Vortex Triumph HD Features The Vortex Triumph HD 10x28 uses select glass elements in its HD optical system to cut chromatic aberration and deliver exceptional resolution strong color fidelity and edge-to-edge sharpness in a compact 28mm objective package. Fully multi-coated lenses across every air-to-glass surface increase light transmission for a clear usable sight picture even as light fades. The roof prism design provides greater durability and a smaller footprint than a traditional porro prism binocular making the Triumph HD 10x28 easy to slip into a pocket or pack. Nitrogen purging and O-ring sealing keep the optic waterproof and fogproof ensuring reliable performance through rain humidity and temperature swings in the field. A true open hinge reduces overall weight and bulk for effortless handling and adjustable eyecups twist up and down to accommodate users wearing eyeglasses. The center focus wheel adjusts both barrels simultaneously and the diopter on the right eyepiece corrects for differences between the user s eyes for a crisp unified image. Rubber armor provides a secure non-slip grip along with durable protection against bumps and drops during hard use. Tripod adaptable despite its compact size the Triumph HD 10x28 gives hunters a simple capable and lightweight binocular that lets them focus on spotting game rather than fussing with complicated gear. Vortex Triumph HD Specifications Manufacturer: Vortex Model: Triumph HD Magnification: 10x Objective Lens Diameter: 28 mm Eye Relief: 15.0mm Angular Field of View: 5.2 degrees Linear Field of View: 279 @ 1000 yds Close Focus: 9.9 Interpupillary Distance: 56mm - 73mm Height: 5.0 Width: 4.8 Weight: 12.8 oz Tripod Adaptable: Yes Available At: GrabAGun