The Celestron Trailseeker 8x 42 Binoculars features a lightweight magnesium alloy frame that is durable & fully waterproof for use in any weather conditions. These high-level outdoor performance binoculars are equipped with phase & dielectric coated Ba K-4 prisms which dramatically increase light transmission through the prism system for unrivalled image quality & views. The Trailseeker is tripod adaptable & offers a close viewing distance of 16cm for detailed, up close observation of subjects in close proximity.