Celestron Nature DX 10x42 ED BinocularsCelestron Nature DX 10x42 ED Binoculars have all the features you expect at this price, and one you don't expect. The surprise is Extra low Dispersion (ED) glass in the objective lens. Other features include fully multi coated lenses, phase corrected BaK 4 prisms, waterproof and nitrogen purged polycarbonate body with rubber armoring. Close focus is 6. 5' and field of view is 309' at 1000 yds.