Endurance ED spotting scopes provide the performance to get close to the action and the durability you demand. All magnifications are constructed with ED glass reducing the potential for chromatic aberration. ED glass controls color fringing and allows an improvement in clarity and crispness of the image, highly recommended by nature enthusiasts. All lenses are Fully Multi-Coated and prisms Dielectric Coated for increased reflectivity. Endurance scopes feature a dual focus knob (coarse and fine), 3x ratio eyepieces with twist-up eye cups and retractable sunshades. All scopes are supplied with lens covers and stay-on soft cases. Features: Extra-low dispersion glass for optimum clarity Dielectric coatings designed to increase light reflectivity Fully multi-coated optics to produce sharp images Close focus - see detail from 16.4ft/5m BAK-4 porro prisms for intense color and contrast Dual focus knob to achieve ultra fine focusing Body rotation for viewing in virtually any position Stay-on soft scope cover for maximum protection Twist-up eye cup and pull out sunshade Digi-scope compatible for use with your camera