The nature dx 8x56 binoculars joins celestrons new nature series and is the perfect companion for the outdoor explorer the optics offer a 2cm close focusing distance 8x magnification and feature a 56mm diameter making them suitable for low light viewing whether its at subjects in close proximity or general outdoor viewing whats more their multi coated optics bak 4 prisms and fully waterproof exterior is purged with air and filled with dry nitrogen gas to ensure a clear fog free viewing