Designed and built to achieve a supreme optical quality, these binoculars will leave you breathless with the impeccable brightness and clarity of their special BAK-4 prisms with Phase Correction. This is an advanced coating technique that will force the light beams back into phase, thus improving the image definition and contrast and creating a sharper view, especially noticeable when observing fine details. The other features of the Emperor binoculars are: waterproof and nitrogen purged body, wide angle eyepieces, extra long eye relief and twist up eye cups, along with an attractive and edgy design. Features:- Phase corrected- Lightweight body- Bak-4 prisms- Nitrogen filled- Super wide-angle- Large eyepieces- Fully multi coated optics- Long eye relief- Waterproof- Rubber covered- Central focusSpecifications:- Field of View 1000m/yds: 98m/314.9ft- Exit pupil: 4.1mm- Weight: 760gr/26.8oz- Tripod Adaptable