50 X 50 Vision Optical Power Zoom Military Style Telescope Army Green Eyepiece: 20mm. Objective lens : 35mm Color: Army Green. Field of view : 56M/1000M Materials :The telescope special engineering materials It have a elegant apperance and skid resistance design ,fine workmanship ,It also have the Anti-shake fetures . Application :Boating/Yachting / Sports /Bird Watching / Auto Racing / Horse Racing /Hunting / Theater / Beach / Travel