Designed for the birdwatcher and avid outdoor adventurer, the Barska 10 x 42 binoculars have been designed with the features and quality outdoor enthusiasts expect. The Naturescape full size feature phase-coated and fully multi-coated optics with BAK-4 prisms for sharp, bright, clear high contrast views in all types of lighting and weather conditions. Their weight distribution and contoured shape minimizes strain and fatigue common during long observing sessions. It features large 42mm objective lenses to maximize light gathering. Close focus gives you a dramatic view of the action from a short distance and is balanced by a field of view that gives you the big picture.