The Outland X 8x25 Binoculars from Celestron provide a wider field of view with an apparent angle of view of 65.6°. They include BAK4 prisms for a higher quality of color. The lenses are multi-coated for better contrast and more brightness. Nitrogen purged with 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/sunglass wearers in an aesthetically pleasing, ergonomic design.