SkyMaster Binoculars are large-aperture offerings from Celestron, great both for astronomy or long-range terrestrial observing. The tripod adapter on the 20x80 model provides support and increased rigidity. These were never designed to be held in the hands. Take this beast where skies are dark and mount it to a tripod. Then be awed at their awesome ability to penetrate the inky depths of night, revealing the subtle nuances of galaxies and nebulae with all the advantages of using two eyes instead of one.