Monocular Telescope / Waterproof 16x52 Optics Zoom Lens Monocular Scope for Hunting, Camping, Surveillance Suitable for concerts, sporting events, hiking, hunting, camping, adventuring, bird watching and survive game 16X52 Magnfication- Offers an high power magnification and a 52mm objective diameter,object lens:52mm ,eye lens:18mm. Field Of View (m):66m/8000m Dual Focus Design- Front and back zoom adjustable, can look much longer distance and more distinct Waterproof- The mirror is full of the high-purity nitrogen, waterproof and antifogging. You can use it in raining day and humid environment, and have no need to worry about this item Night Vision- With low-light-level night vision built-in design, it has clear vision when there is reflect light at night, helping you see things in low light