The Sightron SIII 10x42 ED II Binoculars are the 10x magnification variant of Sightron's SIII ED II series, manufactured in Japan and delivering premium optical performance through fully multi-coated ED glass lenses on all surfaces, phase-correction coated BAK-4 roof prisms, and a nitrogen-purged, fully waterproof magnesium alloy body. The 10x configuration is well suited to long-range hunting and precision target identification, offering a 4.2mm exit pupil and 18mm of eye relief with twist-up/twist-down eyecups that accommodate both eyeglass and non-eyeglass wearers comfortably. At 25.7 oz it is slightly lighter than the 8x42 ED II sibling, making it an excellent choice for backcountry hunters who want maximum magnification without a significant weight penalty, and it is backed by Sightron's Lifetime Performance Guarantee. Sightron SIII10X42ED II 10x Magnification 42mm Objective Lens 25.7oz Waterproof Binoculars w/ Carry Case, Strap, Lens Covers/Cloth 25181