RadiantOrchid 8X21 Monocular Scope for Hunting, Camping, Surveillance Monocular Telescope Outdoor Sports Fully multi-coated lens for superior light transmission. 8X Magnification provides ideal magnification for most applications. Fold down rubber eyecups, convenient for use whether you wear eyeglasses or not. Field of view: 126m/1000m. Objective lens diameter: 21mm.