Astronomical Binocular 20 X 80 Its grand opening multiple optical coatings on all lenses, offer an impressive ability to capture light to see the stars. And for Earth observation will have fabulous views over great distances, with large fields and a resolution that will leave you perplexed. These are just wonderful and well built binoculars. Each has an individual approach to each eye and a great visual relief. Your Prisms BAK-4 prisms and internal baffles assure detailed images and a comfortable contrast. Their barrels are reinforced with an aluminum bar that includes a hot shoe for attaching a tripod with a threaded 1 / 4 "-20 (recommended by use of a tripod for his great weight). Case included.ramiro@siriuscope.com