Celestron SkyMaster 25X100 ASTRO Binoculars with deluxe carrying case 25x magnification porro prism binocular Giant 100 mm objective lens offers maximum image brightness in low-light and long-range conditions Ultra sharp focus across the field of view Individual Eyepiece Focus to ensure optimal focus position Multi-Coated optics for sharp, clear views Suitable for long-range terrestrial or astronomical viewing Protective rubber covering for ultra-firm grip