OP Swiss 15 - 45x80 mm Zoom Binoculars Astronomical Binoculars Serious 80mm dia binoculars, for serious gazing. These big boys measure 13" long and weigh 4. 6 lbs (they have a 1/4"-20 tripod mount) and have coated optics, a rubberized housing, roll-back eyecups, interpupillary adjustment (say that ten times fast) and focus, and a variable zoom from 15X to 45X. They come with a chamois, neck strap and a padded, zippered black leatherette carrying case with a strap. Not for the opera, unless you really want to see the fat lady&#39;s tonsils. Near focus of approx 25 feet. Great viewing, whether you&#39;re into wildlife or astronomy. Includes a 2-year manufacturer&#39;s warranty.