features: 10x 42 HD MAGNIFICATIONThis high power magnification monocular with 8X magnification and 42mm object lens diameter monocular,1000yards large field of view, provides a bright and crisp sharp image and different fields of view,there are no black stripes.Ideal for outdoor enthusiasts and wilderness explorers, for bird watching, wildlife, hunting, hiking, mountaineering, camping, surveillance and traveling,watching scenery FMC LENS & BAK-4 PRISMThe zoom telescope is equipped with BAK-4 prism and fully multi-coated lens, guaranteeing superior light transmission and brightness.The light transmission reaches up to 99.8% visibility.high contrast and resolution images,which ensures less distortion,let you experience clearer, more realistic, and more detailed images. LIGHTWEIGHT AND PROTABLEAn adjustable eye cup allows you to twist up and down easily and rapidly for optimal viewing even while wearing glasses. provides you with a comfortable watching experience outdoors. Easy to focus with one hand,both adults and children can use it. Specifications: Instrument magnification: 8 Pupil exit distance: 4.5mm Outlet pupil diameter: 5.2mm Prism: BAK4 Field of view: 142m/1000m Resolution: 6.3 Weight: 284g