The Alpha Optics AC-2065 daytime binoculars are built from only the most exceptional quality glass to deliver a crisp and clear image. The glass features a special proprietary lens coating used in night vision technology to maximize light transmission for better performance in low light environments. The binoculars are built tough to withstand the harshest environmental conditions, including marine environments. Each device is rubber armored, completely sealed against dust, sand, and water, and also filled with nitrogen to prevent fogging of internal lens surfaces. Wide field of view reveals a larger portion of the horizon, allowing you to search more efficiently. Large 50 mm objective lenses have tremendous light-gathering ability. Multi-coated optics dramatically increase light transmission for brighter images with increased contrast and resolution. Large exit pupil provides maximum light during nighttime and low-light viewing sessions.