The Nature DX 8x 56 binoculars joins Celestron's new nature series & is the perfect companion for the outdoor explorer. The optics offer a 2cm close focusing distance, 8x magnification & feature a 56mm diameter making them suitable for low-light viewing, whether it's at subjects in close proximity or general outdoor viewing. What's more, their multi-coated optics, Ba K-4 prisms & fully waterproof exterior 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, while the multi-coated optics provide maximum light transmission for brighter images.