Olympus N1240586 8-16X40 Zoom DPS I Binocular Prism type bk-7 porro/field of view at 1,000 yds 285.4 - 193.6 ft (87 - 59 M) Close Focus distance 32.8 ft (10.0 M) Eye relief 0.4 - 0.5 (10 mm - 12 mm)/relative brightness 25 - 6.3 Waterproof no/weight 27.9 oz (790 g) Dimensions: L x w x that 6.0 x 7.2 x 2.3 (152 mm x 182 mm x 58 mm) Zoom capability of 8  16x Anti-reflective lens coating for better image brightness Large center focus knob for fast, easy focusing Built-in dioptric correction adjusts to individual eyesight Comfortable ergonomic grips