The 6x30 NatureView Porro Binocular from Bushnell has a lead-free optical path that is fully multicoated for enhanced contrast and image clarity. This NatureView binocular uses a Porro prism design, offering less light loss and greater depth of field than comparable roof prism designs. Twist-up eyecups and 20mm eye relief permit a comfortable viewing distance even while wearing eyeglasses. The 6x30 NatureView binocular features a weather-sealed housing with slip-resistant rubber armor that makes it well-suited for day hikes and other outdoor viewing tasks.