Alpen's 8.5x50 high performance Shasta Ridge binoculars are fully waterproof, fully multi-coated, Phase coated, have long eye relief, and feature BAK4 optics that allow hunters, shooters, birders, boaters, and outdoor enthusiasts clearer, brighter, viewing under all conditions. The versatile 8.5 power magnifaction combined with the large 50mm objective lens produces a large 5.9mm exit pupil allowing maximum light transmission which is benificial at dusk and dawn. The sleek roof prism design is comfortable and more compact than traditional porro prism binoculars. 8.5x50 PHASE COATED Waterproof, Fog Proof Long Eye Relief, BAK4 Optics Fully Multi-coated BAK4 optics for clear, bright, high resolution images PXA™ phase coating for superior resolution and color fidelity (roof prism models) Fully multi-coated optics for maximum brightness Waterproof and nitrogen filled Long eye relief for full field of view for eyeglass wearers Twist lock eye cups Stylish ergonomic design Rubber armoring for protection and durability Soft rubber rain guards (roof prism models) Durable carrying case Premium quality neck strap ALPEN’s lifetime warranty ALPEN’s high performance Shasta Ridge binoculars are fully waterproof, fully multicoated, have long eye relief, and feature BAK4 optics that allow hunters, shooters, birders, boaters, and outdoor enthusiasts clearer, brighter viewing under all conditions. And, they feature ALPEN’s lifetime warranty. The full size models have a sleek roof prism design while the compact models are porro prism design. Both designs provide the performance required by the most dedicated sports optics users. Shasta Ridge binoculars meet the extreme allweather needs of today’s active adventurers. When your goal is top performance and great value, the ALPEN Shasta Ridge is your best choice.