All Action EX Binoculars are built on a combination of metal and lightweight polycarbonate chassis. Traditional Porro style glasss, waterproof, fogproof and shockproof. Bright, high-contrast. true color rendition and flare-free viewing. #8666-8x40-Field of view @ 1000 yds., 429', Weight; 30.1 ozs., Length&Width:5.4"x7.4, Eye Relief:17.2mm.