Inner focus optical design produces stunning optics and detail. Effortless focusing and impressive depth of field makes these binoculars quick and easy to use. The Nature-Trek binoculars come complete in a shock resistant polycarbonate body, providing a robust yet lightweight casing. All models are nitrogen purged to avoid fogging and they are sealed to be fully waterproof. The inner-focus optical design produces stunning optics. The high resolution image ensures no details are lost when viewing at long or short distances. With a close focus distance of 2m - 2.5m. The effortless focusing and impressive depth of field make these binoculars quick and easy to use. Twist-up eye cups make viewing easy with spectacles or sunglasses. Dioptre adjustment is smooth to operate making set-up easy. All Nature-Trek binoculars are supplied with protective lens covers and carry case.