A Refractor Telescope for All Occasions The Sky-Watcher 102/500 AZ-Go2 Refractor Telescope is the perfect choice for those looking for a telescope that can be easily packed away and stored. This 102mm Achromatic Refractor Telescope has a short focal length of 500mm, making it more compact than other telescopes of the same class. With standard eyepieces, you can enjoy a wider field of view. Plus, you'll get a sharper image with no secondary mirror shadow, making it suitable for terrestrial viewing when used with a 45° erecting image diagonal. The AZ-Go2 Mount - WiFi-controllable with iOS and Android and compatible with SynScan hand controller, allowing it for smooth tracking and alignment. Use Wifi to control the telescope wirelessly with your mobile device, smartphone or tablet.