Celestron Astro Fi 90 mm Wi-Fi Refractor TelescopeInnovative WiFi technology powers the Astro Fi, but its the optics inside the telescope tube that make it a Celestron. For over 50 years, theyve led the industry in optical technology and they put that experience into the Astro Fi 90. This 90 mm refractor with fully coated optics offers dazzling views of craters on the Moon, the rings of Saturn, the Great Red Spot on Jupiter, the Orion Nebula, the Hercules Globular Cluster and so much more. Trusted