Sky-Watcher 80/900 AZ-Go2 Explorer Refractor TelescopeSky Watcher 80 900 AZ Go2 Refractor Telescope The Sky Watcher 80 900 AZ Go2 is an 80mm Achromatic Refractor Telescope with a short focal length of 900mm. This makes it ideal for high magnification use, such as viewing the moon and planets. Images viewed through a refractor telescope have a classic quality that other designs lack. Since a refractor does not use mirrors, it delivers a generally sharper image. AZ Go2 Mount The AZ Go2 Mount is WiFi