Sightmark Solitude 10x42 BinocularsThe Sightmark Solitude 10x42 Binocular offers quality features including fully multi coated lenses for rich contrast and detail as well as multiple layers of anti reflective coatings to increase light transmission though it's phase corrected BaK 4 prisms for brighter, clearer images. Complementing the optics is a long 18mm eye relief and twist up eyecups which is helpful for eyeglass users. The 10x42 Solitude binocular has a nitrogen filled, fogproof