PEN1100 Features: * Waterproof binocular * Available in 8x or 10x magnification * A-lock diopter locking system keeps adjustment settings in place * Long eye relief for full field viewing when wearing eye glasses * 1.5 Turns from close focus to infinity for quick image focus * Textured body covering for a sure yet comfortable grip * O-ring sealed and nitrogen filled for water proof and fog proof security * Quick release neck strap system and premium quality carrying case * Objective lens diameter: 42mm * Focus system: Center * Prism type: Roof * F.O.V. (ft @ 1000 yds): 393 for model no. 75 and 341 for model no. 77 * Exit pupil: 5.3mm for model no. 75 and 4.2mm for model no. 77 * Eye relief: 18mm for model no. 75 and 16mm for model no. 77 * Close focus (feet): 6.5 * Type of neck strap: Premium extra wide * Tripod adaptable * Type of case: Leatherette * Eye cups: Mult-position twist lock Construction: * Magnesium body construction provides strength and shock resistant durability Specifications: * Extra large BAK-4 prisms with SHR metallic coating, PXA phase coating, and UBX multi-coating for exquisite optical performance Warranty: * Manufacturer provides lifetime warranty