Our field-tested 8-x-40 binoculars bring a century's worth of our experience to your field expeditions. These top-in-their-classÿwaterproof binoculars feature precision optics with full multi coatings toÿenhance brightness contrast sharpness and colour accuracy. Porro BaK-4ÿprisms provideÿedge-to-edgeÿillumination making these ideal not only forÿbirders but also for low-light viewing and astronomy. They boast a rugged.ÿrubber-armored water-resistant body; comfortable long eye relief a 469-foot-wide view at 1.000 yards and the ability to focus on objects just 15 ÿfeet away. Strap and case included.Technical Specifications.