The Cassini C-103060 features 60mm objective lenses and brings images 10 to 30 times closer to you than the naked eye. The C-103060 is pre-packed with a binocular tripod and tripod adapter and can be mounted to the tripod as shown in the picture on the left for hands free viewing. The prisms are positioned in a Porro prism design affording them increased depth perception over other binocular designs. Additionally the C-103060 features fully coated optics for improved glare reduction, water resistant comfort grip rubber armoring, full range center focus and binocular tripod socket. Included with the Cassini C-103060 is a carrying case, neck strap, lens cloth and protective eye caps. The Cassini C-103060 features fully coated optics for improved glare reduction. The Cassini C-103060 10-30x60mm Zoom Binocular Features and Benefits: Zoom Design Water Resistant Binocular Table Top Pan Head Tripod Binocular Tripod Adapter Comfort Grip Rubber Armoring Full Range Center Focus Fold Down Rubber Eye Guards Binocular Tripod Socket Shoulder Case and Strap Neck Strap Lens Cloth The Cassini C-103060 10-30x60mm Zoom Binocular Specifications: 10x to 30x Power Zoom 60mm Objective Lenses Fully Coated Optics Linear Field of View: 180′(10x) @ 1000yds Angular Field of View: 3.4°(10x) Minimum Focus Distance: 40′ at 10x Exit Pupil Size: 6mm(10x) to 2mm(30x) Eye Relief: approx. 8mm - 10mm Interpupillary Distance: 57mm to 73mm Relative Brightness Index: 36(10x) to 4(30x) Twilight Factor: 24.49(10x) to 42.43(30x) One Year Limited Warranty