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