The Celestron Nature DX 12x56 Binoculars join Celestron's new nature series. 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. They offer a 12x magnification and feature a 56mm diameter making them suitable for low-light and general outdoor viewing. The BaK-4 prisms with phase coating increases contrast and resolution for sharper and more detailed images, while its 2m close focusing distance provide a detailed, up-close observation of subjects in close proximity, as well as subjects at a distance.