Celestron SkyMaster Pro 20x80 BinocularsThe Celestron SkyMaster Pro 20x80 Binoculars are economically priced large aperture offerings from Celestron. They're great for both astronomy or long range terrestrial observing thanks to the significant light transmission of the 70mm objective lens, BaK 4 prisms, and fully multi coated glass further improves image quality, brightness and detail. The SkyMaster Pros are waterproof and nitrogen purged so they won't fog internally on a chilly night. The