The 10x42 H20 Porro Binocular from Bushnell delivers a fogproof housing and rubber armoring textured with soft ridges to maintain grip. This Porro prism binocular offers less light loss and greater depth of field than comparable roof prism designs. A multicoated lens system and high-transmission BAK4 prism glass allow these weather-sealed glasses display clear and bright images that are crisp with detail.