Incredible Clear Vision Super Clear, The fully coated optics, meanwhile, ensure superior light transmission and brightness, helping you see just about any target, whether you're searching for birds or trying to get a better view of the stage. High Contrast and Resolution Images See things 16X closer and Get Clearer and Brighter with 52MM Objective lens and 18.5mm eye lens. The larger the objective lens, the more light that enters the binocular, and the brighter the image.Prism material,BAK4, clear image without black bars,it makes Super Clear and Sharp Images. Waterproof & Fog Proof Design the mirror is full of the highpurity nitrogen waterproof and antifogging You can use it in raining day and humid environment and have no need to worry about this item Wide field of view 66M/ 8000M, it will show you a clearer and farther view, good for bird watching, hunting, hiking, or sightseeing etc.