Wide apparent field of view; Field of view = 435ft @1000yds; High-quality multilayer coating; Phase-correction prism coating enhances resolution and contrast; Lead-and-arsenic-free glass; Magnesium alloy body is lightweight and extremely durable; Wider available Interpupillary Distance Adjustment designed to fit virtually everyone - 56mm-74mm; Locking diopter control maintains your personal setting; Long eye relief and turn-and-slide eyecups facilitate optimum eye position; Closer minimum focus distance-just 6.6 feet