Vortex Diamondback HD 10x50 Binoculars 10x magnification 50mm objective lenses HD optical system .67 (17mm) eye relief Linear field of view: 315' @ 1000 yards Angular field of view: 6 Close focus distance: 6' Interpupillary adjustment range: 2.36-2.95 (60mm-75mm) Adjustable diopter Twist-up eyecups Center focus wheel ArmorTek lens coatings Dielectric prism coatings Phase correction Fully-multicoated lenses Roof prism system Rubber Armor texturized grip and protective armor Waterproof, fogproof, shockproof O-ring sealed and argon purged Tripod adapter compatible Length: 6.6 Width: 5.3 Weight: 30oz Includes lens cloth, comfort neck strap, Rainguard eyepiece lens cover, tethered objective lens covers, GlassPak binocular harness and case VIP Warranty, unlimited, lifetime, transferable