Their precision-engineered Porro prisms and fully coated optics maximize light transmission through to the eye, creating an image that is clear, bright and detailed. They provide a large field of view, enabling you to scan your surroundings quickly, and the InstaFocus lever provides rapid focusing on moving targets. The binoculars are built for durability, with tough rubber armor that protects the optics from impacts. It also provides a secure non-slip gripping surface, keeping them securely in your hands in all weather conditions.