These binoculars are highly compact for their 50 mm exit lens - the larger the lens, the better binoculars perform in dim conditions. Outdoor II series binoculars offer performance at a very affordable price point. As a bonus, this model has a tripod thread. - Measurements: 170 x 135 x 62 mm - Waterproof, IPX7 - Rubber coated for protection and excellent grip - BK7 roof prism - MC anti reflection coating - Magnification: 10x - Exit pupil 5 mm - Outer lens diameter: 50 mm - Field of view: 5.2° - Apparent field of view: 52° - Field of view at 1000 meters: 91 m - Eye relief: 17.5 mm - Diopter adjustment range: +/- 2 - Twilight factor 22 - Closest focus: 5 m - Pupil distance 61 - 76 mm - Eye cups can be turned down, for compatibility with eye glasses - 10 year guarantee