The Celestron Nature DX 10x42 Binoculars are Celestron's new nature series and is the perfect companion for the outdoor explorer. These feature packed binoculars offer multi-coated optics, BaK-4 prisms and a fully waterproof exterior that is purged with air and filled with dry nitrogen gas to ensure a clear, fog-free viewing experience. The BaK-4 prisms with phase coating increases contrast and resolution for sharper and more detailed images. The multi-coated optics provides maximum light transmission for brighter images. The Celestron Nature DX binoculars offer a 2m close focusing distance and provide a detailed, up-close observation of subjects in close proximity, as well as subjects at a distance. The strong and polycarbonate body provides a strong and durable construction, whilst keeping weight to a minimum. The 10x42s offer a 10x magnification and feature a 42mm diameter and are suitable for general outdoor viewing.