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ULTRA PORTABLE DESIGN: The Zoom Tube is an extremely lightweight, compact, and ultra-portable monocular (weight: 9.5 oz.) featuring Fully Multi Coated optics, a central focusing system, and a Swiss-designed Bak4p prism for a brilliant field of view (384ft @ 1000yds) wherever you travel. Scratch-resistant and water-resistant, this durable monocular is built to go anywhere to deliver bright, crisp views for birdwatching, hiking, camping, wildlife observation, and traveling. FULLY-MULTI COATED OPTICS: Excellent clarity and brightness from a special lens coating formula; each lens element is layered with anti-reflective coating featuring a low refractive index, with each surface treated with multiple layers for a sharp, bright image and exceptional color clarity to the edge of the field of view. Engineered to support smartphone photography and videography, simply align your smartphone to take a picture, capture the moment, and share. WATER-RESISTANT: The IPX4 ingress protection rating means you can use the Zoom Tube in any weather: rain, fog, and snow; it's designed to perform in the field. FEATURES: Multi-stop twist up eyecup mechanism offers three distinct positions to enhance the viewing experience, perfect for eyeglass wearers and the naked eye. A 1/4 20 threaded tripod adapter built into the frame enables the Zoom Tube to be mounted on a tripod for stable viewing