The Outland X 10x25 Binoculars from Celestron provide a wider field of view; an apparent angle of view of 63°. The binoculars include BAK4 prisms for a higher quality of color. The lenses are multicoated for better contrast and more brightness. Nitrogen-purged and rubber covering add that extra level of protection for all kinds of weather and terrain conditions. There are twist-up eyecups for eye-relief adjustment for eyeglass and sunglass wearers, all in an aesthetic and ergonomic design.