The Olympus Magellan EXWP I 8x42 uses high-index BaK-4 prisms and 42 mm objective lenses to provide a clear and bright view. These binoculars sport a sleek body and steady grip, ensuring comfortable handling. They provide long eye relief and feature twist-up/down eyecups so you can enjoy use them for extended periods of time. In addition, these binoculars are fog proof and waterproof.