Andoer Mini 30 22 Binocular Telescope 30X Times Zoom HD Vision FMC Green Coating 10/3000m Necessary Binocular Prism BAK4 for Outdoor Travel Hunting Concert Model Code of 30 * 22 and Magnification of 30 Times. Objective diameter of 22mm and Eyepiece diameter of 12mm. Lens coating of FMC broadband green film. Prism system of BAK4, Field of view of 8.5 degree. Focusing Method of Rotary focusing & Focusing system of Central focus.