PEN1106 Features: * Waterproof binocular * Available in 8x or 10x magnification * BAK4 glass for clear, bright and crisp images * Fully multi-coated for maximum brightness * Waterproof sealed and nitrogen filled * Long eye relief and twist up eye cups for use with or without eye glasses * Lightweight and ergonomic folding body design * Rubber armoring for holding comfort and shock protection * Soft rubber eyepiece rainguard * Deluxe travel case and wide comfortable neck strap * Objective lens diameter: 42mm * Focus system: Center * Prism type: Roof * F.O.V. (ft @ 1000 yds): 367 for model no. 585 and 330 for model no. 588 * Exit pupil: 5.3mm for model no. 585 and 4.2mm for model no. 588 * Eye relief: 17mm for model no. 585 and 15mm for model no. 588 * Close focus (feet): 8.5 * Tripod adaptable * Diopter design: Twist-ring * Eye cups: Twist-lock Color/Finish: * PXA phase coated for superior resolution and color fidelity Warranty: * Manufacturer provides lifetime warranty