Multi-coated lenses for bright and clear viewing. Innovative design with a tough, waterproof body. Environmentally friendly "eco-glass" used for lenses and prisms. Compact type porro binoculars. High refractive index Bak4 porro prisms and multi-coating ensure a clear view. Long eye relief design and twist-up eyepieces for comfortable viewing with glasses on. Overview Fujifilm's KF Series Binoculars offer superior optics, featuring multi-coated lenses for bright and clear visibility. The innovative design boasts a tough, waterproof body, while environmentally friendly "eco-glass" is used for lenses and prisms. Compact and efficient, these porro binoculars utilize high refractive index Bak4 prisms and multi-coating for a clear view. The long eye relief design and twist-up eyepieces ensure comfortable viewing, even with glasses on.