Audubon 8x40 Family Binoculars Lightweight 8x40 binoculars for birding in the field from Sheltered Wings and the Audubon Society Crafted in sturdy fiberglass with precision ground, multi-coated lens for superior light transmission Field of vision spans 330 feet at 1000 yards; close focus for birds up to 10 feet in distance Adjustable wheel allows user manipulation of focus; neck strap and carrying case provided for transportation Binoculars measure 6.1 by 7 by 2.3 inches and weigh 2 pounds upon shipping; limited lifetime warranty