All Rainier™ binoculars push the limits of optical perfection. All optical components receive our exclusive UBX™ multi-layer coating for maximum light transmission. The extra large BAK-4 roof prisms are coated with over 60 layers of Alpen’s SHR™ metallic and PXA™ phase coatings to deliver the best brightness, clarity, and color fidelity. Large-diameter lens elements throughout the optical system provide an enhanced field of view and eye relief for easy viewing.
