Check the listing for details. Continental Opera Glasses /Case- Coated Lens. Condition: Used. Listed at 20.00 USD. The Continental Opera Glasses are compact binoculars with a 2.5x maximum magnification, designed specifically for opera glasses application. The lenses are coated for enhanced clarity and protection. This brand is known for producing quality optics, making these opera glasses a reliable and stylish accessory for opera enthusiasts. Additionally, the included case helps protect the glasses when not in use, making them convenient for carrying and storage.