Meopta Optika HD 8x42 binoculars

waterproof fog-free multi-coated lenses metal eyecups with rubber coating binocular housing made of magnesium alloy shock-resistant housing with rubber armor also available in the 10x42 version magnification: 8 x objective diameter: 42 mm field of view (m/1000m // ft/1000yds): 131 // 393 objective side field of view: 7.5 ° eye relief: 17 mm min. observation distance (m / ft): 2.5 / 8.2 exit pupil diameter: 5.2 mm twilight number: 18.3 transmission in daylight: 88 % transmission in twilight: 85 % eye width: 56 / 74 mm adjustment range diopter compensation: -4 / 4 height (mm / in): 138 / 5.4 width (mm / in): 127 / 5 depth (mm / in): 49 / 1.9 weight (g / oz): 650 / 22.9  Manufacturer information:Manufacturer: Meopta s.r.o.Kabelikova 1, 750 02 Prerov, Czech [email protected]