Features: Type Roof Prism Magnification 8x Objective lens diameter 42 mm Exit pupil diameter 5.3 mm Real field of view 7.5-degree Apparent angle of view 55.3-degree Figure based on ISO 14132-1?2002 calculation. Field of view at 1,000m 131 m Relative brightness 27.6 Eye-relief 18 mm Diopter adjustment range -2-+2 Eye interval adjustment range 56-70 mm Close focusing distance 1.5 m Weight (g) 670 g Width 131 mm Size is measured by eye interval adjustment at max. (mm) and eyecup (turn-and-slide) at min. length (mm). Height 140 mm Size is measured by eye interval adjustment at max. (mm) and eyecup (turn-and-slide) at min. length (mm). Depth 53 mm Size is measured by eye interval adjustment at max. (mm) and eyecup (turn-and-slide) at min. length (mm). Lens construction 9 Elements in 7 Groups Coating Full multi-coating, Phase-correction Coating, Dielectric multilayer prism coating, Water & oil repellent coating, ZERO Coating ED Lens Waterproof Waterproof designed by nitrogen-filled body, and can be submerged to a depth of 1 meter for up to 5 minutes. But can be not used in underwater. Strap width 12 m What's in the box All OLYMPUS binoculars come complete with case, neckstrap and protective lens covers