Carson GreyHawk 10-30x 21mm Compact Zoom Binocular (CZ-021) Compact Zoom Binocular | 10x-30x Magnification | 21mm Objective Lens Diameter Prism Type: BK-7 | Lens Coating: Multi Coated | Eye Relief: 7.5mm  12mm Field of View: 84 feet  173 feet at 1,000 yards | Weight: 9.6 ounces Included with Pouch, Neck Strap and Lens Cloth | Dimensions: 3.75x4.2x1.625 No Fault Warranty