PV Series, designed with the sports enthusiast in mind, are built tough and offers a host of popular features.Traditional porro prism optical construction ensures edge to edge clarity and maximum light transmission.Roof prism optical construction afford the user a reduced weight and size. Ideal for the user on the go.Center-wheel focus design with separate right ocular adjustment allows compensation for vision differences between the users eyes. Multi coated lenses decrease light and image refraction aswell as reduces lens flare, while helping to maintain accurate color rendition.Various models in the PV Sport line are fully or partially rubber armored in an effort to reduce shock damage and improve your grip in bad weather. Each pair of binocular includes a nylon carry case, shoulder strap and lens caps.