Hawke Endurance ED Compact 15-45x60 Spotting Scope - Angled - 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.