BARSKA Blueline 10x40 Close Focus Monocular Close-focus monocular with 10x magnification and 40mm objective lens Large, fully coated objective lens for superior clarity and light transmission 7-foot close-focus distance is ideal for birding or nature studies Rugged, nonslip rubber body; 288-foot field of view @ 1,000 yards Includes neck strap and carrying case; weighs 9 ounces