The Omega Series 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 binocular is rubber armored, completely sealed against dust, sand, and water, and also filled with nitrogen to prevent fogging of internal lens surfaces. The model 7x50 C is also equipped with an illuminated compass in the field of view. Covered by manufacturer lifetime warranty.