until the image is sharp and clear. 3: Bend the binoculars until you can get a single circular view. Specifications: Objective lens diameter: 42mm Eyepiece diameter: 18mm Near focal distance:5m Exit pupil distance: 10mm Objective lens coating: FMC broadband Focus system: Center & Right eye Angle of field: 5.5 degrees Viewof field: 305ft/1000yds Weight of binoculars:1.09lb/498g Waterproof grade: IP55 Life waterproof Package: 1 x Binoculars 1 x Cleaning Cloth 1 x Carrying Bag (with strap) 1 x User Manual 1 x Neck strap 1 x Eyecup 1 x Objective Lens Covers