Big 20xpower binocular for Astronomy and Terrestrial viewing comes with huge 80mm aperture objective lenses provides bright, high-contrast views of the night sky with sharp resolution Giant 80mm lenses gobble up light for spectacular views of the Moon, planets, star clusters, and more! Fully multi-coated optics and BAK 4 porro prisms ensure maximum light throughput for bright, clear views Long 17mm eye relief for comfortable views - even while wearing eyeglasses! Includes built-in tripod adapter, soft carry case, and dust caps.