These binoculars feature aspherical lenses, an ergonomic chassis and quick central-focus to maximize long-term viewing comfort. High-resolution aspherical lens system is engineered to provide an extremely clear, distortion-free image over the entire field of view. Offers a field of view of 400 feet at 1000 yards, making them true wide-field-of-view binoculars. Constructed with an all-metal chassis and lens fittings housed in a tough, lightweight polycarbonate body. Body is ergonomically shaped, tripod adaptable and rubber coated for an easy grip and stylish carry. Diopter control allows easy compensation for common left eye/right eye vision imbalance. Multi-coated, anti-reflective lens coatings are engineered to deliver optimum brightness, high contrast, true color rendition and flare-free viewing. Utilizes BaK4 high index prisms for clear, round images free from vignetting.