VicTec 8X FMC BAK4 Prism Binoculars Telescopes for Outdoor Activities, Stadium Sports, Bird-watching, Hunting, Hiking Advanced BAK4 Prism with perfect light transmittance, provides you bright and vivid images without black background With 26mm eyepieces and 35mm ultra wide angle objective lenses, brings you broader field of view and more comfortable experience Up to 99.5% transmittance due to the Fully Multi-Coated (FMC) optical lenses, will take you to into a clear and bright world Nonslip rubber protective layer makes it skid-proof and shock absorption Suitable for outdoor activities, stadium sports, bird-watching, concerts, hunting, hiking, etc.