ltra Compact and Feather Weight Suiting the needs of wildlife enthusiasts and outdoor travelers, the Audubon 8x40 & 10x40 Intrepid binoculars provide excellent optics built to withstand the rigors of nature. With fully waterproof housings and nitrogen purging, you'll be assured they will stay free from water damage and internal fogging. Comes with protective carry case and wide comfort neck strap. Precision ground, fully multi-coated lenses and high index BAK-4 prisms for excellent color fidelity and resolution, even in poor lighting conditions Large center focus allows smooth, precise image adjustment Waterproof and nitrogen-purged Long eye relief for comfortable viewing, even when wearing eyeglasses/sunglasses Rubber-armored housing for non-slip, secure grip, even when wet! 8 x 40 Intrepid Specs 10 x 40 Intrepid Specs MAGNIFICATION: 8X MAGNIFICATION: 10X Field Of View: 315 ft@1000yds Field Of View: 270 ft@1000yds Eye Relief: 19mm Eye Relief: 19mm Close Focus: 10 Ft. Close Focus: 10 Ft. Weight: 22 oz. Weight: 22 oz. Dimensions: 5.4" x 7.1" x 2.3" Dimensions: 5.75" x 7.1" x 2.3