Secuvox The Most Compact Longest Zoom Binocular Compact long-zoom binocular with 20x to 140x magnification range 30mm objective lenses with fully coated BaK-4 glass Easy-to-adjust center focus wheel; porro prism system Rugged housing stands up to elements; pocket-sized body Measures 4.5 x 4.9 x 1.9 inches (W x H x D); weighs 0.4 pounds