Made for epic adventures and harsh environments, the BX®-5 Santiam™ HD binoculars dominate other optics in their class. We designed the generous eyebox for long glassing sessions with no eye-strain. The advanced prisms and Twilight Max HD Light Management System ramp up light transmission and redefine low-light performance, clarity, and resolution, allowing you to squeeze more time out of the day, and pick out detail others can't.