This binocular offers superb optical performance and value. This binocular is ideal for astronomy, marine, and bird watching. This binocular deploys Fujinon's unique EBC coating, allowing 95 percent light transmission. With a field flattener lens, it offers edge-to-edge sharpness, free of any discernible astigmatism or distortion. The Fujifilm Polaris 10x50 FMTR Binocular offers high optical performance and reliability which has made it a staunch favorite among professional users.