The celestron trailseeker 10x42 binoculars features a lightweight magnesium alloy frame that is durable and fully waterproof for use in any weather conditions these high level outdoor performance binoculars are equipped with phase and dielectric coated bak 4 prisms which dramatically increase light transmission through the prism system for unrivalled image quality and views the trailseeker is tripod adaptable and offers a close viewing distance of 25m for detailed up close observation of sub