The Vintage Focal 20-20-15 Folding Opera Glasses Binoculars are a compact and lightweight pair of binoculars made in Japan. With a maximum magnification of 2.5x and an objective lens diameter of 25mm, these opera glasses are perfect for a variety of applications including opera, general purpose viewing, and sports. The black color and roof/dach prism optical design make them a stylish and functional accessory for any enthusiast or collector. This model from Focal is a classic piece with a touch of nostalgia, perfect for those who appreciate quality optics and craftsmanship.