Barr & Stoud Sahara 10x42 Roof Prism Binoculars The Barr & Stroud Sahara 10x42 is a rugged go anywhere binocular. Equally at home on Lake Naivasha, the beach at Bridlington or a day at the races. This is a compact roof prism design that makes an ideal all round performer with good light gathering ability. The binocular focuses down to just under 2m making it ideal for naturalists and birdwatchers alike.The binocular delivers a powerful 10x magnification. The Sahara range from Barr & Stroud feature rugged construction combined with brilliant optics. They are waterproof to a depth 1.5m of water for three minutes, plenty of time to retrieve them if you have dropped them in a stream or puddle.