The Carson VP Series 10x42 BAK4 Prism Binocular has a slightly larger ocular power and field of view resulting in a nice, wide 62.9deg. AAoV and expansive 6.3deg. AOV. Take in the capacious view of purple-mountains-majesty or just scan the horizon for the adrenalin pumping game. BAK4 roof prisms with multi-coated optics and phase coating supply crisp, clear, color-true observing. The 42mm objective keeps it bright even in low-light twilight, overcast skies or dimly lit stadiums and concert halls. While waterproofing and fogproof protection prevents fogging, clouding and moisture damage. This glass is an intelligent choice when the call of the wild outweighs the catastrophe of the climate.